# Physics

### Featured Answers

### Introduction to Physics

- What is Physics?
- Measurement and Units
- Unit Conversion
- Displacement and Velocity
- Acceleration
- Falling Objects
- Motion Graphs
- Introduction to Vectors
- Vector Operations
- Projectile Motion
- Relative Motion
- Defining Force
- Newton's First Law
- Newton's Second Law
- Newton's Third Law
- Frictional Forces
- Work
- Energy
- Conservation of Energy
- Power
- Simple Machines
- Momentum and Impulse
- Conservation of Momentum
- Elastic Collisions
- Inelastic Collisions
- Circular Motion
- Newton's Law of Gravitation
- Kepler's Laws
- Torque
- Moment of Inertia
- Angular Momentum
- Rotational Dynamics
- Static Equilibrium
- Bouyant Forces
- Pressure
- Fluid Flow
- Gas Laws
- Temperature and Thermal Equilibrium
- Defining Heat
- Specific Heat
- Latent Heat
- Thermal Expansion
- Heat and Work
- First Law of Thermodynamics
- Second Law of Thermodynamics
- Stefan's Law
- Ideal Gas Law and Kinetic Theory
- Simple Harmonic Motion - Springs
- Simple Harmonic Motion - Pendulums
- Wave Properties
- Wave Interactions
- Resonance and Standing Waves
- Sound waves
- Sound Intensity
- Harmonics
- Physics of Music
- Doppler Effect and Shock Wave
- Properties of Light
- Flat Mirrors
- Curved Mirrors
- Color and Polarization
- Refractions
- Thin Lenses
- Total Internal Reflection
- Advanced Optics Applications
- Interference
- Diffractions
- Lasers
- Electric Charge
- Electric Force
- The Electric Field
- Electric Potential
- Capacitance
- Current and Resistance
- Electric Power
- Static Electricity
- Coulomb's Law
- Circuit Diagrams
- Resistors in Series and Parallel
- Complex Resistor Combinations
- Capacitors in Series and Parallel
- Combination Capacitor Circuits
- RC (Resistor and Capacitor) Circuits
- Magnets and Magnet Fields
- Magnetism from Electricity
- Magnetic Force
- Electricity from Magnetism
- Generators and Motors
- AC Circuits
- Electromagnetic Waves
- Quantization of Energy
- Models of the Atom
- Quantum Mechanics
- The Nucleus
- Nuclear Decay
- Nuclear Reactions
- Particle Physics
- A golfer puts 2,046 J of kinetic energy into his golf club, which has a mass of 0.6 kg. What is the speed of the golf club?
- A ball falls from the top of a building. The ball moves 66 m/s just before it his the ground. If the ball has 5,384 J of kinetic energy, what is its mass?
- A running back has 2,799 J of kinetic energy when he runs at a velocity of 5 m/s. What is the mass of the running back?
- The acceleration of a particle is increasing linearly with time t as bt. The particle starts from the origin with an initial velocity V_O.The distance traveled by the particle in time t will be?
- Please help?
- How can you calculate electric impedance?
- A 353 kg roller coaster car is at the top of a 90 m high hill. How much kinetic energy does the car have when it has dropped to a height of 20 meters?
- Please solve with a detailed explanation?
- Two students sitting in adjacent seats in a lecture room have weights of 600 N and 700 N. Assume it is applied to the Gravitation Law can be applied to students?
- If the mass of body is 50 gram do not use formula (w=mg) calculate the weight of mass?
- Numerical numbers calculate the acceleration of a body of 250g when acted by a force of 1newton?
- What is the weight of a body at The centre of earth?
- If lens has different focal length for different colours then how do we see things multicoloured?
- Q. A particle is projected with velocity u= 40 m/s at an angle q = 300, with the horizontal from a point on the ground. FindThe change in velocity between the point of projection and point of impact if these points are on the ground ?
- What is uniform acceleration?
- Where we use convex mirrors in our daily life?
- Why does a iron nail sink in water but a ship made out of water does not?
- Energy input remains constant and voltage remains the same In a circuit, but current decreases. What must be happening?
- The resultant of 2 forces at right angles is 17 N.if the maximum resultant is 23 N,then what is the value of the greater force?
- Sir/madam, could you help me to solve below question? i need to solve it..
- What is the max speed the turntable (rpm) can go before the object 10cm from centre moves with static friction coefficient 0,6?
- What is working principle of ac generator?
- How do you calculate the resultant of the following vectors 4.0N and 10.0N with an angle of 90 degrees between them?
- What shape does the shadow of a vertical stick make on horizontal ground during the day?
- X=xoe^-(bwt)*(cos(wt)+b/(sqrt(1-b)sin(wt)). units of x is mm, t in s. What are the units of w and b?
- Level of water in beaker is 40ml a stone is lowered in it and level rises to 60ml what is the weight of stone dropped?
- Free fall is a state in which an object falls freely with uniform velocity towards the direction of gravity.Is this defination true?
- When a car moves uniformly from 42 km/h to68km/h in 30s. find distance travelled by the car?
- The weight of an object on earth is 20 N. What is its weight on (a) a planet whose diameter is the same as that of the earth but whose mass is twice that of the earth?
- A particle moves in a straight line. It's velocity, #v ms^-1#, at time #t# seconds is given by #v=(t^2 -4)^3#, for #0<=t<=3#?
- A child kicks a stone along the sidewalk with a force of 520 newtons. The stone travels 1.5 meters in .30 seconds. How powerful is the child's kick?
- What Is The Importance Of Physics?
- How do I calculate the bullet’s speed in m/s?
- Paul Konerko hit a 135 m grand slam in Game 2 of the World Series. He did 3,245 J of work. With what force did he hit the ball?
- Does anyone know how i can solve this question plz?
- If 77 W of power is produced in 14 seconds, how much work is done?
- Please solve this question??
- When catching cricket ball, we pull our hands back. why?
- A box of books weighing 325 N moves at a constant velocity across the floor when the box is pushed with a force of 425 N exerted downward at an angle of 35.2 below the horizontal. Find Uk between the box and the floor? Show your work.
- How is #1+2+3+4...=-1/12# used in string theory?
- Please solve this question of mechanics?
- A stone of mass 1 kg is tied to the end of a string of length 5 metre and whirled in a vertical circle . What will be the minimum speed required at the lowest position to complete the circle?
- A person does 13 J of work moving a couch 4.1 m. How much force was used?
- A person pushes a block 7 m with a force of 21 N. How much work was done?
- Springs: what is the height bounced by a spring, mass *m*, initial length #l_0# compressed length #l_1#, spring constant *k*?
- How can i solve this question ?
- Acceleration of two blocks when one is push and one is pulled?
- What do you mean by an electron wave?how come an electron generates a wave while it moves?
- What is the weight of each of the following objects? A. 0.113 kg hockey puck B. 108 Kg football player C. 870kg automobile
- A balloon filled with a lighter gas occupies a volume of 1500 cu metre. Its mass (mass of material of balloon + mass of gas in it) is 1650 kg. Its tied with a rope and floating in air of density 1.3 kg/cubic metre. The pull on the rope is ?
- How can you convert a galvanometer into a voltmeter ?
- Using scientific notation, ¨How long would it take for a F35 fighter jet to get to the sun from the United Sates?¨ - Please include the math problem, I need an example to do all of the other problems.
- The height of geostationary orbit is 42300km from the centre of earth its height above equator will be ?
- Stress can occur without strain, but strain cannot occur with the absence of stress. How explain with an example?
- What is the total peripheral resistance within systemic circulation that has resting cardiac output 5.5Lmin an arterial systemic pressure 130mmhg and diastolic pressure of 95mmhg?
- A lithium-ion battery for a mobile phone has a self discharge rate of 4% per month. What would be discharged after one month for a battery rated at 1.8 V and 500 mAh?
- How can we determine the polarity of solenoid?
- What does it mean to dissipate a force?
- Using dimensional analysis calculate the number of seconds in 0.55 years?
- If two resistors in a parallel circuit have the same values, how do they affect the current?
- A stationary object of mass 4kg is set by a net force of 50N. If the object attains a speed of 5m/s in time, what is the time ?
- A closed pipe and an open pipe of lengths 0.15 and 0.302 respectively sounded together and number of beats 4 per second. What is the velocity of sound???
- If you are going 45 mph, what is your speed in nm per second?
- If a bullet is fired from a point making an angle of 40° to the horizontal H. The initial velocity of bullet is 30m/s what will be it greatest highet reacted and the time to takes to reach maximum higher?
- What are limitations of ohms law?
- A shell is fired at an angle 30 degree to the horizontal with a velocity 392 m/s. Find the total time of flight horizontal range and maximum height attained?
- How to find the static friction between stacked blocks so that the top block does not slip when the bottom block is accelerated?
- State the factors that influence gravity within the surface of the earth ?
- Two dissimilar metals joined at their ends kept at constant temperature constitute ,a thermocouple ?is it true?
- a mars lander weighs 767pounds on earth but only 291 pounds on mars it the mars rover weighs 155 pounds on mars, how much does it weigh on earth?
- A motorcyclist moving with uniform retardation takes 10s and 20s to travel successive quarter kilometer.How much further he will travel before coming to rest?
- How does the speed of the particals of a gas change when the gas is heated?
- What is the relationship between air pressure and flight?
- Can I get some help with this one please? Thanks a lot!
- What does simple harmonic motion entail?
- A helicopter flying west begins experiencing an acceleration of #3# #m##/s^2# east. Will the magnitude of its velocity increase or decrease?
- Can you please Explain the relationship between current in a RC circuit (capacitor with capacitance C and Inductor with Inductance L) in terms of L and C ?
- The position of an electron is given by #vecr=3.63t hati - 5.73t^2 hatj + 8.16 hatk#, with #t# in seconds and r in meters?
- When a boy pulls his sled with a rope, the rope makes an angle of 35° with the horizontal. If a pull of 16 pounds on the rope is needed to move the sled, what is the horizontal component force?
- Is energy is stored in a string of constant K by stretching or extending it the energy stored per unit extension is?
- An object acted o by three forces moves with a constant velocity?
- If 2,514 J of heat is put into an engine, but only 1,559 J of work is produced, how much energy is wasted by this engine?
- A subcompact car, mass 1,000 kg, runs into and sticks to an at-rest, 2,200 kg SUV. lf their final speed is 4.7 m/s, what was the smaller car's initial speed?
- How does density affect static friction?
- Why magnetic field never intersect each other?
- I also need some help solving this problem please. Thank you very very much!?!
- The figure shows five 6.83 Ω resistors. Find the equivalent resistance between points (a) F and H and (b) F and G?. (Hint: For each pair of points, imagine that a battery is connected across the pair.)
- What is the frequency of kinetic energy of a particle executing simple harmonic motion?
- As the frequency of a wave traveling at constant speed increases, what decreases?
- What is centre of bouyancy?
- If a 65 kilogram student exerts a force with a magnitude of 100 N on a 100 kilogram desk the magnitude of the force that the desk exerts on him is?
- What is slow and fast motion?
- How much energy, in joules and in kW•h, is consumed by a 120 W light bulb if it is left on for 15 min?
- A snail is moving at 4 mm/hour but sees another snail and decides to race. It is now going 6 mm north in 2 hours. What was the snail's acceleration?
- What is the coefficient of linear expansivity?
- Theory of photo electric effect?
- What are the properties for Steel wire, Copper wire and Nichrome wire?
- Focal length of convex lens is 3cm. Find the image distance if object of height 2cm is placed at 7cm from lens?
- Marcus dropped a penny into a wishing well and heard it hit the bottom exactly 1.5 seconds later. How deep is the well?
- A hydraulic press contains 0.25#"m"^3# of oil of bulk modulus 50000000pa the change in volume of oil when subjected to increase pressure of 60000000pa is?
- What is a curved mirror?
- A black body emits radiation at the rate P when its temp. is T. At this temperature the wavelength at which the radiation has maximum intensity is λ. If at another temperature T' the power radiated is P' and wavelength at maximum intensity is λ/2 then?
- If current is decreased then drift velocity decreases?
- Physics trajectory question?
- If electric current is flow of electrons,then why current's direction is opposite to flow of electrons in a conductor?
- What is the formula for average force?
- If a car averages 32 miles per hour, how far will it go in 20 minutes?
- A space shuttle 340 miles above the earth is orbiting the earth once every 11 hours. How far does the shuttle travel in 3 hours? (Assume the radius of the earth is 4,000 miles.)
- In a closed organ pipe of length 105 centimetres standing waves are setup corresponding to 3rd overtone. What distance from the closed end a pressure node is formed? ANS:15 cm
- What happened to momentum if kinetic energy increase 3time?
- I have two graphs: a linear graph with a slope of 0.781m/s, and a graph that increases at an increasing rate with an average slope of 0.724m/s. What does this tell me about the motion represented in the graphs?
- Why motion and rest are relative?
- Which light diverge in prism?
- A stone is dropped on the surface of water in a pond.Name the type of waves produces?
- In one cycle, a heat engine takes in 1,148 J of heat from a high-temperature reservoir, releases some heat to a lower-temperature reservoir, and does 347 J of work. What is its efficiency?
- A box of mass 40kg is pushed up a 2m inclined plane.What is the work done by the 250N force when the box reaches the top of inclined plane which is 1m above the ground? a)250J b)400J c)500J d)800J
- A heat engine with an efficiency of 30 % does 834 J of work in each cycle. How much heat must be supplied from the high-temperature source in each cycle?
- A 200 kg roller coaster goes down its first drop at 100m. What is the coasters speed at the bottom of the hill ?
- If % decrease in k.E energy is 10% what is % decrease in momentum?
- An engine wastes 491 J of heat while producing 670 J of work. How much heat must be coming into the engine from a hot reservoir?
- Two masses of 10 kg and 5 kg are suspended from a fixed support. The system is pulled with a force of 150 N to the lower mass. The string breaks off. What is the tension in the string between the masses if the force stops acting at that moment?
- One ship going towards east with speed 10 km/h. At the same time one boat going towards east making an angle 30 with east. Calculate the velocity of boat, so that passenger from the ship assumes that boat is gong towards north?
- The red light has the longest wavelength in spectrum so according to equation e=hc/lamda but than why it proves ienstine equation e=mc^2 wrong?
- What is the magnitude of the electrostatic force of a 1.5 x 10–3 c charge located 1.5 m away?
- When two capacitors are connected in series and connected across 4kV line, the energy stored in the system is 8J. The same capacitors, if connected in parallel across the same line, the energy stored is 36J. Find the individual capacitance ?
- What is resonance and what is natural frequency; is it the same as fundamental frequency ?
- A particle moves along the x axis according to the expression x= 2+3t-t2 where x is position in m and t is the time in s find the average acceleration of the particle during the time intervals 0 to 2s ?
- 7. A bike accelerates uniformly from rest to a speed of 7.10 m/s over a distance of 35.4 m. Determine the acceleration of the bike?
- A dancer lifts his partner above his head with an acceleration of 1.5 m/s. The dancer exerts a force of 575 N. What is the mass of the partner ?
- What is the change in momentum that occurs when a 1.0 kg ball traveling at 4.0 m/s strikes a wall and bounces back at 2.0 m/s?
- A motorboat can travel upstream on a river at 18 km/h and downstream at 30 km/h. How far upstream can the boat travel if it leaves at 8:00 A.M. and must return by noon?
- Diagram of two capacitors in series with one capacitor in parallel and again in series with one capacitor?
- Question is shown below?
- Please help with this physics problem?
- What is the action/reaction force pair involved when you catch a ball?
- Period of conical pendulum?
- What is S.i unit of heat ?
- A stretched wire of length 0.5 m vibrates at the fundamental frequency 250 Hz. The tension in the wire is 35 N. Calculate the mass per unit length. Give your answer in g/m.?
- What is string theory?
- A body mass 5kg is acted upon by two perpendicular forces 8N and 6N. Give the magnitude and the direction of the acceleration of the body?
- Is accelaration possible in constant velocity? Does in circular motion constant velocity occure?
- A ball is thrown (from rest) from a tall building. After 3 seconds. What is the velocity ?
- If a ball throwing vertically up ward reach a maximum height at 50 above the level of projection what will be it time taken to reach higher and the speed of the thrown (take g=10m/s2)?
- Determine the maximum K.E of photo electrons ejected from a potassium surface by UV radiation of wave length 200nm. What retarding p.d is required to stop the emission of electrons? The photo electric threshold wave length for potassium is 440nm?
- The angle of incidence of the light ray on the air/plastic interface is 63° The angle of refraction of the light ray from the air/plastic interface is 47° Determine the refractive index of plastic? The index of refraction of air = 1.0003?
- What is the effect of different masses on the speed of a toy car? (simple explanation to a 6th grader)
- Why same length of spring has same freqeuncy ?
- What is the difference between a negative of a vector and difference vector?
- What is the effect on rotational kinetic energy if angular velocity is doubled of its initial value?
- When ball is vertically thrown up with velocity "V" it reaches height "h" why is it that when the velocity is doubled "2V" the height becomes " and not "4h" and not "2h" ??
- Calculate the pressure amplitude for a sound level of 40 decibels?
- A gnat takes off from one end of Bob's pencil and flies around erratically for 41.1 seconds before landing on the other end of the same pencil. If the gnat flew a total distance of 4.65 meters, (please read details)?
- #T=(rrhohg)/(2costheta)=(rrhohg)/(2)#?? How and where is the cosθ?
- How can the fact that #1+2+3+4...=-1/12# in string theory?
- Why are sound recordings needed to preserve sound information?
- A ball with charge -50e is placed at the center of a hollow spherical conducting shell has a net charge of -50e. What is the charge on the shell's outer space? ((please solve with details))
- The mass of the body is changed to one fourth of its mass. What change in its velocity will keep the kinetic energy unchanged ?
- The speed of a particle after t seconds is given by v = 7 + 25t - 4t^2. Find the acceleration of the particle after 2 seconds?
- A 50kg man is running at a speed of 18 kmph If all the kinetic energy of the man can be used to increase the temperature from 20°c to 30°c ,how much water can be heated with this energy?
- If two springs of different spring constant parallel to each other are attatched to a common weight vertically then can elongation be same in both ?
- A 6 kg shell is fired with a 30° angle,v= 40 m/s. At the highest point it devides into 2 parts,one 2 kg and the other 4 that move in the horizontal line and 2 kg hits the ground at the start point.where the 4 kg piece hits the ground?
- Why the formula for calculating moment of inertia is same for hoop and disc?
- You run away from a plane mirror at 1.80 m/s. At what speed does your image move away from you?
- Why does a buoyant force act on every object in a fluid?
- The best leaper in the animal kingdom is the puma, which can jump to a height of 3.7 m when leaving the ground at an angle of 45°. With what speed must the animal leave the ground to reach that height?
- A car is moving on a horizotal circular road of radius 144m with uniform speed 12m/s.It suddenly accelerates at 1m/s^2.Now the accelearation will be? a)1 b)2 c) √2
- Write your question here... Two radioactive elements P and Q have half lives 10 and 20 minutes respectively. If they started if with the same number of atoms, what is the ratio of the number of remaining atoms of P to that of Q?
- A sound wave has wavelength of 6m and a velocity of 420m/s.what is its frequency ?
- Suppose that 6 J of work is needed to stretch a spring from its natural length of 34 cm to a length of 49 cm. How do you answer (a) and (b)?
- An object has a kinetic energy of 25 j and a mass of 34 kg, how fast is the object moving?
- What is the kinetic energy of a 150kg object that is moving with a speed of 15 m/sec?
- What is the vertical component of the resultant force on the balloon?
- Question in the details please help asap would be greatly appreciated?
- A particle is moving along a circular path of radius 5m with uniform speed 5m/s. What will be the average acceleration when the particle completes half revolution???
- Intensity of two light waves are I and 4I what will be the intensity if phase difference is 2pi and pi? Thank you for help
- A particle is acted on by constant forces =-3i+2j+5k and 2i+j+-3k and is displaced from point (2,-1,-3) to the point (4,-3,7).Find the total work done by the forces?
- What is the ratio of the potential energy if the height is made doubled of a vertically projected bodies?
- Position of the body at x=t²-6t+5 find average velocity and average speed and acceleration at t= 6sec ?
- If an unmagnetized piece of iron is attracted to one pole of a magnet, will it be repelled by the opposite pole?
- Kinematics: would you help me?
- An object is placed at a distance of 30 cm in front of a convex mirror of focal length 15 cm .find the nature and position of image ?
- When H (1 nucelons) collides with Li (7 nucleons) and results in two He(4 nucleons) is this fission? I thought fission only occured when cores with more nucleons than Fe (58) was involved
- What is the momentum of a bowling ball and putty together after a 1-kg chunk of putty moving at 1 m/s collides with and sticks to a 5-kg bowling ball initially at rest?
- What do you mean by the resonance frequency of a tuning fork or a stretched string?
- Motion is best described as an objects change in position relative to a?
- If #r_1=4hati+hatj-4hatk#, #r_2=-2hati+2hatj+3hatk# and #r_3=hati+3hatj-hatk#, then show that #|r_1+r_2+r_3|=7#?
- What is the average braking force of a 1000-kg car moving at 10 m/s braking to a stop in 5 s?
- 1.The moon orbits 384400km above the surface of the earth. a).What is the moon velocity ? b).At this velocity, how long does it take the moon to orbit the earth? c).What is the strength of the earth gravitational force at this orbital distance?
- A steel ball drop from a tower strikes in 3 seconds find the velocity when which a ball strikes a ground and a high of a tower???
- If one neutron is added to Helium nucleus, the result is? a) Lithium b) Helium c) Hydrogen d) Carbon
- A skateboard takes 8.0 seconds to accelerate at a constant rate from rest to a speed of 4.0 m/s. If the mass of the skateboard and rider together is 85 kg, what is the net force acting on the bicycle?
- A student pushes a 200kg mass with a force of 10N but the mass does not move.What force does the mass exert on the student? *Any particular formula used to calculate this ?
- If vector P+vector Q=vector R ;and if P^2+Q^2=R^2 then find the angle between the vectorP and vectorQ?
- How is electricity made in coal power plants?
- In electrical insulators, why are the electrons not free to move unlike in conductors? Is it due to stronger bonds or attraction between nucleus and electron?
- What is the kinetic energy in joules?
- How can we draw magnetic field lines?
- In a circular motion? A) particle cannot have uniform motion B) particle cannot have uniformly accelerated motion C)particle cannot have net force equal to zero D)particle cannot have any force in tangential direction
- A bird is flying with a speed of 18 m/s over water when it accidentally drops a 2 kg fish. Assuming the altitude of the bird is 5.4 m, and disregarding friction, what is the speed of the fish when it hits the water?
- Fuse should be high resistance?
- Two blocks of masses #m_1# and #m_2# are connected with a light spring of force constant #K# and whole system is kept on a frictionless horizontal surface the masses are applied forces #f_1# and #f_2# respectively?
- Explain why you sometimes get an electric shock when you get out of a car seat?
- The driver of a 840.0 kg car decides to double the speed from 23.8 m/s to 47.6 m/s. What effect would this have on the amount of work required to stop the car, that is, on the kinetic energy of the car? KEi= × 105 J KEf= × 105 J
- How will we figure out the pressure on the ground exerted by a ballerina?
- A 53.6 kg person will need to climb a 2.9 m stairway how many times to "work off" each excess Cal (kcal) consumed?
- How to determine the current over each resistance? Thank you!
- Use g = 9.8 m/s2. If 5,010 J of work is used to raise a 137 kg crate to a shelf in a warehouse, how high was the crate raised?
- Resistance physics?
- A note has a wavelength of 0.77955 m. If the speed of sound is 343.00 m/s, what pitch is this note?
- A force of 160 N is needed to push a table across a level classroom floor for a distance of 3.4 m. How much work was done on the table?
- A force #vecF = (3xy -5z)hatj + 4zhatk# is applied on a particle. The work done by the force when the particle moves from point #(0,0,0)# to point #(2,4,0)# along the path #y = x^2# is?
- Can someone help me answer this linear momentum problem, thanks?
- At 7..35 cents per kilowatt-hour, what does it cost to operate a 10.0 hp motor for 8.00 h?
- A particle projected at a definite angle #alpha# to the horizontal passes through points #(a,b)# and #(b,a)# referred to horizontal and vertical axes through the point of projection. Then?
- An aircraft is flying at a height of 3400m above the ground.if the angle subtended at a ground observation of a point by the aircraft positions 10 s part is 30° , what is the speed of aircraft?
- What is the speed in km/h if the distance is 500 metres and time taken = 100 seconds ?
- The absolute potential at a point distant 20 cm from a charge of 2 microcoulomb is what?
- A 67.2kg Student runs up the stairs of a football stadium to a height of 10.1 m above the ground in 12.2s. What is the power of the student in KW? And in hp?
- A car accelerates uniformly @ 0.2 m/s square and retards uniformly @ 0.3 metre per second square . If it attains maximum velocity of 108 km/hr, find the least time in which it can complete a journey of 6 km?
- What is the function of the split ring commutator and carbon brushes in an electric motor?
- How to determine the voltage Ub2 so that the current through R2 would be equal to 0,150A using Kirchoff's Law? Thank you!
- A ball is dropped from a height of 64 feet. its height, in feet, can be modeled by the function h(t)= -16t + 64, where t is the time in seconds since the ball was dropped. after how many seconds will the ball hit the ground?
- The distance from the crest of one wave to the crest of the next wave is the ?
- What is this (MVR=nh÷2π)?
- Find the length of an antenna operating at 500 kHz, if the antenna is one-forth of the wavelength?
- What is the kinetic Energy and the potential energy of an object with a mass 300g falling from a height of 200 cm? What is the final velocity just before it hits the ground if the object started from rest?
- Two strings are tuned to the same pitch (#184# Hz). Later you increase the tension in one string. Now, when both strings are played, there are 2 beats every second. What is the new frequency of the string that was tuned?
- You and a friend each drive 100 km. You drive 135 km/hr while your friend drives 85 km/hr. How many minutes will you wait before they arrive?
- What is the wavelength of a signal if the operating frequency is 521.143 MHz?
- What is the frequency of the wave if the wave has 4000 cycles in 4.5 seconds?
- Could object distance of convex lens be negative?
- A particle has initial velocity, #v = 3hati + 4hatj# and a constant force #F = 4hati - 3hatj# acts on it. The path of the particle is?
- The acceleration-time graph of a particle moving in a straight line is as shown in figure. The velocity of the particle at time t = 0 is 2 m/s. The velocity after 2 seconds will be ?
- A vehicle travelling with a uniform velocity was given a uniform acceleration, and in the sixth and tenth seconds after the acceleration began it was observed to travel 15 m and 23 m respectively. What is the acceleration and the initial uniform velocity?
- An athlete can jog at twice her walking pace. By walking for a total of 1h 40 min and jogging for a total of 30 minutes she covers a distance of 16km. What is her walking pace in kilometeres per hour (kph)?
- V(open circuit)=? Rth=? (R=50,P=?) (R=12.5,P=?)
- Write one example in which a force does zero work ?
- Is light a wave? Proof?
- Gaint wheel is an example for conservation of angular momentum?
- Do large damping force on a body means large change in amplitude why?
- At what speed mould the mass of a proton be double?
- What is the difference between induce emf and back emf ?
- How buoyant force depends on the mass of the partly emmersed body?
- How can you increase a machine's efficiency?
- What is the average velocity in the time interval t = 2.25 s to t = 6.00 s?
- How is this accomplished in your automobile? Second, the charge in a vehicle's battery drains every time it starts. How does the battery replenish the lost charge?
- What is a vernier caliper?
- A car traveling 85 km/h strikes a tree. The front end of the car compresses and the driver comes to rest after traveling 0.80 m. What was the average acceleration of the driver during the collision?
- A man is standing on a cart of mass double the mass of man. Initially cart is at rest on a smooth ground. Now man jumps with relative velocity 'v' horizontally towards right with respect to cart. Find the work done by man during process of jumping?
- How is physics applied in medicine apart from x-rays ,radiation and radio active decay?
- There is a boy with a mass of 55kg starting at rest going down a slide which is 4m high (y distance) and 6m (x distance) and his final velocity at the end is 4.5m/s then what is the average F of friction acting against him as he goes down the slide?
- The resultant of two forces 3p and 2p is R . If the first is doubled then the resultant is also doubled.What is the angle between the two forces?
- Describe the energy transfers of an electron around the circuit when the switch is closed?
- I have only proton and neutron then how to find out neutron or its mass?
- How would i find the image distance given object distance, two radii of curvatures, and index of refraction? (See details below)
- Focal length of normal eye is 1.7 cm,but if we placed the object inside focal point of eye lens the image formed must be virtual which can not be obtained on screen.Then how we are able to see the image of that object??
- A bullet has a speed of 250 m/s as it leaves a rifle. If the rifle is fired 50 degrees from the ground a. What is the time flight in the ground? b. What is the maximum height? c. What is the range?
- Suppose an iron ball weighing 10 N were dropped from a height of 10 m from the ground, what would be the change in temperature of the ball? Assume that no heat was lost to the surroundings. (Specific heat of iron = 0.42 J/g°C).
- If a particle makes 1.5 revolution in a circular path of radius 2cm. The angular displacement is...??
- How much work is required to lift a 700kg satellite to an altitude of 1x10^6m above the surface of the earth? The radius of the earth is 6.4x10^6m, its mass is 6x10^24 kg, and in these units the gravitational constant, G, is 6.67x10^-11
- Can someone help me with this kinetic energy problem?
- A stone is thrown horizontally from the top of a building 12.3 m/s. If the stone strikes the ground after 1.92s. Determine the height of the building and the horizontal distance traveled?
- A particle undergoes three consecutive displacements: d1 = (15ˆi + 30ˆj + 12ˆ k) cm, d2 = (23ˆi + 14ˆj + 5.0ˆ k) cm and d3 = (-13ˆi + 15ˆ j) cm. Find the components of the resultant displacement and its magnitude?
- A particle is moving with constant speed v on a circular path of r radius when it has moved by angle 60°, Find (i) Displacement of particle (ii) Average velocity (iii) Average acceleration?
- What determines the speed of light in a medium?
- If you free a neutron from a nucleus, it will decay into three particles. Two of them are proton and electron.What is the third particle?
- An object falling freely from rest near the surface of the earth falls a distance of 64 ft by the end of two seconds?
- If an object has an acceleration of 10 m/s2, its velocity will increase by 10 m/s every second?
- A roller coaster has a mass of 250 kg. It drops from rest at the top of a hill that's 88 m tall. How fast is it going when it reaches the bottom?
- How do i? Show that box A has to be 2,0 kg when force F=30N which leads the acceleration to be a=10m/s^2
- displacement?
- A dynamic body collides a static body of the same mass what will happen?
- What happen to the moment of inertia when the velocity is double?
- The length of a hallway is #25# meters and the width is #2# meters . A laser is pointed across a mirrored with an angle of #55# degrees. How many times will the laser beam reflect off mirror 1? Image below
- How can I find the change in speed for a car going 12 m/s and it takes 3 seconds to stop?
- A 63 kg bobsled is pushed along a horizontal surface by two athletes. After the bobsled pushed a distance of 7.2 m starting from rest, its speed is 4.8 m/s. What is the magnitude of the net force on the bobsled?
- Can anybody help with this problem?
- Can someone help me with this question?
- Is pitch depends upon amplitude?
- How do you calculate acceleration?
- General gas equation in mathematicaly?
- A ball floats on the surface of water in a container exposed to atmosphere. Will the ball remain immersed at its initial depth or will it sink or rise some what if the container is shifted to moon?
- A force of 9.0N is applied on a body at rest on a horizontal surface,if the body has a mass of 18.0kg on it moves in a direction y of the force,find the work done in A.the first four seconds.? B.the fourth second.?
- What do unbalanced forces cause concerning speed?
- A bowling ball with negative initial velocity slows down as it rolls down the lane toward the pins is the bowling balls acceleration positive or negative as it rolls towards the pins?
- A rat was 15m ahead of cat. the cat started running to catch the rat with a uniform acceleration of 2ms-2. the rat was running with a uniform velocity of 14ms-1. Would the cat be able to catch the rat?Please explain with maths
- Why it is essential to have a standered system of units?
- The answer is given below someone show the calculation pleases?! I am stuck at this question
- A lens has a power of +5 D in air. What will be its power if completely immersed in water? (refractive index of water w.r.t air = 4/3 and refractive index of glass w.r.t. air = 3/2)
- What are examples of translucent?
- A250kg helicopter accelerates upward at 3.0m/s2 . What lift force is exerted by the air on the helicopter? (Take g=9.8m/s2)
- Radius of earth: #6.4xx10^6" m"# Density: #5.5xx10^3" kg/m"^3# G: #6.67xx10^-11" N"*"m"^2"/ kg"^2# Find gravitational potential?
- A force of 8N is applied to body at rest.it attains a velocity of 12m/s in 10 sec.what is the mass of the body?
- A stone is thrown vertically upward at a speed of 22 m/s. Its height, h metres, after t seconds, is given approximately by the function h(t)=22t-5t^2. How do I use the formula to find the amount of seconds when the rock is 15 m up?
- If capacitance of capacitor in ac circuit is increased 3times its initial value then capacitive reactance will decrease or increase and how many times?
- How to get the electric power in each resistor when there's only one voltage in a circuit?
- An electric car is designed to run off a bank of 12V batteries with total energy storage of 2.0x107J. If the electric motor draws 8.0kW as the car moves at a steady speed of 20m/s, how far will the car travel before it is out of fuel?
- A plain falls 144 feet in three sec how far does it fall in 1 sec?
- Why do scientists use models to study atoms?
- Calculate the force in Newtons necessary to accelerate 60 kg at a rate of 2 meters squared?
- The speed of electron in ground state orbit of hydrogen atom is ?
- What is force? What can it do? Write its si unit
- What should I look at? What formula do I use? How should I approach this problem? Any help/advice/tips is appreciated.
- What if earth suddenly stop rotation?
- What is the critical value of μs?
- Can you help me with this question?
- Can anyone tell me about the Dirac's Equation meaning?
- When a wheel 1m in diameter makes 30 rev/min the linear speed of a point on its rim in m/s is? a)pi b) pi/2 c) 30pi d)60pi
- How voltage and current increase and decrease in a transformer .I have been reading in text book that when current increases the voltage will decrease?.plz someone explain it in detail....
- An E note has a frequency of 659.26 Hz. Calculate its wavelength in meters?
- The ground state energy of hydrogen atom is -13.6eV. hence the energy of the electron of a doubly ionised lithium atom in its 1st orbit will be what ?
- One body is thrown vertically upward with initial velocity of 20m/s.2 seconds later another is vertically thrown from the same place with the same speed.at what height will they collide?
- Explain why is P.d.across the terminal of a cell more in an open circuit and reduce in a close circuit?
- The larger the vehicle is,the larger the tyre of the vehicle why?
- The first ball of mass m moving witha velocity u collides head on with the second ball of mass m at rest.If the coefficient of restitution is e,then what is the ratio of the velocities of the first and the second ball after the collision?
- How fast should a wire 20 cm long be moved through a 0.05-T magnetic field for an emf of 1 V to appear across its ends?
- The excess pressure inside a small air bubble of radius 0.05mm in water of surface tension 70 dyne/cm-1 (in pascals)?
- A long and light helical spring is stretched 4.68cm when a given mass is hung on it. what is the period of vibration of the mass if pulled down a little and then released?
- Find the scalar product of the vectors 5i and 8j?
- If we fire a bullet in a free-falling elevator then will it form an arc or not? If not, then please tell why?
- A spherical ball of radius r and relative density 0.5 is floating in equilibrium with half of it immersed in water. The work done in pushing the ball down so that whole of it just immersed in water is? [#rho# is the density of water].
- A particle of mass 0.3kg is subjected to a force F=-kx with k=15N/m.What will be it's initial acceleration if it is released from a point 20cm away from the origin?
- A friend tells you that a rowboat is propelled forward by the force of its oars against the water. Explain if the statement is correct then identify the action and reaction forces. How would I do this?
- Falling objects question?
- Why we see due to light?
- What is difference between Newton law of gravitation and columbs law?
- Person connects four cells in series but one cell has its terminal reversed. the internal resistance is 0.25 Ohm. If Each cell has an emf of 1.5 V the current flowing is? - a) 1 A b) 2.5 A c) 1.5 A d) zero
- Kinematics: Would you help me find the solution?
- A delta-wye transformer has a turns ratio of 9:1. The primary line voltage is 3600 V. What is the secondary line voltage?
- How much frictional force would exist if an object were pulled at 0.1 m/s across the table?
- How does temperature affect flow rate?
- If a car starts at rest and increase to a final velocity of 50 mi/hr north over a time of 5 hours, what is its average acceleration?
- A motorcycle stuntman rides over The vertical walls of a circular well at an average speed of 54kph for 5minutes, if the radius of the well is 5meters then the distance traveled is?
- An object 5 millimeters high is located 15 millimeters in front of a plane mirror. How far from the mirror is the image located?
- If an object travels a distance of 10 meters in 5 seconds, what is the objects average speed?
- What are the energy conversions that take place during a roller- coaster ride?
- How do I find the phase difference for this question?
- Please solve this capacitor question?
- A particle is executing SHM.At a point x=A/3.kinetic energy of the particle is K,where A is the amplitude. at a point x=2A/3,kinetic energy of the particle will be?
- A train leaves a station at 6pm traveling west at 80 mph. On a parallel track, a second train leaves the station 3 hours later traveling 100 mph. At what time did the second train catch the first train?
- Which of the following is a velocity?
- Help please?!
- What is the time constant?
- A resistor is constructed of a carbon rod that has a uniform cross-sectional area of 5.0 mm^2. When a potential difference of 15V is applied accross the ends of the rod there is a current of 4.0x10^-3 A in the rod. What's the rod's resistant and length?
- Prove that the magnetic moment of a hydrogen atom in its ground state is eh/(4πm)?
- The phase velocity of waves is a certain medium is represented by #V=C_1+C_2(lamda)# where the C are constant .What is the value of group velocity?
- The rate of rotation of a solid disk with a radius of #3 m# and mass of #4 kg# constantly changes from #2 Hz# to #5 Hz# over #8 s#. What torque would was applied to the disk at #2 s#?
- At 1:05 pm, a van started driving at a constant speed of 60 km/h. At 1:35 pm, a car moves off from the same place as the van at a constant speed. After traveling for 210 km, the car caught up with the van. If the van and the car continued traveling at?
- If the faster stone takes 10 seconds to return to the ground, how long will it take the slower stone to return?
- Maria and Ming start at the same point and drive in opposite directions. Maria drives 30 mph and Ming drives 32 mph. How far apart will they be in 2 hours?
- Deceleration of a point when it is momentarily at rest moving along a straight line with velocity 16-t^2?
- 2 vectors. 1st one is 6 meters. The other one has is 4 meters. By adding them together I want a module of 3 meters. What should the angle between those modules be? The answer is 153 degrees but I have no idea how to get to that answer. Thank you!
- What's the Kinetic Energy of object being pulled?
- What is the automobile’s mass?
- A 0.5 kg dart moving horizontally at 10 m/s strikes and sticks to a wood block initially at rest of mass 1 kg, which slides across a friction-free level surface. What is the speed of the block and dart after collision?
- What type of energy is a rubber band stretched on a hand? A spring?
- Can someone verify my answer?
- When or in which things is voltage directly propotional to resistance?
- A car that weighs 4004 lbs moves at 33 m/s. How much time is needed to stop the car if the braking force is -1650 N?
- Absolute zero is the lower limit of temperature. is there an upper limit of temperature?
- Towns M and N were 410 km apart. At 9:15 am, Jeffrey set off from town M for town N at an average speed of 80 km/h. 45 minutes later, Marcus set off from town N for town M at an average speed of 120 km/h. At what time did they pass each other?
- I don't understand this about fission and fusion, could somone help me?
- What is the difference between speed and velocity?
- Which of the following is NOT an example of acceleration?
- If a boy runs at a speed of 5 m/s for 10 seconds, how far did he run?
- If the golf ball has a mass of about 49.0 g, what is the ball’s speed?
- Which quantity changes at the anti-nodes in a stationary wave?
- Does m/s stand for?
- An object is thrown with half of the kinetic energy needed to free an object from the attraction of the earth. How far will the object reach from the earth's surface?
- A boy is sat at a semisphere with a ray of 18.4 m. He starts sliding. On what height will the boy loose contact with the sphere? There is no friction.
- How do you prove that đq is not an exact differential for an isobaric process using #đq = dU - đw# where the only work is PV work?
- The range of projectile when launched at an angle of 15° with the horizontal is 1.5 m. It's range when launched at 45° with the same speed is?
- Why it is multiply by m/m when deriving the relationship between KE & p?
- In the equation of a standing wave where y=2Asin(kx)cos(wt),what does 'w' represent?is it representing the standing wave's frequency or the frequency of any particle in that wave?
- A 7 kg mass is moved across a table at 25 m / s2 . What force causes this acceleration ?
- During collisions, more massive vehicles provide greater safety than smaller ones. How to explain this on the basis of conservation of momentum?
- The sound intensity level at a point 4 m from the point source is 10 dB,then what will be the sound level at a distance 2 m from the same source?
- A pendulum in lift is moving downward with g/3 .what would be its T?
- A 70 kg astronaut is floating motionless in space holding a 4kg hammer how fast and in what direction must she throw the hammer in order to propel her body with a speed of 3m/s toward the spacecraft?
- How to convert these equation to linear equation ?
- A baby sitter pushing a stroller starts from rest and accelerates uniformly at a rate of 0.628 m/s2 . What is the velocity of the stroller after it has traveled 6.31 m? Answer in units of m/s.
- How do you do B,C,D? (Physics/Velocity)
- A car with a mass of 1,500 kg is traveling at a speed of 30 m/s. What force must be applied to stop the car in 3 seconds?
- A charge of 2 coulomb is in a field of intensity 2 N/C. The force on charge is what?
- A cube (density 0.5gm/cc) of side 10cm is floating in water kept in a cylinder beaker of base area #1500cm^2#. When a mass m is kept on the cube, level of water rises in the beaker by 2mm. Find mass m?
- The percentage change in the time period of simple pendulum if its length is increased by 2% is?
- Unit of linear momentum?
- A sphere of radius 'r' is charged to a potential V. The outward pull per unit area of its surface is given by;...????
- What is the effect of friction on the motion of a body?
- An input force of 20 newtons is applied to a lever at a distance of 2 meters from the fulcrum. An object 0.5 m away from the fulcrum (and on the other side) is lifted by the 20-N force. What is the output force?
- You place a 133 g is placed on a vertical spring. The spring then compresses by 11 cm. What is the stiffness of the spring (in kg/s^2)?
- What is the two factors that the period of simple pendulum depends on?
- What is the boat’s final speed?
- If the tree’s initial kinetic energy is zero, what is the final kinetic energy?
- If the distance between two masses is tripled, by what factor is their gravitational force changed?
- what is quantum physics?
- A horizontal power line carries a current of 6180 A from south to north. Earth's magnetic field (82.2 µT) is directed toward the north and is inclined downward at 69.0° to the horizontal?
- what was Burrell’s mass?
- What is its speed?
- An increases in a sound's pitch corresponds to an increase in what other property?
- Golf Rocio strikes a 0.058 kg golf ball with a force of 27 N and gives it a velocity of 62.0 m/s. How long was Rocio's club in contact with the ball?
- Can you tell me an example where you can use both Newton's laws and energy conservation to solve the problem and the priorities of each method?
- (a) What is the velocity of the boat at t = 10 s? (b) What is the position of the boat at t = 10s?
- What is the maximum kinetic energy of the disk?
- Two planes, which are 2670 miles apart, fly toward each other. Their speeds differ by 90mph. If they pass each other in 33 hours, what is the speed of each?
- The earth comes between the sun and the moon explain what hapens in the following cases?
- If velocity is 0 and acceleration was set to m/s^2, then the distance is _____ meters after 2 seconds and ________ meters after 3 seconds?
- How to calculate maximum beta energy (0.634 MeV) of fluorine-18? I've tried using binding energy formula, but the result is different?!
- The resistance R and temperature θ for an electric conductor is given as R=R0+aθ with R0 as the resistance at 0°C and a as a constant. A graph of R against θ is shown in the diagram below. What is the resistance of the conductor at a temperature of 60°C?
- If velocity is set to 2 m/s, (a=0) then the distance traveled = ________meters after 2 seconds, ___________ meters after 3 seconds, and ________ meters after 5 seconds?
- A small car with a mass of 800 kg travels northward at 29 m/s. Does the car have more or less momentum than a truck with a mass of 12000 kg traveling eastward at 17 m/s? more correct less Correct: Your answer is correct. How much more or less?
- High altitude mountain climbers do not eat snow, but always melt it first with a stove. To see why, calculate energy absorbed from your body if you: (more information see details)?
- Can someone explain how to get these answers? ( Velocity/Acceleration Question)
- If a textbook weighs 18N. What's the mass of the book? and how do you find it
- What is t = 12.5 s to t = 37.5 s?
- Give a brief description about ENTROPY in physics?
- In a scene of a movie, the superhero grabs the villain by the neck and throws him forward. The superhero, however, remains stationary. Does this scene violate the law of conservation of momentum? Why or why not?
- The coefficient of volume expansion of a solid is x times its coefficient of areal expansion. what is value of x?
- How similar or different are the magnetic field patterns produced by two bar magnets when; a.) like poles are facing each other? b.)when unlike poles are facing each other?
- Are utube is partially filled with water . An liquid which is immiscible with water is poured into side it stands at a height h1 above the level of water on the other side which has while risen h2 . RD of the liquid?
- A wave represented by the equation Y =a cos (kx-omega t) is superposed with another wave to form a stationary wave such that the point x =0 is a node.What is the equation of the Other wave? ........ ANS:-acos(kx+omega t)
- Derive the ideal gas equation? PV=nRT.
- A body having mass 100 gram is allowed to fall freely under the gravity. Find its kinetic energy after 10 sec.(g = 1000cm / sec^2) ?
- A half immersed sphere with radius R and relative density 0.5 is in equilibrium with water. The sphere is pushed down lightly into the water and released. What's the oscillatory frequency of the sphere? Density of water is #1.0 g//cm^3#.
- Physics help ??
- Help me please ??
- Help please ??
- Is there any difference between impulse and momentum?
- What is the frequency of the body at the centre of the earth?
- In nuclear reaction the change is chemical or physical?
- Which graph shows the relationship between F and r?
- What is the frequency of a wave that has a wave speed of 20 m/s and a wavelength of 0.50 m?
- How do you convert 182 bushels/acre to SI Units?
- On stretching a spring by a distance L it's potential energy increases by 10J.The energy required to further stretches it by a distance l,will be?
- What energy is there in a freely falling body ?
- An engine pulling four train cars sits on a frictionless track. Each car has a mass of 2.3 x 104 kg. How much force does the engine have to exert on the first car in order to get the train to move with an acceleration of 0.500m/s2?
- A golf ball of mass 200 g, initially at rest, is hit by a club. After the impact, the ball moves with a velocity of 45.0 m/s east. If the ball and club were in contact for 0.05 seconds, what is the average force acting on the ball?
- A ball is dropped from a balloon going up at a speed of 7 m/s. If the balloon was at a height of 60 m at the time of dropping the ball, how long will the ball take in reaching the ground and what will be its displacement ?
- A doctor has prescribed a corrective lens of power of positive 1.5 d. find the focal length of the lens .is the prescribed lens converging and diverging?
- A convert Len has a focal length of 12cm and an object 6cm tell is placed 18cm from the lens find the position, size and nature of the image formed?.
- Which colour of light has high speed in air?
- The dimension of planck's constant is equivalent to the dimension of which of the following quantities? A.force B.energy C.linear momentum D.angular momentum
- A car is speeding up on a horizontal road with an acceleration a. Consider the following situations in the car and answer?
- What is its velocity? What is its acceleration?
- Convert 150000000 km into light minutes?
- What is reversible isothermal change?
- What are Gs? And why do they increase with speed?
- An object of mass 3 kg moving with velocity 7 M per second is brought to rest in time 4 seconds find force?
- What is the magnitude of the average acceleration of the ball during this time interval? (Note: 1 ms = 10-3 s.)
- Calorimetry Question. How to solve it?
- Can someone help me with a few physics question ? with steps please !!
- A Jogger runs in a straighy line,with a magnitude of average velocity of 5.00m/s for 4.00minute and the with a magnitude of average velocity of 4.00m/s for 3.00minute. What is the magnitude of final displacement from her initial position?
- Prove that #"PV"^gamma="constant"#. ?
- If you weighed 110 pounds on Earth, how many pounds would you weigh on Jupiter?
- AND gate is formed by using two? 1)OR 2)NAND 3)NOT 4)NOR
- Why the amplitude is small in forced vibration?
- What happens when a transverse wave is reflected from the boundary of denser medium?of crest strike with medium ,it return as A)crest b)trough c)compression d)rarefaction e)not
- Name some Albert Einstein contributions in physics?
- Which wave source can travel through the vacuum of space?
- Physics help ??
- How much electrical energy is used by a 1000-watt microwave that runs for 30 minutes?
- What is the average speed of a car thra traveled 300.0 in 5.5hours?
- What type of motion is occurring when the slope of a distance vs. time graph is getting less steep?
- Two particles A and B start at O and travel in opposite direction along the circular path at constant speed #V_a = 0.7m/s# and #V_b = 1.5m/s# respectively. Determine the time when they collide(radius = 5m)?
- A hockey player applies an average force of 1.67 N to a 0.89 kg hockey puck for a time of 2.23 seconds. Determine the impulse experienced by the hockey puck?
- A ray of light is sent along the line x+y=1 after being reflected from the line y_x=1 it is again reflected from the line y=0 then the equation of the line representing the ray after second reflection may be given as?
- If Shlok stands 3 feet in front of a plane mirror how far from the person will her image be located.?
- Calculate the time of flight of a body which is thrown up to a height of 5 m from the ground ?
- The distance between two consecutive nodes of stationary wave is 25cm. If the velocity is 300m/s then calculate the frequency?
- After 2 seconds of flight,the velocity of a projectile is (12i-4j)m/s,Find its speed and elevation at moment of projection?
- A particle of mass 10kg is suspended by two strings that make an angle of 30° and 45° respectively with the horizontal. Find tensions in the strings?
- Derive a relation between Torque and Moment of Inertia?
- What is the spring constant of a spring that stretches a distance of 8.5 cm when a mass of 370 g is hung on it?
- One car travels 270 miles in the same amount of time it takes a second car traveling 6 miles per hour slower than the first to go 234 miles. What are the speeds of the cars?
- What is the difference between metric system and imperial system of measurements?
- What is her average speed over the entire trip? What is her average velocity over the entire trip?
- A 75.0 kg man pushes on a 500,000 ton wall for 250 s but it does not move. How much work does he do on the wall?
- The standing wave pattern in the graphic below has a frequency of 45 Hz.what is the period? At what frequency will you find the fourth harmonic? At what frequency will you find the fifth harmonic? How many nodes are in this wave pattern?
- 1 pts Anna Litical and Noah Formula are doing The Cart and the Brick Lab. They drop a brick on a 17.9 kg cart moving at 12.19 m/s. After the collision, the dropped brick and cart are moving together with a velocity of 5.71 m/s?
- What effect of mass on density?
- Three A,B,C are place on each other with A on top,B in mid and C at bottom.if weight of A is 2N,B is 5N and C is 4N.What is the total force exerted on B?
- A 0.6kg object is suspended from the ceiling at the end of a 2cm string. When pulled to the side and released, it has a speed of 4m/s at the lowest point of its path. What maximum angle does the string make with the vertical as the object swings up?
- Two similar billiard balls with initial equal velocities u1 and u2 of 10m/s respectively had an elastic collision .find the final velocities?
- A bowling ball traveling with constant speed hits the pins at the end of a bowling lane 16.5 m long. The bowler hears the sound of the ball hitting the pins 2.50s after the ball is released from his hands. What is the speed of the ball?
- What is the % change in frequency of a stretched string if the tension increased by 2%?
- A proton moving at 4.0 × 106 m / s through a magnetic field of 1.7T experiences a magnetic force of magnitude 8.2 × 10-13N What is the angle between the velocity of the proton and the field?
- Physics problem?
- If a 4.37-kg object experiences a 6.47-N force for a duration of 8.47-second, then what is the momentum change of the object?
- What would you conjecture about Raoul’s instantaneous velocity at t = 3s?
- If a projectile is thrown with a velocity of 19.6 m/s making angle of 30 with x axis then the time taken to reach the highest point is ?
- Normal force help?
- A car accelerates from 11.0 m/s at a rate of 1.50 m/s2. What is the velocity of the car after it covers a distance of 200.0 meters?
- When the frequency of a sound wave is increased, which of the following decrease? (1)amplituted (2)period (3)wavelength
- a hammer with a 1.5kg head is used to drive a nail into a wooden board if the hammerhead is moving at 3m/s when it strikes the nail and the nail moves 10mm into the board find the average force the hammerhead exerts on the naip?
- How to solve? Help please!
- What is the theory of relativity?
- How to find the torques?
- What is the frequency of a wave that has a wave speed of 80 m/s and a wavelength of 0.20 m?
- What is the wave speed of a wave that has a frequency of 50 Hz and a wavelength of 0.10 m?
- A block of wood is floating in a pool of water. One third of the block is above the surface of the water. Discuss the buoyant force that is acting on the log. Is the buoyant force greater than, less than or equal to the weight of the block?
- What is the wave speed of a wave that has a frequency of 100 Hz and a wavelength of 0.30 m?
- The pressure at the bottom of a lake due to 4.9× 10 power 4 Newton per metre square the depth of the lake is ?
- What is the difference between SHM and oscillatory motion?
- If voltage is doubled in ohm's law circuit. What is the effect on the resistance of the conductor?
- A catcher catches a baseball that is traveling 126km/h. If the ball stops within 0.230s, what is its acceleration?
- A #2.2 kg# block starts from rest on a rough inclined plane that makes an angle #25^@# with the horizontal. The coefficient of kinetic friction is #0.25#. As the block goes #2 m# down the plane, the mechanical energy of the Earth-block system changes by ?
- You kick a soccer ball with a speed of 12 m/s at an angle of 21. How long does it take the ball to reach the top of its trajectory?
- Difference between real and virtual image?
- What is the speed of the arrow when it leaves the bow?
- Assuming the earth to be a uniform spare of radius 6400km and density 5.5gm/cc. find the value of g on its surface?
- What are the units?
- Weather displacement is vector or scaler quantity ? (Provu it with refrences). Its my assignment question just need help from u guys
- Why the answer for (a) (i) is -Q and (ii) is +Q I am so confuse can anyone explain?thanks
- When you lift a book from the ground to your desk what kind of work do you do negative or positie? by lifting the book what do you change does the book gain or lose energy what kind of energy.
- A projectile of 5kg is projected at the angle of 60 with the horizontal with a speed of 40m/s What will be its K.E after 1sec?
- What is a real life connection to the law of conservation of matter?
- What is meant by thermodynamics ?
- Why was Thomson's model called a ball of positive charge?
- A 63 kg object needs to be lifted 7 meters in a matter of 5 seconds. Approximately how much horsepower is required to achieve this task?
- A 9.3 kg box is accelerating at a speed 0.85 m/s on a conveyor belt. What amount of force is necessary to stop the box from moving ?
- A flash buld with a potential energy difference of 4.5 V across it has a resistance of 8.0. How much current is in the bulb?
- When are the speed and velocity of this object increasing?
- A block of wood is floating in a pool of water. One third of the block is above the surface of the water. Is the volume of water displaced by the block greater than, less than or equal to the volume of the block?
- A particle of mass m strikes a wall at an angle of incidence 60° with velocity V elastically. Then the change in momentum is?
- What kind of electric charges moves through metals to form an electric current?
- On which interval is the object moving the fastest?
- A transmitting antenna at the top of the tower has height of 32m and height of receiving antenna is 50m. What is the minimum distance of satisfactory LOS of communication is? 1.40km 2.45km 3.60km 4.100km
- How much work is done if you lift a 3kg box 2 meters?
- What is the acceleration of an object at t=2?
- Can any1 help me in 11 phy question... The percentage error in the momentum is 100% Wt is the percentage error in the kinetic energy??
- Q. Poisson's ratio is ...............?
- A cricket batsman hits a ball at a speed of 27ms−127ms1 at an angle of 60∘60 to the horizontal. How far away would you have to stand in order to catch it (assuming you want to catch it just before it hits the ground)?
- What is the function of polaroid in respect to wave?
- A ball is dropped from the top of a tall building. It took 3.0 secs for the ball to hit the ground. The acceleration of gravity is g = 10 m/sec^2. The initial velocity was 0 m/sec. What was the ball's downward velocity?
- You kick a soccer ball with a speed of 12 m/s at an angle of 21. How long does it take the ball to reach the top of its trajectory?
- Can someone help me find horizontal and vertical displacement with an angle?
- A motorcycle is capable of accelerating at 5.1 m/s starting from rest how far can it travell in 1.5 sec?
- A baseball is thrown from a stadium seat and its path is shown by h(t)=-16t^2+75, where h is height in feet and t is time in seconds. A. How long before the ball hits the ground. Round to hundredths B. How high off the ground is the stadium seat?
- A boy on a 2kg skateboard initially at rest tosses an 8kg jug of water towards the right. If the jug has a speed of 3 m/s to the right and the boy and the skateboard move in the opposite direction at 0.60 m/s. What is the boys mass?
- Four wheels of different radii are connected with pulleys as shown below. Wheels 2 and 3 have a common axle. If the angular velocity of Wheel 2 is 2 revolutions per second, what is the angular velocity of Wheel 4?
- Why the gravitational force at the center of the earth is zero?
- A cart is loaded with a brick and pulled at constant speed along an inclined plane to the height of a seat top if the mass of the loaded cart is 3.0 kg and the height of the seat top is 0.45 meters, then what is the potential energy?
- If momentum is increased by 20% then kinetic energy increased by?
- An object of mass 5kg is moving with velocity 4m/s .A constant force of 20N acts on the object. What is the acceleration ?
- Physics question on surface tension and thermodynamics?
- Can you derive #E=mc^2# ?
- What is the net force acting on an object if two force act on it in the same direction?
- What happens to kinetic energy if mass is doubled?
- What is the velocity, and when is it moving forward?
- The voltage of primary and secondary coil of transformer is same?And current is same or not?
- A man walks up a stationary escalator in 90 seconds. When this man stands on a moving escalator, he goes up in 60 seconds. What is the time taken by the man to walk up the moving escalator?
- What will be the range if height is doubled and vice versa?
- Three forces act on a body. The magnitudes and directions are as follows : ? Force A = 94 N, 24° south of west. Force B = 70 N, 40° north of east. Force C = 110 N, 36° west of north.
- What property of a wave describes how often it occurs?
- What is the difference between strong force and weak force?
- Give example from everyday life in which an object’s acceleration is pointed upward and the object is a)speeding up and b) slowing down?
- An object is thrown downward with an initial velocity of 3 feet per second. The relationship between the distance s it travels and time t is given by s=3t+16t^2 . How long does it take the object to fall 70 feet?
- How can the resultant vector be used to analyze the magnitude of individual vector components?
- A tug of war contest involve seven-person teams pulling on a rope in opposite directions. Assume each player pulls with a force of 500 N . Determine the magnitude of the force that the rope exerts on each team?
- The position-time graph represents two walkers traveling in a constant direction. Which equation below best represents the average speed of the walker, Kin?
- Temperature of water with the mass of m1 and m2 equals, T1= 50°C and T2= 0°C. In which proportion, you need to mix 2 masses of water so in result you gain T3= 20°C? Which formula I should use?
- Two forces act on an object. Force A equals 13 Newton’s directed due east and force B equals 22 Newton’s due east. Draw and label a vector diagram ( including the resultant) and calculate the magnitude and direction of the resultant force?
- A small box of mass 10kg is being pulled by a rope inclined at 30° to the horizontal, along a rough horizontal ground. The particle is accelerating at 4/10 ms^(-2). The box is experiencing a frictional force of 12N. Determine the tension and normal?
- Explain using a sketch. 5. A bottle stands (1.5) m in front of a concave mirror which has a (50 ) cm focal length. a. Write down the properties of the image. b. Where should it be placed in order to obtain a magnified image?
- Is it correct that the potential difference in closed loop is zero? Why??
- A thin plate covers the triangular region bounded by the x-axis and the lines x=1 and y=2x in the first quadrant. The plate density at the point (x,y) is rho (x,y) = 6x+6y+6. find the plates, mass, first moment, centre of mass about the coordinate axes.?
- A cannonball shot upwards with a total velocity of 61.0 m/s at an angle of 45 degrees from the horizontal. What will the total velocity be when it has moved 345 m horizontally from where it started?
- A 1199 kg car is moving at 29.6m/s. what is the kinetic energy of the car?
- If a body is moving with constant acceleration of 10 m/s^² .If its cover distance S1 in first second and distance S2 in 2nd second. What is ratio S1 to S2 ?. a. S1=3(S2) c S1=S2 b. S2=3(S1)
- How can i derive newton's law of cooling?
- A speaker has frequency #120# Hz while two points along the horizontal (x) axis register a phase difference of #3# rad, what is the distance of these two points in meters?
- Two batteries of different emf and internal resistance connected in series with each other and with an external load resistor.current is 3A. when polarity of one battery is reversed current becames 1 A ratio of emf of two batteries is?
- Is revolution of Earth around sun a rotational motion ?
- Find the spring constant of the spring if a spring of length #2m# and mass is #82# grams, is stretched to a length of #2.8 m#. Its frequency is now #25 Hz# after it has been stretched?
- A boat is sailing due east parallel to the shoreline at speed of 10 miles per hour. At a given time, the bearing to a lighthouse is S 72° E, and 15 minutes later the bearing is S 66°. How do you find the distance from the boat to the lighthouse?
- Two blocks of masses 4kg and 2kg are attached to ends of a light spring having spring constant 1200 N/m. The whole system is placed on the smooth horizontal surface. When the spring is in relaxed state, the 4kg block is given velocity as shown below...”?”
- The position-time graph represents two walkers traveling in a constant direction. Which walker has a slower average velocity? Which aspects of the graph represents average velocity?
- Two points in the xy plane have Cartesian coordinates (2.00, - 4.00) m and (- 3.00, 3.00) m. Determine (a) the distance between these points and (b) their polar coordinates ?
- Explain: 1)Can you see a virtual image? 2)Can you photograph a virtual image? 3). Can you project a virtual image onto a screen? 4)Is it necessary to project a real image onto a screen to see it?
- You push a crate full of nooks across the floor at a constant speed of 0.5 meter per second. You then remove some of the books and push exactly the same as you did before. How does the crate’s motion differ, if at all?
- Force F=(10cos30)N is used to pull an object, friction force of (3N)is acting on that object which lies in horizontal rough surface.If the object is displaced by 2m,what is the work done by F?work done by (fric force)?work done by weight of object?
- Does amplitude change the frequency of waves?
- How heat travel in vacuum?
- What is physics? Please give me a standard definition.
- How much current is being supplied by the current source? What is the power absorbed by the conductor?
- What is the frequency of your dribbling if you bounce a ball 27 times in 20 seconds?
- Calculate the maximum work done during the expansion of 1 Mole of an ideal gas from volume 10 litres to 20 litres at 298 k given R = 8.314 j/k/mole?
- Can someone please help me with these questions???
- What is the net charge of a substance consisting of a combination of 8.2 × 1013 protons and 2.7×1013 electrons?
- A wire has length of #0.83m# and mass #0.005kg# and resonates at #215#Hz. What is the tension of the wire?
- What is the mechanical advantage of a ramp that is 9 m long and 3 m high?
- An ambulance approaches you while you are stationary. You hear a siren with a frequency of #540#Hz. Once he passes you and is going away from you the frequency is now #440#Hz. How fast was the ambulance going?
- Determine how many joules of energy are released when 870 g of aluminum is cooled from 155celsius to 20 celsius? please help
- What is mass?
- Physics Question?The rectangle shown in Figure P3.57 has sides parallel to the x and y axes. The position vectors of two corners are A = 10.0 m at 50.0° and B = 12.0 m at 24.0°.
- Negative values on Position vs Time Graphs and Velocity vs Time Graphs?
- You are in a desert on a hot day and see water in the distance. It is not really there, but results from refraction of light. What explains the behavior of the light waves?
- When the velocity and acceleration acts at same direction?!!
- What is the specific heat capacity at melting?
- Li is pedaling his bike with a force of 220 N. The combined mass of Reese and her bike is 55 kg. What is the acceleration of his bike?
- How does changing the resistance affects charging and discharging of a capacitor?.
- How to solve Motion Question?
- Establish a relationship between Momentum and kinetic energy of a body?
- The number of images formed when the angle between two mirrors is 24°is _________ ? (a)18 (b)20 (c)16 (d)14
- What is the current produced with a 9-volt battery through a resistance of 100 ohms?
- Two forces of 125 Newton’s and 215 Newton’s act on an object, as shown in the diagram. Calculate the magnitude and direction (including a specific angle θ) of the resultant force and the equilibrant force? THE DIAGRAM IN THE DETAILS
- A cell sends a current through a resistance R for time t. Now the same cell sends current through another resistance r for the same time. If same amount of heat is developed in both the resistance then the internal resistance of cell is?
- Three forces 3(i+3j+k), 5/7(-2i+9k) and 11(2i+j+6k) are acting on a particle .calculate the work done in displacing the particle from point (4,-1,1) to point (11,6,8).?
- The speed of light is approximately #3*10^8# #ms^-1#, how far does light travel in #6.0s#?
- In the cirsuit below solve for I1, I2 and I3?
- 3 resistors with values 6 ohm each are parallel with 24V supply, calculate the total resistance, and voltage drop along each branch?
- Wave Question?
- Solve for the currents through each resistor? And the voltages across each resistor? Including the each power?
- What are the branches of physics?
- A 10kg ham is thrown at 6m/s into a stationary 20kg shopping cart. How fast do they move together?
- (g) A sound wave travels at 330 m/sec and has a wavelength of 2.01 meters. what is the frequency and period?
- Give three examples to show that friction stops a moving object? Thanks
- A stone is dropped out of a balloon which is descending at #14.7 ms^-1# when the balloon is at an altitude of #49 m#. How long before the stone hits the ground?
- A stone is dropped from a helicopter which is rising steadily at #19.6ms^-1#. If the stone is released when the helicopter is at an altitude of #24.5m#, how long does it take for the stone to reach the ground?
- What is the displacement vector FROM the first plane TO the second plane, letting #hati# represent east, #hatj# north, and #hatk# up?
- Two equal vectors V and V' are added together. What are the possible values for the magnitude of the resultant vector?
- What is electric potential across a resistor if a resistance of #20# #ohms# draws a current of #6# #amperes#?
- How to calculate the distance between the first and third islands? (Physics)
- You are driving down the highway and a bug splatters on your windshield. Predict which is greater: the force of the bug on the windshield, or the force of the windshield on the bug? Explain your answer
- Won't fit into the question box?
- According to Coulomb's law, the electric force will be doubled if the separation of two equal charges is cut in half ? TRUE or FALSE ? Why?
- Physics word problem?
- Physics help question 4?
- Physics question help 2?
- Physics help question 5?
- A block of wood floats in water with 2/3 of its volume submerged. Its relative density is?
- A wave has a period of 1.93 seconds and a wavelength of 3.97 meters. What its frequency and speed?
- Physics help question3?
- On a force versus elongation graph, what is represented by the point where the slope of the best-fit line intercepts the x-axis?
- What are optical fibres used for in phone lines?
- Explain the use of capacitor in time delay circuits?What is its definition? I don want to go deep into it Just keep it simple Please just for a 10 class student
- A vector of magnitude 3 Cannot be added to a vector of magnitude 4,so whate is tha resultant magnitude?
- Physics help... there a few questions I need help with?
- An extension cord rated at 15A is connected to a 120V supply. What is the smallest resistance with which the cord can safely be used?
- A particle moves on a rough horizontal ground with some initial velocity v°.if ¾ of its KE is lost due to friction in time t° then find coefficient of friction between particle and ground?
- A kite 100ft above the ground moves horizontally at a speed of 8fts. At what rate is the angle between the string and the horizontal decreasing when 200ft of string have been let out?
- If a baseball player can throw a ball at 45° to a point 100m away horizontally to the initial vertical level, how high could he throw it vertically upward?
- If the light ray is incidented on a rectangular glass slab with an angle of 30 degree .If the refractice index of glass slab is root 3 what is the value of angle of devaition?
- Constant acceleration: Two particles P and Q have masses 0.5kg and 0.4kg respectively. The particles are attached to the ends of a light inextensible spring. [cont]...?
- A particle falls from rest under gravity. It's potential energy with respect to the ground and kinetic energy graph will be?
- A projectile is launched straight up at 141 m/s How fast is it moving at the top of its trajectory? Suppose it is launched upward at 45° above the horizontal plane. How fast is it moving at the top of its curved trajectory?
- The sound of thunder travels at a speed of 340 m/s and reaches you 2.5 s after you see a lightning flash. How far away is the lightning?
- Work done by electrostatic force of a system of fixed charges on a 10C charge in bringing it from some reference point to a point at A is 100J.Does 5hus imply that the potential at A is 10V?
- A swimming pool appears to be 9m deep by what percentage is the apparent depth smaller than the true depth? Refractive index of water is 4/3
- Clearly define instantaneous velocity and instantaneous acceleration?
- Lucy lightfoot stands with one foot on one bathroom scale and her other foot on a second bathroom scale. Each scale reads 350 N. what's Lucy's weight?
- Can anything travel faster than light?
- How to solve? What is different when switch is closed?Help!
- Two cars each have a mass of 1050 kg. lf the gravitational force between them is #2.27 times 10^-7# N, how far apart are they if G = #6.67 times 10^-11 # N*(m/kg)^2?
- A body is moving with a velocity v, breaks up into two equal parts.One of the part retraces back with velocity v. Then the velocity of the other part is ? :-
- The position of a ball tossed vertically upwards is described by the equation y=7t-4•9t² Where y is in metres and t is in seconds. Find 1) the initial speed v at t=0? 2) the velocity at t=2s? 3)the acceleration of the ball?
- Which colour has higher energy in visible spectrum physical science 10th class?
- Cite two examples in which you might think you are doing work but from the point of view of physics you are not doing so?
- What is echo?
- Modulation index is defined as : h= (Umax-umin)/(Umax+umin) Or h=M/A Please how can I determinate the value of M and A from the oscillogram???????
- Which lens has more converging ability among -1.0,+1.5,-0.75,+0.5?
- The figure on the left shows two objects of masses m1 and m2 travelling with velocities v1 and v2 toward a collision point (chosen at the origin)?
- Calculate the image produced by an object placed 30cm infront of concave mirror whose focal length is 20cm what is its magnification?
- Calculate the velocity of an elastic collision?
- How fast, and in which direction, must the person run to catch the ball at the level from which it was thrown?
- How do we know when Spring Force is negative or positive?
- Vectors Please Help ( What is the direction of vector A + vector B?)
- How does the force of an objetc affect the outcome? I need evidence to support it.
- What other two examples of daily life situations can demonstrate the transformation of heat into mechanical energy?
- Where did the sine function of the angle come from? The other accepted answer was P = F(average v) this I understand.
- Potenetial energy problem?
- Four wheels of different radii are connected with pulleys as shown below. Wheels #2 and #1 have a common axle. If the angular velocity of Wheel #2# is #2# revolutions per second, what is the angular velocity of Wheel #4#?
- A 3 hour river cruise goes 15 km upstream and then back again. The river has a current of 2 km an hour. What is the boat's speed and how long was the upstream journey?
- A wheel with a 18-inch is turning at the rate of 48 revolutions per minute. To the nearest diameter inch, what is the speed of a point on the rim in inches/min?
- A water falls is approximately 90m high. Assume that all of the potential energy possessed by the water at the top is completely converted to heat energy.What will be the temperature difference between the water at the top and at the bottom of the falls?
- What is the acceleration of a 0.5kg toy if Kim pulls it with a force of 30 N north, Jim pulls with a force of 30N South, and Tim pulls with a force of 15N east?
- A steel wire in a piano has a length of 0.7 m and a mass of 0.0043 kg. To what tension must this wire be stretched so that the fundamental vibration with frequency of 261.6 Hz?
- IF you have two objects with different masses collide hitting each other, will the force between them be the same or different when they hit?
- How do you calculate the resultant of the following vectors 4.0m/s and 10m/s with an angle of 90degrees between them?
- How do you calculate the resultant of the following vectors 4.0N and 10.0N with an angle of 0 degrees between them?
- Using newton's law of gravitation prove keplar's third law of planetary motion for circular orbits?
- 1: Calculate the work done on the crate by: - the 200 N force - the weight of the crate - the normal contact force N. 2: Calculate the rate of work done against the frictional force F. ?
- A 42-kg child slides from the top of a 3.0m high playground slide. With that speed will the child reach the bottom of the slide assuming: a.) there is no friction? b.) 23 J energy is dissipated due to friction?
- Is there any relationship between electrical and thermal conductivity? Thanks a lot!
- 50g of iron with a temperature of 90#C^o# into an insulated, non conducting container with 30.0ml of water at 20#C^o#. What is the new temperature of the mixture?
- How to resolve power of an object on inclined planes?
- The total uncertainty in the average value of many measurements can be calculated as?
- If we add the following numbers 72.1 + 3.41 + 0.003 then the answer will be ? A)75.1 b) 75.52 c) 75.53 d) 75.5 please explain.
- 2 ships X&Y are traveling in different directions at equal speed. the actual direction of motion of X is due North but to an observer on Y the apparent direction of motion of X is north east. the actual direction of motion of Y as observed from shore is?
- Subtraction of vector B from vector A, we use the following mathematical relation? a) A-B=A-B b) b) A-B=A+B c) A-B=A+(-B) d) A-B=A-(+B)
- The position of 2 bodies at any instant are represented by 2 points A(2,3,4) & b(5,6,7) from origin O. what is the distance between these bodies at that instant?
- An engine of 4.9 kW power is used to pump water from a well 20m deep. What quantity of water in kiloliters can it pump out in 30 min?
- The kinetic energy of a particle increases continuously with time . Then select correct alternative. ?
- A pump is installed on a ground takes 15 mi to fill a water tank of #30m^3# volume placed at a height of 50m. If the efficiency of pump is 30%, then what is the power consumed by the pump ?
- The particles in a wave are moving up and down in comparison to the ground. What best describes the wave producing this motion?
- A 4.0 kg box (A) is moving at 0.70 m/s to the right collides with an identical stationary box (B). Box B then moves at 0.50 m/s. What is the magnitude of momentum of box B after the collision?
- A machine gun of mass 12 kg fires 25g bullets at the rate of 4 bullets per sec with a velocity of 500 m/s. What force must be applied to the gun to hold it in [position?
- If the distance traveled by a body in the nth sec is given by(4 +6n) m, then find the initial velocity and acceleration of the body respectively?
- A body looses half of its velocity while penetrating 3cm into a wooden block, then how much will it penetrate more before coming to rest?
- Why is the neutral wire required? What would happen if the live wire completes the circuit?
- What does it mean if a beam is deflected in CRT when a magnet was brought close to it?
- What is application of function in real life of physics?
- How the speed depending on the height of inclination when a coin was rolled from the different heights of 5cm&15 cm ?
- A refrigerator has coefficient of performance 8 if the temperature in freezer is -23 degrees,what is the temperature at which it rejects heat?
- Find the vector cross product of two vectors C=2i-j and D=i+2j-3k (b) What is the angle between the vectors?
- Can you help with this?
- How do I answer this?
- A baseball hit with a vertical speed of 18m/s upward. What is the speed 2s later?
- Finding velocity when given magnitude and direction?
- Please find the total flux passing through the shaded region?
- Eleanor the Elephant performs a "hand" stand on a square box. Eleanor weighs 1.43 x 104 newtons and the sides of the box in contact with the floor measure 50 cm x 50 cm. What pressure does Eleanor exert on the floor in kPa (kiloPascals)?
- Initial height??
- An object has a constant acceleration #a = 4" m/s"^2#. Its velocity is #1" m/s"# at #t=0#,when it is at #x = 7" m"#. How fast is it moving when it is at #x=8" m"#? At what time is this?
- What is power equals work divided by time?
- Can somebody determine the point between these charges where the electric field force equals to zero? Thank you!
- A body weighs 900N on earth's surface. At a distance of twice earth radius above the earth's surface , the weight of the body is: *100N *200N *300N *450?
- How potential energy is equal to -dU/dx ?
- Define escape velocity and its expression?
- How (7i+3j-5k) *(i-j+k)=(2i+12j+10k?
- At what height above the earth surface the value of g is 1/2 of its value on earth surface.Given its radius 6400km.?
- Find the potential energy of a system of four particles.each of mass "m" place at the vertices of a square of side " l " also obtained the potential at the centre of the squqre?
- 5 cells each of EMF E and resistance r each are connected in series. If one cell is connected wrongly then potential difference across this cell will be?
- A wave of frequency 13000Hz travels 1300m in 4 second. What is the wavelength of the wave?
- Find torque of a force=(7i+3j-5k) about the origin. The force acts on a particle whose position vector is (i-j+k)?
- A bicycle wheel has an outside radius of 35.0 cm. If the bicycle is traveling at a speed of 30.0 km/h, what is the period of rotation of the wheel?
- A man of height 2m stands5m in front of large vertical plane mirror then the angle subtended at his eye by his image in the plane mirror is?
- What is the electric flux through each face if a charge Q is present in the edge of a Cube?
- What does Coulomb’s law look at?
- How much heat is needed to change 4g of water at 100-degree Celsius to steam at 100-degree celsius?
- Need help on this question?
- Find the net torque and angular acceleration of the bar?
- Acceleration vs time free fall graph?
- What is the different between a sharp knife and a blunt knife?
- A helium balloon containing 5m³ of gas at a pressure of 30kPa is released into the air. Assuming that the temperature is constant calculate the volume the balloon would have when the pressure inside the balloon has fallen to 5kPa. Answer in m³????
- Calculate the mass (in kg) of 54.3 m³ of granite. The density of granite is 2700kg/m³. Give your answer to 2 decimal places. ?
- A 10cm tall tablet computer is placed vertically 20cm from a plane mirror. its image distance was found to be 20cm. What is the height of the image of the computer? and what is the magnification of this image?
- What is the total distance of 1 seconds? in meters What is the total distance of 2 seconds? in meters Freely Falling Object
- What is gravitional force between two masses each of 100kg separated by a distance of 10m?
- A wheel originally rotating clockwise at 98 rad/s speeds up to 125 rad/s while turning through 628 radians. Assume a constant rate of acceleration. The wheel is 1.3m?
- A fully equiped astronaut weight 1500N on the surface of earth. If the astronaut has a wight of 555 N standing on the surface of Mars. What is the acceleration due to gravity on Mars?
- Why magnification is calculated?
- Write any two reasons of using SI system?
- A car is travelling 44 feet per second (30 miles/hour). What is the angular velocity of its 22 inch diameter wheels, in revolutions per minute?
- Explain the principle of conservation of linear momentum with reference to recoil of a gun?
- How much work is done by a person who uses a force of 40N to move a grocery cart 10M?
- A breaking force of 10 N applied for 5 seconds is applied to stop a 2.5 kg cart traveling at 20 m/s. What is the impulse exerted on the cart?
- What is the direction of the acceleration of G between the time t0 and the time t1 ? And that of the net resultant force ? Express the net force as a function of the other forces acting on the body (vector equality).
- What is the Kinetic Speed of 100-kg object that is moving 12.5 m/s?
- A flea jumps exerting a force of 1.02*10^5 N straight down on ground. A breeze blowing the flea parallel to the ground exerts a force of 1.14*10^6 N on the flea. What's the direction and magnitude of acceleration of the flea if its mass is 6.0*10^-7 kg?
- An airplane flies 750 miles due west in 1.5 hours and 750 miles due south in 2 hours. What is the overall average speed of the airplane?
- My teacher gave us a paper and said we have to use " matter " in a sentence. How do I use the physics term of matter in a sentence?
- How do i find the acceleration of a cylinder's center of mass while it is on a incline ramp? It starts initially at the top of the ramp and slides down the ramp
- If A=(8,15),find the magnitude and direction of A?
- A ball is dropped from the top of a building 25m high. How much time will the ball need to reach the ground?
- Let be two vectors #a = 2i + λj + k# and #b = 4i - 2j-2k#. Find the value of #λ#, so that vectors to be vertical?
- A ray of light is incident normally on an equilateral prism (refractive index 3/2).the deviation of light Ray?
- A 18kg block rests on a horizontal plane with a force of 80N at 40deg. The coeffection friction between the block and plane is 0.23. What is the, Normal reaction? The friction force? and acceleration of the block?
- Positive charge glass rod is brought near uncharged gold leaf electroscope.the leaves diverge.which is the answer?
- A pendulum bulb has its maximum speed as 3m/s at the west position 0. calculate the height of the ball above 0 where velocity is 0?
- Ples help me?????????
- Show that maximum horizontal range of a projectie is four times the corresponding maximum height?
- What is the effect of non sphericity of the earth on the value of g?
- A wave travelling in the positive X direction is represented by the equation Y=0.45sin(ax+bt), where x is in meters and t in seconds. Calculate the wave speed?
- A delivery bike travels 14 m. North, 23 m. East, and 27 m. South. What is the final displacement from the origin(magnitude and direction )?
- How to crack this SAT problem? Seem's more like physics to me than mathematics. Thanks :)
- A particle is moving with a velocity of 10 m/s towards east.After 10s its velocity changes to 10 m/s towards north.Its average accelaration is ?
- A small ball rolls horizontally off the edge of a tabletop that is 1.20 m high. It strikes the floor at a point I.52 m horizontally from the table edge. (a) How long is the ball in the air? (b) What is its speed at the instant it leaves the table?
- We learned that g=10 m/s2 but in the next chapter they told that it changes with altitude what's the phenomena here?
- If there are three pendulums having three balloons attached to each string one balloon is fully filled with water one half filled and the last one is empty why is their time period is different?
- A small metal sphere of mass 50gm is suspended by a light string.As it oscillates the sphere is 1.75m from the ground at its highest point and 0.75m at its lowest point what is the maximum speed and momentum?
- Physics Question?
- What is the acceleration of the car whose speed increases uniformly from15m/s to 25m/s in 5s ?
- What is the mass in kg of a particle traveling at 171 m/s if it has a wavelength of 2.51x10-38m?
- A plane its off speed of 83m/s. a plane accelerates uniformly down the runway for 25 sec. what is the acceleration of plane during this time?
- A car starts form rest and accelerates uniformly for 6.75 seconds. if the car travels 125 meter druring this time, what is the acceleration of the car?
- You are launching a 2-kg potato out of a potato cannon. The cannon is 1.5 m long and is aimed 30 degrees above the horizontal. It exerts a 50 N force on the potato. What is the kinetic energy of the potato as it leaves the muzzle of the potato cannon?
- ____ of DC motor reverses the direction of current through the coil every half cycle? Options (a) the brushes (b) the commutator (c) the armature (d) the split rings
- A ball is thrown off a building of height 2 metres at the horizontal velocity of 10m/s. If a boy is 10 m away from the bottom of the building. Would that ball hit him?
- A bicycle racer rides from a starting point to a turnaround marker at 10 m/s. She then rides the same route from the turnaround marker to the starting point at 16 m/s. (a) What is her average speed for the whole race? (b) What is her average velocity?
- Why is the moon's pull greater than the sun's?
- Two charges and 2.0 C and 13 C are placed 4.0 m apart. What is the force between these charges?
- Mass of an object is 20kg.find its weight on earth and moon .if (g on earth =9.8 m/s^2)(g on moon =1.6m/s^2)?
- A 750kg car moving at 23m/s brakes to a stop. The brakes contain about 15.0kg of iron that absorbs the energy. What is the increase in temperature of the brakes? (HINT: KEcar=Qbrakes) (ANSWER: 30 degrees Celsius)
- What does a position vs time graph look like if I have this as my Force vs time? (image included)
- Please Answer?
- What is the principle of working of rocket?
- Show that the path of projectile projected at an angle of THITA from horrizontal is parabolic in shape?
- A toy boat floats on water and has a mass of 250 grams. What is the lowest volume possible that the boat can have before it sinks?
- Given a force of #56" N"# and an acceleration of #7" m/s"^2#, what is the mass?
- How can the conversion from potential energy to kinetic energy provide energy that is useful to people?
- Throw a 15kg rock by applying a force of 300N up over .8 seconds. what is the rocks change in momentum?
- A horizontal rifle is fired at a bull's-eye. The muzzle speed of the bullet is 657 m/s. The gun is pointed directly at the center of the bull's-eye......?
- A person of mass #m# is standing on one end of a plank of mass #M# and length #L# and floating in water The person moves from one end to another and stops. What is the displacement of the plank?
- If vectors #vecA=cos(omegat)hati +sin(omegat)hatj# and #vecB=cos((omegat)/2)hati+sin((omegat)/2)hatj# are functions of time, then the value of t at which they are orthogonal to each other is?
- A skateboarder shoots off a ramp with a velocity of 6.9 m/s, directed at an angle of 62° above the horizo.......?
- The angle between two forceses of equal magnitude such the resultant force is 1/3 the other force?
- An airplane with a speed of 53.6 m/s is climbing upward at an angle.....?
- Two forces of 3 N and 4 N act on a body simultaneously and the forces are perpendicular to each other. What is the net force on the body?
- How does energy move by means of a wave?
- In a circuit there’s a resistance (R). I want prove that #1/R=1/R_1+1/R_2#. ??Thanks 😊
- Discuss how the Bohr Model was able to explain the line spectrum that the Rutherford model could not?
- A hot-air balloon is rising straight up with a speed of 3.8 m/s. A ballast bag is released from rest relative to the balloon at 9 m above the ground. How much time elapses before the ballast bag hits the ground?
- A dolphin leaps out of the water at an angle of 43° above the horizontal. The horizontal component of the dolphin's velocity is 6.6 m/s. Find the magnitude of the vertical component of the velocity?
- Explain why a variable resistor is used in the circuit instead of a fixed circuit?
- If a mass of a body is reduced to half and velocity of a body is double.How does its kinetic energy changes?
- Graphical variation between angular frequency and wave number with explanation?
- Physics electric field?
- An airplane has an airspeed of 500kph bearing 60 degrees. The wind velocity is 60kph bearing 125 degrees. Find the resultant vector representing the path of the plane relative to the ground. What is the ground speed of the plane?
- Ten identical cells connected in series are needed to heat a wire of length 1 m and radius r by 10°C in time t. How many cells will be required to heat the wire of length 2 m of same radius by the same temperature in time t??
- A horizontal force of 0.9 newton act on a body of mass 0.1kg.there is a resistance of 0.15 newton opposing the firs force what acceleration would produced??
- The sum of the two point charges is 7microCoulomb. They repel each other with a force of 1N when kept 30cm apart in free space. Calculate the value of each charge?
- If the x component of a vector a ,in the xy plane , is half as large as he magnitude of the vector , find the tangent of the angle between the vector and the x axis ?
- Does a diffraction pattern appear with a single slit if the intensity of light is turned down so low that only one photon is traveling through the slit at a time?
- What does the slope represent in a plot of acceleration versus position in an oscillating spring-mass system?
- Find angle e for which a light ray incident at angle 60° on the horizontal mirror becomes vertical after two successive reflections at the shown plane mirrors. Draw ray diagram for the event. (0 is angle between plane mirror)?
- A potentiometer consist of a wire of length 4 m and resistance 10 ohm. It is connected to a cell of emf 2 V . The potential difference per unit length of the wire will be? 1) 5 V/m 2) 2 V/m 3) 0.5 V/m 4) 10 V/m
- Application of superposition of waves.?
- A balloon rubbed against denim gains a charge of -8µC. What is the electric force between the balloon and the denim when the two are separated by a distance of 5.0cm? (Assume that the charges are located at a point)
- What is the mirror used in car head lights? where should We keep the bulb to get parallel light rays?
- In silver electroplating, what makes the silver sons stuck to the cathode?
- A car starting from rest on a straight line road accelerates at a constant rate of 4 m/s -2 for 7 seconds. How far does the car travel during this time?
- What is electromagnetic radiation?
- How do you find the centre of motion of a particle moving in simple harmonic motion of period 8hrs and amplitude 6m. When t=3hrs and x=4m?
- A car traveling initially at +7.8 m/s accelerates uniformly at the rate of +0.88 m/s2 for a distance of 249 m. What is its velocity at the end of the accelration? answer in units of m/s
- A toy rocket is driven vertically upwards from the origin at rest, and it rises with an acceleration of #a=(9-5t)g ms^-2# for the first 2 secs and thereafter an acceleration of #a=-g ms^-2#. How to find the max speed and max height reached?
- If the mass of the body is increased to double , and the momentum decreases to half, so the velocity?
- A child id pushing a shopping cart at a speed of 1.5 m/s. How long will it take this child to push the cart down an aisle with a length of 9.3 m? (Record your answer to the nearest tenth of a second, do not use units.)
- How can energy be converted between potential and kinetic?
- Two forces of the 6N and 8N act at a point at an angle of 90 degrees with each other.?Determine the magnitude of the resultant forces
- How many kinetic energy is possessed by a 3.5 kilograms cart traveling at 2.5 meters per second?
- What are the examples of static electricity??
- A bird of mass 1g flying with velocity of 0.5m/s find power?
- The velocity of car changes from 36km/hr to 72km/hr in10 sec What is its acceleration?
- A girl moves along the boundary of a square field of side 20m in 80 secs. what will be the magnitude of displacement at the end of 200 secs? also calculate average velocity
- Write the relationship between g and G and explain the terms?
- How can I wire a bulb having two resistance wires that will double the amps?
- In Aesop’s fable of the tortoise and the hare, the faster hare loses the race to the slow and steady tortoise. During the race, which animal has the greater average speed?
- A proton passes through a potential difference of 350 V. Find it's kinetic energy and velocity. What's wrong with my work?
- Why is shallow water more dense than deep water? Shouldn’t it be the opposite?
- Distance/time/velocity question pls help?
- What is the structure of a wave, including its high and low points?
- Calculate the energy released in eV, when 1 alpha particle is emitted?
- The speed of light is 300,000 km/s. How far is 1 light year in km? In miles?
- How we can Drive kinetic equation for x(t) v(t) via integration?
- How does the tension of string affect the period of a pendulum?
- Steven, a bungee jumper, steps from a high bridge and falls freely for 2.5 s after which the bungee cord begins to exert an upward force. Ignore the effects of air resistance. a. Calculate the distance Steven falls during the first 2.5 seconds?
- A baseball is released at rest from the top of the Washington Monument. It hits the ground after falling for 6.0 s. What was the height from which the ball was dropped? (assume air resistance is negligible)?
- On what factor the pitch of sound depend?
- Find angle THETHA for which a light ray incident at angle 60° on the horizontal mirror becomes vertical after two successive reflections at the shown plane mirrors. Draw ray diagram for the event. (0 is angle between plane mirror)?
- Mention an expression for the period of oscillations of a spring and explain the terms?
- Why do we use meters per seconds when calculating?
- Calculate the velocity of a water wave if it’s frequency is 5hz and the wavelength is 12 m?
- Maricar walks 80km E, 5km S, and finally 6km 15 N of E, Find her displacement by component method?
- An object of 2 cm tall is placed 15cm from concave mirror of focal length 10 cm. How far is the image from the mirror?
- Explain non linear and non linear relationship? Thanks
- The electric force between two charges placed in air is 2 newton. When placed in a medium of €r= 80,the force reduced is what?
- How do I solve this word problem?
- A traveler first drives 22.0 km east, then 28.8 km southeast, and finally 10.9 km south. Find the traveler's total displacement. magnitude? direction south of east ?
- A stone is dropped from a cliff room 200m high, if a second stone is thrown vertically upward 1.5sec after the first was released strike the base of the cliff at the same instant as the first stone with what velocity was the second stone thrown?
- Automobile traveling at 56km/hr is 35m from a barrier when the driver slams on the brake. Four seconds later the car hits the barrier, what was the automobile deceleration before the impact? How fast was the car traveling at impact?
- An ultracentrifuge accelerates from rest to 100,000 rpm in 2.30 min. (c) What is the radial acceleration of this point at full rpm? (d) Express this radial acceleration as a multiple of g.
- A certain particle moves along the x-axis shown in the eqn #t=2x^2-5x+3# where x is measured in cm and t in seconds. Initially, the particle is 1.5cm to the right of the origin. How do you prove the velocity v cm/s is given by #v=1/(4x-5)#?
- How can you explain the fact that light travels in a straight line yet bend fiber-optic still transmits light to the end?
- Physics Motion Problem Help !?
- Why is normal force acting down in a circular motion when the object is at top of the circle?
- A raindrop acquires a negative charge of #3.0 times 10^16# #C# as it falls. What is the force of attraction when the raindrop is #0.6# #m# from the antenna ball that holds a charge of #2.0 times 10^-6# #C#?
- What role, if any, does air resistance have on your results? Explain your the reasoning
- What is the difference between a series circuit and a parallel circuit?
- How much gravitational energy would a 5 kg box have held 2.3 m above the ground?
- If you're pushing 250kg up at 10% incline, how much weight are you pushing?
- What is the difference between an open circuit and a closed circuit?
- Obtain a Relation for the velocity of uniformly accelerated body after it has made a certain displacement?
- A mass undergoes SHM with amplitude of 4 cm. The energy is 8.0 J at this time. The mass is cut in half, and the system is again set in motion with amplitude 4.0 cm. What is the energy of the system now?
- Volume of a body decreased three times and its mass increased for 20% of its original value. Find how much the density of the object increased or decreased?
- Determine force F?
- A particle perform SHM of amplitudw 20cm and has maximum velocity 200cm/s.what is its displacment when velocity is 120cm/s?
- What is the net force (magnitude and direction) on the electron moving in the magnetic field in figure below if B=2T; v= 4 x 10^4 m/s; #theta#=30°?
- A force is it mass ,weight or both ?
- Is a uniform circular motion is a case of accelerated motion?
- What is the wavelength of a water if it’s frequency is 5 hz and it’s velocity is 35 m/s?
- How do I convert m/s to km or km/h?
- One problem on physics, center of mass?
- A 24-kg wagon accelerates on a horizontal surface at 0.5 m/s2 when pulled by a rope exerting a 120-N force on the wagon at an angle of 25∘ above the horizontal?
- A particle is going following an equation of a=20t-6t^2 (a in m/s^2) Find when will it have the maximum acceleration value?
- One car is travelling along a straight road at 60km/h while another car is travelling around a circular track at 60km/h. Are they travelling with the same velocity? If not, why?
- Is it possible for a runner, after covering a distance of 5km , to have a displacement of zero ? Why ?
- What is difference between mass and weight. In general and scientific Defination?
- The driver of a car is initially moving at a constant speed of 76.0 km/h when a traffic light turns red. If a 0.455 s reaction time is required before the brakes can be applied, what is the distance in meters traveled by the car before it begins to slow?
- Why does (second) 2 occurs in the unit of acceleration?
- You are bouncing on a trampoline while holding a bowling ball. As your feet leave the trampoline, you let go of the bowling ball. Do you rise to a higher, the same, or a lower height than if you had held on to the bowling ball?
- Compute the average speed in m/s of a runner who completes a mile in 3.68 min.?
- A stone is thrown straight down from the top of a cliff with an initial velocity of 6.0 m/s. It reaches the bottom in 3.0 s. If it accelerates downward at 9.81 m/s 2 , how tall is the cliff?
- Car travels from point A to point B at a constant speed of 75 km/hr. They then return to A from B at a constant speed of 65 km/hr. What is the average velocity ?
- What is the frequency in hz of green light of wavelength 500nm (500×10(-9))? (-9 is an exponent)
- A particle moves from position (3i+2j-6k) to another position (4i+3j-4k) in metre unit when a constant force of (4i+2j+4k)newton acts on it.calculate the work done by the force and the angle between the displacement and force?
- A Big Mac contains 550 calories . If there are 4,184 joules in a 1 calorie, how many joules of energy are in a Big Mac?
- The kinetic energy of a ball is equal to __? A.the work transferred to the ball that causes the ball to accelerate from rest B. the mass size of the ball C. the balanced force that does not accelerate it D.the velocity of the ball as it travels upward
- A roller coaster car is going 27 m/s when it reaches the base of a big drop. If it got all of its speed by rolling downhill, how high was the hill where the roller coaster started?
- What aspects of a wave change with a change in amplitude?
- Why can rechargeable batteries only be recharged a certain amount of times?
- Stabliser,Invertor and Generator what's the difference among these three?
- A car rounds a 200 m -radius curve at 11.5 m/s If the horizontal force acting on the car is 790 N, what's the car's mass?
- A car is going from one city to another city by travelling 75km north 60√2km north east and 60km east.the minimun distance between the two cities is?
- A gust of wind blows an apple from a tree. As the apple falls, the gravitational force on the apple is 2.25 N downward, and the force of the wind on the apple is 1.05 N to the right. Find the magnitude and direction of the net force on the apple?
- A particle of mass 10kg is placed in potential field given by #V = (50x^2 + 100)# erg/g. What will be frequency of oscillation of particle ?
- Why does a sprinter running in a 200 m event lean towards the centre of the curve he is rounding?
- A particle execute S.H.M with frequency f. Find frequency with which its kinetic energy oscillates?
- An archer fires an arrow with a velocity of 42 m/s at an angle of 35 degrees above horizontal?
- Given that the ring R is in equilibrium, use a labelled vector triangle to determine the tension X ?
- Find the resultant force of W and P?
- An object is projected vertically up from the top of a tower of height 58.8 m with an initial velocity 4.9 ms–1. Calculate the time of flight of the object. (1) 2 s (2) 4 s (3) 6 s (4) 8 s?
- How so can enter the answer here ? For the perpendicular
- A ball is dropped from a height of 100 m at t = 0. Later, at t = 1.00 s, a second ball is thrown downward with a speed of 19.8 m/s. At what time will the two balls be at the same height?
- A runner achieves a velocity of 11.1m/s, 9 sec after he begins. What distance did he cover?
- Help me to solve the interesting fact ?
- Gloria is designing an experiment to investigate how different kinds of wheels accelerate down a ramp. Which is the dependent variable?
- In a double silt experiment ,the slits separation is d=0.1mm and the pattern was observed on screen at distance D=1m the separation distance between two adjacent fringes for wavelength 500nm?
- A worker lifts a 40 kg heavy box from the ground and puts it on the horizontal frictionaless surface table 1.5 m high from the ground. Then he pushes the box on the table. The velocity of the box changes from 5 m/s to 2 m/s?
- Find the focal length and power of a convex Lens which when placed in contact with concave lens of focal length of 25 cm forms a real image five time the size of object placed 20 cm from the combination?
- How do you derive #g=(Gm)/r^2# and #V=-(Gm)/r#?
- What is the relation between 1kwh and joule?
- When bus stop we fall back our upper part of body which is according to gravity law. So is there any gravity force on upper part of body?
- Find the radius of the mirror if the focal length of mirror -40 ?
- State how does the time period of a simple pendulum depends on a mass of a bob?
- Any two reason of using S.I system?
- A particle p moves in a straight line the acceleration of p at time #t# second after starting from the point O on the line is #x ms^-2# where #x=3/2t^(1/2)# given that the velocity of P at o is #2ms^-1# find its velocity when #t=4#?
- The acceleration of particle P is moving in a straight line eqn a = 3x(x-4) where x(m) is the displacement from origin O and t is time in secs. Initially, the particle is at O and its velocity is #4sqrt(2)# m/s. How to prove that #v^2=2(x^3-6x^2+16)#?
- An airplane starts at rest on a runway. It accelerates at #4.44 m/s^2#, and travels 738 m before taking off. How long did it take?
- A horizontal plate with a particle resting on it is made to oscillate vertically with simple harmonic motion through a distance of 2 ft. What is the smallest number of vibrations per minute that will throw the particle off the plate?
- The speed of a motorcycle increases from 10 km/hr to 50 km/hr in 9 seconds. What is its acceleration?
- A 9 kg ball starts at the top of a 84 m high building. How much kinetic energy does it have three-quarters of the way to the ground?
- If the surface density of charge be sigma, the electric field near the surface would be...? 1) #(2sigma)/(epsilon_0)# 2) #(sigma)/(epsilon_0)# 3) #(sigma)/(2epsilon_0)# 4) #(3sigma)/(2epsilon_0)#
- A solar cell generates a potential difference of 0.11 V when a 400 Ω resistor is connected across it, and a potential difference of 0.14 V when a 710 Ω resistor is substituted. What are the (a) internal resistance and (b) emf of the solar cell?
- State and prove Pascal's law in mathematics?
- How to find rms value from the given resultant current?
- Electron +nuetron+ proton=?
- Is work done by magnetic forces is always zero ?
- How much energy is needed to pop a kernel of popcorn?
- A particle is moving along a straight line and the acceleration is given by a(t)=3t+5, (units m/s2). a)Find v(t) , the velocity at time t if the initial velocity is v(0) = -4 ft/s? b)Find the total distance traveled during the time interval [0, 2]?
- What is the first overtone frequency for an organ pipe 2.00 m in length, closed at one end?
- Why is a cork able to float on water?
- Determine the work produced by applying 80 N of force to a 25kg block 25 degrees from parallel. the distance the box moves is 1.5m?
- A railway carriage of mass 10000kg moving with a speed 15/s hits a stationary carriage of same mass. after the collision the carriage get coupled and ove together. what is their common velocity after collision?
- What motion takes place in opening the door?
- One mole of an ideal gas at temperature T1 expends according to the law P/V*2=constant the work fone by the gas till temperature of gas becomes T2?
- Thermometer s sensitivity ?
- When sunlight is scattered by atmosphere atoms and molecules,the amount of scattering of light of wavelength 440nm is A.the amount of scattering for the light of wavelength 660nm is .? a) 4/9A b)2.25A c)1.5A d)0.66A e)A/5
- How much thermal energy is required to raise the temperature of a 0.75 kg piece of copper pipe by 10 ∘C ?
- A ball dropped from a window strikes the ground 2.73 seconds later. How high is the window above the ground?
- Why we cannot feel the motion of earth?
- At what condition the magnitude of speed is equal to the velocity of a moving body?
- A uniformly accelerated car started from rest and IA accelerated 3km–²,calculate the time it takes for the car to cover24km from starting point?
- Which of the following is the image of the number in the mirror?
- An object traveling in a circle at constant speed of radius 18m and complete one revolution in 6 secs determine object speed?
- How is radioactive decay random and still have a half life?
- Moments q. Could someone pls show me a better way to solve part c?
- Draw a diagram to show the torque exerting by a force that acts at a distance, from the origin and write the formula of the torque?
- Help needed Urgently! can someone help please?
- When a source of sound of frequency 600 Hz moves with velocity 30 m/s towards a stationary observe, the apparent wavelength is λ. If the same source is kept stationary and the observer is moved with same velocity 30 m/s towards the source,........?
- How will the diffraction pattern change of the wavelength of light is increased?
- Bob is riding the giant drop at flags of America. If Bob free falls for 2.0 seconds, what will be his final velocity and how far will he fall?
- Calculate the amount of heat required to raise the temperature of 25gm of water through 30°C???given specific heat of water is 4200J/kg/K
- Why does the binding energy per nucleon increase during nuclear fission and nuclear fusion?
- A mass of 9.1 kg is placed on a incline with friction. The coefficient static friction is 1.22 and the coefficient of kinetic friction is 0.5. If the angle of inclination of the incline is 39.2 degrees, what is the acceleration of the mass in #m/s^2#?
- What happens to the pitch if the amplitude increases?
- How is Total Internal Reflection used in Bicycle reflectors?
- A charge of 10 micro Coulomb and 14.4 micro coulomb are 12 cm apart, the force between them is what?
- A merry go round revolve in a circle with 20 rad/s for 2 minutes. its average and instantaneous velocities respectively area a) 20rad/s , 10rad/s b) 20rad/s , 20rad/min c)20rad/min, 20 rad/sec D) 20rad/sec , 20rad/sec ??? please with explanation ..
- 4. The figures below shows rays of light entering and leaving the optical boxes. Each box contains two plane mirrors. Show how they are placed?
- A #10# #kg# block is hanging from #2# ropes. One exerts a #50# #N# force at a #15^{\circ}# angle. The other exerts a #95# #N# force at a #60^{\circ}# angle. Find the direction and the magnitude of the force that will bring the block into equilibrium?
- How cranes are able to lift very heavy load without toppling?
- A refrigerator operators on average for 12 hours a day. If the power rating of the fridge is 600 W, how much electrical energy does the fridge use in one week, in joules and kWh?
- You hike up a hill at 4 km/h. You hike down at 6 km/h. Your hiking trip took 3 hours. How much time did it take you to hike up the hill?
- Why in electrostatics distance from dipole is always calculated from the centre of dipole? Thank u for answering
- A boat is floating on a small lake. The crew from the boat lifts a log floating nearby and loads it into the boat. What would happen to the water level in the lake (relative to the shore)? Is it going up or down or is it staying the same? Please, explain.
- What is the change in internal energy if 20 J of heat is released from a system and the system does 60 J of work on the surroundings?
- How does the spectrum of a star change as it passes through a cool cloud of gas?
- A car travels 300m north and then 400m west. The car takes 2 minutes to complete the journey. Calculate the magnitude of the displacement of the car from its starting position?
- The displacement of a particle is given by S = a+b t+ct^2 deduce the dimensions of the constants,a,b,and c appearing in the equation?
- A room has relative humidity of #20%# at #20# degrees Celsius with dimensions #3m \times 3m \times 2.7m#. Determine the amount of water vapour in grams and liters that must be added to the air of the room in order to raise the relative humidity to #60%#?
- You can keep a 3 kg book from falling to the ground by placing it on a horizontal surface. What reaction force is resisting the force of the book on the surface?
- How the experimental mass of neutrino is caluclated as it wont intereact with any type of matter?
- In SHM displacement is half of the amplitude. What fraction of the total energy its kinetic energy?
- Which of the figure below is the image of the arrow in a plane mirror?
- Stuck with physics ?
- A particle moves along a straight line with velocity given by #v(t) = 7 - (1.01)^(-t^2)# at time #t>=0#. What is the acceleration of the particle at time #t = 3#?
- A cat pushes a ball from a 7.00 m high window, giving it a horizontal velocity of 0.20 m/s. How far from the base of the building does the ball land?
- If the force (at 90∘ to the lever arm) applied is 15 N and it is applied at 2.0 m from the pivot point (point of rotation), what is the torque on the lever?
- The sun is 8.3 light minutes away from the earth? explain?
- What is velocity?
- What is the magnifying power of 12 diopter of lens?
- How many electrons in 1 coulomb of charge?
- An elevator can carry a maximum load of 1800kg, is moving up with a constant speed of 2m/s. The frictional force opposing the motion is 4000N. Determine the minimum power delivered by the motor to the elevator in watts?
- A ray of light incident at an angle of 40°prism of refracting angle 60°is deviated through an angle 38°.calculate angle of emergence?
- A 2.00kg. toy accelerates from rest to 3.00 m/s in 8.00s on a rough surface of mk=0.300. find the applied force F?
- If the coefficient of friction between the tires of a car and the road is 0.300, what is the stoping distance of a car ttaveling a 60.0 mph?
- A vertical solenoid has 200 turns in a length of 0.4m and carries a current of 3A in anticlock wise direction.the flux density in the middle is about ?
- A ray of light incident on a plane mirror at an angle of #20^o# with the horizontal as shown. If after reflection, the ray of light goes vertically downwards then the angle of inclination of the plane mirror with the horizontal line is?
- What is defference betwen coil and resistor?
- Dimensional representation of coefficient of friction is???
- If h be the height due the velocity v at the earth surface corresponding height H when the variation of gravity is taken into account prove that #1/h=1/H+1/r#where r is earth radius. ?
- Define magnatic field?
- The maximum deceleration of a car is 15 m/s squared the car travels at 200 km/h. Calculate: the time it will take th car to come to rest?
- A speed skater is traveling 9 meters per second on smooth ice and then hits a 5.9 meter patch of rough ice and gradually slows to 5.6 meters per second. What is the rate of acceleration on the rough ice? Thanks
- How to find tension between two blocks, in terms of acceleration?
- The helium atom has two neutrons and two protons in its nucleus, and it has two electrons outside its nucleus. Which force keeps a helium atom from disintegrating into two neutrons and two hydrogen atoms?
- A person stands in front of a plane mirror at a distance of 1m.then what is the distance of the person and his image in the mirror?
- A meteoroid changed velocity from 10 km/s to 1.8 km/s in 0.03 seconds. What is the acceleration of the meteoroid?
- I need answer of this question? . plz help me
- A 12.0 cm3 sample of gas is kept at a pressure of 45.0 Pa. If the temperature remains constant, what will the volume of the sample be if the pressure is reduced to 5.00 Pa?
- Light is a form of _____?
- What kind of energy changes take place when you dive off a diving board?
- The power, P, developed in a resistor R by battery of emf E and the internal resistance r is given by P=E^(2)R/(R+r)^2 Differentiate P with respect to R and show that the power is a maximum when R=r ?
- How is force described?
- The voltage drop, v volts, across an inductor L henrys at time t seconds is given by v=225e^-Rt/L, where R=250Ω and L=15x10^-3 H. Determine: a) The voltage when t=180µs ? b) The time for the voltage to reach 115v ?
- How high above the ground is a ball with a mass of 2 kg that has a GPE of 70 J?
- If she long jumps from the edge of the left bank at 45° with the speed calculated in (a), how long or short of the opposite bank will she land?
- An automobile travels 200km due east and then 150km 60 degree moth of east . Determine the resultant displacement ?
- A positively charged rod is brought near to a compass needle what will be the effect on the needle A postively charged rod is slowly moved towards a compass needle what will be the effect on the needle?
- How is energy stored and released in coal?
- Two concurrent forces have a maximum resultant of 45 N and minimum resultant of 5 N. What is the magnitude of each of these forces?
- Finding the coordinates a vector turns 90 degrees to reach the final point?
- 5. to see the ball from the openings K.L and M indicate where the plane mirrors should be located in the tubes?
- A fully loaded Boeing Aircraft has mass of 3.3×10^5 kg.It total wing area is 500m^2.It's in level with a speed of 900kmph.Estimate the pressure difference between the upper wing and lower wing?
- A plane lands with a velocity of +113.6 m/s and decelerates at a maximum rate of 6.0 m/s2 . From the instant the plane touches the runway, what is the minimum time needed before it can come to rest? Answer in units of s.
- If the speed of an object is increased by 4 times what will happen to the kinetic energy of an object its mass remain constant.?
- 20kg of water Convert from 15’c to 95’c How much heat is required to convert?
- 3. which letter shows the angle of incidence in the figure ? A) A B) b C) c D) d
- 4. Which of the following is the angle of reflection for the light ray given in the figure? A) 70º B) 60 º C) 35 º D) 30 º
- By which velocity a ball be projected vertically so that distance covered by it in 5th second is twice it cover in 6th second?? (g=10 m/s^2)
- A solid sphere of radius R is pulled by a force T acting at the top of the sphere . The sphere is in pure rolling. what is the work done by the force when the centre of mass moves by a distance 'd'?
- If linear momentum of a particle is increased by 50%, how much percentage increased would occurred in its kinetic emergy?
- Two particles are projected simultaneously from the same point at angles α and β respectively. if they simultaneoulsy strike the top and bottom of a vertical pole subtending an angle θ at the point of projection, then show that Tanα - Tanβ=Tanθ?
- A single conservative force Fx = (6.0x – 12) N (x is in m) acts on a particle moving along the x axis. The potential energy associated with this force is assigned a value of +20 J at x = 0. What is the potential energy at x = 3.0 m? a. +11 J
- What is the wave length of electromagnetic disturbance consisting of photons that all have 2.754×10^20j of energy in free space ?
- The four forces, taken together, act as a single resulting force. What is the magnitude of this resulting force? The forces are acting on a point and the magnitude of each force is show in the diagram.
- The pilot of an airplane traveling 170 km/h wants to drop supplies to flood victims isolated on a patch of land 150 m below. The supplies should be dropped how many seconds before the plane is directly overhead?
- Centripetal force is what?
- Answer the question 1. the figures show " the image of clocks " in a mirror . for each case find the right time.?
- How can convex lens act as converging lens?
- An object weighs 3 lb. at 10 earth radii from its center. What is the object's weight on the earth's surface?
- Physics Help?
- A shot travelled at a rate of 100m/s pierced a plunk of 4cm thick. what is the velocity of shot to pierce a 9cm thick?
- Electric dipole concept in the physics?
- Help! I'm not good in circuits! Can you please explain the answer to me?
- An Apple is dropped on the moon from a height of 2.0 meters. The acceleration of gravity on the moon is 1.67 m/s2. Determine the time for the feather to fall to the surface of the moon?
- A bike accelerates uniformly from rest to a speed of 7.00 m/s over a distance of 36.0 m. What is the acceleration of the bike?
- What is temperature? What causes it? What are the effects of it? What types are there, if any.
- Describe why velocity changes when you ride a Ferris wheel even if the wheel is turning at a constant speed.?
- A serving of brussel sprouts sits on your dinner plate. They are not moving. But the table upon which they lie is moving about 30 kilometers per second relative to the sun. Can You think of other situations where motion is relative to your point of view?
- A car accelerates from rest at #7.9# #ms^-2#. How much time does it need to attain a speed of #7# #ms^-1#?
- How do you solve this physics problem ?
- 2. A boy stands 10 m in front of a plane mirror . then be moves 3 m towards the mirror. How many metres does his image move towards him? A) 20 B) 14 C) 7 D) 6
- Answer the test questions. 1. which of the properties below is not correct for the image in a plane mirror? A. virtual. B. the same size as the object. C. can be projected onto a screen. D. inverted.
- Physics help!!! How long will it take for the second-place cyclist to catch up with the leader??
- 3. why can,t the image formed in a plane mirror be projected onto a screen? Explain.
- There is a linear relationship between volume, V, and absolute temperature, TK, for an ideal gas at constant pressure....?
- A motorboat moves 12 miles per hour in still water. It travels 9 miles upstream and 9 miles downstream in a total time of 2.0 hours. What is the speed of the current?
- Craigs candy apple red hot rod can go from 0 miles per hour to 60 miles per hour in 12 seconds. Find the average acceleration?
- Write the condition under which net acceleration of a particle in circular motion is not towards the center of the circular path?
- Three vectors in a plane are, respectively, 6, 5, and 4 units long. The first and second form an angle 50°, while the second and third form an angle of 75°. Find the magnitude and direction of the resultant with respect to the larger vector?
- The work- function of a substance is 4.0 eV. The longest wavelength of light that can cause photoelectron emission from this substance is approximately ?: (1) 540 nm (2) 400 nm (3) 220 nm (4) 310 nm
- The coefficient of linear expansion of iron is 0.000011 /k. An iron rod is 10 m long at 27°C. The length of the rod will be decreased by 1.1 mm when the temperature of the rod changes to ?
- Propulsion - Prove F = 2q?
- How come the mass of the bob on a pendulum doesn't impact the length of the pendulum's period? In an experiment I did, as the mass of the bob increased, so did the length of the period.
- While dragging a crate a workman exerts a force of 628N. Later, the mass of the crate is increased by a factor of 3.8. If the workman exerts the same force, how does the new acceleration compare to the old acceleration?
- 1A°=10/8cm,its value in meter?
- Does the same current pass through each bulb in a parallel circuit?
- The value of g on the surface of earth is 9.8m/s². What will be the value of acceleration due to gravity at a height above the ground equal to radius of earth?
- Equation for velocity of a simple pendulum at its mean position?
- Nathan accelerates his skateboard uniformly along a straight path from rest to 12.5m/s in 2.5s.What is Nathan's acceleration?What is Nathan's displacement during this time interval?What is Nathan's average velocity during this time interval?
- The rate of rotation of a solid disk with a radius of #4 m# and mass of #2 kg# constantly changes from #5 Hz# to #1 Hz#. If the change in rotational frequency occurs over #3 s#, what torque was applied to the disk?
- 0.350kg of ice is at a temperature Tice = 0oC and put in 0.350kg of water at a temperature of Twater = 23oC. What is the final state and temperature when the system reaches thermalequilibrium? Include the masses of each phase in the final state
- . Three positive charges lie on the x-axis; q1 = 25 μC is at the origin, q2 = 10 μC is at x1 = 2 m, and q3 = 20 μC is a x2 = 3 m. Find the resultant force on q3?
- Suppose you are transporting a viscous fluid through a set of 16.0 circular pipes, each with diameter 1.0 cm. If you now replace this set of pipes with one large circular pipe which has a cross sectional area equal to the sum of the 16.0 small pipe?
- Which of the following is equivalent to V = IR?
- Physics: A car....?
- How could you find the density of an irregular object which floats in water?
- The height h metres of a ball above the ground at time t secs is h = 5t(4-t) How do you find the average velocities of the ball during the first and third seconds and the average speed? Can you also explain the difference btwn velocity/speed/acceleration?
- A long jumper leaves the ground at 45° above the horizontal and lands 8.0 m away. What is her “takeoff” speed, 𝑣𝑜?
- What is the kinetic energy of a 9 kg skateboard that is traveling at a speed of 5 m/s?
- And brick of weight 4 kgf having dimensions 20cm*10cm*5cm exerts maximum pressure on surface when it is placed on ground with its?
- A snowmobile has an initial velocity of 3.0 m/s. If it accelerates at a rate of 0.50 m/s for 7.0 seconds, what is the final velocity?
- Why and when do we differentiate or integrate equations in physics?
- If a system has a total energy of 10,000 J and the kinetic energy of the system is 2600J, what is the potential energy of the system?
- If there is a nonzero net force acting on an object, what is happening to the motion of that object?
- How to convert V/cm to eV ?
- An apple falls because of the gravitational attraction of earth.What is the gravitational attraction of apple on the earth?
- A 150N wagon is pulled up a 28 degree slope at a constant rate by a force of 100N. What is the coefficient of friction between the wagon and the slope?
- I'm not sue what this is asking me to do could anyone help please? Use the linear relationship between two variables to determine the length of the spring when a mass of 45.0 g is applied to it.
- For a house located about 1 meter from a street, the decibel level for busy street traffic is about 80 dB. If the house was located 190 meters from the street, how loud will the street noise be, in decibels?
- What average force is required to stop a 1600 kg car in 9.0 s if the car is traveling at 80 km/h?
- So if the mass of an object on earth is 40 kg it's mass on the moon is?
- Suppose I am in ISS and I throw a ball upwards, Will it go up with the same speed as I have thrown it or will it go very slowly? I have seen in movies that when people throw things, they move very slowly like a slo-mo......
- What would the mass of a physics textbook is closest to?
- Can we add a vector? If yes how if no why
- Difference between force and energy ?
- Determine whether or not the following resistor measure with in the resistance range specified by their color codes???? (yellow,voilet,orange,gold) measured resistance=44.68)
- An engine lifts 1000kg of coal per minute from a mine of depth 60m how much it would lift in the same time from a mine of 30m depth?
- What is a "moment" in physics?
- A proton of mass m orbits with a speed v =284kms^-1 just outside of a sphere of radius 2.13 cm so that the value of (m)v^2/r =2.87*10^-18. find charge on sphere?
- As we know when separation > 10^-15m Strong force> Electromagnetic force> Gravitational force. But what about weak force? How can we rank weak force in the above case?
- What is the kinetic energy when mass is 1\3 and velocity is doubled?
- From a rifle of mass 4 kg, a bulle of mass 50 g is fired with an initial velocity of 35 m s^-1. What is the the initial recoil velocity of the rifle?
- A machine gun fires a bullet of mass 40g with speed of 1200m/s the person holding the gun can exert a maximum force of 144N on it what is the number of bullets that can fired from the gun per second?
- How do I prove that the motion represented by #y= asin2\omegat + bcos^2\omegat# is a simple harmonic motion ?
- What is the acceleration of a 5 kg mass pushed by a 10 N force ? Please answer this question and thanks for reading this .
- How can we differentiate a positive charge from negative charge?
- What happens to the kinetic energy of a bus as it is braking?
- On a 30 degree incline, a 100 N crate is held motionless by friction. The coefficient of static friction between the crate and plane is 0.60. The force due to friction is...?
- If a ball of 4kg is rolling down a hill with a friction coefficient of 0.2 and starts 40m up the hill, what is the final velocity of the ball and how long does it take for the ball to reach the bottom? Gravity is equal to 9.8m/s^2
- Two forces of magnitude 10n and 12n act on a particle. If the angle between them is 60°, find the magnitude and direction of their resultant?
- If lightc,planks constant and gravitational constant G are taken as fundamental quantities,then express mass,length and time of dimensions of quantities ?
- What is the magnitude and direction of vectors i+j and i-j ?
- The earth revolves around the sun in a circular path with a speed of 30km/s what is the radial acc directed towards the sun?
- The position equation for a particle is s of t equals the square root of the quantity 2 times t plus 1 where s is measured in feet and t is measured in seconds. Find the acceleration of the particle at 4 seconds?
- How much would a #50#-#kg# object weigh on Mercury if the gravity on Mercury is #3.59# #m##/s^2#?
- What type of energy has a tank of petrol?
- What is the acceleration of av0.30 kilogram ball that is hit with a force of 25 N ?
- Find the centeipetal acceleration of the following A point on the equator of earth ? A point at the north pole of earth ?
- What is the mass of a plane with 9500 J of kinetic energy traveling 600 m/s?
- What property of water allows a water strider to walk on water?
- How are distance and displacement similar? How are they different?
- What is a simple way to describe the differences between distance and displacement?
- In the radio broadcast it says that Sputnik is traveling at 18,000 mph. If the Earth is 25,000 miles around, how long will it take Sputnik to orbit the Earth once?
- Why are standardized units of measurement important?
- Which energy is often called the "graveyard of kinetic energy" and why?
- The heat from the combustion of the fuel inside the engine cause the air volume inside the engine cylinder block to increase. When this happens the piston is pushed down and the shaft is turned . Why does that happen?
- A non-uniform rod AB has a mass M and length 2L the mass per unit length of the rod is #mx# at a point of the rod distant #x# from A. Then what is the moment of inertia of this rod about an axis perpendicular to the rod?
- The marked end of a compass needle always points directly to?
- What is phase difference?
- How does the length of a string affect the number of times a pendulum will swing back and forth in 10 seconds?
- Help with solutions! Help please? Thanks
- - A bucket of water weighing 10 kg is pulled up from a 20 m deep well by a rope weighing 1 kg/m length, then the work done is ?
- Two forces are such that the sum of their magnitudes is 18N and the magnitude of their resltant is 12N which is in a direction perpendicular to the smaller force. Then the magnitudes of these two forces are?
- Rohit is working on an Electromagnet project for which he needs to form permanent magnets. Name any alloy used for making strong magnets?
- How much time is needed to accelerate a 5 kg object from 10 m/s to rest if a force of -2.5-N is applied?
- Calculate the quantity of heat needed to convert 200g of ice at 100 degrees Celsius to steam?
- Is it warmer or colder when the temperature chanhes from 20°C to 59°C?By how many °C ?By how many °F?
- Why do things "want" to have the lowest energy possible?
- A car is taking a bend of radius 30m on a frictionless road. If the road has a slope to the direction of centre, what is the angle of the slope to maintain a speed of 13ms^-1?
- A body of mass 10 kg is moving at a constant speed of 20 m/s over a friction less surface.the workdone by the wight?
- Consider sun as black body, then predict the temperature at Sun by assuming wavelength maximum at 500nm?
- A physical quantity Y is given by a^2 b^3/2÷c^4 d^1/2. The percentage error in a,b,c,d are 1%,4%,3%,2%.What isthe % error in Y?
- Please help?! Thanks
- What is the wave equation and its derivation?
- Solve for the currents through each resistor? And the voltages across each resistor?
- A 240-N sphere 0.20 m in radius rolls without slipping 6.0 m down a ramp that is inclined at 37° with the horizontal. What is the angular speed of the sphere at the bottom of the slope if it starts from rest?
- From the discussion of terminal velocity, you will definitely understand that the velocity of a falling body will increasingly reach to a high value for acceleration due to gravity, but in practice that does not happen, why?
- A litre of air initially at 20°c and at 760 mm of hg pressure, is heated at constant pressure until its volume is doubled.find the quantity of heat supplied. Specific heat capacity at constant volume = 714 j/kg. ?
- A ball of mass 10 kg is dropped on ground from a height of 10 metre it rebounds to a height of 2.5 m if the ball is in contact with the ground for 0.01 seconds then coefficient of restitution is?
- Explain how friction keeps a nail in place in a block of wood. If you try to pull out the nail, which way does the friction act?
- One mole of an ideal gas expands isothermally and reversebly from 1litre to 10litres at 27°C. Calculate: (i) change in energy? (ii) Q? (ii) W? (iii) change in heat energy?
- If I traveled at 100 kilometers per hour, how many days would my journey around the circumference of the earth take?
- A person is walking at a constant velocity of 2.5 m/s. How far do they walk in 7 seconds?
- In the circuit below, assume that 𝑅1=𝑅2=1Ω, 𝑎𝑛𝑑 𝑅3=2Ω and 𝑖3=134𝐴 a) Find the current through and voltage across all the elements (the three resistors, voltage source and current sources)?
- If the time period of a vibrating body is 40 seconds then find its frequency ?
- From the top of a 200 meter tall building, a ball is launched vertically with an initial velocity of 65m/s. What is the total time the ball is in the air for?
- How can i prove that light velocity in solid is less than gas?
- Threshold wavelength for photo-electric emission of a metallic surface is 3800Armstrong.A beam of light of wavelength 2600armstrong is incident on the surface.what will be the work function of the metal?
- The Tower is 443 m tall. Joe wants to set the world’s stair climbing record and runs all the way to the roof of the tower. If Joe’s average upward speed is 0.60 m/s, how long will it take Joe to climb from street level to the roof of the Sears Tower?
- As an object falls freely from the top of a building, its total energy remains constant. TRUE OR FALSE?
- The rate of rotation of a solid disk with a radius of #2 m# and mass of #2 kg# constantly changes from #5 Hz# to #9 Hz#. If the change in rotational frequency occurs over #4 s#, what torque was applied to the disk?
- It is said that at higher temperatures an object radiates red color the most. So does an object that is red in color is supposed to have a higher temperature?
- 5.12 . what are the three states of water on earth? A. groundwater , lakes , and clouds B. liquid water , ice , and water vapor C. gas , steam, and vapor D. groundwater ,oceans , and ice
- Constant speed vs constant acceleration - When will B catch up A?
- A box of mass 15 kg placed on horizontal floor is pulled by a horizontal force.What will be the work done by the force if the coefficient of sliding friction between the box and the surface of the floor is 0.3 and body move at unit distance?
- _ is the number of complete oscillation completed in 1 s?
- Is there material that heat moves through in only one direction?
- How do you make a mixed circuit with four resistors and at least one series circuit and at least one parallel circuit in? Thank you!
- An object moves along a straight line. Its displacement s (in metres) from a reference point at time t (in seconds) is given by s(t) = 4t^3 - 21t^2 + 18t + 5 (t ≥ 0) expressions for the velocity v(t) and the acceleration a(t) of the object at time t?
- Determine the stopping distances for an automobile with an initial speed of 95 km/h and human reaction time of 3.0 s for the following accelerations. (a) a = -4.0 m/s2 ______m (b) a = -8.0 m/s2 ______m ?
- Object is kept at distance of 20 cm in front of a concave mirror it's focal length is 30 cm then it's image distance?
- The position of a particle moving along the x-axis is given by #x(t)=t^3-9t^2+24t# meters where t is in seconds, #t>=0# a) Draw a sign diagram for the particle's velocity and acceleration functions.?
- What are the conditions for a moving object to be considered accelerating?
- Suppose you plot the distance traveled by an abject at various times and tou discover that the graph is not a straight line. What does this indicate about the object's acceleration?
- A car travelling with a rated speed of 60 kph around a curve with a radius of 100m. What is the maximum speed?
- Deduce the temperature at which a black body losses thermal energy at a rate of 1 W/cm^2?
- How to prove equation of kinetic energy (KE = 1/2mv^2)?
- If an electric dipole is kept in a uniform electric field then resultant electric force on it ,is........?😮
- How much time will it take a car traveling at 88 km/hr (55 mi/hr) to travel 500 km?
- How far can a beam of light travel if there is no obstruction in its path?
- Use the Friction equation to calculate the force of an object traveling at 10 m/s2 and having a mass of 5kg?
- If a small planet is located eight times as far from the sun as Earth (#1.5 * 10^11# #m#), how many years would it take the planet to orbit the sun?
- What are the CP and CV of a gas if that gas has n degrees of a freedom ratio of specific heat?
- If µs = 0.40 and m g = 20 N , what minimum force F will keep the box from falling?
- How do particles move when a transverse wave passes through a medium?
- An airplane in a holding pattern flies at constant altitude along a circular path of radius 3.70 km. If the airplane rounds half the circle in 170 s, determine the following?
- What is the force, in terms of Coulomb's constant, between two electrical charges of #-5 C# and #-2 C# that are #3 m # apart?
- Is a mirror's surface transparent, translucent, or opaque? How do you know?
- Help with forces on a system where blocks are joined together?
- You found a basket full of chocolate and cake and you eat all of it. Which has 20,000 calories. How much you need to do it Burn 10,000 calories take your mass as #50# #kgs#. The work you need to do is by climbing in the mountain or stair?
- Imagine that a tank is filled with water. The height of the liquid column is 7 meters and the area is 1.5 square meters (m2). What's the force of gravity acting on the column of water? A. 102,900 N B. 110,700 N C. 68,600 N D. 73,500 N
- Why is it that when a swimmer jumps out of a boat, their speed increases as they swim further away from the boat?
- What is charge ?
- A force of 100 N acts for 5 s on an object of mass 20 kg. By how much does the momentum change every second. What is the total change in momentum? What impulse is delivered? How much velocity does the object gain?
- Provided is a diagram showing forces on a box. What is the net force on the box? A 5 N left B 5 N right C 75 N left D 75 N right A rising hot air balloon is acted on by a force pulling it upward and by the force of gravity pulling it downward. Bas
- A small turtle moves at a speed of 410 furlongs per fortnight. Find the speed of the turtle in centimeters per second. Note that 1 furlong = 220 yards and 1 fortnight = 14 days?
- What is the mass of an object that requires a force 30 N to accelerate at 5 m/s2?
- A 2kg ball of clay moving at 40m/s collides with a 5kg ball of clay moving at 10 m/s directly toward the first ball. What is the final velocity if both balls stick together after the collision? Thank You..
- A test model for an experimental gasoline engine does 45 J of work in one cycle and gives up 31 J as heat.What is the engine’s efficiency?
- Why molecular motion complete ceases at 0 degree temperature ??
- If the earth pulls you downward against your chair, what is the reaction force?
- Density of the liquid inside the container is 1000 kg/m3. What is the pressure difference between points A and B? Distance between points A and B is 10 cm and line AB makes an angle 30° with the horizontal.
- How can you calculate solar luminosity of the Sun using Earth's solar constant?
- Two smaller spherical raindrops collide and merge into one larger spherical raindrop. What is the radius and surface energy of this larger drop, compared to the two smaller ones?
- The magnetic field of earth is due to ?
- How do you get the kilowatt-hours on the five meter?
- If force remains the same, and the mass of an object increases, what happens to the acceleration?
- Does the center of mass of a cylinder lie out side the body ? Yes or no
- (1 pt) If an arrow is shot straight upward on the moon with a velocity of 60 m/s, its height (in meters) after t seconds is given by s(t) = 60 t - 0.83 t^2. ?
- Burner supplies heat at the rate of 20J per second.Find specific heat capacity of a solid mass 25gm, if it's temperature rises by 80°C in one minute?
- If the critical angle of any medium is 60°. Then what is the speed of light in that medium?
- The position equation for a particle is s of t equals the square root of the quantity 2 times t plus 1 where s is measured in feet and t is measured in seconds. Find the acceleration of the particle at 4 seconds?
- A body is released from the top of the tower of a height 'h' takes ' t ' second to reach the ground. At 1/2 t the height of the body from the ground is ?
- If you decrease the length of the pendulum by 10%, how does the new period TN compare to the old period T?
- A ball is thrown vertically upward from the top of a 96‐ft tower, with an initial velocity of 16 ft/sec. Its position function is s(t) = –16t2 + 16t + 96. What is its velocity in ft/sec when it hits the ground?
- An 80 kg Bungee jumper jumps from a 200 m tall tower from rest. Un-stretched, the bungee cord is 100 m long. The force constant of the bungee is 60 N/m. How far will the jumper fall until she reaches her maximum distance allowed the bungee?
- A cup has a mass of 0.0650 kg and a volume of 0.000250 m^3 and is floating in freshwater. Pennies are put into the cup until the top of the cup is level with the water line. Mass of the pennies in the cup?
- In a cyclotron, can we say that the velocity of the accelerated particles is independent of time period?
- Does a man do work when he carries a 75 N bag horizontally for 5 m? Why / why not?
- How much power is used to move a 25 kg mass 8 meters in 15 seconds?
- Why does the binding energy per nucleon suddenly decrease between helium and lithium?
- Define binding energy?
- In an atom what stops the electrons from being pulled into the nucleus due to electrostatic attraction? Why are electrons able to stay in orbits without being flung off?
- What are the major formulas used in solving He:Ne laser Numericals?
- Question details are below ?
- Determine the magnitude of a ball's radial acceleration?
- Why do magnets attract only iron objects and other magnets?
- Calculate number of photons emitted by He:Ne laser.When a power output is given of 90 watt?
- If the speed of light in glass is 2×10ms find refractive index of glass?
- A force of #300# #N# is used to push a #145# #kg# mass #30.0# #m# horizontally in #3.00# #s#. What is the power used, expressed in watts and kilowatts ?
- If it takes Cassie 3 seconds to run from the batter's box to first base at an average velocity of 6.5 m/s east, what is the displacement she covers in that time?
- What is the V vs P graph's formula?
- Why capacitor doesnt have emf but the battery has???
- Two boxes of same material start moving on surface one with a velocity 10m/s and another with a velocity V if the ratio of stopping times for the two boxes is 1:3 then the valve of V is? Ans:30m/s
- A wire with a length of 150meter and a radius of 0.15mm carries a current with a uniform current density of 2.8×10^7A/m^2. What is the current?
- A 10ohm resistor has current. If 1200C of charge flow through it in 4minutes. What is the value of the current?
- Calculate the moment of inertia of a wheel about its axis which having a rim of mass 24M and twenty-four spokes each of mass M and length l?
- Speed of light in different mediums question?
- How to find the energy of neutron in units of electron volt where de broglie wavelenth is 1 amsteream?
- A heater coil is cut into two parts of equal length and only one of them is used in the heater. The ratio of the heat produced by this half coil to that be the original coil is? a) 1:2 b) 1:4 c) 2:1 d) 4:1
- What is the path of the light ray that hits a mirror after passing through its focus?
- How many images will be formed by two mirrors kept at an angle of 55°?
- State the laws of reflection?
- Spring constant increases or decreases in series spring arrangemant?
- What do the graphs of distance vs. time and distance vs. time squared suggest? i really need the answer. Thanks
- What is the temperature change needed to restore a rod deformed by tension?
- What is the formula of pressure according to kinetic theory in terms of mass density ?
- A boat travels 6.3km due North and then turns 17 degrees towards the west and travels a further 7.2 km. How far is it from its initial position?
- A waxed paper capacitor has two parallel plates, each of effective area #800 cm^#2. If the capacitance of the capacitor is #4425 pF#, what is the effective thickness of the paper? The relative permittivity of the paper is 2.5.
- A particle having mass [m] and charge [q] is released from origin in a region in which electric field and magnetic field are given by E=E°k vector B=B°j vector Find the speed of particle as a function of z-coordinate?
- A child kicks a stone along the sidewalk with a force of 520 newtons. The stone travels 1.5 meters in 0.30 seconds. How powerful is the child's kick?
- In projectile motion ,is vertical components of force acting zero or not?
- A fathom is a unit of length, usually reserved for measuring the depth of water. A fathom is approximately 6 ft in length. Take the distance from Earth to the Moon to be 247,000 miles, and use the given approximation to find the distance in fathoms?
- Two vectors are given by #vecA = hati+2hatj+2hatk# and #vecB = 3hati+6hatj+2hatk# . Another vector #vecC# has the same magnitude as #vecB# but has the same direction as #vecA# . then which of the following vectors represent vector #vecC# ?
- Lasers are example of longitudinal or Transverse wave?
- Why is a force required to keep a body moving with a uniform speed in a circular motion?
- When you lift a book from the ground to your desk, what kind of work do you do, negative or positive? by lifting the book, what do you change? Does the book gain or lose energy? What kind of energy?
- What kinds of waves are produced in solids, liquids, and gases ?
- What speed is someone moving due to the rotation of earth at the latitude of Tulsa,Oklahoma (36 degrees 12’) ?
- A rock falls from the top of a cliff onto a roadway below. It takes 2 s to fall and its speed when it hits the road is 20 m/s. Assume no air friction, what acceleration does gravity give the rock as it falls?
- When you catch a baseball, what kind of work do you do, negative or positive? by catching the baseball, what do you change? does the baseball gain or lose energy? what kind of energy?
- An arched bridge is to be designed that cars may pass over safely a a speed of 180km/h without jumping off the road.what should the minimum or maximum value of the radius of curvature of the arch be?
- Why pair production and annihilation cannot occur in free space?
- A glider is losing 1.00 m of vertical height for every 6.00 m that it goes forward horizontally. The horizontal speed of the glider is 12.5 m/s. What is the velocity of the glider?
- A wave represented by equation y=0.1sin(100Pit-kx).if the velocity is 100 m/s,it wave number is equal to?
- A 65-kg swimmer jumps off a 10.0-m tower. What is the swimmer's velocity on hitting the water?
- What is the difference between Volts Watts and Ampere? If I have to calculate the amount of energy wasted when I have the percentage of energy wasted, what unit would it be in?
- What is the approximate sums of the following masses in milligrams? 1.0 g, 1.0 mg , 1.0 kg
- A body of 1 kg moves in a circle. At time=0 it moves with the velocity of 4 m/s and a force of 16 N is exerted on it. The force and the velocity share an angle of 60°. What is the velocity at t=1s and what is the radius of the circle?
- Work out? If you throw a maximum range of 45m, what maximum height you might jump assuming the same initial speed in both cases? Thanks
- In a TV set, an electron beam moves with horizontal velocity of 4.2 × 107 m/s across the cathode ray tube and strikes the screen, 41 cm away. The acceleration of gravity is 9.8 m/s How far does the electron beam fall while traversing this distance (in m)?
- A particle with total energy E is moving in a potential energy region U(x). Motion of the particle is restricted to the region when?
- Pressure is scalar or vector and why?
- What is Plank's law of black body radiation ? How we can get the equation.
- Mrs. Jacobs dropped an object from 10 meters. She knows it did 50 joules of work. How much did it weigh?
- Relate the relation between impulse and Force?
- When two boats are moving in parallel then how can they moving toward each other?
- Derive the Range of Projectile motion?
- At what point or points projectile motion is minimum and maximum?
- A cheetah accelerates at 13 m/s^2 on smooth ground in a straight line which forms an angle of 33 degrees (with x as a reference direction) after 2.3 seconds the velocity of the animal in that direction will be??
- A=4i+3j Find unit vector in direction of a vector?
- The energy given out by a 60watt bulb in 30 minutes is a)900joule b)30watt hour c)1108000j?
- Vector A has a magnitude of 12.0 units and points due west. Vector B points due north. (a) Magnitude of B if A+B is 14.4 units? (b) Direction of A+B relative to due west? (c) Magnitude of B if A-B has 14.4 units (d) Direction of A-B rel. to due west?
- A 50-kg block of cement is pulled upward (not sideways!) with a force of 600 N. What is its acceleration?
- The speed of light c is 3.00 x 10^8 meters per second. A) what is the speed expressed in inches per nanosecond?
- A 45 kg object is 2.5 m from a 160 kg object. What is the force of gravity between the objects?
- Two boats left the North Harbor at 4:30 pm. One traveled east at rate of 45 kph, and the other west at 35 kph. How long will it take the boats to be 300 kilometers apart?
- Brian (80.0 kg) wants to drop off a 60.0 m high platform with a 30.0 m cord so that he stops 10.0 m above the ground. 2. What must the spring constant of Brian’s cord be? Thank you!!
- A hill that has a 17.6% grade is one that rises 17.6 m vertically for every 100.0 m of distance in the horizontal direction. At what angle is such a hill inclined above the horizontal?
- The three vectors in the drawing have magnitudes of A = 4.95 m, B = 4.90 m, and C = 4.10 m. Find the resultant of the 3 vectors by the component method. Express the angle as an angle above or below the + or - x-axis (Assume α = 23° / β = 52° )?
- During takeoff, an airplane climbs with a speed of 163 m/s at 31° above the horizontal. The speed+direction of the airplane constitute a vector quantity called velocity. The sun shines overhead. How fast is the shadow of the plane moving along the ground?
- You are holding a rock tied to a string, which is an example of a pendulum. Identify and explain the proper the term for each part of the pendulum in this example?
- When an object is free to move, a constant unbalanced force acting on it will produce what?
- If Jamie wants to arrive at her aunt's house on time for dinner, when will she need to leave her apartment if she only drives the speed limit (65 mph) and her aunt lives 30 miles away?
- A pan filled with hot food cools from 94 C to 86 C in 2 min, room temp being 2 C. When the room temp is 20 C, how long will it take to cool from 74 C to 66 C ?
- How far does a car travel in 0.75 h if it is moving at a constant speed of 88 km/h?
- Determine the quantity of work done when a crane lifts a 100-n block from 2 m above the ground to 6 m above the ground?
- What is the horizontal and vertical component of acceleration of a body thrown horizontally with uniform velocity?
- What is the gravitational potential of Earth on the Moon(in the distance of the Moon)?
- For the circuit given below, find Thevenin and Norton Equivalent circuits?
- Vector A makes an angle of 20° and B makes an angle 110° with the X axis. The magnitude of these vectors are 3m and 4m respectively. Find the resultant?
- Three forces of 30 Newton, 14 Newton and 50 Newton acting simultaneously on mass of 10 kg in East, south and north east direction respectively the acceleration of mass will be?
- How many loops does the primary coil have?
- How many photovoltaic solar panels would be needed in this question?
- A stone is thrown upward from the top of a building at an angle of 30° to the horizontal and with an initial speed of 20 m/s. The point of release is 45 m above the ground. How long does it take for the stone to hit the ground? What is the stone's speed?
- Is light mostly act as wave or particle? and why?
- A horse trots at 24 per hour for 30 minutes. What is the distance traveled at kilometers?
- Why is the center of Newton's ring is dark?
- A backpack has a mass of 8 kg. It is lifted and given 54.9 J of gravitational potential energy. How high is it lifted?
- Brian (80.0 kg) wants to drop off a 60.0 m high platform with a 30.0 m cord so that he stops 10.0 m above the ground. 1. How much EPE needs to be absorbed by Brian’s cord? 2. What must the spring constant of Brian’s cord be?
- Define the simple pendulum?
- A hawk is tracked to be flying over a 24 km distance, going into the wind. This takes about 45 minutes. In the reverse direction, the same trip takes 32, with the wind. What is the speed of the hawk in still air?
- You have a 0.20 kg arrow, and a 500.0 N/m bow. If you pull the bow back 40.0 cm, how fast will the arrow be moving if shot horizontally?
- Find the mass of a body if it's weight is 50N?
- Physics -- Light ?
- How is an emf induced by changing magnetic flux?
- Sanjana reaches office 1 minute early by travelling at a speed of 25km/h and reached 15 minutes early by travelling at a speed of 30 km/h. By how much time will she be early or late if she travels at a speed 20 km/h?
- A particle moves in a straight line so that at time t seconds after leaving a fixed point O, it's displacement,s, is given by s=e^2t-5t. How to calculate the initial velocity of the particle?
- How can friction be reduced?
- Paul drove 600 miles in 10 hours and Mary drove 700 miles in 12 hours. Who is faster? Explain.
- If you are traveling at 8 knots for 45 minutes, how far will you have traveled in nautical miles?
- how can magnetic field strength be increased in case of a solenoid?
- When a rifle is fired, how does the size of the force of the rifle on the bullet compare with the force of the bullet on the rifle? How does the acceleration of the rifle compare with that of the bullet?
- How does changing the amplitude affect the wavelength?
- What happens to the waves when they reach the end of the spring?
- A particle moving along a straight line with a constant acceleration of -4m/s*2 passes through a point A with a velocity of +8m/s at some movement find the distance travelled by the particle in 5sec after that movement?
- What are the difference between reflection and refraction?
- Suppose that, as it evaporates in the upper atmosphere, a raindrop’s diameter change in one minute from one millimeter to one micrometer. It’s diameter has decreased by a factor of ? CHOICES IN THE DETAILS
- What are simple examples of longitudinal wave?
- A rocket of initial mass M discharges jet of mean density D and effective area a at velocity V the minimum value of V which enables the Rocket to rise vertically is approximately?
- Two vectors from an angle of 110°. One of the vectors is 20 units long and makes an angle of 40° with the vector sum of the two. Find the magnitude of the second vector and of the vector sum?
- Half of the chain is lying on the table. The rest of the chain hangs in equilibrium from both of the ends of the table. The extra length of the hanging chain at one end is #1/8#th of the total length of the chain than that hanging at the other end?
- How to solve with explanations ?please thanks !
- Calculate the value of acceleration due to gravity on the surface of the planet Jupiter. Mass of Jupiter is 319 times the mass of the earth. Radius of Jupiter is 11.2 times the radius of earth?
- Two people walk away from the same location at the same time. The first person travels east at a rate of 2.5 m/s. The second person travels south at a rate of 1.5 m/s. ?
- People sometimes have difficulty distinguishing between scientific explanations of common events and other kinds of explanation ( superstition, prejudices, magic, etc.). Which of the following best helps to identify a scientific explanation?
- Which of the following could be a correct metric unit for volume?
- In a simple harmonic motion, which of the following pairs of quantities are always oriented in mutually opposite directions?
- A car accelerated #5# #m##/##s^2# for #380# #s#. What was its change in velocity?
- A metal bar is used to lever a load of 200N. The load is 3m from the fulcrum. What effort is required to move the load?
- The length of mercury thread in a mercury thermometer is 2 mm at the ice point and 26 mm at the boiling point of water.What will be the length of mercury thread in this thermometer if it is used to measure a temperature of 75°C?
- A #5# #kg# skateboard moves at #7# #m##/##s^2#. What is the force of the skateboard?
- 1) A metal bar is used to lever a load of 150N. The load is 1m from the fulcrum and effort is 6m from the fulcrum. What is the effort required to move the load?
- You lift a heavy bag of groceries.The maximum force the bag can withstand without ripping is 160 n.If you have 13.5 kg of groceries in the bag,what is the maximum acceleration with which you can lift the bag without ripping it?
- The velocity v at time t of an object travelling in a straight line is given by v=t-3. Determine the distance it travels from t=0 to t=4?
- Suppose a sled is accelerating at a rate of #2# #m##/##s^2#. lf the net force is tripled and the mass is doubled, then what is the new acceleration of the sled?
- A ball fell freely from tower onto a sandy soil. Its velocity when reaching the ground is 90m/s calculate: a. the tower height b. the mass of ball, if it sank into sand and it's stopped 1 sec later. By knowing the sand resistance to ball motion is 3000N?
- Two crates, of mass 65 kg and 125 kg, are in contact and at rest on a horizontal surface. A 650-N force is exerted on the 65-kg crate. If the coefficient of kinetic friction is 0.18, what is the force that each crate exerts on each other?
- Which of the following quantity is analogous to temperature in electricity? a. Resistance b. Potential difference c. current d. charge
- What happens when a capillary tube of insufficient length is dipped in a liquid?
- Mai's car accelerates at an average rate of #2.6# #m##/s^2#. How long will it take her car to speed up from #24.6# #m#/#s# to #26.8# #m#/#s#?
- How many seconds would it take a cyclist, traveling at 25 km/h, to travel 75 m forward?
- A car's displacement is 42 km [S] after driving for .75 hours. What is the car's average velocity in km/h and m/s?
- Hi there! I would like someone to check this for me and complete the answer. Thanks!?!
- A uniform cylinder of mass #M# and radius #R# rolls without slipping, down a slope of angle #theta#. The cylinder is connected to a spring of spring constant #K# while the other end is connected to a rigid support at #P#?
- An ideal gas system undergoes an adiabatic process in which it expands and does 20 J of work on its environment. How much energy is transferred to the system as heat?
- What is The amount of force needed to sustain motion of a rock in outer space?
- How does the mass of STRING used in the pendulum affect the period of one oscillation?
- Hey all, i'd appreciate it if you guys could give me a clue for my question... How to decide whether a given λ & a string length will actually produce a standing wave. Is it necessary for #antinodes to be integers all the time?
- If proton and alpha particle have same energy.calculate ratio of their radii when they are moving in a circle due to magnetic field?
- Find the ratio?
- A person carries a mass of 20 kg and walks along the +x-axis for a distance of 150m with a constant velocity of 3 m/s. What is the work done by this person?
- A horizontal 20.-newton force is applied to a 5.0-kilogram box to push it across a rough, horizontal floor at a constant velocity of 3.0 meters per second to the right. What is the coefficient of kinetic friction between the box and the floor?
- Madison ran 2.0 m west, 4.0 m east, and then 3.0 m west. What is the vector sum of her displacements?
- A #4.5# #kg# rabbit moves with a constant acceleration of #2.1# #m##/##s^2#. What is the net applied force responsible for the acceleration?
- How does radiation shielding work?
- How does sound travels through solid materials?
- A child of mass 40kg jumps off a wall and hits the ground at 4m/s.He bends his knees and stops in 1s.Calculate the force required to slow him down.How would this force be d/t if he didn't bend his knees and stopped in 0.1s?
- The potential energy of a particle varies with distance as #U= (Asqrt(x))/(x^2 + B)#, where A and B are constants. The dimensional formula for #A * B# is?
- An athlete stretches a spring an extra 35.7 cm beyond its initial length. How much energy has he transferred to the spring, if the spring constant is 56.8 N/cm?
- Why is the reference point of gravitational potential energy set to infinity?
- An arrow is shot at an angle 35◦ with the horizontal. It has a velocity of 49 m/s. How high will the arrow go? The accelera- tion of gravity is 9.8 m/s2 .
- A glass of water is sliding down a frictionless slope. The angle of inclination is #theta#. What angle does the surface of the water make with the horizontal?
- Physics Help?
- A bullet of mass 20 g is moving horizontally with a speed of 100 m/s.It can penetrate 10 cm of given target before coming to rest.If the same target is only 6 cm thick.what will be the speed and kinetic energy of the bullet when it comes out?
- A pop-up toy consists of a mass m stuck to the top of a light spring of natural length #l_0#and spring constant k. The spring is compressed to length #l_1# when the pop-up is stuck to the ground. To what height above the ground does it reach?
- A car starts from rest and moves a distance of 5m in t seconds,where s=1/6t^3+1/4t^2.what is its acceleration when t=0,t=2?
- Physics Question help?
- An object with a mass of #9 kg# is on a ramp at an incline of #pi/12 #. If the object is being pushed up the ramp with a force of # 2 N#, what is the minimum coefficient of static friction needed for the object to remain put?
- If a body strikes a rigid wall with some velocity making an angle theta with the normal and bounces back with the same velocity then the angle made with the normal will be same or not?
- When you kick a ball by a force of 26.3 newtons, what is the magnitude and direction of the force that you experience?
- A vertically projected body attains the max height in 6s.the ratio of KE st the end of 3rdsec to decrease in KE in next 3s is? 1.1:1 2.1:3 3.3:1 4.9:1
- A 24 kg crate, initially at rest on a horizontal surface, requires a 63 N horizontal force to set it in motion. Once in motion, a horizontal force of 47 N is required to keep it moving at constant speed. What is the coefficient of static friction?
- Find the mass of neutron in a m u.. Mass of neutron = 1840 mass of electron?
- How long does an earthquake P wave take to travel the first 6500 kilometers after the earthquake occurred?
- If a Ray of light is incident on a plane mirror at an angle of 90 degree angle of reflection will be what?
- The critical angle between air and glass? Refractive index is 3/2
- A boy of mass 40 kg is on a waterslide which slopes at 30° to the horizontal. The frictional force up the slope is 120 N. Calculate the boy’s acceleration down the slope? Take the acceleration of free fall g to be 9.81 m s−2
- What is the formula for momentum?
- Physics Help on Momentum and mass?
- What are the two common terms for decrease in velocity?
- What are some good websites for physics?
- A polar satellite is launched at 850km above the Earth. Whats its orbital speed?
- A simple pendulum of length 75m describes a vertical semicirlce.Find the velocity of bob at its mean position?
- An astronaut moves on a circular orbit around the earth.what is the average speed for a whole revolution?
- A circular plate with an area of 1 m^2 covers a drain hole at the bottom of a tank of water which is 1m deep. Approximately how much force is required to life th e cover if it weighs 2000N?
- What is the magnitude of the acceleration of the masses?
- Which of the following properties of EM waves does not change in vacuum a)speed b)wavelength c)frequency d)all of these?
- Are there any equations relating friction to heat transfer or temperature change in an object?
- Why a body at linear motion posses angular velocity?
- A car starts from rest and accelerates to 30 m/s in 6 s. What is the displacement of the car during the fourth second?( Between t=3s and t=4s)
- A particle moves along a circle of radius #20/π# m with constant tangential acceleration. If the velocity of the particle is 80 m/s at the end of the second revolution after motion has began the tangential acceleration is ??
- Which one will fall faster when dropped on a lunar surface , coin or feather, why?
- True or false? If no external resultant torque acts on a body its angular momentum remains constant.
- A wheel has angular acceleration of 3 rad/sec² and an initial angular speed of 2 rad/sec. In a time of 2sec it has rotated through an angle of (in radians)?
- What is phase angle?
- What causes you to accelerate when you push the gas pedal in your car with force?
- Helium gas is heated at constant pressure by#10^0 C#. The percentage of heat energy supplied which is used in increasing the internal energy of the gas is? (A) 60% (B) 71% (C) 75% (D) 100%
- Two simple pendulum of length #l# and #16l# are released from the same phase together. They will be at the same phase after a minimum time?
- Why in the graphs the first second of an acceleration starting with 0, the position of the body is half the speed {which is related to the acceleration}?EX: I have a body starting from 0 with an acceleration of 5 m / s ^ 2, in the first second it will hav
- Suppose the airplane in the preceding problem fires a projectile horizontally in its direction of motion at a speed of 300 m/s relative to the plane. (a) How far in front of the release point does the projectile hit the ground? (cont.)
- A sled is tied to a tree on a frictionless, snow-covered hill. If the sled weighs 77.0, what is the magnitude of the tension force T exerted by the rope on the sled and that of the normal force N exerted by the hill on the sled?
- What is one major advantage of digital recordings over analog recordings?
- How does wetness affect the resistance of your body?
- How solve it?
- How to calculate power of accommodation in normal human eye?
- Radio signals travel at a rate of #3*10^8# meters per second. How many seconds would it take signal to travel from a satellite to the surface of Earth if the satellite is orbiting at a height of #4.2 * 10^7# meters?
- Define Viscosity. Give its Si unit. What are the effects of tempreature on the viscosity of gases and Liquids?
- How does density work? Why does density allow a #100kg# block of ice to float on water, but a #1g# steel ball to sink in water? Or a helium ballon to rise in air but a piece of paper to fall?
- A sound wave travels at 340 meters per second. How far from the source the wave has traveled after 0.50 seconds?
- Runner A is initially 5.4 km west of a flagpole and is running with a constant velocity of 9.0 km/h due east. Runner B is initially 4.3 km east of the flagpole and is running with a constant velocity of 7.3 km/h due west. ? (continued...)
- I m sitting on the roof of a moving bus, now i m flipping a coin what result i will get?
- Physics Question - How to find volume?
- Why mass defect occurs in fusion and fission? How fusion occurs naturally?
- What happens to a body falling from a height if any force acts on it in upwards and if it has acceleration less than g?
- 220 V #AC# voltage is supplied to a circuit consisting of a resistance of #4 Omega# and inductive reactance of #3 Omega#. Find the current and power factor in the circuit?
- Two tuning forks a and b of frequency 200 Hz and 400 Hz are vibrated simultaneously. speed of sound in air is 330 m/s. Then the ratio of time taken by the sound a and b to travel 660 m and 490 m respectively in air is ?
- If the length of a simple pendiam is increge by 2% ,then time periode increge by..........?
- How do you work out radioactive decay rates?
- Electric flux depends on the medium or not ?What is the relation of flux with vacuum permitivity according to gauss,s law?
- A kettle has a current passing though it of 12 A when the voltage across it is 100 V. The kettle is used to heat water for 3.5 minutes. If the temperature rises from 35ºC to 93ºC what is the volume of the water heated? The % efficiency of the kettle is 30
- Calculate the height from the Earth's surface that a satellite must attain in order to be in geosynchronous orbit and the satellite's velocity?
- What is potential energy?
- Bullets of mass 0.03 Kg each hit a fixed plate, all at the rate of 200 bullets per second, with a velocity of 50 m/s and reflect back with a velocity of magnitude 30 m/s. The average force acting on the plate in newton is??
- What is the speed of light?
- If K.E is increased by 400 percent the change in velocity is??
- Physics Question - How to find temperature?
- How to convert 80kgm2sec-1into j-min?
- What is the magnitude and direction of a force?
- Diffraction if slit size is less than wavelength and why diffraction is most pronounced when slit length is comparable to wavelength?
- What is the sum of following vectors 10N(0°) +10N(90°) +10N(30°)+ 10N(210°) +10N(180°) +10N(270°)+ 10N(150°)?
- What is the length of the stretched version of the spring, if a 40 g mass hangs vertically on the spring, with a spring constant of 30 N/m? Assume that when the spring is in the relaxed state it has a length of 20 cm. Draw a picture
- How do you determine kinetic energy?
- What is coulombic attraction?
- An engine performs 17,640 J of work on a scooter. The scooter and rider have a combined mass of 180 kg. lf the scooter started at rest, what is the speed of the bike after the work is performed?
- How do alike and different charges interact with each other?
- Sand drops fall vertically at the rate of 3 kg/s on the conveyor belt moving horizontally with a speed of 0.25 m/s .the extra power required to keep it moving?
- Which has more specific heat, iron thump tank or iron bolt?
- What is the amount of heat in calories required to convert 5 gram of ice at 0 degree Celsius to steam at hundred degree Celsius?
- What is the minimun horizontal force to stop a 40kg box from sliding down an inclined planed of coefficient of friction 0.2 given that the plane is 50 degree to the horizontal?
- For rotational equilibrium, is net force acting on the body must be zero?
- A cricket ball of mass 200g is thrown with a speed of 72km/h.If it returned back with the same speed.Then the change in momentum would be?
- Mass of bricks is 4,5 kg. Dimensions – 25*12*6,5 cm. What is pressure, when: a)the brick stands on the big side; b)the brick stands on the other side?
- 100m from X to Y. A drone with a constant speed of 10 m/s goes from X to Y, but there is a constant wind velocity of 5m/s in the direction of Y to X. How many seconds does it take the drone to get to Y?
- A man climbs a tall,old step ladder that has tendency to sway he feels much more unstable when standing near the top than when near the bottom. Why?
- A parabolic mirror, instead of a spherical mirror, can be used to reduce the occurrence of what effect?
- If the area of plates is tripled and medium of relative permitivity 2 is introduced between plates then capacitance of capacitor isa)increases by 500 percent b)decreases by 500 percent c) increases by 600 percent?
- A car travelling initially at 20 m/s is accelerated to 40 m/s in 10sec. What is the acceleration of the car? How far does it travel during the 10 sec.?
- What will be the volume of #8g# of #H_2# gas at the pressure of #4atm# and temperature of #300K# ?
- Frequency of a sound wave is 500hz and velocity is 350m/s. and the phase difference between two point is 60 degree.then what is distense btween them?
- What will be the escape velocity from a planet whose mass is 6 times that of the earth and radius is twice that of the earth considering v is the eascape velocity from earth?
- What are the examples of scalar quantity having magnitude as well as direction except electric current?
- What Heat require to forming 1kg ice form 1kg water?
- How do you calculate Kepler's constant for the solar system?
- Every oscillatory motion is periodic motion but every periodic motion is not oscillatory motion. Explain?
- Use the diagram below to answer the following questions. The coefficient of kinetic friction between the table and the block sitting on it is 0.30. The system is set in motion. (The mass of the string is negligible). (sub questions in "details" below)?
- A 926-kg car enters the freeway. The engine applies a force of 1951 N, and there is a frictional force of 242 N. What is the acceleration?
- Use the diagram below to answer the following questions. A 3.0kg lamp is hanging from two chains of negligible mass as as shown below?
- The coefficient of kinetic friction between the block and the ramp is 0.10 and m=2.0kg. The block on the ramp overcomes static friction and begins to move. The diagram is viewed below?
- Use the diagram below to answer the questions. A force is being applied to a brick pushing it up a vertical wall. The coefficient of kinetic friction between the brick and the wall is 0.40, F=40N, and m=2.0kg.?
- a plane flies 2783 kilometers in 5 3/4 hours, first approximate then calculate the average distance it flies in 1 hour ?
- A hat that weighs 5 newtons is hanging from a hook 1.5 meters above the floor, how much gravitational energy doas the hat have?
- A sample with a net charge of 6.5 uC is placed in a gel ectrophoresis. A voltage of 150 V is applied across the plates. What is the change in potential energy of the sample as it moves through the 150 V difference?
- A 1-kg model airplane has 12.5 joules of kinetic energy and 98 joules of gravitational potential energy. What is its speed? What is its height?
- An elephant running at 8 m/s has 64000j of kinetic energy whats the elephants mass?
- What is the wavelength of radiation with a frequency of #1.5 * 10^13# Hz? Does this radiation have a longer or shorter wavelength than red light?
- Four particles independently move at same speed in a direction perpendicular to the uniform megnetic field . which particle is deflected most a) A copper iron b) A helium nucleus c) Electron d) A proton ?? ?
- Define the term refractive index in term of speed of light?
- A copper rod of mass #m# rests on two horizontal rails distance #L# apart and carries a current of #i# from one rail to the other. The coefficient of static friction between rod and rails is #mu_s#. What are the (a) magnitude and (b) angle(relative.....?
- When person move horizontally with velocity 2 m/s rain appear vertically downward .when person move horizontally with 4m/s , rain appear at angle 45 degree with horizontal. Find absolute velocity of rain?? Also explain what absolute velocity mean here
- A mirror can reflect light then how it can be used by doctor to see a tooth because mirrors reflect light rather than letting the light pass through them?
- What is the work done when a 22-N force pushes a cart 3.2 m?
- A mass hanging from the end of a vertical spring is set into undamped simple harmonic motion with amplitude A.The total energy of the oscillating system is E.When the amplitude of oscillation is increased to 2A the total energy of the oscillating system?
- Why do we measure things?
- A charge Q is placed at each of the two opposite corners of a square.A charge q is placed at each of the other two corners.If the resultant force on Q is zero ,then Q is?
- Mass of body is 25 kg what is its weight in Newton on earth?
- A Thermometer is placed in direct sunlight. Will it read the temperature of the air, or the sun, or of something else?
- What are difference between half wave and full wave rectifictaion?'
- A train covers a distance of 90km at a uniform speed. Had the speed be 15 KMPH more, it would have taken 30 min less for the journey? Find the original usual speed?
- There is an attractive force 3.5N between two point charges.what will the force be if the distance is increased to 5 times its oeiginal value?
- A metal block with a density of 900 weighs 60N in air find the weight of the metal block when immersed in a liquid with density 800?
- Considering there is no friction , find the minimum angle #\alpha# for which the ball gets out of the hole.(answer: #\alpha=60# ; I want to know the full solution) (?)
- A force of 24 Newtons is applied to the small piston of a hydraulic lift. If the piston has a diameter of 20 cm, determine the pressure (in kPa) that would be created in the hydraulic fluid?
- A moving car object of mass 0.5kg is displaced between two points 60 metres apart in a time of 5 seconds. How form of energy is possessed by the object? And can you also calculate the energy?
- What are some examples of vibration (in physics)?
- . A body of mass 7.5kg to be pulled along a place which is inclined at 30 degree to the horizontal. If the efficiency of the place is 75%, what is the minimum force required to pull the body up the plane?g =10m/s square
- A person is standing at the edge of the water and looking out at the ocean. The height of the person's eyes above the water is h= 1.6 meters, and the radius of the earth is R= 6.38 *10^6 meters. (a) How far is it to the horizon? (b) Express (a) in miles.
- A skydiver jumped out of an airplane. On reaching a terminal speed of 60 m s–1, she opened her parachute. Which of the following describes her motion after opening her parachute?
- A 2100 kilogram railroad car moving at 5 m/sec to the east collides with a 4800-kilogram railroad car moving at 3 m/sec to the west. If the cars couple together, what is their velocity after the collision?
- If four identical charges are placed at the four corners then the force on any one charge due to the rest of three charges is?
- A body ascends a slope with a speed of 10ms^-1. If 105 J of energy of the body is lost due to friction , the height to which the body will rise is (take g =10ms^-2)?
- A 0.0010 kg pellet is fired at a speed of 53.4 m/s at a motionless 4.0 kg piece of balsa wood. When the pellet hits the wood, it sticks in the wood and they slide off together. With what speed do they slide?
- Three balls of masses 1, 2 and 3 kg respectively are arranged at the corners of an equilateral triangle of side 1m. What will be the M. I. Of the system about an axis through the centroid and perpendicular to the plane of triangle?
- The sum of magnitudes of two forces acting at a point is 16N.If the resultant force is 8N and its direction is perpendicular to smaller force,then the forces are?
- How does the downward component of projectile motion compare with free fall motion?
- Help with waterwaves?
- A 50 kg skater is pushed by a friend acceleration 5 m/sec2. How much force did the friend apply?
- Can anything ever have acceleration downward than gravity? if so how can this be accomplished
- If a helicopter is flying stationary at one point and if after one hour it will land then the place will be same or different ?
- What kind of object transmits almost all of the light that strikes it?
- Can two atoms traveling fast enough create an explosion?
- The density of a lead block is 11.5g/cm^3 and it is floating in mercury of density 13.6g/cm^3. What force is needed to press the block to immerse it totally if the mass of the lead block is 2kg?
- An object is placed at 25cm in front of a concave mirror of focal length 15cm at what distance from the mirror a screen be placed in order to obtain a sharp image?
- Write 2 examples for work of an object ?
- Some disadvantages of nuclear power and nuclear isotopes in general?
- Where are the convex lens available to seen naturally?
- Laci uses her 1.8-kilowatt hair dryer for 0.25 hour each to dry her hair? How much electrical energy does she use each day to dry her hair?
- Is it accepted by all, that light is made up of photons??
- Calculate resistance of a bulb and highest current flowing through it having rating of #220V - 100W# ?
- Find the ration of resistance of two bulbs having ratings #220V-60W# and #110V-6W# ?
- The acceleration a(t) of a body moving in a straight line is a (t)=8-6t. If the velocity of the body is 25 at t=1 and if s(t) is the distance of the body from the origin at time t, what is s(4)-s(2)?
- Why do we change units of measure?
- Sally has a mass of 52.4 kg and is moving with a speed of 10.7 m/s. What's the kinetic energy?
- How much energy is given out when 37 kg of water freezes at 0 degrees celsius to become ice at 0 degrees celsius?
- What will knowing the net force of an object tell you about the forces on the object? Thank you
- Differentiate between Mass and Weight?
- The frequency of a vibrating string varies inversely as its length. A string 3 feet long vibrates 175 cycles per second. Find the frequency of a 5 foot string? I need to make sure I answered it correctly
- Why is it not necessary to take into account the weight of an escalator when calculating the input power?
- What effect does lift have on a flying bird?
- State the law of conservation of momentun derive it by using the Newton's third law of motion?
- A ball is thrown from a plane of which altitude is 3000 m to the tank on the ground with the speed of 15 m/s. Find the velocity and location of bomb at t=20 s?
- A helicopter is ascending vertically with a speed of 5.40m/snegative 1.At a height of 105m above the earth, a package is dropped from the helicopter how much time does it take for the package to reach the ground?
- If an external force is applied to an body which is in equilibrium,will it be still in equilibrium?
- How do I calculate the uncertainty of #(V^2-U^2)/(2s)#?
- A block of mass 4kg is resting on a rough inclined plane of inclination 30° . The coefficient of friction is 0.7 , the frictional force between the incline and block is ? (g=10m/s Thanks
- At what point (in km from Earth) between Earth and Saturn is the net force of gravity on a body by both Earth and Saturn exactly zero?
- The current in an RL circuit builds up to one-third of its steady-state value in 5.92 s. Find the inductive time constant.?
- A cap has capacitance of #4 muF# in presence of air. Find cap in #muF# when the medium of dielectric constant 8 is placed b/w the plates?
- Can any tell me why the light bent according to the Einstein theory?
- The highest parts of a transverse wave is called?
- Although it cannot sustain its top speed for more than 8.65 s, the cheetah can run a distance of 274 m during that time. If a cheetah with a mass of 50.0 kg is moving at top speed, what is its momentum?
- During a rodeo, a clown runs 8.0 m north, turns 55° north of east, and runs 3.5 m. Then, after waiting for the bull to come near, the clown turns due east and runs 5.0 m to exit the arena. What is the clown's total displacement?
- A force of 200N acts on an body of mass 4kg for 15s . The change in momentum of body is ? Thanks
- If a stone with an original velocity of 0 is falling from a ledge and takes 8 seconds to hit the ground, what is the final velocity or the stone? A)39.2 m/s B)156.8 m/s C)42.6 m/s D)78.4 m/s
- How to solve for distance and original speed when given time, and improved speed and time?
- If v is velocity and t is time, then what is the dimension of a, b and c in the relation v=at+b/(t+c)?
- If the moon is travelling at at a speed of V ms^-1 at a distance r from the centre of the earth, give an equation for its periodic time in terms of pi, r and v?
- I can not do this nor understand?
- The difference between harmonic and overtone ?
- A container has #12 L# of water in it at #90 ^o C#. An object with a specific heat of #160 (KJ)/(Kg*K)# and a temperature of #250 ^oC# is placed into the container. If the water is completely vaporized, what is the object's mass?
- Velocity of a moving object is decreased three times . what will be the change in kinetic energy?
- If only 25% of a radioactive substance is left after 20 days then the half life of substance.??
- What is the magnitude of the force needed to keep a 60-newton rubber block moving across level, dry asphalt in a straight line at a constant speed of 20 meters per second?
- After throwing the ball in the pool for my dog,the ball srung a leak and began to fill with water.how many ml of water can the ball absorb before the ball sinks?
- In an electrical circuit, the current passing through a conductor varies inversely with the resistance. Suppose that when the current is #10# #A# the resistance is #18# #ohms#. What is the resistance when the current is #6# #A#?
- How do you convert 4.22 g/cm to lbs/ft ?
- True or false? -An object may accelerated even though it is moving with constant speed.
- A modern elevator in a building travels at about #3# #ms^-1#. If the elevator goes to synchronous orbit from Earth’s surface, how long will the trip take?
- If every thing has equal and opposite reaction then every thing should be equilibrium? Applied force = Reaction force
- What is the reference angle when theta is -1.8? and Why?
- Solving bu engineering analysis ?
- What is a reference point?
- Physics Help?
- A particle starts circular motion from point (3, 5) cm and rotates 1000° in 12s, in an anticlockwise direction with center in the origin Determine a) The angular displacement b) The average angular velocity c) The initial angular position?
- Why we don't consider atmospheric pressure in our weight?
- Ripples are produced on water surface in a bucket. the separation between consecutive crests is mm and the ripples produced on surface at a speed of 2 cm per second. How many crests hit the wall of the container per second ?
- The frequency of a tuning fork is 384 per second and velocity of sound in air is 352 m/s. How far the sound has traveled while the fork completes 36 vibrations ?
- A body of mass 5kg falls freely from rest through a height of 80cm and comes to rest having penetrated the 50cm into the ground.calculate the time taken in falling?
- Magnetic Forces between Four parallel copper wires?
- What is the dimensional formula of density?
- The position function is s(t)=(1/4)t^2+1. At what time is the car going the same speed as its average speed over the interval 0 to 10 seconds?
- If a ball is thrown into air with a velocity of 40ft/s,it's height after t seconds is given by y=40t-16t^2 FIND velocity when t=2?
- How can work be negative?
- Write 2 Examples of relative motion in real life?
- Find the initial velocity and constant acceleration of the green car?
- Full form of SI?
- If an electron is placed in an electric field with a potential difference of (1.35x10^2) V, the maximum speed the electron can attain is?
- Physics Help?
- A hollow verticle cylinder of radius r and height h has a smooth internal surface. A small particle is placed in contact with the inner side of the upper rim, at point A, and given a horizontal speed u, tangential to the rim?
- A train passes through a tunnel that is 250 m long. What is the fundamental frequency of the vibrating air in the tunnel?
- Mechanics question please help How do you find t?
- The magnitude of cross product is equal to the dot product of two vectors .Find the angle between the two vectors.?
- What is the difference between diesel and gas engines?
- Will a free falling object continue to gain speed?
- How electric current was formed and how current flows into a wire?
- A particle of mass m is projected with initial speed u at an angle of 45 degree with the horizontal.What is the torque of the force on the object about point of projection at the highest point?
- How earth discharges the infinite amount of electricity produced by thunder? What happens in earth while discharge?
- The normal boiling point of a liquid oxygen is -183°c. what is its temperature in kelvin scale?
- Physics Help?
- Can you explain in detail why the answer is D ?
- What is the construction and working of G.M.Counter?what is the mean by dead time?
- Lisa enters her high school chemistry class wearing a big fuzzy Christmas sweater with long, baggy sleeves. Her teacher, Mrs Drosophila, kicks her out of the lab. What safety hazard did Lisa cause?
- Austin takes 1 minute and 45 seconds to run three-quarters of a circular track. His rate of motion is / radians per second.?
- Find the final temperature of 5kg of water?
- How do we draw the variation of displacement with respect to time for the first three terms in the square wave fourier series?
- Can someone Please explain Lenz law for electromagnetic induction? the current opposes the change, why is north pole induced,when magnet is placed in solenoid and south pole after the magnet is pulled out?
- Solve this trigonometry?
- What is another name for the first law of motion? thank you
- A ball is rolling with the speed of 2.5 m/s because of the friction. Velocity of the ball decreases with 0.6 m/s^2. Find the distance that ball can reach?
- A boat which travels at 9.5 km/h relative to the water aims straight for the north bank of a river. If the average river speed is 1.1 km/h East and the boat is 2.5 m downstream when it reaches the opposite side, how wide is the river?
- What is physics?
- A diatomic ideal gas is heated at constant volume until its pressure is doubled. It is again heated at constant pressure until its volume is doubled. The molar heat capacity for the whole process is ?
- Electron speed?
- Why is the value of g max at poles and min at the centre? Pls in a simple language
- What is radius of gyration?
- Mass of a body is 25 kg. What is its weight in Newton on earth? The body is carried to a planet whose mass is two times the mass of earth and radius is half that of earth. What will be the mass and weight of the body on the planet? (Take the value of g on
- A long jump shot is released 2.7 m above the ground, 5.96 m from the base of the basket, which is 3.05 m high. For launch angles of 30° and 60°, find the speed needed to make the basket?
- A stone is dropped from the peak of a hill. It covers a distance of 30 m in last second of its motion. What is height of peak?
- A body weights 300 gf in air and 260 gf in water find:(a) apparent loss in weight of body. (b) the buoyant force on the body ?
- Please explain this question on Acceleration due to gravity detail ?
- A 15g ball is shot from a spring gun whose spring has force constant of 600N/m. The spring is compressed by 5cm. What is the greatest possible horizontal range of the ball for this compression is (take g=10m/s^2)?
- Can you answer with steps? Thank you^^
- Are K.E and P.E equal? If yes how?
- A 20kg lump of rock weighs 32 Newton on the moon. How much would the rock weigh on earth?
- Two bulbs A and B of 20 W and 40 W respectively are connected in series operating at potental difference of 220V if potential difference exceed to 440 V then which bulb will fuse quickly? A)Bulb A b)Bulb B c)both d) none
- Why does light move in a straight line?
- A block of mass 3.0 kg is hung from a spring, causing it to stretch 12 cm at equilibrium, as shown. The 3.0 kg block is then replaced by a 4.0 kg block, and the new block is released from the position shown. How far will the block fall before it reverses?
- A mover is loading 253kg crate of hammers onto a truck. the upward force on the crate is 2470N, and 3650J of work are required to raise the crate from the pavement to the truck bed. How far is the crate lifted?
- The radius of the Earth is R and acceleration due to gravity at it's surface is g. If a body of mass is sent to a height of R/4 from the Earth's surface, the potential energy is?
- Radius of gyration?
- A ceiling fan starts rotating from rest with angular acceleration varying as #A=D^(1/2)# where D is the angular displacement magnitude.how does its angular velocity vary with respect to D?
- A crate is launched up an incline plane and then begins sliding down to its starting position. The coefficient of friction between the crate and the plane is 0.3 The speed of the crate when it reaches the starting position on the trip down is...?
- What is the equivalent resistance of the circuit?
- Two persons A and B of mass 50 kg and 100 kg are standing at extremities of a boat of mass 100 kg with length 5 m floating at rest in still water.What the distance moved by the boat if they interchange their positions ?
- How does a sun clock work?
- The rate of rotation of a solid disk with a radius of #6 m# and mass of #5 kg# constantly changes from #5 Hz# to #3 Hz#. If the change in rotational frequency occurs over #5 s#, what torque was applied to the disk?
- Would beryllium, #1s^2 2s^2#, be attracted to a magnet?
- An airplane takes off from a location at 17° S. latitude and flies to a new location 55 degrees due north of its starting point. What latitude has the airplane reached?
- Imagine a place where gravity is slower than on earth,there 1 second is equal to 10 seconds on earth.There, will light cover more distance than that on earth in 1 second? How will you measure its speed?
- Where can I submit my new theory in Physics?
- A 75 kg bobsled is pushed along a horizontal surface by two athletes. After the bobsled pushed a distance of 4.5 m starting from rest, its speed is 6.0 m/s. What is the magnitude of the net force on the bobsled?
- Name three ways measurements are used in science and why it is important?
- A particle of mass 'm' is kept at rest at a height '3R' from the surface of earth where R is the radius of earth and M is the mass of the earth . Minimum speed with which it should be projected so that it does not return back is!?
- State the physical property that varies with temperature for a thermocouple thermometer?
- A block has a mass of 10kg on earth and a weight of 60 lbs. what would it’s mass and weight be on the moon?
- Can we add velocity and acceleration vector?
- A vibrating rope is stretched by a force of 75 N. If the mass per unit length of the rope is 33kg/m, what is the speed of the wave?
- The force of friction b/n a body of mass 45kg and horizontal floor is measured to be 60N. What is the coefficient of friction b/n the body and the floor?
- The force of friction b/n a body of mass #45# #kg# and a horizontal floor is measured to be #60# #N#. What is the coefficient of friction b/n the body and the floor?
- A 0.10 kg stone is thrown from the edge of an ocean cliff with an initial speed of 20. When if strike the water below. It is travelling 45 m/s. What is the change in kinetic energy on the stone?
- From a supply of identical capacitors rated #8 mu F, 250 V#, the minimum number of capacitors required to form a composite #16 mu F, 1000 V# is? (A) 2 (B) 4 (C) 16 (D) 32
- "To wash clothing water must be forced through the tiny spaces between the fibres. This requires increasing the surface area of water". I didn't quite understand why surface area has to increase???
- The electromagnetic spectrum is the entire range of?
- What is the motion of hands of an athlete in a race?
- Which has greater deceleration, a bicycle moving at 20 m/s then slowing down to stop in 6 s or a car slowing down from 20 m/s to 15 m/s in 6 s? Thanks if you answered :D
- A spherical shell of radius #R# and uniformly charged with charge #Q# is rotating about its axis with frequency #f#. Find the magnetic moment of the sphere?
- If the dot product of two vector be zero then what is the angle between them?
- If the same force is applied to m1 and m2 the mass of m1 is twice m2 what is the acceleration of m2 interms of a1?
- A student walks to school at a speed of 1.2 m/s. If the student's mass is 53 kg, what is the student's kinetic energy?
- What is the acceleration of a car moving 20 m/s constantly for time interval of 5 second?
- The velocity of an object is given as a function of time by v = 4t − 3t2, where v is in m/s and t is in seconds. Its average velocity over the interval from t = 0 to t = 2s:?
- A car is moving with a speed of 90km/hr. what is it speed in m/s?
- A car travels with a uniform velocity of 20m/s for 8 seconds. How far would it travel in that time?
- People carry pots full of water or load on a thick piece of cloth on their head.why?
- Why does the space craft do not attract towards sun ????
- What's the advantage of doing an RMS compared to taking a normal mean?
- What is the average speed for the total journey? Full question the description box below as an image.
- Two particles A and B of mass 2 kg and 3kg are thrown from the top of a tower such that A moves horizontally with vel. of 30m/s and B moves vertically up with vel. of 20m/s(g=10m/s^2).What is the acceleration of the centre of mass of the system?
- A 150N boy rides a 60N bicycle a total of 200m at a constant speed.The frictional force against the forward motion of the bicycle equals 35N. How much work does the boy do?
- A cat of mass 12 kg is at rest. How much work is needed to accelerate the cat to 5.5 m/s? If this work is done over 10.0 m, what average force is needed to accelerate the cat?
- Does the ball hits the ceiling?
- A basketball player tries to make a long jump shot, releasing the ball at the height of the basket. Assuming that the ball is launched at 45.0°, 12.0 m from the basket, what speed must the player give the ball?
- If moment of inertia of a point particle at a distance r from an axis would have been defined as I=mr,then what will be the M.I of an uniform rod of mass M and length L about an axis passing through its centre and perpendicular to the rod?
- The frequency of a sound wave is 540 hertz. The speed of sound in air is 340m/s. Find the wave length?
- Which places around you form shadows on a clear sunny day?
- A sound wave having 400 hz frequency travelling with a speed of 360 meter per second . Two points on wave are 0.2 m apart find the phase differnce between them in the direction of travel ?
- Velocity of a particle varies with time as v=t^2-t-2. average speed of the particle in time interval from t=0 to t=4sec?
- What is mean by concave and convex lens?
- I need help in solving questions based upon simple harmonic motion? CAn you please help me with some tricks?
- An electron is revolving round a proton, producing a magnetic field of #16 weber/m^2# in a circular orbit of radius #1Å#. Its angular velocity is?
- Which kind of shadow usually occurs on sunny days? On cloudy days?
- Name a quantity commonly graphed on the x-axis?
- A truck traveling at 74.5 kilometers per hour away from you. The driver is blowing the horn which has a frequency of 415 Hz. The speed of the sound is 346 m/s. What is the observed frequency of the sound?
- A car accelerates starting from rest from origin while its engine delivers the constant power p . then find the velocity and position of the car after time t ?
- Moment of Inertia?
- What physical phenomenon does the relationship #B_(galv) = (mu_0iN)/(2r)#?
- A particle travels in uniform circular motion ,is the angular and linear v constants?
- Why do surfers like water waves with high amplitudes?
- Distances from Zagreb to Vienna is 400 km. At the same time, the first train goes from Zagreb with the speed of 100 km/h and the second train from Vienna goes 120 km/h. How to calculate the meeting spot graphicaly?
- A stone is dropped from the roof , it passes a window 2m high in 0.1s. How far is the roof above the top of the window?
- A driver in a car traveling at a speed of 20.0 m/s sees a cat 100.0 m away on the road. How long will it take for the car to accelerate uniformly to a stop in exactly 90.0 m?
- The frequency of a sound wave is 50 Hz and the wavelwavelength is 6.6m.calculate the speed of sound?
- what is the magnitude and direction of electric field intensity due to an electric dipole of length 2a at the midpoint of the line joining with two charges?
- What are 3 simple machines in an electric drill?
- What is the angle between wave velocity and particle velocity of a longitudinal wave ?
- What force causes the periodic motion of a spring on a horizontal surface?
- A particle moving along a circular path with speed increased by g per second. If the radius of angular path be r. Then the net acceleration of the particle is..???
- What is the rate of energy required to convert water to steam?
- What is the uses ofuniform circular motion?
- Two circular, similar, coaxial loops carry equal currents in the same direction. if the loops are brought nearer, what will happen?
- Are we can say that weight and gravitaonal force are equal nd whats the difference between them?
- Calculate how many kilometers light travels in space: 1. in a day? 2. in a week? 3. in a month?
- What kind of speed registered by automobile speedometer: average speed or instantaneous speed ?
- What is correct for an ideal gas undergoing reversible adiabatic expansion regarding temperature –?
- How much amount of heat is required to convert 1 kg of ice at -10 degrees C into steam at 100 degrees C at normal pressure?
- Find the angular velocity of the rod in the picture given below?
- The temperature difference between the inlet and outlet of an air-cooled engine is 30K. The engine generates 7kW of waste power that the air extracts from the engine. Calculate the rate of flow of air (in kg/s) needed to extract this power..?
- If the magnitude of momentum of a certain body be increased by 50percent,it's kinetic energy will increases by what?
- Please give the derivation part of moving coil galvanometer?
- Energy is neither created nor destroyed but can be changed from one form to another.Then light energy is transformed to which form?
- The sound level at a point is increased by 30 decibels. By what factor is the amplitude increased ?
- Stephine servers a volleyball from the height of 0.83 m and gives it and initial velocity of +6.9 m/s straight up. How high will the volleyball go? ( in m) How long will it take the ball the reach its maximum height? ( in s) Acceleration is 9.81 m/s2
- A projectile is launched at an angle of 30 to the horizontal with a speed of 30 m/s. How does the horizontal component of its velocity 1.0 s after launch compare with its horizontal component of velocity 2.0 s after launch?
- 1.A roller coaster moves 90 m horizontally and then travels 45 m at an angle of 45 degrees above the horizontal. Calculate both the magnitude and direction of its displacement from its starting point?
- What is fraunhofer diffraction ? what is minima and maxima ?
- Photons travel with speed #c# irrespective of frame. Explain?
- How much energy can be stored in a spring with #k=450# # N##/m# if the maximum possible stretch is #18# #cm#?
- 10. Can the direction of the net force acting on an object be opposite to that of its acceleration?
- Is current always equally split in a parallel circuit with two branches? one branch has 2 bulbs, the other 3 bulbs. 2 3V cells are connected. The branch with 2 bulbs has 3A, but then how much will the other one have?
- A sound wave traveling at 340 m/s is emitted by the foghorn of a tugboat. An echo is heard 2.70 s later. How far away is the reflecting object? Answer in units of m.
- A sound wave of frequency 400hz is travelling in gas at a speed of 320m/s. What is the phase difference between two points 0.2 m apart in the direction of travel ?
- Express the unit newton in term of base SI unit.?
- If no net force acts on a body, is it possible for it to move?
- A 2.0 kilogram mass is pushed along a horizontal surface by a 3.0 N force. How much work is done in moving the object 1.5 meters?
- Find the acceleration of an object experiencing a force F=120 N. and m = 40 kg ?
- Why can metal utensils get too hot to touch when you are cooking with them?
- The length of a seconds hand in a watch is 1 cm. Magnitude of change in velocity of its tip in 15 sec is?
- Why can't light be trapped in a mirror box?
- A projectile is fired with the velocity of 45 m/s at an angle of 32. what is the horizontal component of the velocity?
- One last question I need help with before I finish this physics work book :) Thanks?!1
- What makes pressure vary?
- The following circuit was created. I would be very grateful if you could check that the what I have said about it is correct... ?
- A horizontal force P is exerted on a 20kg box to slide it up a 30 degree incline. The friction force regarding motion is 80N. How large must P be if the acceleration of the moving box is to be 0.75 m/s^2 ?
- If the length of the second's pendulum is reduced to half of the original then the new time period will be?
- Why the lowest tempreture is -273C ?prove?
- Why the speed of light is always constant to every observer?
- Is sun a source of em waves?
- How to solve the following ?
- Why is repulsion sure in charged body?
- Why do we hear sound when we wiggle our fingers rapidly?
- Why the kinetic energy of body become half when projectile is at maximum height?
- Physics question?( pls refer to the image) The correct answer should be C.
- A body starting from rest covers a distance of 0.45 km and acquired a velocity of 300 km/h. Its acceleration will be what?
- A 20. kilogram object strikes the ground with 1960 joules of kinetic energy after falling freely from rest. How far above the ground was the object when it was released?
- Please solve q 12?
- What is the formula used to estimate the Young's modulus effects on the sound speed in a string? Is the formula below correct? Any recommendation for the physics reference book which elaborate on the derivation of the sound speed in a string?
- Can someone advice a good video for internal energy?
- Physics question?( pls refer to the image)
- What is the impact speed when a car moving at 200 km/h bumps into the rear of another car traveling in the same direction at 89 km/h? Answer in units of km/h.
- The faster we move the slower the time.WHY?
- Please solve q 13?
- What is the net force on a #2#-#kg# is skateboard accelerating at a rate of #2# #m##/s^2#?
- A body is thrown upwards with velocity 100 M per second and it travels 5 M in the last second of its upward journey if the same body is thrown upward with velocity 200 m per second what distance will it travel in the last second of its upward journey?
- What is a force ?
- What is band theory ?
- How do you differentiate between momentum and kinetic energy?
- If the size of the nucleus (10^-15 m) is scaled upto the tip of a sharp pin (10^-5m), then what roughly is size of the atom?
- If we throw a body vertically upwards with velocity 4 metres per second then at what height does its kinetic energy reduced to half of its initial value(10m/s^2)?
- Please answer q 59 and 60?
- How wave optics is applicable in day to day life?
- 3 tuning forks of frequencies 200, 203,207 Hz are sounded together.Determine the beat frequency?
- Why is frictional force a contact force and magnetic force a non contact force?
- Difference between average velocity and most probable velocity?
- Four identical masses of 800kg each are placed at the corners of a square whose side length is 10.0cm. Determine the nett gravitational force on one of the masses, due to the other three?
- The resultant vector of two other vectors is 10 units long and forms an angle of 35° with one of the component vectors, which is 12 units long. Find the magnitude of the other vector and the angle between the two?
- How are waves in water and sound waves similar ?
- The longitudinal are initially polarised or unpolarised?? Because the movement of the particles is along propogation of the wave which is one plane... So pls explain sound wave is polarised or unpolarised
- Two vector, 6 and 9 units long, from an angle of (a) 0°, (b) 60°, (c) 90°, (d) 150°, and (e) 180°. Find the magnitude and direction of their resultant with respect to the shorter vector?
- Show that addition of vectors is commutative, i.e. A+B=B+A?
- What is a velocity profile?
- Which will cause more damage, a truck weighing 700 kg traveling at a speed of 17 m/s or a truck weighing 300 kg traveling at a speed of 28 m/s?
- A projectile is fired horizontally with a Vx of 3.3 m/s from a 1.25 m high table. Determine the range of the projectile? a. Vx and Vy b. Time in air c. Range d. Max Height
- How do you calculate the kinetic energy of a 100.0-kg meteor approaching the Earth at a speed of 10.0 km/s?
- Find the centre of mass of a triangular lamina.?
- A ball of mass 100g falls from a height of 5m onto a floor and rebounds to a height of 3m. What energy is lost as a result of the impact on the floor?
- A flywheel in the form of a uniformly thick disk of radius 1.63 m, has a mass of 90.6 kg and spins counterclockwise at 291 rpm. What is the constant torque required to stop it in 4.25 min?
- Find the centre of mass of three particles at the vertices of an equilateral triangle. The masses of the particles are 100 g, 150 g, and 200 g respectively? Each side of the equilateral triangle is 0.5 m long.
- Do transverse waves or logitudinal waves travel at speed of light and can be heard and why?
- Find the angle between two vectors, 10 and 15 units long, when their resultant is (a) 20 units long and (b) 12 units long. Draw the appropriate figure?
- Here is a question about atmosphere that I need some help please. Thanks!/?!
- Would more energy or less energy be released? Can I get some help with this question please? Thanks!
- A mass of 150kg experiences a force of 100N,find the energy or work done if the mass moves 10cm?
- If we throw a thing upwards in the surface of moon what will be its maximum height?
- If the sun was 10 times as far away from earth, how it would affect us?
- A container has #12 L# of water in it at #90 ^o C#. An object with a specific heat of #750 (KJ)/(Kg*K)# and a temperature of #250 ^oC# is placed into the container. If the water is completely vaporized, what is the object's mass?
- A particle performs uniform circular motion with an angular momentum L. if the angular frequency f of particle is doubled and kinetic energy is halved, its angular momentum becomes?
- An astronaut weighs 784 N on the surface of Earth. Given that the radius of Earth is #6.37 xx 10^6# m, the distance that the astronaut must be above the surface of Earth to have a weight of 100.0 N is ???
- If the earth were to suddenly contract to#(1/n)th# of its present radius without any change in its mass, the duration of the new day will be nearly (in hours) ??
- A solid cuboid is standing on a flat surface on one of its faces. The cuboid is 3 cm by 4 cm by 5 cm and has a mass of 0.5 kg. What is the maximum pressure that the cuboid can exert on the surface?
- How to convert rev/s into rad/sec?
- A beaker has a plastic toy in it and the beaker is placed on a tripod stand. What will happen to the plastic toy if the water in the beaker is warmed?
- Derive expression for the wave length of electron?
- What is the wavelength of a photon with an energy of #4.56 times 10^-19# J?
- The rotational inertia I of a solid sphere is two fifths of the product of the sphere's mass M and it's radius squared r²?
- Is the tension of the string when the stopper is at the top of the circle the same, greater than, or less than the tension of the string when the stopper is at the bottom of the circle?
- The current traveling from the cathode to the screen in a television picture tube is #5.0 times 10^-5# ampere. How many electrons strike the screen in 5.0 seconds?
- When we stop paddling a cycle,it does not stops suddenly.why?
- Why is work done by gravitational force of sun during motion of a planet from perihelion to aphelion negative?
- Car side mirrors do not work when they are covered with frost. What does frost do to the surface of a mirror to cause a diffuse reflection?
- How does physics influence the other sciences? and what are the main approachs to physics?
- Write the four properties of photon?
- A simple pendulum consisting of a small bob attached to a light string of length 40cm is released from rest with the string at 60° to the downward vertical.find the speed of the bob as it passes through the lowest point?
- A simple harmonic oscillator has a time period of 10 sec. Which equation relates its acceleration and displacement ? a) a= -10 x b) a= - (20 π)²x c) a= -(20 π)x d) a= -(2 π/ 10)²x
- Which has more mass, a kilogram of feathers or a kilogram of iron?
- How do I find the missing values?
- Which has greater resistance Voltmeter or millivoltmeter?
- If a point moves in straight line in such a manner that its acceleration is proportional to its speed (a ∝ v) , what is the relation between distance covered and speed?
- Why is the input region of a transistor is forward biased and output region is reverse biased?
- A block of mass m slides on a frictionless table. It is constrained to move inside a ring of radius R. At time #t=0#, the block is moving along the inside of the ring with velocity #v_o#. The coefficient of friction between the block and the ring #mu#?
- If two objects had their masses quadrupled, what happens to their gravitational attraction?
- What is the lowest and highest speed in km per hr that you might be goiung to ? HELP PLEASE I DID MOST OF IT !
- How to find the horizontal distance?
- What is the Fermi level in electronic???
- A mass of 2kg hangs freely from a length of string from the roof of a lorry which is accelerating in a straight line at 2m/s^2. Calculate the tension in the string and the angle the string makes with the vertical?
- A man can swim in still water with a speed of 3 m/s. #x# and #y# axes are drawn along and normal to the bank of the river flowing to right with a speed of 1 m/s. The man starts swimming from origin #O# at #t=0# second. Assume size ............?
- Heat Transfer Problem?
- Hello teachers , my question is that ..the image distance in case of convex lens is always positive for real Image. okk but for inverted image what will the sign can i use ???? Thanks
- If a train travels 100 miles in 18 minutes, how fast is it going?
- What effect is seen in the kinetic energy a moving its mass is decreased by two times and velocity is increased by 4 times? show in calculation.
- Which ruler has the most energy? Why? Assume all rulers are identical. (a) A ruler at rest (b) A ruler flying across the room (c ) A bent ruler at rest (d) A bent ruler (tied by a string to form a bow) flying across the room.
- What is science?
- What happens when initial phase is zero in shm?
- What is oscillatory motion?
- If the apparent weight of an object at the equator were to become zero then the spin angular velocity of earth must be how many times the present spin angular velocity?
- Bus is moving with a speed of 90km/h in a straight line track the driver applies break uniformly and reduces speed from 90km/h to 60km/h in 2 minute calculate average velocity of the bus during this uniformly retarted motion?
- In a thermal expansion, when do you include stress and strain?
- What is energy?
- An object is attached to the bottom of light vertical spring and set vibrating. The maximum speed of the object is 15cm/s and the period is 628 Milli second The amplitude of the motion in centimeters is?
- Oh Hi there, can you help me real quick please? Thanks :)
- A body goes from a to b with the velocity of 40 m/s and comes back to a with a velocity of 60m/s. the average velocity for the total journey is?
- Does a body possess acceleration if it is moving in circular path or in a straight line?
- A thin rod of mass m and length #l# is suspended from one of its ends.It is set into oscillation about a horizontal axis. Its angular speed is #omega# while passing through its mean position. How high its centre of mass rise from its lowest position?
- An object 1.75 cm tall is placed 13.5 cm from a converging lens. A real image is formed 7.86 cm from the lens. image? What is the focal length of the lens? How tall is the image?
- The velocity of sound in oxygen at 30 °C is 330 m/sec. What is the velocity of sound in m/sec in helium at the same temperature?
- A container has #18 L# of water in it at #20 ^o C#. An object with a specific heat of #350 (KJ)/(Kg*K)# and a temperature of #550 ^oC# is placed into the container. If the water is completely vaporized, what is the object's mass?
- Mona weighs 750N on earth: I) on planet Mars, the force of gravity is 38% of that of earth.how much will Mona weigh on mars?
- Is convex mirror used in the driving-side mirror??what about shaving mirrors also???
- How much force will be needed to give an acceleration of 1.2 m/s/s to an object which has a mass of 750 kg?
- The gravitational potential difference between the surface of a planet and a point #20m# above is #16J/kg#. The work done in moving a #2kg# mass by #8m# on a slope of #60^@# from the horizontal is ??
- Give example of absolute & relative states of rest and motion of a body from our surrounding?
- What is the decibel level of a sound that is twice as intense as a 90.0 dB sound?
- How does the alpha-particle scattering experiment imply that the nucleus has a positive charge?
- A bullet of mass0.05 kg strikes a wooden plank with the velocity of 300 m/s and emerges out in 150 m /s . Calculate the work done by the bullet?
- When 2.5kg weight of hero's hand hits the villain of 80kg,in a movie,the villain moves with 12.5ms-1 and hits a transformer near by.what will be the speed of hero's hand compared to bullet fired from a gun(here speed of bullet is 370ms-1)?
- What is the force, in terms of Coulomb's constant, between two electrical charges of #-4 C# and #7 C# that are #2 m # apart?
- When measured carefully, the refractive index for glass is different for different colors of light. For red, it is 1.51 and for blue, it is 1.52. What is the speed of both colors in glass?
- What factors determine the focal length of a lens?
- How to work out the refractive index of a material using Critical angle and total internal reflection by using Snell's law?
- A body of mass 60g is suspended at the 20cm mark of a Uniform rule,the meter rule is adjusted on a pivot until it settles horizontally at 40cm mark.determine the mass of the meter rule?
- This is a question about beats I need some help please. Thanks?! :)
- What Is the relationship between the equation E=mc2 with de-Broglie equation ?
- A battery takes 2.0MJ to charge. If the charger operates using 40.0 W but it is only 90% efficient, how long does it take to charge?
- A hydroelectric power plant produces 1200MW of power at 85% efficiency. A nuclear power plant produces 1200MW of power at 40% efficiency. How much is more power wasted in the nuclear power plant than the hydroelectric power plant?
- A container of rocks with a mass of 65 kilograms is is brought back from the Moon's surface where the acceleration due to gravity is 1.62 meters per second? What is the weight of the container of rocks on Earth's surface?
- How do you know that a molecule is polar or non-polar? How do you know where the centroids of partial loads are in a molecule?
- A diamond's index of refraction for red light, 700 nm is 2.410, while that for the blue light 459 nm is 2.450. Suppose white light is incident on the diamond at 40 degrees. What the angles of refraction for these two colors?
- A particle is acted upon by a constant force always normal to the direction of the motion of the particle. It is therefore inferred that ..?? 1 ) Its velocity is constant. 2 ) It moves in circular path. 3 ) Its speed is constant.
- Given the Potential field in cylindrical co-ordinate#V=100/(z^2+1)ρ cosϕ# V and point#P(3m,60^∘,2m)#. Find the values of V and E at point P?
- From a cliff of height 49m,a man drops a stone. one second later he throws another stone.They both hit the ground at the same time. What is the speed with which he threw the second stone ?
- What is the relationship b/w rotatory and circulatory motion?
- What is free vector and position vector?
- If mass of the body on the surface of the earth is50kg, it mass at the centre of earth is?
- If focal lenght of a convex lens is 80cm what will be the power of the lens?
- Please explain elasticity.?
- Help with defining angular displacement?
- In a hydroelectric power station, water drops through a vertical height from a reservoir turning a turbine. The turbine drives a generator to produce electricity. The photograph shows part of the hydroelectric power station at the Hoover Dam in the USA?
- Why don't we measure all length in just one standard unit of length such as metre?
- How can I calculate maximum velocity in simple harmonic motion?
- How can you change the wavelength of the wave? describe how the marked coil of the spring moves along the spring
- This is a question about speed of light I need some help please. Thanks/!?!
- The rear side of the truck is open and a box of mass 40kg is placed on the truck 5 m from the open end. If truck starts from rest with a = 2ms−2 And The coefficient of friction is 0.15, Find The time when box falls off the truck ?
- What would be the weight of a body of mass 60 kg on the surface of the room where g=1.5 m/s what would be its mass.?
- The diagram shows a thin sheet of metal suspended from a hole in one corner at A. The weight W of the metal is 0.33 N and the centre of mass is at B. The distance x between A and B is 5.1 cm?
- At what altitude above Earth's surface would the acceleration due to gravity be 1.7 m/s2?
- Find the magnitude of the current density I n sample of silver for which conductivity ?
- A 135-N sign is supported by two ropes. One rope pulls up and to the right 35.5° above the horizontal with a tension T1, and the other rope pulls up and to the left 45.5° above the horizontal with a tension T2, as shown in the figure. Find T1 and T2.?
- What is the ratio between CGS and SI unit of electrostatic?
- How much energy would be released if 14 grams of C-14 decayed?
- How to find the length of the track?
- Hey guys, can you please check my answer and correct it? If I am missing something, please add :) Of course it is holiday season and no school but I like to keep practicing solving problems :) But of course I need you guys backup!
- Moments q: What force (F) is needed to keep the uniform heavy bar horizontal? (mass of bar = 4 kg)
- What is the counterweight (W) required to balance the light crane arm shown?
- How are magnetic poles and electrical charges similar?
- When will the rate by which the dynamo coil intercepts the magnetic field lines become maximum?
- Work out? The electric field strength at a point 4cm from source change is #100" N/C"#.what will be the electric field strength at distance of 2cm from the same change? Thanks
- To cut a lawn of length 20 m , a man pushes the lawn mover with a force of 81 N at angle of q = 33 degree with the horizontal as shown. The man completes 30 round trips (to and fro) in 25 minutes. Calculate the Power delivered by the man?
- Sound waves are what wave?
- The value of acceleration due to gravity on Mount Everest is ?
- Determine the reactions A and B supporting this beam? Moments/ torque question.
- How the flow rate and velocity are effected by variation in pipe diameter?
- Example of Newton's 2nd law of motion?
- What is the speed of the cube on its trajectory?
- The blade of a windshield wiper moves through an angle of 90.0° in 0.495 s. The tip of the blade moves on the arc of a circle that has a radius of 0.500 m. What is the magnitude of the centripetal acceleration of the tip of the blade?
- A steel wire of length 'l' increases by ∆l due to its own weight. The fractional changes in its volume will be-?
- An egg is thrown off the top of a building. That height in meters above the ground is #h=300+2t-4.9t^2#, where #t# is the time since it was thrown in seconds and #h# is the height meters. How high is the egg above the ground after 5 seconds?
- When we compress a gas then energy is released or absorbed and temperature is increased or decreased?
- How do you derive the effective spring constant?
- This is a question about magnetic fields I need some help. Thanks?! !
- Resistance of conductor is doubled,rate of generation of heat will be ?
- A person on a swing takes 2.0 seconds to travel from her highest backward point to her highest forward point. What is the frequency of her swinging?
- Hello there! Can I get some help with this please? Thanks an advance!
- In an isobaric process pressure is constant ;means piston is fixed ,so then how, work is done?
- Velocity time graphs; what is the distance?
- Which of the following energy systems is a closed system? a. ecosystem b. balloon c. human body d. tree
- A wheel of diameter of 68.0 cm slows down uniformly from 8.40 m/s to rest over a distance of 115 m. What is the total number of revolutions the wheel rotates in coming to rest?
- T1 ,T2 , T3 are tensions, find T2?
- Two masses M1= 5 KG and M2= 10 kg are connected at the ends of an inextensible string passing over a frictionless pulley as shown . When the masses are released ,then the acceleration of the masses will be : (Where 'g' is acceleration due to gravity) ?
- Projectile is launched at a velocity of 125 m/s at an angle of 20°. It strikes a building at a height of 58.6 m above the ground. a. How far away is the building? b. Why are there two answers? c. What is the tallest building the projectile could clear?
- The line of action of two like parallel forces shifts by one fourth of the distance when the two forces are interchanged. The ratio of the forces is?
- A train travelling at 36 kilometers per hour, passes through a tunnel in 6 minutes. A second train, twice as long as the first one, travelling at the same speed, takes 8 minutes to pass through the tunnel. What is the length of the second train?
- Why adding more resistance in a parallel circuit increases the current?
- How to convert between the #am u\ m^2\ s^-2 # into #{kJ}/g#?
- Four identical charges q form a square of side a.Find the magnitude of the electric force on any of the charges?
- Calculate the mean-square speed, of krypton atoms in a sample of gas at a temperature of 22ºC?
- Describe the energy transfers that are happening when you turn on a television?
- Why the gravity decreases ;when we go equator to pole.?
- How much of the electrical energy used to light an incandescent bulb is converted into light energy?
- And here is one more last question please I need some help. It is about electric potential energy and how it is similar to gravitational potential energy. Thanks!?!
- What is the identity of dark matter?
- The angle between two equal vector is?
- I need to find the isotope's half - life. Can I get some help please? Thanks!
- Find the minimum force (in Newton) required by the steam to lift the rod and make it horizontal such that the steam escapes?
- If the momentum of a body decreases by 40 percent,how will it's kinetic energy change?
- The diagram shows a wheelbarrow and its load, which have a total weight of 382 N. This is supported by a vertical force F at the ends of the handles. What is the value of F (in newton)?
- If the liquid in a mercury barometer were replaced with water of density 1000 kg m^-3, what would the height of the water column be, given that the atmospheric pressure is 0.00001013 Nm^-2?
- What is the period of revolution of a planet in circular orbit around a star of 4.0 solar masses if it is at a distance from the star equal to that of the Earth from the Sun?
- An electric kettle rated 2.1 kilowatt contains 1 kg of water.Assuming no heat loss and neglecting the thermal capacities of kettle,how long will it take to start to boil the water if its initial temp is 20C?
- Expression for:¡Mostprobablespeed ¡¡Average speeds and ¡¡¡Root mean square speeds?
- What is the purpose of potentiometer in this fire alarm circuit?
- Q.2 A test charge #q_n = -0.3 µC# is located at a point # P_1(1, 1, () )# in space . Find he electric field intensity at #q_n# due to #10a# point charge #q=+2µC# at origin #()# ?
- In general, will acceleration be greater when sliding up a ramp or sliding down a ramp? Use Newton's 2nd Law to justify your answer.
- Why does the time period of wave remains constant different substances?
- How to solve this ??
- What is an ideal gas?
- The coefficient of friction of an inclined plane is 1/√3. If it is inclined at 30° with the horizontal ,what will be the downward acceleration of the block placed on the in cloned plane? A)0 b)√2ms^-2 C) √3m/ s^2 D)3m/s ^2
- How does newton second law of forces affect the rider and the ride?
- Two automobiles are equipped with the same single-frequency horn. When one is at rest and the other is moving toward the first at 12 m/s, the driver at rest hears a beat frequency of 5.5Hz. What is the frequency the horns emit?
- This is a question about transformer and how it works I need some help please. Thanks?!!
- Uniform motion needs the concept of velocity while non uniform motion needs the concept of acceleration. Why..??
- Angular momentum of a particle rotating with a central force is constant due to..??
- Find the Energy in the Rutherford's orbit?
- If a heavy stone and a cotton ball are dropped from a height,which falls with more speed? Who proved this in his experiments from the Tower of Pisa?
- The moment of inertia of a ring is 0.40 kg m square.if it is rotating at the rate of 2100 revolutions per minute ,calculate the torque required to stop it in 2.0 seconds.what will be the work done?
- What is time dilation?
- I didn't understand why the energy is continuous?
- Please help me calculate the water pressure. Thanks!?!
- How is the best way to go about fluid flow Questions?
- Energy is neither created nor destroyed,can only be changed from one form to another. Then which form of energy is converted into gravitational energy?Gravity is a form of energy, right?
- One mole of a gas occupying 3 decimeter cube expands against a constant external pressure of 1atm to a volume of the 13 litre work done is ?
- If the force is double the acceletation will change by a factor of (assume the mass is constan)?
- A body weighs 144N at the surface of earth.when it is taken to a height of h=3R ,where R is the radius of earth,it would weigh?????
- What happen to velocity of fish with respect to observer when water level is decreases with constant rate?
- A stone of mass m kg is whirled in a vertical circle of radius 20cm. The difference in kinetic energy lowest and topmost position is ?
- What is stress? What is strain? Know the units of each. How are they similar? How are they different?
- What is the difference between force and energy?
- The temperature of a fixed mass of an ideal gas goes from 40ºC to 80ºC at a constant volume. If the initial pressure was x, what is the new pressure?
- What is the in time of the half revolution ?
- What will be the spring constant of 3 spring in such a way that 1st 2 are parallel which are in series to the last one?
- Does viscosity affect the flow of current through liquids?,what is the relation between viscosity and current?
- Explain why a mass of lead heats up more quickly than an equal mass of aluminium?
- What is the speed of moon around earth in meter per secound?
- Physics force question?
- Two spheres are placed so that their centers are 2.6 m apart. The force between the two spheres is #2.75 * 10^-12# N. What is the mass of each sphere if one sphere is twice the mass of the other sphere?
- Haw the terms magneticfeild,magnetic flux,induction,etc... are applied in the production of electricity in dams?
- The velocity of sound wave is less than the velocity of red light in vaccum?
- If a plane travels P miles in Q hours, how long will it take to travel R miles?
- Compare the k.e of two objects of masses 10 kg and 15 kg but having the same momentum?
- A flexible vessel contains 58.00 L of gas at a pressure of 2.55 atm. Under conditions of constant temperature and moles of gas, what is the volume of the gas when the pressure of the vessel is doubled?
- What are the types of acceleration in real life?
- 3. A coil of 40 turns is wound on a long solenoid having 75 turns of wire per cm and has a radius of 3.0cm.a current of 0.25A flows in the solenoid. Calculate a) The magnetic flux density inside the solenoid b) The magnetic flux through the solenoid.?
- What is one atmosphere in barometer?
- Cite an example...situaton of an object and how can u change the shape of an object?
- According to Einstein theory when object moves with speed of light mass increases what's the reason plz don't proof it by formula give reason???
- Mass of a body is 25 kg what is its weight is newton on earth? the body is carried to a plant whose mass is two times the mass of earth?
- How can sound wave having different frequency have the same speed in the same medium?
- I have a small(50 mm height, 5 mm radius) tank made of PMMA fiiled mostly by salted water and a bit air. the water get a 200 C pulse and start to transform into gas. i need to measure the pressure as a function of the height of the tank and time.?
- What is Faraday and lenz law of electromagnetism?
- Would the force of tension equal the applied force on a string?
- Haw is energy produced in dams which is then transfered out by electrical transmission?
- An 8.00-kilogram ball is fired horizontally from a 1.00 × 103 -kilogram cannon initially at rest. After having been fired, the momentum of the ball is 2.40 × 103 kilogram∙meters per second east. [Neglect friction.] Velocity?
- A person runs along a circular path of radius 5 meter.if he completes half of the circle.find the magnitude of the displacement vector,how far the person ran?
- Torches and car reflectors have convex Mirrors why?
- If the linear density of a rod of length L is A+Bx,where A and B are constants.the seperation of the centre of mass of the rod from one end is?
- To which height will a particle elevate over Europa (the moon) if it starts at 1.01 km/s?
- Can ever a beam of light be trapped in an orbit of a star?why?
- Free-body diagram?
- Suppose a ball is thrown at a velocity u and angle A. It lands on the same level. Will the final velocity and landing angle be the same as initial velocity and launching angle?
- Why Einstein is said to be the greatest scientist?
- A particle moves in a straight line in such a manner that s=vt/2, s being distance travelled in time t and v the velocity at the end of time t.Prove acceleration is constant?
- A rock tumbles down from a cliff it is moving at 20 m/s when it hits. What the height of the cliff?
- A bullet of mass 40 grams is fired horizontally with velocity 600m/s into a block of wood of mass 6kg, which is resting on a smooth horizontal surface. The bullet becomes embedded in the block. Find the common speed of the bullet and block which results?
- What is nuclear transfer used for?
- An Olympic skier makes a run down a snowy hill starting at 100 m vertical distance above the ground. (a) If friction is neglected, what is the velocity of the skier at the bottom of the hill? (b) What is the velocity half way down the hill?
- A projectile is thrown up with the initial speed u, making an angle theta (theta > 45 deg) with the horizontal. What is the time, just after which, it will be moving perpendicular to its initial direction of motion?
- If we have E=3v and current I=0.15A and , we have four Resistors are R1=R2=R4 and R3=2R1 find : 1-total resistor ? 2-equivalent R1? 3-voltage in R3-R1?
- Why take SI unit meter is equal to distance travelled by light in vacuum in 1/299792458 sec?
- Physics netforce and friction help?
- And I need some help with this one two. I've solved 5 physics questions on my own today in the class, I am getting better :) almost done! Thanks?!
- A sound wave whose frequency is220 hz has speed of 440ms-1 in a given medium.find the wavelength of the sound?
- I need to calculate the mass. Can I get some help pls? You can use any values you think is the best :) Thanks!
- Sled speed down a hill?
- What is interferance of waves?
- What is the most threatening, long-term, aspect of nuclear fallout?
- What type of energy is transfer in climbing up a rope ladder?
- Which of the following quantity does NOT change due to damping of oscillations ?
- Explain why it is easier to turn a truck when it is empty than when it is carrying a heavy load?
- How is gravity used to generate power? Design a thing that takes advantage of this property.
- Does time period of system executing SHM depends on amplitude of oscillator?
- Two tuning forks a and b of frequency 200 hz and 200 hz are vibrated simultaneously. Then the ratio of time taken by the sound a and b to travel 660m and 490m respectively in air is ?
- What hydrostatic presure has a column of 3.2m of water?
- Explain why sweating cools you down in terms of molecular kinetic energy?
- The 4.0 kg box shown below is accelerated from rest across a wood floor (u = 0.20) by a 30N pulling force for 2.0s. What is the box's final momentum?
- The tip of a tuning fork goes through 400 complete vibrations in a time of 0.570 s .?
- What are two types of kinetic friction?
- Steps, please?
- A new LCD high definition TV has a power consumption of 128 watts when operating at 120 volts. How much energy, in kilojoules, would be used in 2.5 hours?
- When kinetic energy increases ?
- A guy runs with speed of 40 m/s as he flies off a 100 m building, hoping to land on an 80 m building that is 100 m away Take g- 10 m/s.?
- Calculate the ground range resolution and azimuth resolution for a radar system which has the following parameters?
- Hello there, this is a question about electric motor I needed help with. I think I missed it when they were talking about it :) I totally forgot! Thanks!/?!
- When a wave is acted upon by an external damping force, what happens to the energy of the wave?
- Were any women involved in the development of the atomic model?
- Explain isothermal process with an example? in 2 marks definition got how much?
- In uniform circular motion no force acts along horizontal direction or along x direction but it's speed changes continuously along x direction why ?
- Mousetrap Car-Find Average Force of Snap-Please Help?
- A fisherman on weighing his fish inside the lift of a tall building, if he puts a 4.0kg fish onto his weighing machine.calculate the indicated weight when the lift is.a) stationary? b)accelerating upward at 2.5m/S^2?
- This is a question about the Doppler Effect I needed help with please. Thanks?!!
- Here is a question about Hooke's law I need help with. I don't think I did it right - as usual! Thanks!?!
- Water is in a decorative fountain is observed to broaden as it rises. Conversely, a stream of water falling straight down from a faucet narrows. Explain why, and discuss whether surface tension enhances or reduces the effect in each case?
- How is it possible that,photon doesn't have mass but it have momentum??
- A box of mass 10 kg is projected up an inclined plane from its foot with a speed of 20m/s making an angle of 37°with the horizontal.Coefficient of friction is 0.5.Find the distance travelled by the box before it stops for the first time?
- Force can change the shape of a ?
- Where would a bowling ball and a napkin fall with the same acceleration?
- Which is the smallest measuring unit?
- Can anyone explain the theory of relativity in simple terms?
- A baseball rolls off a 0.70 m high desk and strikes the floor 0.25m away from the base of the desk. How fast was the ball rolling?(Kinematic Equations)
- A bicyclist of mass #90# #kg# drives around a circle with a centripetal acceleration of #1.5# #ms^-2#. What is the centripetal force acting on the bicyclist?
- In physics we have studied that work done is independent of the path followed by the body, but in thermodynamics it is said work is path dependent why is this so?
- What does E=mc^2 state?
- Please help me find the amount of pressure. Thanks?!!
- What 5 uses of converging lens?
- Gauss's Law?
- Does light have mass?
- A pendulum swings from rest as shown in the diagram. Answer the following 2 questions regarding kinetic energy (KE) and potential energy (PE). Which point on the pendulum is the KE least and PE greatest? Which point on the pendulum is KE
- How will you prove that work done in isothermal process is always greater than adiabatic process?
- Find the angle of projection at which the horizontal range and maximum height of projectile are equal?
- How can we evaluate width of Maxwell distribution?
- How can we prove that if the velocity of body is half then kinetic energy becomes one fouth?
- Compute the x and y components of the vectors vector A , vector B , vector C , and vector D in the figure below (θ2 = 31°, θ3 = 23°, θ4 = 51°).?
- An insect of mass 'm' is initially at one end of a stick of length 'l' and mass 'M'.The coefficient of friction between the insect and the stick is 'k'. The minimum time in which the insect can reach the other end of the stick is 't', then #t^2#?
- Does light use any route to travel like we drive a car on road?
- What will be the percentage change in body when both its mass and velocity are doubled?
- A 5500 kg helicopter accelerates upward at 0.50 #m##/##s^2# while lifting a 1200 kg car. What is the lift force exerted by the air on the rotors? What is the tension in the cable that connects the car to the helicopter, ignoring mass?
- A male astronaut 82kg and a female astronaut 64kg are floating side by side in space. if they both reach out and push on each others shoulder with a force of 16N. What is the acceleration on both of them ?
- Why are studs made on he sole a football players boots?
- When greater energy release in nuclear fission or nuclear fusion reaction ?
- Two blocks of masses M1 and M2 are connected to a light string over a pulley.The blocks are at rest on inclined frictionless surfaces,and the effects of the pulley are negligible.which way and how far do the blocks move in o.750s after being released?
- How to calculate overall efficiency of an object?
- What is friction cone?
- How to solve for the missing values?
- Cannon ball shot out of a cannon at a 45 degree angle with an initial velocity of 230 meters a second. How high, how far, and how long does the cannon ball fly?
- Which type of motion is present in the process of churning of curd?
- What do all waves have in common?
- Sound waves and light waves are two dimensional or three dimensional?
- If a pendulum is shortened, does its frequency increase or decrease?
- How to calculate the time it takes to heat a given volume of material with a given temperature T1 when it is surrounded in a volume of hot oil with a temperature T2 ? Thanks!
- State Archimedes Principle?
- I need help to describe the time it would take earth to orbit the collapsed....please take a look at the picture. Thanks!?!
- How much heat is required to raise the temperature of 0.5kg of water from 20 degrees Celcius to 80 degrees Celsius?
- What happens when a bar magnet is cut in half?
- What is the height of 4th bounce?
- In 1 second, a light bulb transfers 3 joules to light energy and 57 J to heat. What is the energy input in 1 second? What is the efficiency?
- Which way will light bend if it encounters a medium through which it it travels faster? What if it travels more slowly?
- Does normal force depend on the densities of the objects(example: wooden block is on a table, densities of block and table)?
- A body of mass 2 kilograms moves on a circle of radius 5 meters, making one revolution every 8 seconds. Find the centripetal force acting on the body?
- Calculate the Ampere Hours (AH) capacity of battery when current is 2A and time is 90 Minutes?
- Determine the current Gain (ß) when #I_C=50 mA# and #I_B = 5 mA# ?
- A tennis ball is thrown from a height #h# above the ground. If the coefficient of restitution #e#, what height will the ball achieve after the third collision ??
- How to change values from volume to 1/vplume to plot a graph against pressure using boyles law ?
- When was the value of focal length is eqval to the value of image distance?
- How can I use Stefan Boltzmann law?
- Path of a projectile projected from the ground is given as y = ax-bx^2. What is the angle of projection, maximum height attained and horizontal range of the projectile?
- How does air pressure decrease as altitude increases?
- What is difference between acceleration, speed and velocity?
- Is there a relation between force work and energy?use an example yo explain.
- Find the moment of inertia of a solid circular cylinder of radius a, height h and mass m about the axis of the cylinder?
- How fast is acceleration if the only thing acting on it is gravity?
- If a 40 kg human is rolling 10 m/s what is their kinetic energy?
- How high is a .1 kilogram bird when its potential energy is 3 joules?
- The formula E=Pt gives the energy, E watt hours, used when an electrical appliance of power P watts is used for t hours. What is the energy used in this situation: A 1400-W blow dryer is used for 10 min?
- If someone puts their 40 kg sister at the top of a 20 meter tall hill and pushes her off how much kinetic energy does she have 5 meters into her fall?
- What is a 50 kg persons potential energy when they sit on a 3 m high ledge?
- Which has more kinetic energy a heavy bike or a light bike?
- What is the frequency of colour grey vs the frequency of the green for example?
- How to find the velocity of the car after collision?
- Physics: Choose the correct option “?”
- An electric heater works by passing a current of 100 A through a coiled metal wire, making it red hot. If the resistance of the wire is 1.1 ohms, what voltage must be applied to it?
- Does #ħE=m#?
- What is the difference between electric potential and electric potential energy?
- How can we derive Kirchoff's current law and Kirchoff's voltage law?
- Define an ohm?
- The body of a guitar is a hollow box. How does this help us hear the sound of the vibrating string?
- Show that the relative standard uncertainty of the period of a pendulum is #(DeltaT0) / (T0) = 1/2 (Deltal)/l # with #T0 = 2pisqrt(l/g)# ?
- A car accelerates from 5.0 m/s to 21 m/s at a constant rate of 3.0 m/s2, How far does it travel while accelerating?
- What is pascal law ?
- An airplane moving horizontally with velocity 80m/s at a height 122.5m drops a stone to the ground when and where the stone hits the ground?
- A fighter jet is flying in a tight circle with a radius of 250m. It makes one complete turn in 20 seconds. How fast is the plane flying?
- A body being to slide over the surface of another when pulled with a force of 10N.if we pull with a force of 5N, the force of friction that will come into play is?
- What are the nuclear reactions required to produce #""_""^239 Pu# from #""_""^238 U# under fast neutron bombardment?
- An object with an inertia of 80 kg and an acceleration of 6 m/s/s will have what net force on it?
- A 75 ohm light and a 150 ohm heater are connected in parallel to a 150 volt power source. What is the current through the 150 ohm heater?
- Four charges q1=7nC , q2=4nC , q3=3nC and q4=-5nC are placed at the corners of the square with side 2cm. Determine the potential difference between the center of the square and infinity?
- What kind of potential energy is when a ball is thrown into the air?
- Does air float?
- The frequency of the george washington bridge is 2.05 hz . what is its period?
- When the ferromagnetic substance is insertwd in a current carrying solenoid ,the magnetic field is (Greatly decreased or increased ) or (Slightly increased or decreased)?
- Two particles of mass m, constrained to move along the circumference of a smooth circular hoop of equal mass m, are initially located at opposite ends of a diameter and given velocities #v_o#. The entire arrangement is located in gravity-free space?
- An object has an acceleration of 14.9 m/s/s. If the net force experienced by the object is increased by a factor of 4.3 and the mass of the object is increased by a factor of 13.5, what would be the new acceleration of the object?
- What is weight of body if it dropped from 10 m height above the ground time taken 2 second?
- If a 90 lb boy is walking 4 mph and a 150 pound man is walking 3 mph, who is doing more work?
- A car travels in a straight line for 3.9 h at a constant speed of 79 km/h . What is its acceleration?
- Please solve this question ?
- Alan Shepherd hit a golf ball with a golf club on the moon with the speed of 25 m/s at an angle of 30° above the horizontal. How fast is the ball traveling when it reaches 25m above the surface of the moon?
- Using a megaphone, Mikmik shouted and was heard 4 seconds later by her friend, who was 1.2 km away from her. What was the speed of sound in the situation? Write your answer in meters per second.
- Why the reading of EMF buy a voltmeter is less than that by a Potentiom?
- An elevator with a mass of 1300 kg accelerates upward at 0.65 m/s/s. What is the force acting on the elevator's cables?
- A 6 kg sled is pulled with a force of 60N. At the same time friction acts on the sled with a force of 30N. Calculate the acceleration of the sled?
- A cat has a mass of 5646g and a velocity of 4.5 m/s. What is its KE?
- A car accelerates steadily starting at 8.5m/s. It’s average velocity is 34m/s. What is its final velocity?
- What is the frequency of a wave that has a wavelength of 0.4 m and travels at a distance of 78 meters in 10 sec?
- If a wave travels at a speed of 60m/s and has a wavelength of 1.2m, what is its period?
- What would the temperature (Kelvin) be of an Incandescent light bulb with 240/250V, 60W and 800+ lumens? Other details: 2500 hours. Thank you, Zoe
- Gauss' Law?
- Find the magnitude of the resultant (sum) of their two forces. What is the angle the resultant forms with Brianna's force?
- What are the units for friction?
- The diagram above is a frictionless roller coaster. the mass of the car at point A is 3.26 kg. The gravitational potential energy at point A is ____ Jules ?
- How much work in joules was done to increase the velocity of a 19.7 kg ball from 2 m/s to 4 m/s?
- How can I figure out if a ballistic thrown in space with the velocity of 40m/s and a mass of.1kg how far will it go?
- What is the speed of a wave with frequency 5.50 Hz and wavelength 2.25 m?
- Two forces pull a body in different directions,8.0N forces acts along the negative y-axis and 5.0N force acts at 30 degrees above the positive x-axis.find the magnitude and direction of the resultant force?
- A 2 kg book is held against a vertical wall. The coefficient of friction is 0.45. What is the minimum force that must be applied on the book, perpendicular to the wall, to prevent the book from slipping down the wall?
- A plane cruising at 267 m/s accelerates at 21 m/s 2 for 8.2 s. What is its final velocity?
- A ball is whirled on a string, then the string breaks. What causes the ball to move off in a straight line?
- Compare the distance covered by a stone in a second on the Earth and on the Moon ?
- What does the slope represent in v & i relationship?
- When is the angle of contact between a liquid and solid interface equal to 90 degrees?
- An object of mass m1 has a kinetic energy K1 . Another object of mass m2 has a kinetic energy K2 . If the momentum of both objects is the same, what is the ratio of K1/K2?
- If a body is projected vertically up it's velocity decreases to half of its initial velocity at a height 'h' above the ground The maximum height reached by it is ? Ans:4h/3
- A runner completes 1 lap around a 400-m circular track. what is the distance traveled by the runner? what is his or her displacement?
- A cyclist travels from a to b at a speed of 16 kilometre per hour and back from b at 24 km per hour if the total time taken is 5 hours find the distance of ab?
- What is the kinetic energy of a bullet of mass 40kg which travels with the speed Of 100meter per second ?
- A slingshot is used to launch a stone horizontally from the top of a 25.0 meter cliff. The stone lands 33.0 meters away. A. At what speed was the stone launched? B. What is the speed and angle of impact?
- What is an MRI? How does it take the pictures of our brain? What materials are used for it?
- What is the the wavelength in centimeters of A VOR (radio navigation aid) transmitting at 114.10 kHz?
- A 68.5 kg skater moving initially at 2.40 m/s on rough horizontal ice comes to rest uniformly in 3.52 s due to friction from the ice. What force does friction exert on the skater?
- A block is being pushed forward across a frictionless surface at an angle #25°# from the horizontal. The block's mass is #15# #kg# and its acceleration is #9# #m##/##s^2# in the positive x-direction. What is the force acting on this block?
- An ambulance has a siren producing sound waves of frequency 2000 Hz and moving towards a listener standing on a bus stop. If the frequency heard by him is 2150 Hz. Find speed of ambulance. (Speed of sound 340 m/s)?
- Calculate the wave length of sound wave who frequency 20hz and speed id 440 meter per second in a medium?