# 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
- Four identical metallic objects carry the following charges: +1.6, +6.2, -4.8, and 9 .c. The object are brought simultaneously into contact , so that each touches the others. Then they are seperated. (a) what is the final charge on each object?
- Why a free proton in nuclear physics is always assigned by 1H1(mass no 1 &atomic no1) and whenever proton mass is used,mass of 1H1 is written, what is the reason?
- A car accelerates uniformly at a rate of 2.8 m/s^2. How long does it take for the car to accelerate from a speed of 12.7 m/s to a speed of 19.3 m/s?
- An object starts from rest and falls freely. What is the velocity of the object at the end of 3.00 seconds?
- Show that the nuclear density of 1H1(mass no-1&atomic no-1)is over 10^14 times greater than its atomic density (assume the atom to have the radius of the first Bohr orbit).In this question,what should I put for nuclear mass&atomic mass?
- How do i find the units in a math problem?
- What is the proof for a diffraction grating formula #dsintheta=nlamda#?
- Physics motion question!?
- Let U=[-1,2,5].find all scalars k such that ||kU||=4?
- Calculate the work done by a 47 N force pushing a 0.025 kg pencil 0.25 m against a force of 23 N?
- A 10,000-watt radio station transmits 535 kHz. What is the number of joules transmitted per second?
- An iron rod of length 100m at 10°C used to measure a distance of 2km on a day when the temperature is 40°C. Calculate the error in measuring the distance?
- How are maglev trains able to go so fast?
- What is the acceleration of a body moving with uniform velocity?
- A circular coil (10 turns, diameter = 25 cm) is placed perpendicular to a uniform magnetic field (B = 2.7 x 10-3 T). If the direction of the magnetic field is reversed in 0.30s, what is the average emf induced in the coil?
- A man weighing 100kg on the earth is found to weigh 101kg when on the space ship .What is the velocity of the space ship ?
- A rod 1m long moves with a velocity of 0.6c.Calculate it's length as it appears to an observer on the earth?
- A rocketship 100m long on the earth is moving with 0.9c.How much it's length will appear to an observer on the earth?
- At time t, the position of a body moving along the s-axis is m. Find the body's acceleration each time the velocity is zero?
- A 0.145 kg baseball is moving at 35 m/s it is caught by a player. What is the change in momentum of the ball?
- A boat can travel from its dock to a town downriver with a 7 mph current in 10 hours. The return trip against the same takes 15 hours. What is the speed of the boat in still water?
- The bulk modulus of lead is #4.6# GPa. By what fraction will the density of a piece of lead increase if it is lowered to the bottom of the Pacific Ocean where the pressure is #40# MPa?
- Two point charges 4*10^-6C and 2*10^-6C are placed at the vertices A and B of a right angled triangle ABC respectively. B is the right angle, AC=2*10^-2 m and BC=10^-2m. Find the magnitude and direction of resultant electric intensity at C?
- A cubical box consists of 4 square sides and a square base but has no top. The sides and the base are all made of thin sheet metal of uniform thickness. If the edges of the box are all 200 mm in length, how far above the base is the box’s centre of mass?
- A great conical mound of height h is built by workers. If the workers simply heap up uniform material found at ground level, and the total weight of the finished mound is M, show that the work they do is (1/4)hM?
- What force can be felt when you put your hand out the window of a moving car?
- Ordinary boron is a mixture of 10B5(mass no=10,atomic no=5)&11B5(mass no=11,atomic no=5)isotopes & has a composite atomic mass of 10.82u.What percentage of each isotope is present in ordinary boron?
- If a 75 kg person on a 15 kg sled is pushed with a force of 900 N, what will teh person's acceleration be?
- Calculate the angular frequency of the system shown in the figure. Friction is absent and threads are massless? Hint: The system performs SHM. Try not to use the energy conservation method.
- A copper wire has a diameter of #0.5mm# and resistivity of #1.6*10^-8Omegam#. What will be the length of this wire to make its resistance #102Omega#?
- A car accelerates uniformly from rest along a straight road until it reaches #50ms^-1#. Once this speed is reached it immediately starts to decelerate uniformly until stationary again. If the total distance travelled is 600m, how long does journey take?
- Is it possible to accurately approximate the speed of a passing car while standing in the protected front hall of the school?
- An 80 -lb and a 100-lb child are balancing a seasaw. The 80-lb child is 5ft from the fulcrum. How far from the fulcrum is the child 100 l-lb?
- In simple harmonic motion of a spring, how does increasing the mass affect the amplitude and what equations do I use to prove it?
- What is the actual source of earth's magnetic field?
- Does amplitude of a spring mass system change when mass is added?
- A boat travelling at top speed upstream moves at 15 km per hour. When it travels downstream, again at top speed, it moves at 25 km per hour. What is the boat top speed in still water?
- how much heat energy is needed to change 100 g of ice at 0 ⁰C to water at 30 ⁰C?.
- Wich of the following is a vector? A. 20 N west B. 42`C C. 3:15 pm D. 5 km down E. 20 m/s west F. 30 m/s to the right
- Physics and calculus?
- A block of mass 5 kg is at rest on a ramp which is at 25◦. The coefficient of static friction between the block and the slope is 0.4. What is the minimum magnitude of the horizontal force, F, that is required to make the block move? Assume #g=10ms^-2#
- When we double the voltage we double the------?
- What is the reason behind the fact that natural systems always tends to evolve towards configuration of minimum potential energy?
- Why test charge is positive?
- What are the number of joules required to raise the temperature of 1000 g of ethyl alcohol by 15 degrees celcius?
- The threshold frequency of silver is 9.71×1015 Hz. What is the work function of silver?
- The radius of a spherical soap bubble increases @ 0.2 cm per second find the rate of increase of its surface area when the radius is 7 cm?
- An athlete whose weight is 800N runs a race with acceleration of 5 metres per second square. What is the force that the athlete ran with?
- An electron with a velocity of #1×10^7 ms^-1# enters a magnetic field of strength #10 T# aligned perpendicular to the direction of motion of the electron. Calculate the radius of the orbital path that the electron now follows?
- The end of two thin steel rods of equal length are welded together to make a right angled frame. Locate the frame's center of mass?
- The resistance of a 20 cm long wire is 5 ohms stretched to a uniform wire of length 40 cm. What is the resistance of the wire?
- An object has a kinetic energy of 500 J due to its linear motion. What would be the kinetic energy of an object with half the mass and twice the momentum?
- The figure shows three circuits I, II and III which are connected to a 3V battery. If the powers dissipated by the configurations I, II and III are P 1 , P 2 and P 3 respectively, then =?
- A car was travelling with a speed of 80 kph covers the same distance in 3 hours as a truck travelling with a speed of 60 kph does how in many hours?
- The highest-pitched sounds most humans can hear have a wavelength of .017 m in air. What is the frequency of these sound waves if the speed of the wave is 340 m/s?
- Question #4802e
- An electron is moving to the east at a speed of #1.8*10^6 m/s#. It feels a force in the upward direction with a magnitude of #2.2*10^-12N#. What is the magnitude and direction of the magnetic field this electron just passed through?
- Who came up with the planetary model: Rutherford or Bohr?
- A rocket with a total mass of #20 kg# will take off with an acceleration of #12 ms^-2# if it is launched so that its trajectory is vertically upward. a) Calculate the force produced by the rocket engine? (please check below for part b)
- Can you please explain what is the refrance point os this example??
- How much energy is required to melt #7.3g# of ice at #0^circC#?
- A particle starts from rest and moved in a straight line the velocity of the particle at time t after start is v m/s where #v= 0.01t^3 +0.22t^2 -0.4t# Find the time at which the acceleration of the particle is greatest?
- A point moves in X−Y plane according to X=a sin(wt) and Y=a (1−cos(wt)). What path will the particle follow?
- A sound wave with a frequency of 2.0 kilohertz is traveling through the air at stp determine the wavelength?
- A particle P moves in a straight line. Velocity v ms^-1 at time t s is given by #v=5t(t-2)# for #0<t<4# #v=k# for #4<t<14# #V=68-2t# for #14<t<20# Find the set of values of t for which acceleration is positive?
- A box A of mass 0.8kg rests on a rough horizontal table and is attached to one end of a light inextensible string. The string passes over a smooth pulley fixed at the edge of the table. (see ? below)
- Why gravitational potential energy always have a negative sign?Also explain the graph of variation of gravitational potential energy with distance r from the centre of the earth?
- Can anyone help me with 9709 may/June/2017 paper 43 Question number 7 part (ii) I have found velocity and acceleration as #v=1.68# and #a=2.83# I don't understand how it will move further?
- A stationary ball weighing 0.25 kg aquires a speed of 10m/s when hit by a hockey stick. What is the impulse imparted to ball?
- A strong lightning bolt transfers about 30 C to earth. How many electrons are transferred?
- What is an example of a nonideal oscillator?
- Why are tension values different on a pulley with two masses?
- Determine the inductive reactance when a #30.0" mH"# inductor with a negligible resistance is connected to a #1.30xx10^3" Hz"# oscillator? Thanks
- What is the combined resistance of a 6 ohm resistor which is connected in series with a parallel arrangement of two resistors, each resistance of 2 ohm? Thanks
- If P+Q=R and if Q is doubled and R is doubled then find Q? Note. P ,Q And R are vectors each
- A solid weighs 32 gf in air and 28.8 gf in water. What is the relative density of the solid?
- Help with physics"(?)"
- Three forces P, Q and R act at the same point and are in equilibrium. The forces P and Q have magnitudes 30 N and 20 N respectively, and there is an angle of 20° between their directions. Calculate the magnitude of the force R?
- A tube filled with mercury has a resistance of 15ohm at 0 degrees, if the tube is heated up to 65degrees what will be the resistance? Take the tube temperature coefficient of resistance as 0,0042ohm/degree
- A pulley system with 75% efficiency is set up to lift a 21kg bag of nails. The bag is lifted to a height of 2.3m by a person pulling on the rope with a force of 91.5N. What is the mechanical advantage of this pulley system?
- A conical tank is buried 1 foot underground with the apex pointing up, base down. The height of the cone is 5 ft and the radius is 6 ft. It is filled with liquid with density k pounds per cubic foot. Work involved in pumping the fluid to ground level?
- What is an example of an electric field practice problem?
- If a copper wire is stretched to make its radius decrease by 0.1%, then the % increase in its resistance is approximately?
- Please help me with question number 6 part (i)?
- A press machine is required to punch out discs of 40 mm diameter from steel plate 1.5 mm thick with a shear strength of 200 MPa. Calculate the compressive strength in the punch.?
- Six identical particles each of mass ‘m’ are arranged at the corners of a regular hexagon of side length ‘L’. If the masses of any two adjacent particles are doubled. The shift in the centre of mass is???
- The Moon has a radius of #1737 km# and the gravitational acceleration at its surface is #1.62ms^-2#. Assuming that the Moon is a sphere of uniform density, what is its density?
- Mechanics help?
- Anna walks up the stairs on her way to class. She weighs 565 Newtons, and the stairs go up 325 meters vertically. What is Anna's power output if she gets to the top of the stairs in 12.6 seconds?
- What is the final velocity of the lighter object? (See below)
- Hi can someone help me find this calorie equation?
- When wave enter from rarer to denser medium it undergoes path difference of how many???
- Two forces, A and B, have a resultant C. (In other words A + B = C, as vectors). If A = 5 N, B = 7 N and C = 8 N, what is the angle between A and C?
- Why do objects in free fall appear to be weightless?
- Find # i# for #t>0 # if the circuit is in steady state at # t=0# ?
- If speed of a body is increased by 1 percent...what is the change in its kinetic energy?
- The acceleration of gravity near the surface of Mars is 3.72m/sec^2. A rock is thrown straight up from the surface with an initial velocity of 23m/sec. How high does it go? (Hint: When is the velocity zero?) Thank you!!!
- A semiconductor has a band gap of 1.5 eV. What is the minimum wavelength in nm required to promote an electron from the valence to the conduction band?
- A shell fired from a gun has a horizontal range of 1200 m and a flight time of 10 s. What is the magnitude and direction of the velocity of projection?
- Once a sound recording is made, how is the sound reproduced?
- A hypothetical particle has a mass 512eV/c^2.If such a particle at rest decays into two gamma-rays photons, what is the wavelength of each photon?
- Calculate the tensile stress in a nylon fishing line of diameter 0.36 mm which a fish is pulling with a force of 20 N?
- Integer type answer?
- The vector sum of the forces of 10N and 6N can be?
- A particle P moves in a straight line starting from point O with velocity #2#m/s the acceleration of P at time t after leaving O is #2*t^(2/3)# m/s^2 Show that #t^(5/3)=5/6# When velocity of P is #3#m/s?
- A 12V car battery can move 200 C of charge in the time it takes to start a ca. How much energy does it take to start a car?
- Help with physics"(?)"
- What's the value of 57.281 joules in Btu?
- A simple pendulum has length 20cm.it was displaced at an angle 15° and then released to execute simple harmonic motion. How much time is required for the pendulum to reach maximum speed?
- Which has more kinetic energy, a 4.0 kg bowling ball moving at 1.0 m/s or a 1.0 kg bocce ball moving at 4.0 m/s? Why?
- An object performs simple harmonic motion between points k an L with a period 40pi if the distance between k and L is 10cm what is the speed of object when it is 8cm away from equilbrium position?
- What is the energy of a gamma ray photon whose frequency is #5.02 \times 10^20# Hz?
- Why does the Doppler effect occur?
- How to convert from #(dyn)/(cm)^2# to #N/(m)^2# ?
- Velocity time graph problem?.
- Frictional force is non Conservative force.How?
- What is the kinetic energy (in kJ) of a 2.50 kg ball traveling at a speed of 600 m/s?
- How much kinetic energy is lost in the collision? (See full question below)
- It is question about forces and equilibrium ?
- When is the net torque about a point 0?
- For the following problems, you can assume that the speed of sound is 340 m/s. If the frequency of an electromagnetic wave is 2.147×109 what is the wavelength?
- How many two input NAND gates are required to perform the action of a two input OR gate?
- A force produces an acceleration of 1.5 m/s^2 in a disk. Three such disks are tied together and the same force is applied on the combination. What will be the acceleration? (Ans:- 0.5m/s^2)
- A projectile is fired with initial speed v0 = 37.0 m/s from level ground at a target that is on the ground, at distance R = 13.0 m, as shown in the figure. What are the (a) least and (b) greatest launch angles that will allow the projectile to hit the ?
- What angle yields the maximum possible range for a projectile?
- How does Gauss Law work inside a conducting sphere?
- What uses sound waves to locate objects underwater?
- Two forces of magnitude 10and3n are acting at an angle other than zero which of yhe following cannot be their possible suma) 13 N b) 9N c)7N d)12N?
- A force of 4.0 N acts on a body of mass 2 kg for 4 secs. Assuming the body to be initially at rest , find the distance covered in 10 sec after the force starts acting? (Ans:- 64 meter)
- In harmonic oscillator transition from ground state to second excited state is forbidden, why?
- Deciding current in a circuit?
- A helicopter ascending upawards throws a stone downwards. Is the displacement or velocity of the stone negative?
- An object 20cm high is placed 45cm from the lens of focal length 15cm? calculate the image distance and the size of the image and the nature of the image? If a concvex lens and a concave lens is used.
- A room is at a constant temperature of 300 K. A hotplate in the room is at a temperature of 400 K and loses energy by radiation at a rate of P. What is the rate of loss of energy from the hotplate when its temperature is 500 K?
- Find the position #s# as a function of time #t# from the given velocity #v= {ds}/{dt}#. Then evaluate the constant of integration so that #s=s_0# when #t=0#. #v=8(s)^(1/2), qquad s_0=9# Help please?? and thank you!!!
- What is the difference between a law and a theory?
- Question is about finding force etc.?
- Which person has a higher linear velocity?
- Please answer it in a sentence from the picture below?
- Limiting equilibrium means #ma=0# In #F-f=ma# ?
- An electric motor can usefully convert 18 J of energy each second into kinetic energy to raise a mass above the ground. The motor has an input current of 2.5 A and an operating voltage of 16 V. Calculate the efficiency of the motor?
- A ball has a kinetic energy of 100 J. What would be the kinetic energy of a ball with twice the mass and half the momentum?
- In a television tube, electrons are accelerated by a high voltage, and strike the screen with an average velocity of 4.04x10^6 m s^-1. Calculate the average de Broglie wavelength (in nm) of the electrons?
- For the following problems, you can assume that the speed of sound is 340 m/s. In space a wave has a frequency of 1.151×10^14 Hz, what is the wavelength?
- On an alien planet, a ball is thrown vertically upwards from the ground, rises to a height of 100 m, and then falls back to the ground. The total time is taken from when the ball was thrown upwards to when it reached the ground again, is 10 seconds.....?
- What is the force of gravitational attraction between a man (mass 70 kg) and the Earth?
- Two runners leave the starting gate, one running 12 mph and the other 10 mph. If they maintain the pace, how long will it take for them to be one-quarter of a mile apart?
- What is the speed of an EM wave in space that has a frequency of 2.328×10^17 Hz? For the following problems, you can assume that the speed of sound is 340 m/s.
- A capacitor of capacitance C has a charge of Q stored on the plates. The potential difference between the plates is doubled. What is the change in the energy stored by the capacitor?
- The waves that carry the most energy are the waves that?
- Electric Field lines point in the direction a negative charge would move. True or False?
- A cat pushes on a .25kg mouse toy for 3.0 seconds, resulting in a velocity of 18 m/s. The force of the cat was how many N?
- Suppose that an airplane flying 60 m/s, at a height of 300m, dropped a sack of flour. How far from the point of release would the sack have traveled when it struck the ground?
- A car going 50km/h accelerates to pass a truck. Five seconds later the car is going 80km/h? What is the acceleration?
- How long will it take a car to accelerate from 14.2 m/s to 24.5 m/s if the car has an average acceleration of 2.2 m/s^2 ?
- A body of mass 5kg is moving with a momentum of 10kgms-1.A force of 0.2N acts on it in direction of motion of body for 10sec.The increase in kinetic energy is?
- If #hat a# and #hat b# are unit vectors that make an angle of 60 degrees with each other, calculate?
- What is the work done by a 47 N force pushing a 0.025 kg pencil 0.25 m against a force of 23 N?
- What is the force, in terms of Coulomb's constant, between two electrical charges of #6 C# and #4 C# that are #2 m # apart?
- The amount of heat required to heat 1.5 litres of water from 30C to 75C is?
- The uncertainty in the values for specific heat capacity is 5%. Water of mass (100+-2) g is heated from (75.0+_0.5)C to (85.0+-0.5)C. (i) Calculate the energy required to raise the temperature of the water from 75C to 85C.?
- A light beam is reflected off the edge of an optic fibre at an angle of 0.0042o . The diameter of the fibre is 69 µm. Find the equation of the reflected beam with the -axis (at the centre of the fibre) and the yaxis as shown?
- A basketball player stands 15m away from the basket to make a 3-point shot. The basket is 3m (10 ft) above the ground. Assume the ball leaves the player's hands at a height of 2m, and with velocity vector Vo=(Vox, Voy)?
- Can I know how to solve this physics question?
- A convex mirror of focal length 10cm is kept at a distance of 30cm front of a 4cm high object.Find the height of the image of the object?
- The displacement of a body is given by r=√(a^2-t^2)+tcos t^2, where a is constant. Find velocity?
- A sailboat is pushed with a linear drag coefficient 83 g/m by wind blowing at a speed 2.97 m/s, while being slowed by a quadratic drag with the still water of 105 g/s. What is the cruising speed of the sailboat?
- What is transformer?
- Question #d1832
- A black body has absolute temperature T and surface area A. The intensity of the radiation emitted by the body is I. Another black body of surface area 2A has absolute temperature 2T. What is the intensity of radiation emitted by this second black body?
- The particle p is released from rest at the top of a smooth plane inclined at angle a where sina=16/65.the distance travelled by P from top to bottom is S metres and speed of P at bottom is 8ms^-1 find S and hence speed of P when it has travelled 1/2S?
- Every 2 seconds, a coal fired power plant produces enough electricity to do 9X10^8 J of work. What is the plant's power output? *
- Can someone answer this physics question?
- A plane of mass 50000 kg requires a path of 1500 m to reach 180 km\hr find: the acceleration the engine force?
- For λ = 5.0 X 10^5m calculate the (i) fractional uncertainty in d. (ii) percentage uncertainty in d^2 ?
- If a 60 kg person on a 15 kg sled is pushed with a force of 300 N, what will be person's acceleration?
- For derivation of equation for stationary wave, y1=Asin(kx-omega t) and y2=Asin(kx+omega t) are considered. Why y1=Asin (kx-omega t) and y2=Asin(kx+omega t+pi) cannot be used to derive?
- How do i do this simple harmonic motion?
- Solve the question ?
- A satellite is placed in synchronous orbit around an exoplanet of mass 44⨯10^24 kg and radius 18⨯10^6 m. If the planet's day is 87.8 hours, at what altitude should you place the satellite?
- Mechanic help?
- What is simple harmonic motion, types and characerstics?
- A plane flies at a speed of 350 miles per hour. How far will it travel in 3 hours?
- A squirrel jumps into the air with a velocity of 7 m/s at an angle of 20°. What is the maximum height reached by the squirrel?
- The wagons wheel revolves at 45 revolution per minute. the radius of the wheel is 30cm. what its linear velocity?
- In which condition time speed and time velocity graph are similar ?
- I am using V+E-Ir. But I can't get the answer yet as 05 or 0.6 ohm? How?
- What is mechanical energy?
- Urgent. Please help. Calculate the percentage uncertainty for the displacement when t = 40s?
- How do I found the value of b? The answer is 4.7×10^4 to 5.3×10^4
- What will be the resistivity of a metal wire of 2 m length and 0.6 mm in diameter, if the resistance of the wire is 50 Ω.??
- The total power output of the sun is 3.84x10^26w. What is the intensity of sunlight at a distance of 1.49x10^11m?
- How do I get the angle tita ? The answer is 22 degree for the angle. The ratio of T/T(zero) is 1.01. Is it from the graph? But how?
- If an object has a mass of 50 kg, what is its weight?
- A coffee maker heats 2 kg of water from 15 Celsius to 100 Celsius. how much thermal energy was required?
- Angular speed of hour hand of a clock in degree per second ?
- Is Electric potential and e.m.f are same or different terms?
- An automobile changes energy into different forms. The total amount of energy does not change due to the __________ ?
- A firework rocket takes off vertically with an acceleration of #20ms^-2# and maintains that acceleration for 5 seconds after which the rocket stops burning. Find (a), (b) and (c), below?
- As more lamps are put into a parallel circuit, the overall current in the circuit?
- An object of unknown mass M is moving at 5m/s when it collides with a spring that brings it to a stop in 3 seconds. As it does so the force of the spring as a function of tie is recorded in the graph below. What is the mass?
- Two particles of masses 3kg and 5kg are kept 6m apart. Heavier mass is moved away from the lighter mass by 3m. How much should the 3kg mass be shifted so that the centre of mass of the system shifts towards 3kg mass by 25cm?
- Sound waves can travel through what types of mediums ?
- What is the explanation behind St. Elmo's fire?
- 7. An 8-gauge iron wire with n=1.7 x 10^29 m-3 is 1.99 mm in diameter d can carry a maximum current of 24 A. Find the drift speed of the electrons at this maximum current?
- Green light has a wavelength of 0.00000052 meters. Speed of light is 300,000,000 m/s. What is the frequency of green light waves and what is the period?
- What does the word refraction mean?
- A 20-kg girl and a boy on ice skates stand at rest facing each other. They push each other as hard as they can, and the boy moves to the left with a velocity of 2 m/s, while the girl moves to the right with a velocity of 3 m/s. (a) What is the boy's mass?
- You throw a football straight up into the air with a speed of 12.2 m/s. How high does the ball go?
- A 20 kg shopping cart moving at a velocity of 0.5 m/s collides with a store wall and stops. What is the momentum of the shopping cart?
- The speed of sound in air at 27degress is 340m/s.The speed of sound at temperature of 927degress is?
- 2 kg and 4 kg are held with a compressed spring between them. If the masses are released,. If the smaller mass moves off with a velocity of 6m/s, what is the stored energy in the spring when it is compress ?
- In nuclear fission, a nucleus of uranium 238, which contains 92 protons, can divide into two smaller spheres, each having 46 protons and a radius of 5.90 10-15 m. Find the acceleration of each nucleus at the instant in which fission occur?
- Ocean waves are hitting a beach at a rate of 3.5hz. What is the speed of the waves if the distance between wave crests is 1.3 meters?
- How much heat, in joules and in calories, must be added to a 75.0-g iron block with a specific heat of 0.449 J/g °C to increase its temperature from 25 °C to its melting temperature of 1535 °C?
- Mechanics, help?
- A particle moves along a line so that its displacement at time t≥ 0 is given by s(t)=2t^3-24t+1, where s is measured in meters and t is measured in seconds. At what values of t does the particle change direction? Thank you!
- What is science?
- How to find potential from 2 charges through 4 points?
- What is the ratio of momentum @ M and N? (No friction)
- Two charges #+1*10^-6# and #-4*10^-6# are separatd by a distance of 2 m. Where is the null point located?
- In a certan region of space the gravitaional field is given by -k/r where r is the distance and k is a constant. if the gravitational potential at r= a be v then what is the expression for gravitational potential ?
- In a shuffleboard game, the puck slides a total of 12m on a horizontal surface before coming to rest. If the coefficient of kinetic friction between the puck and board is 0.10, what was the initial speed of the puck?
- It is now known that protons and neutrons are themselves build out of elementary units called quarks. The up quark (u) has charge #+(2e)/3# and down quark (d) has charge #-e/3#. What can be the composition of proton and neutron?
- A moving object has the K.E=100 J and the momentum p=50 kgm/s. What is its mass?
- Any physics expert online? See the attachment below.
- A device operating at a potential difference of 1.5 volts draws a current of 0.20 ampere. How much energy is used by the device in 6.0 seconds?
- On a track of length 100km, the train covers first 20km with a constant speed 30km/hr. What should be the speed of the train for the next 70km so that the average speed of the train remains 50km/hr for the entire trip?
- If Chris throws the baseball 16 m in 4 seconds where is the average speed of the baseball?
- I tried using the formula. But I still didn't get the answer which is 1. How am I suppose to calculate please?
- What conditions are necessary for acceleration to occur?
- How is pitch controlled by frequency?
- A car is moving with a constant velocity 30m/s. What is the speed of the car after 10s?
- A box on the floor with a mass of 2 kg is under the effect of forces F1, F2 and F3 as it shows below. If the box moved a distance of 3 m. Calculate the work done on the box? HELP please.
- What two ideas are used to describe the motion of light?
- A pelican dives downward from a height of #35# #m# with an acceleration of #9.8# #m##/s^2# to grab a sardine at the surface of the ocean. How long does the dive take?
- A ball is dropped from a high rise platform at t=0 starting from rest.After 6s another ball is thrown downwards from the same platform with a speed 'v'.The 2 balls meet at t=18s.What is the value of 'v'?
- A car travels 600 m in 30 s. What is its average speed? Why is its actual speed usually different from its average speed?
- Vector #-hati+hatj-hatk# bisects the angle between vectors #3hati+4hatj# and #vecc# find #vecc#?
- Are they both right? why?
- In class we are learning about work; why does the force and motion have to go in the same direction?
- What will be the answer???
- Magnetic field question, please help?
- What kind of energy does the skier have at the top of a slope? Which forms of energy is it transforming into as the skier moves down the slope?
- What is the angle made by 3 i ˆ + 4 j ˆ with x-axis ?
- When a red filtered light is shown on a red flower, why does the leaves look black?
- The step-up transformer, is inincreases the input current or voltage?
- Maria bicycles 8 km/h faster than Carlos. In the same time it takes Carlos to bicycle 54 km comma Maria can bicycle 78 km. How fast does each bicyclist travel?
- Can you use Newton's third law to explain why a blown up but untied balloon will fly around the room when you let it go?
- An ideal gas is enclosed in container. Upon heating, which property of the gas doesn’t change? A) Volume B) Pressure C) Average speed of the molecules. D) The rate of collision of the molecules with each other
- Sound waves are two dimensional or three dimensional?
- A sound wave has a wavelength of 5.5 m in its travel through air at S.T.P with speed 330m/s. What is the wavelength of sound in the medium? where its speed is 1324 m/s.
- What does 80 Hz mean?
- If wheem is turning at 3.0rad/s,the time it takes to compelete one revolution? a) 0.33s b)0.67s d)2.1s
- If the index of refraction of a lens is 1.5, how fast does light travel in the lens?
- What quantity describes the ability of a force to rotate an object? How does it differ from a force? On what quantities does it depend?
- An airplane covers a certain distance at a speed of 320km/h in 7.5 hours. calculate the distance travelled by the plane in m/s?
- Why is the voltage across a bulb the same as the battery in a series circuit?
- The process in which Charles law is applicable is called a)isobaric b)isochoric c)isothermal process?
- If the atmospheric pressure is 101 kN/m^2 , what is the absolute pressure of water at depth of 12 m below the surface?
- The speed of a radio wave is given to be 300000000 m/s. The waves sent by the radio station "97.1 The Fan" have a frequency of 97000000 Hz. What is the wavelength of the radio waves?
- You start off from home and drive to your friends place. you left home at 2 pm, and arrived at her place at 2:40 pm. your odometer says that you have driven 25km. what was your speed in km/h?
- A person crosses a 174m long bridge in 45 seconds. what is his speed in km/h?
- An ideal gas is enclosed in a vessel of volume #V_0# fitted with a piston of cross-sectional area #A# and mass #M#. The piston is slightly depressed and returned. Find the frequency of vibration of the piston?
- A table clock has its minute hand 9 cm long. What is the average velocity of the tip of the minute hand (a) between 3 am to 3:30 am and (b) between 3 am to 3 pm?
- Why does resistance decrease when resistors are added in parallel?
- Could you please double check this answer and tell me where I went wrong?
- When a skydiver with a mass of 100kg is falling in a prone position (spread eagle) at terminal velocity (max speed) towards the earth. What is the magnitude of the drag force action on the skydiver?
- Any physics expert online? See the attachment. Thanks :)
- What are three examples of the Doppler effect in nature?
- Consider two displacements, one of magnitude 6 m and another of magnitude 8 m. What angle between the directions of this two displacements give a resultant displacement of magnitude (a) 14 m, (b) 2 m, and (c) 10 m ?
- Please explain ? Question 21.
- What is the force acting on an alpha particle traveling at 2V parallel to a magnetic field of strength 2B?
- I tried using change in momentum. How can I find Fmax?
- A bus is begins to move with an acceleration of 1 m/s2. A boy who is 42m behind the bus starts running at 10 m/s towards the bus. After what time bus will cross the boy?
- A 5500-kg freight truck accelerates from 4.2 m/s to 7.8 m/s in 15.0 s by the application of a constant force. What change in momentum occurs?
- A body is projected vertically from the ground.At a height of 20m the ratio of its potential energy and kinetic energy are in the ratio 1:3 .the height at which the above ratio becomes 5:11 is?
- .Convert these lengths to metres?
- A block of cubic zirconia is placed in water (n = 1.33). A laser beam is passed from the water through the cubic zirconia. The angle of incidence is 50 deg, and the angle of refraction is 27 degrees. What is the index of refraction of this cubic zirconia?
- How does the kinetic energy change when a liquid is cooled gradually?
- What is the value of m?
- A piece of ice (heat capacity #= 2100J kg^(-1 @)C ^-1# and latent heat #= 3.36 xx 10^5 J kg^-1#) of mass #m# gram is at #-5^@C# at atmospheric pressure. It isgiven #420 J# of heat so that the ice starts melting. Finally when the ..........?
- AP Test: Waves: Why is this answer correct?
- Could you please answer Q.5 ?
- 9. a fish rests on the bottom of a bucket of water while the bucket is being weighed when the fish begins to swim around in the bucket , how does the reading on the scale change?
- If a water wave has a wavelength of 1.0 m and a frequency of 2.0 Hz, how long will the wave take to travel 20. m from a boat to the shore?
- How can electrons in an atom be moving around the nucleus forever?
- A particle has an initial position vector of (−11 i + 15 j) m with respect to an origin O. If the particle moves with a constant velocity of (−10 i − 14 j) m/s, what will be its position vector after 9 seconds?
- A person walks 25.0° north of east for 3.10 km. How far due north and how far due east would she have to walk to arrive at the same location?
- At 10 am a ship is at location S, position vector (−6 i − 3 j) km, and is moving with velocity (2 i − 9 j) km/h. If the ship continues with this velocity what will be its position vector at 4 pm? position vector (km) =
- Help! Please?
- A .580kg rock is tied to the end of a string and is swung in a circle with a radius of 0.500 meters. The velocity of the rock is 4.50 m/s. What the centripetal force acting on the rock?
- Two similarly charged spheres A and B separated by a distance 'r' with force of 2×10^-5N. A third identical uncharged sphere C is touched to A and then placed between a mid point of A and B. Calculate net electrostatic force on C?
- Gravitation question?
- What is period relating to light waves?
- A motorcycle of weight 2000N accelerates from 0 to 25m/s in 6 seconds. What are the magnitudes of a. acceleration? b. mass of motorcycle c. Net force causing the acceleration? (Hint: mass=weight/acceleration due to gravity(g)
- Find the binding energy of , whose atomic mass is 12.019 u?
- What was created first: energy or matter?
- Rectilinear motion 1.A car travels at 40km/hr for 2hrs, at 50km/hr for the next 3 hrs and finally at 30km/hr for 1hr. Find; a. The total distance traveled by the car in km b. The average speed of the car in km/hr and m/s?
- Given the electrical potential energy, how do you calculate electric potential?
- What is the solutions of the problems ?
- Is it true that all bodies and objects on the earth's surface are in circular motion due to the earth's rotation?
- A 2000 kg car travels at a speed of 20m/s. Find its kinetic energy?
- A 20kg mass travelling to the right at 4ms^-1 collides with a 4kg mass travelling to the left at 4ms^-1. 1)What is their total momentum? 2)If the two mass stick together when they collide, what is their final velocity.
- Electricity problem..... please can you solve this...?
- Explain why it is dangerous to run a generator in a closed room?
- For the Fraunhofer diffraction to occur, the wave front incident on the aperture must be? 1) spherical 2) plane 3) cylindrical 4) elliptical
- When monochromatic light shines perpendicularly on a soap film (n= 1.35) with air on each side, the second smallest nonzero film thickness for which destructive interference of reflected light is observed is 296 nm . What is the wavelength of the light ?
- Find the distance of the image when an object is placed on the principle axis at a distance of 10cm infront of a concave mirror whose radius of curvature is 8m?
- How do to solve this sankey diagram?
- On the earth, 49 degrees of latitude is how many kilometers? how many miles? (Assume that the radius of the earth is 6400 km, or 4000 mi, approximately.)
- Initial horizontal velocity?
- The mass and diameter of a steel ball were used to determine its density the mass was measured within 1% dm3 the diameter within 3% what is the percentage error in the calculated density of the steel?
- I have 5 components: component 1 uses 15mA at 5V component 2 uses 66mA at 3V component 3 uses 20mA at 5V component 4 uses 40mA at 7V component 5 uses 9mA at 5V What is the power consumption?
- A signal is broadcast at a resonant frequency of 1 MHz, if the circuit has a 100 pF capacitor what inductor value do they need to receive this resonant frequency? Give your answer in μH.
- You are watching a meteor shower. You notice that some of the "falling stars" are green, and others are blue. What does this tell you about the meteors that are involved in the storm?
- How much power is used if a force of 35 Newton’s is used to push a box a distance of 10 meters in 5 seconds ?
- An approaching storm is moving at 15 km/hr. What do you need to know to determine its velocity?
- When I create an wave on a string by striking or, plucking, how an another wave of same time period, frequency but of different sign create itself which results to the formation of the stationary wave?
- Find the values of *F* and #theta#?
- A car coasts up a hill. As it climbs, it slows down. Which type of energy is the car losing as it goes up?
- Which law states that when one object exerts a force on a second object, the second object exerts a force on the ﬁrst that is equal in strength and opposite in direction?
- What is the primary:secondary turns ratio of this transformer ?
- The linear momentum of a particle of mass 1kg and kinetic energy 2J?
- The substance as a result of the chain of transformations loses one α_ and two β- particles and becomes U(234,92). Find the initial radioactive element ?
- Give reason ?
- What is the wavelength of radio waves that have a frequency of 530 kHz (5.3 × 10^5 Hz) and a speed through air of 3.00 × 10^8 m/s?
- Magnetic field lines can be entirely confined within the core of a toroid, but not within a straight solenoid. Why?
- The gravitational force exerted on a baseball is #-F_ghatj#. A pitcher throws the ball, initially at rest, with velocity #v hat i# by uniformly accelerating it along a horizontal line for a time interval of #t#. What force does he exert on the ball?
- At a particular instant in the flight the glider is losing 1.00 m of vertical height for every 6.00 m that it goes forward horizontally. At this instant, the horizontal speed of the glider is 12.5 m s–1. Calculate the velocity of the glider?
- What is electricity?
- If we burn a piece of paper using a small flame of match stick, the flame, that is heat and light released from the reaction increases.where do these heat and light energies come from?(energy can be created)
- An iron piece get heated faster than water even though same amount of heat energy is applied in both.why?
- Physics question?
- How does conduction, convection and radiation work to transfer heat from an electric radiator in your bathroom?
- Can anyone prove the formula of volume expansion coefficient and the compressibility for van der Walls gas ?
- A driver is driving around a circular track at a speed of 45 m/h. How is the driver's velocity compared to his acceleration?
- Two waves are having a constant phase difference does it means the two waves can be out of phase 180 with respect to one another ?
- Why is it that in a rainy day a weak wind was able cause a coconut tree to fall ?
- Airplane traveling at 75m/s with a kinetic energy of 843700j?
- If you accidentally drop a 50p coin (0.01kg) from the top of the shard (308m). How fast will it be travelling when it hits the ground?
- What is the height of the platform?
- Kingda ka at six flags has a 55m drop. The rollercoaster has a mass of 8000kg. How fast it be travelling when it reaches the bottom?
- A 2.5-kg book slides horizontally and falls from a shelf 3.0 m above the floor. How much work does the force of gravity do on the book as it falls 3.0 m?
- Bird flying towards its nest with a mass of 0.25kg and a kinetic energy of 40.5j?
- Automatic door closing 0.2m/s,with a kinetic energy of 1.6j?
- Consider the LC circuit. If one needs to tune this circuit to a frequency of 84 kHz, and the capacitor has a capacitance C = 3.0 mF, what inductance L is needed?
- Why do most coloured plastics change colour when bent too much?
- How do you find the density of a fluid?
- The frequency of the first harmonic standing wave in a pipe that is open at both ends is 200 Hz. What is the frequency of the first harmonic in a pipe of the same length that is open at one end and closed at the other?
- What is the amount of energy liberated in joules when 85 g of water cools from 45 C to 25 C.?
- How to convert from N.s/m^2 to N.s/cm^2 ????
- If an elephant were chasing you, its enormous mass would be very threatening. But if you zigzagged, the elephant's mass would be to your advantage. Why?
- 5. If the four-wheeler has a top speed of 25 mph, will Stanley and his friend be able to use this method to determine if the whistle is functioning?
- A refrigerated truck has a dimension of 12m*2m*3m. The cargo space at the refrigerated truck is to be cooled from 25(oC) to 6(oC). The heat lost by transmission is 1kJ/s and the power input of the refrigeration system is 10kW?
- A fish looking up through the water sees the outside world contained in a circular horizon. If the refractive index of water is 4/3 and fish is 12 below the surface , find the radius of the circle in cm?
- A wave along guitar string has a frequency 540 Hz and a wavelength of 2.5 meters. Calculate the speed of the wave?
- Supose that you need 2 Joules to expand a spring from its natural length of 30 cm to 42 cm: A)How much work its required to expand it from 35 to 40 cm? B)How long will expand from its natural length if a force of 30N is aplied to it?
- A diver used 6000 J to dive off a rock cliff. If the diver took 2.5 seconds to reach the water, how much power was used?
- A horizontal force is applied on a body on a rough horizontal surface produces an acceleration#a#. If coefficient of friction between the body and surface which is #u# is reduced to #u /3#, the acceleration increases by 2 units. What is the value of #u#?
- A truck pulls boxes up an incline plane. The truck can exert a maximum force of 4,000N. If the plane's incline is #(5π)/8# and the coefficient of friction is #9/8#, what is the maximum mass that can be pulled up at one time? Thanks
- What is the highest order spectrum which may be seen with monochromatic light of wavelength 600 nm by means of a diffraction grating with 5000 lines/cm ?
- A photon and electron have got same de borglie wavelength prove that the energy of photon is 2mclamda/h of the kinetic energy of electron??
- Help me anyone on physics?
- An airplane accelerates down a runway at 3.20 m/s_2 for 32.8 s until is finally lifts off the ground. Determine the distance traveled before takeoff?
- If you need 6 joules of work to expand a spring from 10 to 12 cm and another 10J to expand it from 12 to 14 cm. Wich is the natural lenght of the spring?
- A ball is dropped from a height of 64 feet. It's height, in feet, can be modeled by the function h(t)=-16t^(2)+64,where t is the time in seconds sonce the ball was dropped. After how many seconds will ball hit the ground?
- A river boat travels from port A to port B, a distance of 15.0 km downstream, in 1 hour 40 minutes. The return journey takes 2 hours 30 minutes. Calculate: (a) the boat speed relative to the water? (b) the speed of the river?
- The vector #vec A# is on a coordinate plane. The plane is then rotated counterclockwise by #phi#. How do I find the components of #vec A# in terms of the components of #vec A# once the plane is rotated?
- A golf ball is hit in the air with an upward velocity of 45ft from the top of a building of 50ft.(t)=16t^2+45+50 Round to the nearest tenth?
- A car experience a displacement of 40km in 20 min. What is the average velocity in m/s?
- (PHYSICS HELP!) Two cars have identical horns, each emitting a frequency of fs = 409 Hz. One of the cars is moving with a speed of......?
- What does the d stand for in the equation s equals d/t ?
- A heater is marked 50 watts will evaporate at 0.05kg of boiling water find the specific latent heat of vaporization of the water?
- In the figure, each resistance is of 10 ohms. The equivalent resistance between P and R is ?
- A 0.45-kg football traveling at a speed of 22 m/s is caught by an 84-kg stationary receiver. If the football comes to rest in the receiver's arms, what is the magnitude of the impulse imparted to the receiver by the ball?
- A paddock on level ground is 2km long and 1km wide. If a farmer walks from one corner to the opposite corner along the fences in 40 minutes, how long will it take him walks across the diagonal?
- Paul drove for one and a half hours at 65 mph before he realized he had forgotten his wallet. How far was he from home?
- Question: A 3kg block is attached to an ideal spring with a force constant k = 200N/m. The block given + + direction of magnitude u = 12 m/s. Find a. The amplitude b. The phase angle c. Write an equation for the position as a function of time?
- What is the linear speed and centripetal acceleration of point X?
- Give some example of scattering of light that we come across in day to day life ?
- A block of charge q and mass m is connected to a spring of constant k. An electric field E exists parallel to the ground. The block is released from rest from a unstreched spring. Find Maximum displacement?
- A rocket accelerates at a rate of #30# #m##/##s^2# for #2# minutes. What is its change in velocity?
- A sound wave with a high amplitude are ?
- Its question about fixed pulley?
- Two airplanes leave an airport at the same time. The first flies #(210 " km")/("hr")# in a direction of #290^@#. The second flies #(180 " km")/("hr")# in a direction of #185^@#. After 3 hr, how far apart are the planes?
- A bicycle moves with a constant velocity of 5 km/hr for 10 mins and then decelerates at the rete of 1 km/h till stops. Find the total distance covered by the bicycle?
- How does increase in mass of a body affect its inertia?explain
- A bulb used in a car is rated 12 V , 48 W . find the energy consumed in one minute when the bulb is connected to 6 V battery?
- If the velocity of the wave is 200 m/s, what is the frequency of the wave?
- A ball is thrown upward from the roof of a 25m building. The ball reaches a height of 45m above the ground after 2s and hits the ground 5s after being thrown. What is the equation for this function?
- What is the force, in terms of Coulomb's constant, between two electrical charges of #12 C# and #-7 C# that are #4 m # apart?
- How to prove #m=m_0/(sqrt(1-(v^2/c^2)))?#
- How can you tell that the magnetic field gets weaker farther from the magnet?
- You have three resisters of 9 ohm each . how can you combine them to get a resistance of 12 ohm?
- The driver of a car traveling at 36 km/hr applies the brakes to decelerate uniformly. The car stops in 10 sec. Plot the speed-time graph for this period. Find the distance travelled by the car during this period by calculating the area under the graph?
- An body with a mass of #6 kg# is on a slope at an incline of #pi/5 #. If the body is being pushed up the slope with a force of # 4 N#, what is the minimum coefficient of friction required for the body to remain at rest?
- Number of molecules per unit area at the surface of water?
- In a Young’s double slit experiment two rays of monochromatic light emerge from the slits and meet at a point on a distant screen.The point on the screen where these two rays meet is the eighth order bright fringe...?
- A train whistle blows every 10 seconds. What is the frequency of the whistle?
- Two 6.6 kg bodies, A and B, collide. The velocities before the collision are A = (32 i + 41 j) m/s and B = (31 i + 3.2 j) m/s. After the collision, velocity of A = (7.9i + 11 j) m/s. ?
- The position vectors of p and q are p=i-3j and q=4i+5j respectively. Find the unit vector parallel to pq .?
- 2 litres of water have have reached the temperature of 103°C, without beginning to boil. However after throwing in a small piece of ice (with insignificant mass), the water began to boil. What is the mass of water that transformed into water vapor?
- Engineering Electromagnetics. How about solution?
- Give 2 examples of retarded motion from daily life?
- A cell is connected in series with a resistor and supplies a current of 4.0 A for a time of 500 s. During this time, 1.5 kJ of energy is dissipated in the cell and 2.5 kJ of energy is dissipated in the resistor. What is the emf of the cell?
- The resistivity of copper is 1.7 X 1O^-8 ohm m. What length of copper wire of diameter 0.1 mm will have a resistance of 34 ohm?
- Object A emits more light than Object B. Would it be fair to say that the more luminescent object (Object A) is emitting <em>more high energy photons<em> than Object B? If so, why? If not, why not?
- A 13.1 eV photon is emitted from a hydrogen atom. What is the Balmer formula n value corresponding to this emission? What is the Balmer formula m value corresponding to this emission?
- A player hits a table tennis ball with a force of 25N. The mass of the ball is 0.027 kg. What is the acceleration of the ball in meters per seconds squared?
- Convert 0.0075km squared to m squared?
- Why are loud sounds dangerous?
- Your family is moving to a new apartment. While lifting a box 1.5 m straight up to put it on a truck you exert an upward force of 200 N for 1.0 s. How much power is required to do this?
- A net force of 10.0 N is exerted by Irene on a 6.7-kg cart for 3.0 seconds. What is its acceleration?
- What is the proof of# E=mc^2#?
- A net force of 10N acts on a mass of 25kg for 5 seconds. What is the acceleration?
- 'How do I find the angle between a vector and the y-axis?'
- What are differences between parallel and series circuit .?
- The modulus of a vector A=5i+PJ+4√2k is 11 the value of p is?
- The radius of curvature of the convex surface of a planoconvex lens is 95,2cm.The lens is placed convex side down on a perfectly flat glass plate that is illuminated from above with red light having a wavelength of 580 nm ...?
- What is light year? express in terms of SI unit.
- It is question about finding distance from velocity time graph?
- Explain why an atom is neutral ?
- How to do this through lami theorem?
- A ball is tossed vertically upwards with a speed of 5.0 m s–1. After how many seconds will the ball return to its initial position?
- How does warmer temperatures affect takeoffs?
- It is about finding kinetic energy want help in part 1 not part 2 in part 1 please tell how to find velocity?
- What is the mass if A force of 350N is applied in the object making it accelerates at the rate of mass per second squared?
- State the coulombs laws of electrostatics?
- A capacitor of 10 micro farad stores a charge of 3.5C is set for discharging through a 100 kilo ohm resister, the charge on the capacitor after 1 second will be?
- If the difference between the frequencies of two tuning forks is n number of beats produced in two seconds are a)n b)2n c) 3n ?
- A mass attached to a spring of spring constant 200N/m undergoes a simple harmonic motion. If the mass is 2kg, what is the period of the oscillation?
- A man of mass 80 kg is standing in a lift, which is accelerating upwards with an acceleration of 0.6 ms-2. The size of the force between the man and the lift floor is ___N?
- Why is graphite a good conductor of electricity but not diamond?
- Can someone pls show me the VR (Voltage-Resistance) Graphs for an NTC thermistor, filament lamp and conductors?
- Help with capacitor question?
- A ball is thrown horizontally from the top of a building. How far will the ball fall in 2.00 seconds?
- What is the kinetic energy of an object with a mass of 10 kilograms traveling at a speed of 10 m/s? Assume no other forces act upon the object.
- Jill is out for a walk. How much gravitational potential energy does she gain when she heads to the top of a hill 20 m tall? Jill is 55 kg.
- Two tourists left two towns simultaneously, the distance between which is 38 km, and met in 4 hours. What was the speed of each of the tourists, if the first one covered 2 km more than the second one before they met?
- What is the wave speed if the wavelength is .5 m and the frequency is 50 Hz?
- A 10kg object is 10m in the air, what is the potential energy?
- Three point charges of +2q, -q and -q are placed at the corners A, B and C of an equilateral triangle ABC of side ‘x’. What is the magnitude of the electric dipole moment of this system?
- A particle starts at a position 2 meters from you and moves past you in 10 seconds to a position 5 meters from you. What is the particle's velocity?
- What is the diffrence between electric field intensity and electric field?
- Please solve q 12?
- Work out? The maximum range of projectile is 3000M.what would be its range when it is launched at an angle of 150 with the horizontal? Thanks
- 1 Joule of energy is to be converted into new system of units in which length is measured in 10 metre, mass in 10kg and time in 1 minute. The numerical value of 1joule in the new system is?
- The wavelength of a specific photon in the infrared spectrum is 4 x 10^6 meters. Given that the speed of light is 2.998 x 10^8 m/s, what would be the frequency of this infrared wave?
- Its question about velocity time graph?
- What is moment of inertia? How to calculate it's value for different bodies? plz explain!!
- The half-life of a radioactive element is 5.0 days. A freshly-prepared sample contains 128 g of this element. After how many days will there be 16 g of this element left behind in the sample?
- What is the weight of a 67.0-kg person who is running with a speed of 10.0 m/s?
- Years ago the barges that traveled along the canals were dragged by horses. Suppose that the horse is exerting a force of 7900 N at an angle of 18 degrees with the direction of movement of the barge, which is sailing in a straight line through the channe?
- Please solve the q 195?
- If a ball is thrown downward from the top of a building with initial velocity of #10 "m"/"s"# and strikes the ground with a speed of #60 "m"/"s"#, how tall is the building?
- For a questions(Comprehension) of Mechanics refer a photo below.?
- What happens to the force of attraction when: 1. Distance is doubled 2. Masses are doubled 3. Distance is reduced by half ?
- Why do different substances have different viscosities?
- A boy runs 800m northwards, followed by 600m westwards. What is the magnitude of his distance and displacement ?
- What is the meaning of SONAR(Sound Navigation and Ranging?
- The angular speed of an automobile engine is increased from 1200 rev/min to 3000 rev/min in 12 s. (a) What is its angular acceleration, assuming it to be uniform? (b) How many revolutions does the engine make during this time?
- Please solve q 69?
- How to solve this physics question?
- Please solve the q202 ?
- How do you differentiate between 1D motion and 2D motion?
- Please solve the q194 ?
- Does mass change when a matter undergoes state change?
- A certain light truck can go around a flat curve having a radius of 150m with a maximum speed of 32.0 m/s. With what maximum speed can it go around a curve having a radius of 75.0m?
- What is the wavelength (in cm) and the period (in seconds)?
- What's the force on charge Q3? Thank you!
- What mass of steam at #100^@ C# must be mixed with #150 g# of ice at its melting point, in a thermally insulated container to produce water of #50^@ C#?
- Compared the redlight, green light has greater?
- The echo of a ship's fog horn, reflected from an iceberg, is heard 8.0 seconds after the horn is sounded. How far away is the iceberg?
- A problem about the motion of planets?
- The athletics track consists of a rectangle and two semi-circles. inside the track there is a VIP SECTION 20M LONG AND 15M WIDE. during a 6 km race evenner ran 8.05 rounds before fainting. how many km (three decimal places) did she run?
- Someone explain?
- If #s=ut+1/2at^2#, #t=#?
- Calculate the acceleration of a body of 250g when acted by a force of 1 newton?
- Heat is transferred from the heating element to the pot to the boiling water. What is the MOST likely method of heat transfer?
- Please solve q 99?
- A 1.0 kW heater supplies energy to a liquid of mass 0.50 kg. The temperature of the liquid changes by 80 K in a time of 200 s. The specific heat capacity of the liquid is 4.0 kJ kg–1K–1. What is the average power lost by the liquid?
- An inductor stores u energy and I current is passed through it and dissipate energy at the rate of P.The time constant of the circuit,when this coil is connected across a battery of zero internal resistance?
- What is the capacitance such that the current through the circuit is a maximum?
- Calculate the speed of a car that travels 150m in 88 seconds ?
- Ice cubes of total mass 6.00 grams have temperature -4.0°C, and are placed in 50.0 grams of water at 20.0°C in an insulated foam cup. the equilibrium temperature of the water inside the cup? READ DETAILS, TOO.
- A particle begins to move with a tangential acceleration of constant magnitude #0.6m/s^2# in a circular path. If it slips when it's total acceleration becomes #1m/s^2#, then the angle through which it has turned before slipping is?
- A swimmer speeds up from 1.1 m/s to 1.3 m/s during the last 20 s of a workout. What is the swimmer's acceleration during this time interval?
- How can a dipole exist? How can the two charges stay stable at a finite distance? Thank you
- Physics Help?
- Two masses, m1 =1.9kg and m2= 1.4kg, are attached by a string passing over a pulley as shown in the diagram below. The angle of inclination is theta= 25 degrees. The system is set in motion, and the masses travel a distance h= 1.3m at a constant speed?
- Si unit of potential energy?
- Please solve q 74?
- The speed of sound is 340m/s the highest note on a piano has a frequency of 4186Hz what is it’s wavelength?
- Please solve q 77?
- helpme please: A spring of 3 fts requires a force of 10 pounds to stretch it to a length of 3.5 fts a) Find the work required to stretch the spring from its natural length to a length of 5 fts?
- A man travels 370 km partly by train and partly by car. If he covers 250 km by train and rest by car, it takes him 4 hours. But if he travels 130 km by train and the rest by car, he takes 18 mins longer. Find the speed of train and that of car?
- How to find momentum when kinetic energy increase or decrease?
- The distances of two planets from the sun are 10^12 m and 10^10 m respectiuely. Then the ratio of time periods of those planets is____?
- Why cann't vectors cannot be added algebraically?
- If a transformer consist of #770# turns in primary coil with #220# primary voltage produces #110# secondary voltage, then calculate the number of turns in secondary coil?
- I am trying to push start a car which has stopped. If the biggest force with which I can push the car is 420N, and the car has a mass of 1025kg, how fast will it be going after 8.0s of pushing?
- Why we use #mu_0# for air when calculating the magnetic flux density inside an electric cable where (r<R) instead of the permeability of the metal core #mu#. #" "# #B=(mu_0Ir)/(2piR^2)#?
- Derived the s1 units of force,pressure and density?
- What causes the pitch to change of a siren to change as it goes by you? How is frequency related to pitch?
- A water balloon with a mass of 500 g is launched across a waterpark and lands 150 m away 5 seconds later. What is the initial velocity in the x and y directions, launch angle, and max height?
- What is conserved when two objects collide in a closed system?
- A wave of frequency 500 hertz travel between two points P and Q with velocity 300 metre per second. How many wavelengths are there in PQ if length of PQ is 600 metre?
- How much secs? (physics)
- According to the Law of Conservation of Energy, a golf ball with 100 Joules of gravitational potential energy at its maximum height will have how many Joules of kinetic energy right before it hits the sand when it is dropped?
- A body is charged to a certain potential.When an additional charge of 60nC is imparted to it ,rise in potential is found to be 15 mV .Find the capacitance of the body?
- Calculate the heat required to change 76g of water at 23c to 100c?
- What is the frequency of this radiation?
- What is the fastest thing on earth?
- Particle travels 10m in 5sec and 10m in 3sec assuming constant acceleration what is the distance travelled in next 2sec? Ans:8.3m
- Help please?
- A ball of mass 0.5 kg is projected vertically upwards if its velocity at 4m high is 3 m\s find the potential energy and kinetic energy given that the acceleration due to gravity =10 m\s^2?
- A force of 20 N gives a ball an acceleration of 4.0 m/s^2 on a level frictionless surface. What is the mass of the ball?
- Why do 2 bodies of different masses fall at the same rate?
- True of false: A person that throws a baseball will be pushed by the baseball?
- What is the force of friction between a block of ice that weighs 930 N and the ground if #mu# is 0.12?
- A particle moves in x-y plane according to rule x = a sin ωt and y = a cosωt. What kind of path does the particle follow ?
- Can anyone give me some information on how nuclear energy is more beneficial than other types (GCSE level please :) ?
- An arrow is shot at 33.0 above the horizontal. Its velocity is 48 m/s, and it hits the target. What is the maximum height the arrow will attain? The target is at the height from which the arrow was shot. How far away is it?
- If you sit on a moving bus and toss a coin straight up into the air, where will it land?
- How to find out the breakdown voltage?
- Can you create electricity with a magnet?
- The frequency of a wave is #5.1*10^14# #Hz#. The speed of a wave in a certain medium is #2.1*10^4# #m##/s#. What is the index of refraction of the medium?
- Which of the fundamental forces is the stronger force?
- Find the simplified expression of the following circuit using K Map?
- What would be the kinetic energy?
- Find the maximum amount of water that can flow through 3 cm i.d.pie per minutes without turbulence .Take the maximum Reynolds nomber for nonturbulent flow to be 2000?.for water at 20 c, viscosity=1*10^-3 pa.s Ans;0.0028 m^3
- A car initially at rest undergoes uniform acceleration for 6.32 seconds and covers a distance 120 meters. What is the approximate acceleration of the car?
- Why are the electric field lines between two unparallel metal plates curved? Can't they be straight?
- Circular Loop Question?
- What is the tension in the rope? And the horizontal and vertical forces exerted by the pivot?
- 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?
- Fuel oil density #820" kg/m"^3# flows through a venturi meter having a throat diameter of 4.0 cm and an entrance diameter of 8.0 cm. The pressure drop between the entrance and the throat is 16 cm of Mercury. The density of mercury is #13600" kg/m"^3#?
- A woman on a bike accelerates from rest at a constant rate for 10 seconds, until the bike is moving at 20m/s. She maintains this speed for 30 seconds, then applies the brakes to decelerate at a constant rate. The bike comes to a stop 5 seconds later.help?
- When we use this laws?
- Is light a particle or wave? Why?
- Water is under 122.5m . When a stone throw sound is heard after 5.36 second .so what is the velocity of sound?
- The force applied against an object moving horizontally on a linear path is described by #F(x)=e^x+ x #. By how much does the object's kinetic energy change as the object moves from # x in [ 1, 3 ]#?
- How does a refractive index of water compare with that of glass?explain
- Please solve it?
- Katie and her best friend Liam play tennis every Saturday morning. When Katie serves the ball to Liam, it travels 9.5 meters south in 2.1 seconds. What is the velocity of the tennis ball?
- Does superposition of waves require the two waves to have the same speed and frequency?
- How do you solve this if mass isn't known??? (Forces question)
- A boy makes a ruler with graduations in cm in it. To what accuracy this ruler can measure? How can this accuracy be increased?
- Gloria is designing an experiment to investigate how different kinds of wheels accelerate down a ramp. Which is the dependent variable?
- In a circuit, the supplied voltage is 1.5 volts, and the resistor value is 3 ohms. What is the current in the circuit?
- Please help ASAP. I don't understand: Consider a light ray traveling from medium 1 to medium 2 with medium 2 extending downward indefinitely. Let the index of refraction of medium 1 be 1.0...?
- 800g.flask of water is heated from 20'C to 85'C, how much heat (in joules) did the water absorb?
- What is the primary pitch instrument when establishing a constant altitude standard-rate turn?
- How long it will take for 500ml of water to flow through a 15cm long 1.5mm radius if the pressure differential across the pipe is 4kpa?the viscosity of water is 0.8 cpoise. Ans=7.5s
- How many excess electrons are on a ball with a charge of -5.00 X 10 negative 17 C?
- A cube of wood floating in water supports a 200-g mass resting on the center of its top face.when the mass removed the cube rises 2-cm.determine the volume of the cube? Ans: 1000 cm^3
- One example of acceleration?
- As above, a particle has velocity v(t)= #3t^2-2t-1# measured in m/s. Compute total distance traveled over [0,2] in meters?
- What is the coefficient of friction?
- A tank containing oil of (sp gr=0.8) rests on a scale and weighs 78.6 N .By mean of a wire,a 6.0 cm cube of aluminum, (sp gr=2.7) is submerged in the oil? . Find a) the tension in the wire b)the scale reading none of the oil overflows Ans; (a) 4N (b)80N
- Convert 10 metric tons to grams? 3 days to sec 100km to mm 20 miles to m 200lbs to kg
- Please help me figure out question 1?
- A dog has a momentum of 60 kilogram meters per second west. The dog has a velocity of 3 meters per second west. What is the mass of the dog?
- Variable acceleration?
- A ball is thrown with an initial speed at an angle with the horizontal the horizontal range of the ball is R and the ball reaches a maximum height R/6. In terms of R and g find the time interval during which the ball is in motion?
- In a blood transfusion,blood flow from a battle at atmospheric pressure into a patient vein in which the pressure is 20mmHg higher than atmospheric.The bottle is 95cm higher than the vein and the needle into the vein has length of 3cm and diameter 0.45mm?
- Find the magnetic field at the point O center of the circle with R=20 cm if the current is I=100A ?
- If an object weighs 500N and you lift it 2m how much work have you done on it?
- Help me with this question?
- Could you please solve question c i) and c ii) ?
- A worker does work of 360 J against a friction force of 20 N in pushing a body with a uniform velocity for 4.5 s find the value of velocity?
- How is light formed?
- Your body applies force to the ground as weight. If you weigh 450 newtons and carry a backpack that weighs 45 newtons, what is the net force applied downward to the ground?
- The half-life of a certain radioactive isotope is 6 hours. If we start out with 100 grams of the isotope, how many grams will be left after 1 day?
- While on planet Soccerball, an object is thrown vertically upward with an initial velocity of 5.0 m/s. If this object returns to the point of release in 3.0 s, what is the acceleration of a free falling object on this planet?
- A 100-Hz sound wave has a wavelength of 4 meters. What is the speed ?
- An electron of kinetic energy 0.45 KeV moves in a circular orbit perpendicular to a magnetic field of 0.325 T. Find (a) the radius of the orbit and (b) the frequency and period of the motion ?
- If 10^9 electrons move out of a body to the another body every second, how much time is required to get a total charge of 1 C on the other body?
- A lamp is plugged into a standard 120-volt outlet. If the lamp draws a current of 0.5-amps, how much energy is consumed in 1 minute?
- A wire 0.4 m long and carrying an electric current of 2.5 A is located in a uniform magnetic field in which B=0.01 T. Calculate the force on the wire when it makes an angle of 60 degrees with the field direction ?
- The volume of a fixed mass of gas at 760 mmHg is 1500 cm^3. what is the pressure if the volume is reduced to 1000 cm^3 at constant temperature?
- (a) Find the velocity of Q relative to P. (b) Find the value of λ if P and Q collide. (c) If λ = −1/2, find the shortest distance between P and Q.?
- A particle moves along the x-axis according to the #x = A(1+sinomegat)#. What distance does it travel between t = 0 and #t = (2.5pi)/omega#?
- A roller coaster car rapidly picks up speed as it rolls down a slope. As it starts down the slope, its speed is 4 m/s. But 3 seconds later, at the bottom of the slope, its speed is 22 m/s. What is the car's acceleration?
- An unstretched spring has a length of 10 centimeters. When the spring is stretched by a force of 16 newtons, its length is increased to 18 centimeters. What is the spring constant of this spring?
- A -0.06 C charge that is pointing downward is placed in a uniform electric field with a strength of 200 N/C. What is the magnitude and direction of the force on the charge?
- Calculate the magnitude of the magnetic field at a point 100cm from a long thin conductor carrying a current of 1A ?
- A metal sphere has a charge of –6 mC. When 5 × 1012 electrons are removed from the sphere, what would be net charge on it?
- Light is refracted through a diamond. If the angle of incidence is 38 ◦, and the angle of refraction is 16 ◦, what is the index of refraction?
- Can someone help me with this question as fast as possible plz ?
- What is the gravitational force of attraction between two bodies of masses 1500kg and 8500kg which are 2.6km apart?
- How is solid angle related to electric field according to Gauss's Law?
- Variable acceleration?
- A 95 kg student slides down a waterslide that is 13 m high. How fast is he going at the bottom?
- What quantities determine the torque on an object?
- Variable acceleration?
- Find the net resistance in the second diagram (right in the centre of the image) with explanation?
- Please solve q 51?
- Please solve q 61?
- Please solve q 49?
- A stick figure is pushing three boxes across the screen. The mass of the blue box is 74kg, the mass of the red box is 86kg and the mass of the yellow box is 16kg. How hard does the stick figure have to push to get the boxes moving, if μs is 0.92?
- A battery can create a #8 V# emf across its terminals. If this battery powers a circuit that requires #1.7# amps for #4# minutes, how much chemical energy is lost by the battery during this time?
- A man standing in the roof of a building which is 100 meters high throws a ball vertically downward with an initial velocity of 20 m/s.The acceleration due to gravity is 9.8m/s/s.What is the velocity of the ball aftre it has been falling for 1.5s?
- Write an expression for the work done by the spring? (Physics)
- 2 identical pendulums A&B are suspended from same point.The bobs A&B are given positive charges q1 and q2 (q1<q2). If A&B are making angles $1 and $2 with the vertical and T1 and T2 are tensions in the string respectively.Then prove that $1=$2 and T1=T2?
- Which results in a larger attractive force on a single electron:+3C of charge1.0 m away,or +6c of charge 2 m away?Numerically justify your response?
- If a weight scale shows that you weigh 200 kg on the surface of the Earth, and then you skydive with both of you feet attached to the scale, what will you read a weight of?
- If a 5.00x10^2W heater has a current of 4.00A, what if the potential difference across the ends of the heating element?
- A beaker contains oil of density 0.8 g/cm^3. By means of a thread, a 1.6 cm cube of aluminum(p=2.7g/cm^3) is submerged in the pil. Find the tension in the thread?
- What are the new values of V, Q, U, and E?
- A particle of mass m strikes a wall at an angle of incidence 60° with velocity V elastically. Then the change in momentum is?
- A block of mass 2 kg is released from the top of a rough incline of height 2 m if the velocity of the block on reaching the bottom of the incline is 4 m/s find the magnitude of the work done in joules by the frictional force on block? G=9.8m/s2
- How much heat energy is produced by 0.5 Wh of electrical energy?
- What is speed at X = 6? ( Physics) Help
- What is the speed of the airplane as a function of time?( Physics )
- If the threshold frequency in the photoelectric effect decreases when the emitting metal is changed to a different metal, what can you say about the work functions of the two metals?
- Determine the temp. of 0.02 moles of a gas that occupies a volume of 100cm3 & at a pressure of 5x10^5Pa?
- A parallel-plate capacitor has a capacitance of 1.35 pF. If a 12.0 V battery is connected to this capacitor, how much electrical potential energy would it store?
- Can someone explain to me the difference between potential and potential energy in details?And,work done in a conservative force field is the difference in potential or potential energy?
- A point P moves around a circle of r = 1ft at 20rpm (rotations per minute). Find the linear velocity (to the nearest feet per minute)?
- Please help me figure out question 15 and explain it so i can understand it? look at the picture below for the question and information. thank you.
- How much more intense is a 90 db hair dryer than 60 db street traffic?
- If you exert a force on an object, the force which the object exerts on you will?
- A 3kg stone is dropped from a height of 4m. What is its momentum as it strikes the ground?
- A 3kg stone is dropped from a height of 4m. What is its momentum as it strikes the ground? Solve using suvat
- Earthing is done only in the outer part of the electric appliances. What is the reason?
- What amount of heat is required to raise the temperature of #30 kg# water when it is heated from #20^@ C# to #37^@ C# ?
- A brick of mass 2 kg falls through water with an acceleration of 2 ms-2. The total force of the resistance is ___N ?
- What fraction of the volume of an ice berg is visible above ocean water ? (density of ice =917) (density of water =1025)
- Suppose that a hole were drilled to the center of the Earth and an evacuated pipe were inserted in the hole. Assume the radius of the Earth is R and the density is uniform with the total mass M. An object of mass m is dropped down the pipe?
- A microscope using photon to locate an electron in an atom to within a distance of 0.2A,what is the uncertainty in the moment of the electron measured in this way?
- A railway track running N-S has 2 parallel rails 1m apart. If the horizontal component of magnetic field at that place is 0.3*10^-4 and angle of dip is 60°, then what'll be the value of induced emf b/w the rails when a train passes at a speed of 90km/ h?
- 2/7i^+aj^+6/7k^ is a unit vector when a is ______________ ?
- What is the use of convex mirrors other than rear view mirrors?
- What will be the formula used to find work done against resistance if loss in potential energy and gain in kinetic energy is given?
- Spongebob wears a red tie, how does it interact with light?
- How to plot the points for half life graph ?
- What is the minimum acceleration of the car for this to happen? (Assume no air resistance)
- A stuntman jumps from the roof of a building to the safety net below. How far has the stuntman fallen after 2 seconds?
- How to solve this question?
- What is the role of physics in our daily life routine?
- 28 A girl is long-sighted. Which statement is correct? A She sees close objects less clearly than a person with normal vision. B She sees distant objects more clearly than a person with normal vision.
- An object moves in uniform circular motion at 15 m/sec and takes 1 sec to go two revolutions. What is the radius of this circle?
- How would u calculate the initial velocity in the z direction for a projectile because i know for x it equals u*sin(theta) and y it equals u*cos(theta) so how do u calculate it for z?
- A force of 300N is applied at the end of spanner, whose effective length is 15cm. Then find the torque applied?
- How does this affect the way that the earth absorbs energy from the sun? What is meant by albedo? How would this affect the energy absorbed by the earth?
- Write any three properties of heating coil used in a room heater ?
- What is meant by compton shift?
- The distance between two successive crests of a certain transverse wave is 1.15 m. 20 crests pass a given point along the direction of travel every 16.2 s. What is the wave speed? Answer in units of m/s.
- What is the current through each resistor?
- A horizontal force is applied to the textbook. Find the force of friction the desk exerts on the textbook, if the applied force is: 0N, 12.9N[S], 39[W], 45[E]?
- Assuming that the ball does not hit the floor within the first second of motion, which of these graphs represents the speed of the ball plotted against time?
- A ball is dropped from a height of 784 ft. It's height h, in feet, after t seconds is given by h(t)=784-16t^2. After how long will the ball reach the ground?
- How would you describe the difference between a compressional wave with a large amplitude and one with a small amplitude?
- A person weighs 540N on Earth. What is the persons mass? What would they weigh on Earth?
- A cherry falls from a tree branch that is 9 feet above the ground, how far above the ground is the cherry after 0.2 seconds?
- Help with physics momentum problems I have a test tomorrow, please?
- A 12.4kg mass is being pushed, from rest, along a level surface. The coefficient of kinetic friction between the mass and the surface is 0.35. The mass is being pushed with a force of 74N [North]. The force is being exerted for 6.4 s. ?
- What is the average force on the puck by the stick?
- A constant force of 12 N acts for 5 s on a 5 kg object. What is the change in object's velocity?
- Vector A +vector B =vector B + vector A.Then what is the angle between them?
- A 1500kg ferryboat has a momentum of 25000kg.m/s. What is the speed of the ferryboat?
- Light of frequency 5×10^4 is travelling in a medium of refractive index 1.5. What is the wavelength?
- What is your apparent weight?
- Please solve q 12?
- Please solve q 25?
- Please solve q 10?
- Please solve q 28?
- Find the time needed to exert a 620kg m/s of 6N?
- The momentum of a 350 000 truck is 94 050kgm/s.Find its velocity?
- PROBLEM 10 A point describes a circumference according to law s (t) = t³ + 2t² where s measured meters along the circumference and, in seconds. If a total acceleration of the point is 16 2 m / s2, when t = 2 s.calculate the radius R of the circumference?
- What are the limitation of first law of thermodynamics?
- Please 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?
- It is question about finding tension and force in the picture below ?
- How much work is required? A motor of what power is required?
- Total resistance of the circuit ?
- Collision and rotation problems?
- Particles *P* and *Q* move on a line of greatest slope of a smooth inclined plane. *P* is released from rest at a point *O* on the line and 2s later passes through the point *A* with speed #3.5ms^-1#. (i) Find the acceleration of *P* and the angle?
- How much electron emitted per second from 60W bulb.?
- What affects how fast a sound reaches your ears?
- On a two-lane highway, a car is 15m behind a truck (distance between midpoints), both traveling at 80 km/h. The car has a maximum acceleration of 3m/s^2. The driver of the car wants to pass the truck and be back in the right line 15m ahead of the truck?
- Light travel through space at a constant speed of about 3×10^5km/s earth is about 1.5×10^8km from the sun how long does it take for light from the sun to reach earth?
- A skate glides down a track of 36m. It takes 13 seconds to cross the finish llne. What is the skate's speed?
- |AxB|2+|A.B|2=|A|2 |B|2 ?
- When a 120 V potential difference is applied across a 30 Ω resistance of electric device. What is the current through the electric device? What is the power of the electric device?
- The flow of thermal enery is called...?
- How do you convert from joules to electron volts?
- What was the focal length of the lens when the radius of curvature was .70m and the index of refraction was 1.8?
- A car of mass 1130 kg moves with velocity 17.6 m\s then it collided with a tree and moved with uniform acceleration until it stopped through a distance of 0.77 m ,calculate the force affecting the car?
- What are the highest frequency and lowest frequency parts of the EM spectrum?
- If potential (in volts) in a region is expressed as #V(x,y , z) = 6xy - y + 2yz,# the electric field (in N/C) at the point #(1, 1, 0)# is ?
- A shell of mass 5 kg is fired at 60 degree to the horizontal with a speed of 20 m/sec. Neglecting the air resistance, the K.E of Shell in joule is at highest point is?
- A body projected upward with a velocity 100m/s from ground.At a same time another body is released from height of 300m. When and where do they meet?
- If the temperature of 20.5 g of ethanol increases from 21 °C to 74 °C, how much heat has been absorbed by the ethanol? The specific heat of ethanol is 2.44 J/g °C.
- Find the Coulomb force between two electric charges of #4 xx 10^(-6)# #C# and #5 xx 10^(-6)# #C#, if the distance between the two charges is #2# #cm#?
- At time t =0, the current to the dc motor is reversed, resulting in an angular displacement of the motor shaft given by θ = (198 rad/s)t – (24 rad/s 2 )t 2 – (2 rad/s 3 )t 3 (15 marks) a. At what time is the angular velocity of the motor shaft zero? b. Ca
- A transformer has 100 turns in the primary coil and 25 turns in the secondary coil. When a 120 V potential difference is applied to the primary coil, what is the potential difference in the secondary coil?
- What is the frequency of blue light that has a wavelength of 463 nm?
- 10 ocean water waves whose crests are 12 meters apart reach or hit the shore each minute. What is the wavelength, wave frequency, and wave speed?
- The rate at which electric charge flow through?
- How do machines make work easier if they do not decrease the amount of work you need to do?
- Poynting vector problems?
- Solve it please. "?"
- A man fire a bullet standing between 2 cliffs.1st echo is heard after 3 seconds and second echo is heard after 5 seconds.If velocity of sound is 330m/s, then what is the distance between 2 cliffs?
- What is the wavelength of the wave?
- What would happen to the earth if both the sun and the moon were to disappear instantly?
- While rowing across the lake during a race, John does 3,960 J of work on the oars in 60.0 s. What is his power output in watts?
- Please solve q 117?
- What is its final velocity if its original velocity is -2.9 m/s ? What is the average force exerted on the particle for the time interval between 0 and 5.00 s.
- What is the horizontal coordinate of the center of mass of this track?
- The time period of a pendulum is 2.4 seconds its length is ?
- Here are certain positions of a particle which can move in a horizontal plane. Two of them denote identical positions. Identify these positions: (a) 5m, 30° north of east (b) 5m, 30° east of north (c) 5m, 60° south of west (d) 5m, 60° east of north?
- What is the speed of sound in air?
- State snells law?
- A pump is to raise 100 litre of water a height of 1.2 m in 10s. Calculate the power required assuming 1 litre of water has a mass of 1 kg. ?
- How is constant motion illustrated on a position-time graph?
- What is the velocity of a 500kg elevator that has 4000 joules of energy?
- What is the frequency of this sound?
- What is its wavelength in sea water?
- What is this wave’s frequency?
- What is the wavelength of this sound in the air?
- A rocket with a mass of 1,000 kilograms is moving at a speed of 20 meters per second. What is the magnitude of the momentum?
- Two objects have equal mass and are 1 meter away from each other. How much mass must each mass have to exert an interactive force of 1 N?
- Suppose that a sled is accelerating at a rate of 2 m/s2. If the net force is tripled and the mass is divided by 2, then what is the new acceleration of the sled?
- What is the acceleration of mass #m#?[take g=10#m/s^2#]
- How far does light travel in the following time spans: 4.0 days and 8.0 yr?
- Relativity problems?
- A 60 W kitchen light is left on for an entire year. If the cost of electricity is $0.08 per kWxh, what did it cost to leave on the light bulb ?
- A cyclist of mass 80kg is travelling with speed #18ms^(-1)#. The cyclist stops peddling and comes to rest, without braking, due to resistance forces totalling 120N. (see ? below)
- Physics help?
- Physics Help?
- A barometer tube reads 76 cm of mercury, It the tube is gradually inclined at an angle of 60° with vertical, keeping the open end immersed in the mercury reservoir, what is the length of the mercury column?
- A weather report says winds blow at 5 km/h from the northeast. Is this description of the wind a speed or velocity?
- If the frequency of a wave is kept constant and the wavelength increases does the wave speed increase or remain constant?
- Find the unit vector along 2i + 2j+ 2k?
- Why does a rolling coin keep rolling and not topple until it has nearly stopped rolling?
- What is the frequency of an x-ray with a wave length of 1nm?
- Radar signals are electromagenetic radiation in the microwave region of the spectrum. Typical radar has a wavelength of 3.19 cm. What is the frequency in hertz ?
- Four holes of radius R are cut from a thin square plate of the side 4R and mass M in XY plane as shown. Then moment of inertia of the remaining portion about z-axis is=? Plz explain clearly!!
- The crane lifts a 100kg block of sugar through a vertical height of 16m in 20s. If the power supplied to the motor driving the crane is 1kw, what is the efficiency of the motor?
- If the frequency of a wave is kept constant and the amplitude increases will the wavelength increase or remain constant?
- Can someone help me with this question pleas ?
- Please solve q 76?
- A motor lied on a 2 meters light board.One person lift on one end with the force of 700N and other lift other end with 500N.what is the weight of motor,where centre of gravity located along the board?
- Physics Angular accelerations?
- If displacement #S# of an article is given by #S=at^2-bt^3#, then when is it moving at uniform velocity?
- Estimate the total number molecules in the atmosphere of the earth, take the radius of the earth to be 8000 km ?
- A driver of a car traveling at #15.0# #m##/##s# applies the brakes, causing a uniform acceleration of #-2.0##m##/##s^2#. How long does it take the car to accelerate to a final speed of #10.0# #m##/##s#? How far has the car moved during the braking period?
- At time t=0,the current to the DC motor is reversed resulting in angular displacement of the motor shaft given by (angle =(198rad/s))t-(24rad/s^2)t^2-(2rad/s^3/)t^3 a) at what time is the angular velocity of the motor shaft zero?
- Physics speed vs time graph?
- What is the voltage produced in the following circuit? please show the calculations so i can understand it better and learn how to do it properly.
- A particle moves along the x axis. The velocity of the particle at t is 6t-t^2 . what is the distance travelled by the object between t=0 and t=3?
- A current of 0.5 A flows in a 60-W light bulb when the voltage difference between the ends of the filament is 120 V. What is the resistance of the filament?
- How many focal points and focal lengths do converging and diverging lenses have?
- Inertia and kinetic energy?
- What causes the emission of radiant energy that produces characteristic spectral lines?
- Can someone help me figure out questions 6 and 7? im learning physics.
- Find the speed of the cylinder as it falls through a distance h?
- The vector P makes 120° with x_axis and vector Q makes 30°with Y_axis .what is their resultant ??
- How do i find the minimum initial speed in here?
- Please solve q 14?
- A car of mass 1000kg at an average speed of 16m/s.where does the energy of the car come from?and what is the kinetic energy of the car?
- Find the net resistance of this circuit?
- Find the velocity in meters per second of a baseball thrown 38m in 1.7s?
- An aeroplan is moving horizontaly with a velocity of 600km per hour at a height of 1960m . when it is vertically above a point "A" on the ground, a bomb is released from it. The bomb strikes the ground at a point 'B'. The distance AB is?
- If a rock has a speed of 12 m/s as it hits the ground, from what height did it fall, assuming its initial speed was zero?
- A vehicle of mass m is moving on a rough horizontal road with momentum p. If the coefficient of friction between the tyres and the road be u, then the stopping distance is given by..??
- I saw that dimensional formula of "distance covered in #n^(th)" "# second is #[LT^-1]#". How is that possible when unit of distance is #[L]?#
- The minimum acceleration attained on the interval #0<=t<=4# by the particle whose velocity is given by #v(t)=t^3-4t^2-3t+2# is?
- A record turntable is rotating at 33 rev/min. A watermelon seed is on the turntable 1.7 cm from the axis of rotation. (a) Calculate the acceleration of the seed, assuming that it does not slip. Rest below but can anyone please help me?
- If A.B =AB then the angle between A and B is ?
- A ball with a momentum of 4.0 kg ⋅ m/s hits a wall and bounces straight back without losing any kinetic energy. What is the impulse applied on the wall?
- What is the potential energy of a 3kg ball that is on the ground?
- A rock is thrown into the air. The height (in feet) of the rock after t seconds is given by #h(t)=-16t^2+64t#. A. What is the height reached by the ball after 1 second? B. Determine the maximum height the rock attains
- Why is linear velocity maximum at the equator?
- State law of radioactive disintegration.derive relation betweenhalf life and decay constant ?
- A weight lifter lifts an 800 N bar a distance of 3 m is just 3.5 seconds. What is the power output of the lifter in watts?
- Photoelectric work function for cesium at 2.14eV?
- A pipe is running full of water. At a certain point A it tapers from 0.6m diameter to 0.2m at B. the pressure difference between A and B is 1m of water column. What is the rate of flow of water through the pipe?
- Please solve q 13?
- The resultant of two vectors of magnitude 2 and 3 is 1the angle between them is?
- Please solve this question?
- Please solve q 9?
- Does eye color affects how you see light?
- What is the unit for measuring force in the SI system Of measurement?
- Please solve this question?
- An unstretched spring has a length of 0.10 meters. When the spring is stretched by a force of 16 newtons, its length is increased to 0.18 meters. What is the spring constant of this spring?
- A hat that weighs 5 newtons is hanging from a hook 1.5 meters above the floor. how much gravitational potential energy does the hat have?
- A lizard accelerates from 2.5 m/s to 10.8 m/s in 4 seconds what is the lizards average acceleration?
- If|A|=|B| what is the angle between A+B and A-B?
- You need to move a 53-kg armoire across the room. You put some cardboard under the feet of the armoire. If you push with a force of 38 N, and the armoire accelerates at 0.20 m/s, what is the coefficient of friction of the cardboard over the carpet?
- A, B, C or D?
- How is current affected if the time interval over which the change passes through a given area decreases while the amount of charge remains the same?
- A car is travelling at a steady speed of 76 m/s amd it’s velocity changes to 98 m/s over 5 seconds what’s its acceleration ?
- Two charges each of magnitude Q are fixed at 2a distance apart. A third charge (-q of mass 'm') is placed at the mid point of the two charges; now -q charge is slightly displaced perpendicular to the line joining the charges then find its time period ?
- Please solve q 206?
- A hot cup of local tea prepared for a nursing mother cools from 96 degrees Celsius to 60 degree Celsius after 240 seconds, find the time it will take for the tea to cool to a drinkable temperature of 45 degrees Celsius?
- List two common uses of static electricity and explain how they work?
- The potential energy of an apple is 6.00 joules. The apple is 3.00 meters high. What is the mass of the apple?
- Explain how microwaves are used to find the distance to an aeroplane ?
- The period of a body under Simple Hormonic Motion is represented by T = P^a D^b S^c. Where P is pressure, D is density, and S is surface tension. Then the value of a, b, c...???
- A body moves in a straight line under the retardation #a# which is given by #a=-bv^2#, (#b# is a positive constant and #v# represents the velocity). If the initial velocity is #2m/s#, what is the distance covered in time #t#=2 seconds?
- A body is dropped from a height h under acceleration due to gravity g. if t1 and t2 are the time intervals for its fall for the first one third distance and the rest 2/3 distance, then the relation between t1 and t2 is..??
- The characteristics of simple harmonic motion ???
- Imagine an object that can float it's on a table,take a beaker filled with water.Bring it onto the object and make it upside down,keep it on the object(most of the water should remain in),object floats i.e gets kinetic energy, from where has energy come?
- Explain how frequency of elctomagnetic waves in free space differs with increasing wavelength ?
- A cheetah can accelerate at up to #6.0# #m##/s^2#. How long does it take for a cheetah to speed up from #10.5# #m##/s# to #12.2# #m##/s#?
- A man grows into a giant such that his linear dimensions increase by a factor of 9. Assuming that his density remains same, the stress in the leg will change by a factor of ?
- Physics help?
- 340m/s divided by 880hz?
- Is it possible to have en electromagnetic wave with a wavelength of #99.7# nm and an energy of #1.99*10^-18# J?
- How does transformers work?
- Why ice is slippery?
- An amusement park ride spins you around in a circle of radius 7.2 m with a speed of 21.3 m/s. If your mass is 80 kg, what is the centripetal force acting on you?
- A wave travelling at 1000m/s has a wavelength of 0.4m.calculate its frequency?
- If Earth has a mass of 5.972 × 10^24 kg and Mars has a mass of 6.39 × 10^23 kg, and the distance between them is 225 x 10^6 m, with what force does Earth pull on Mars?
- Which type of force tension is?!
- A particle is projected vertically upwards from a point O with initial speed 12.5 m s−1. At the same instant another particle is released from rest at a point 10 m vertically above O. Find the height above O at which the particles meet.?
- See the image below for the question I attempted it but got a little jumbled up in my head and I want to make sure I got it right can anyone walk me through it step by step and show answer so I can compare?
- The relationship between waves and matter ?
- A Man throws a ball towards a wall which is 74m away. After the ball hitting the wall he runs towards the wall and hears sound after 0.2s.The temperature was #30^@C#.what was the velocity of man?
- The rate of rotation of a solid disk with a radius of #2 m# and mass of #5 kg# constantly changes from #12 Hz# to #16 Hz#. If the change in rotational frequency occurs over #12 s#, what torque was applied to the disk?
- A car starts frm rest and accelerates uniformly at 2 m s square fr 10sec what is the velocity at the end of 10 sec ?
- A blue rubber ball rolls along a smooth level surface at 15m/s due east. Headed due west is a red rubber ball of same mass as the blue one but moving at 22m/s. Immediately after this head-on collision, the blue ball is headed west at 21m/s. Qs below...?
- What is electric potential across a resistor if a resistance of #20# #ohms# draws a current of #6# #amperes#?
- A sports car accelerates from 0 to 60 mph, 27 m/s, in 6.3 seconds. The car exerts a force of 4106 N. What is the mass of the car?
- A wire of registance 'R' is made thrice on itself. The new registance is what ?
- The gravitational force on Jupiter is approximately 2.3 times the gravitational force on Earth. If an object has a mass of 70 kg and a weight of 686 N on Earth, what would the object's mass and weight on Jupiter be?
- During a race, a runner runs at a speed of 6 m/s, 2 seconds later, she is running at a speed of 10 m/s. What is the runner's acceleration? Show your work
- For ordinary terrestrial experiments, the observer is an inertial frame in which of the following cases?
- Under isobaric conditions (2.0x10^5Pa) a gas expands & does 500j of work. what is the change in its volume?
- Suppose an automobile was accelerating at 2 mi/h every 5 s and could keep accelerating for 2 min at that rate. How fast would it be going at #t = 12 min#? How far would it be from the starting line?
- I really bad at physics can someone help me with this question ?
- Please solve q 205?
- Why does lead stop gamma rays?
- A bicycle possesses 1000 units of momentum. What would be the bicycle's momentum if its velocity is doubled?
- Current Electricity MCQ below?
- Would you agree with this? "Objects with mass has a property called inertia, Inertia means that objects has a tendency to resist all changes in motion that effects the object ",
- A projectile is fired with initial velocity 100ms^-1 at an angle of 30 degree with the horizontal. Calculate the time of flight ✈?
- Please solve q 204?
- Four points charges -Q,-q,2qAND 2Q are placed ,one at each corner of the square .The relation between Q and q FOR WHICH THE POTENTIAL AT THE CENTRE OF THE SQUARE IS ZERO IS??
- Mean kinetic energy of one gram of helium at 27 degree Celsius will be??
- Does the speed of a moving object change when there is a change in its direction of motion?
- Sound waves transmit 2000 J of energy through area of 10m2 in 5 sec, the intensity of sound in watt/m2 is?
- A boat's crew rowed 20 kilometers downstream, with the current, in 22 hours. The return trip upstream, against the current, covered the same distance but took 55 hours. Find the crew's rowing rate in still water and the rate of the current?
- I drop a 60 g golfball from 2 m high. It rebounds to 1.5 m. How much energy is lost? c
- A 45kg boy is holding a 12kg pumpkin while standing on ice skates on a smooth frozen pond. The boy tosses the pumpkin with a horizontal speed of 2.8m/s to a 37kg girl (also wearing ice skates) catches it. What are the final speeds of the boy and girl?
- An AC generator made of coil with area 1.0 square meters rotates in a 0.10 T magnetic field at a frequency of 50 Hz. Solve for the number of turns needed to generate a peak power voltage of 250 V ?
- How do I solve this problem? What is the average acceleration of a car that accelerates from 10. m/s forward to 20. m/s forward in 5.0 s?
- Six waves occupied a distance of 60 cm. If the period of each wave is 0.50 s, what is the wavelength?
- You kick a soccer ball at a initial speed of 28 m/s at a 79 degrees angle above the ground. Calculate the horizontal distance when the ball touches the ground?
- At which point in its ride does a roller- coaster have the greatest amount of kinetic energy?
- How do windmills make electricity?
- Please explain the meaning of q 165 with answers?
- Please solve q 180?
- A bicycle with tires 68cm in diameter travels 9.2km. How many revolutions do the wheels make?
- What is the force, in terms of Coulomb's constant, between two electrical charges of #24 C# and #9 C# that are #2 m # apart?
- How do you define sound intensity?
- What are three conditions required by the sun to produce enormous energy?
- Please solve question 147?
- A girl performs 300 J of work lifting a weight to a height of 2 m. How much force does she apply?
- Please solve question 149?
- A rock is dropped from a height 'h'.Simultaneously,another rock is thrown up from the ground which creates a height'4h'.What would be the time taken to two rocks to cross each other?
- Please solve question 153?
- Please solve question 154?
- A stone is dropped from the top of the building and at the same time a 2nd stone is thrown vertically upward from the bottom of the building with the speed of 20m/s.They pass each other 3s later.What is the height of the building?
- What does it mean to say that "the electric current from a wall socket is 120 V AC"?
- If 1 inch is 2.54cm. How many squared inches are there in 7.55 squared meters?
- How much energy is needed to pop a kernel of popcorn?
- Find magnitude and direction of the resultant force?
- What is the rotational kinetic energyof a point body moving in a circle?
- A machine moves a 600 N object 6 meters. If the amount of work put into the machine is 4500 J, what is the efficiency of the machine?
- Light speed in a medium is measured as 2×108 m/s. What if the index of refraction for the medium? What is the apparent depth of a fish with real depth of 9 meters in the medium?
- How much work was done if the power developed during Esuke’s descent was 501.3 W?
- The following figure shows a circuit that contains two batteries and two resistors. Use Kirchhoff’s Loop Rule to determine the current in the circuit ?
- How long will it take a 3 kW electric heater with an 80 % efficiency to heat a 25 kg copper pot containing 120 kg of water from 5 °C to 65 °C? How much will it cost if the cost of electricity is 6.3 ¢/kWh?
- A wheel with a 15cm diameter is rotating at a rate of 7 radians/sec. what is the linear speed of a point on its rim, in meters per minute?
- How do I solve this problem? How much work does an elevator do in lifting a 600. N person 40. m?
- Which has more momentum: a 20,000 kg cement truck traveling at 5 m/s or a 1000 kg. race car traveling at 90 m/s?
- A heat engine has a high-temperature reservoir at 330K and a low-temperature reservoir at 260K. What is the maximum efficiency of this engine?
- What is isothermal process?
- What is the internal energy for an isothermal process?
- If e=3 sin 3πt + 4 cos 3πt. what will be the rms value, peak value and phase of given emf?
- A 3.0g bullet moving at 2.0km/s strikes an 8.0kg wooden block at rest on a frictionless table. The bullet lodges in the wooden block. How fast does the block move across the table after being struck?
- The motion of a body falling from rest in a medium is given by the equation #d/dt(v)#=1-2#v#. What is the velocity at any time?Express in terms of time only.
- If 360 ocean water waves, each 20 meters long, hit the shore every hour, what is the wave speed? What is the wave period?
- Please solve question 155?
- Verify the principle of conservation of linear momentum using newton's second law of motion only?
- The footfall player has a mass equal to 100kg standing on earth surface at distance of 6.38×10^6m.calculate force of gravitational attraction between the earth and football player?
- A stone of mass 1.0kg is dropped from a certain height and takes 8 seconds for the stone to strike the sandy ground, upon reaching the ground the stone penetrate 5.0 into the ground ( take g=10m/s) A)calculate de height from where the stone is dropped?
- Which principle does hydraulic obey?
- What net force is required to give a 25 kg suitcase an acceleration of 2.2 m/#s^2# to the right?
- 'If a cricket ball of mass 150gm is moving with velocity 200m/s in air,a player catches the ball after 0.1 sec, then find the force exerted by the ball on his hand'???
- If the half life of a radioactive substance is 4 days. Calculate the time required to decrease the concentration of 1/8th of original??
- The distance between the bulb and the point vertical below it is 2m, if the distanc is increased by 1m, then illuminance is decreased by??
- State Stefan's law of radiation.?.
- Why is the light affected by gravity if photons are massless ?
- What are the difference between distance and displacement?
- A 12,500 kg railroad car is rolling along a level track with a speed of 4.5m/s when it collides with a second stationary railroad car with a mass of 24,700 kg. The two cars lock together after the collision. Help? Questions in details
- Where does the Earth's magnetic field come from?
- Why does Jupiter have a larger value of #g# than Earth?
- A 45kg boy is holding a 12kg pumpkin while standing on ice skates on a smooth frozen pond. The boy tosses the pumpkin with a horizontal speed of 2.8m/s to a 37kg girl (also wearing ice skates) catches it. What are the final speeds of the boy and girl?
- Center of Mass and Linear momentum Problem?
- The loss in weight of a solid when immersed in a liquid at 0°C is #W_1# and at t°C it is W. If the cubical expansion coefficient of solid and liquid are #gamma_s# and #gamma_l# resp then W is equal to?
- A boat downstream from A to B takes 7 hours, upstream from B to 9 hours. How much time does a log take from A to B? (Driftwood along the water velocity)
- 2 point masses each having mass #m# are placed at a distance #2a#.Escape velocity for a mass #m# projected from position P?
- How much force is needed to accelerate a #4.0# #kg# physics book to an acceleration of #2.0# #m##/##s^2#?
- What is the velocity of a train that traveled 420 miles northeast to northwest between two cities in 3.5 hours?
- Bats rely on sound localization to be able to fly during the night. On a cool 20°C summer night, a bat produces an ultrasonic sound with a frequency of 39 kHz. What is the wavelength of this ultrasound, in meters?
- A concave mirror produces an image on a wall that is 30.0 cm high from an object that is 6.5 cm high. What is the magnification of the mirror?
- An average force of 280 N acts for 1.2 seconds on a 78 kg circus performer as he is shot out of a cannon. (a) What impulse is applied to the performer? (b) What is the speed of the performer as he leaves the cannon?
- What are all the important formulas for the chapter Thermodynamics?
- A handball of mass 45 grams strikes a hard wall perpendicularly with an initial speed of 46m/s. The handball is in contact with the wall for 0.078 seconds, and then rebounds straight back with a speed of 39m/s. What average force was applied to the ball?
- A charge of 2 μC is located 48 cm above the origin. A second charge of -8 μC is located 48 cm below the origin. What is the magnitude and direction of the net electric field 20cm to the right of the origin?
- A force #F = (3t hat i + 5 hat j)N# acts on a body due to which its displacement varies as #S = (2t^2 hat i - 5 hat j) m#. Work done by this force in #2s# is?
- Calculate the number of electrons drifting per second through the filament of a 100 W- 220 V bulb , when glowing.(e = 1.6 * 10^ -19 )?
- Can you help me please?
- Calculate in joule the magnitude of the work needed to be done to lift 50 cubic meters of water to a height of 10 meters?
- A set of 25 tuning forks arranged in series of decreasing frequencies. Each gives 3 beats per second with the succeeding one. The first fork is the octave of the last. The frequency of the sixteenth fork in series is? (Use nth term of A.P)
- Please solve q 169?
- Please solve q 170?
- Time period of a simple pendulum is 2sec if length is increased four times then its period becomes?
- What is Newton's third law?
- Please solve q 167?
- The height of geostationary orbit is 42300km from the centre of earth its height above equator will be ?
- How can you increase the gravitational potential energy (GPE) of an object?
- What is the Fermi level? I heard it is also called the chemical potential.
- Weight of a body of mass M decreases by 1% when it is raised to a height h above the Earth surface if the body is taken to a depth age in a mine then its weight will decrease by what percent?
- You can walk on water if you wear large shoes shaped like boats.calculate the length of shoes that will support you?assume that will support you:assume that each shoe is 0.3m *0.3m in the cross section
- One gear wheel turns another, the teeth being on the rims. The wheels have 60-cm and 70-cm radii, and the smaller wheel rotates at 20 rpm. What is the angular speed of the larger wheel, in radians per second?
- 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?
- A driver in a car traveling at a speed of 21.8 m/s sees a car 101 m away on the road. How long will it take for the car to uniformly decelerate to a complete stop in exactly 99 m?
- Physics Problem?
- When Maggie applies the brakes of her spinning car, the car slows uniformly from 15.0 rad/s to 0.0 rad/s in 2.50 s. How many radians will the car have traveled before coming to rest?
- Physics? I tried it and my incorrect answer is show below please help
- Find the voltage in the middle of this circuit?
- A simple pendulum sits on a merry go round moving with #4m/s# and having a radius of #2m#. Calculate the time period of the pendulum?
- It takes 4.5 second a for a windmill to make a rotation. Each blade extends 116 feet from the central hub that is 6 feet in diameter. How much faster(in miles per hour) is the tip of the blade moving than the base of the blade?
- Please solve q 132?
- 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?
- If one cart was at rest, and was struck by another cart of equal mass, what would the final velocities be for a perfectly elastic collision? For a perfectly inelastic collision?
- Jimmy runs #1# #1/4# kilometers in 5 minutes. Rachel runs #2# #1/2# kilometers in 10 minutes. Whose speed is greater?
- Distinguish between hypermetropia and myopia?
- A passenger train takes one hour less for a journey of 150km if its speed is increased by 5km/hr from its usual speed. How do you find the usual speed of the train?
- Please solve q 99?
- Air resistance depends on what factors?
- A bucket filled with water weighing 50kg is raised from a well of depth 100m.if the linear density of the rope is 1kg per metre.then the work done is?
- Please solve q 126?
- When ball comes down then energy is?
- Dimension of Specific Resistance?
- A transformer has 150 turns in the primary coil and 20 turns in the secondary coil. When a 120-V potential difference is applied to the primary coil, what is the potential difference in the secondary coil?
- What is the difference between momentum(m×v) and kinetic energy (#1/2mv^2#)of an object?
- What are the basic units of density ?
- What is the kinetic energy of a 2,000 kg boat moving at 5.0 m/s?
- What is the electric force between two charges of 5 nC and 20 nC when the distance between them is 10 cm?
- What is the barbell’s mass?
- What is the SI base unit of time?
- An airplane is flying in a horizontal circle of radius 1.5 km with a speed of 450 km/h. What is the magnitude of the centripetal acceleration of the plane?
- Question #37f58
- A net force of 15 N is exerted on a book to cause it to accelerate at a rate of 5 m/s2. What is the mass of the book?
- What is the work done by a 2.4 N force pushing a 400 g sandwich across a table .75 m wide?
- Please solve q 82?
- If an object is projected at angle of Φ to the horizontal.it's maximum height is 8m.what is the time taken to reach the maximum height?.(g=10m\s)
- What are the units of #k# in the expression #F=kv^n# (a) when #n=1# and (b) when #n=2#?
- Please help for physics question?
- What is the instantaneous velocity of an electron orbiting a lithium atom at a radius of #90# picometres?
- A voltage of #180# #V# is placed across a substance. The current begins higher, but as the substance's temperature changes it falls to #6# #A#. What is the resistance of the substance at this point?
- What is the difference between a step-up and a step-down transformer?
- A particle revolving in a circular path completes 1st one third of circumference in 2 sec while next one third in 1 sec . The average angular velocity is..???
- What is the frequency of a wave with a wavelength of 16 m traveling at 300 m/sec?
- What is the ball’s speed as it emerges from the pipe onto the green?
- The ratio between the centripetal force of body in (A) to that in (B) is.?
- A mass of 4.5 kg is attached to a vertical spring with a spring constant of 200 N/m. How do you determine the frequency of the oscillation when the spring is set into motion?
- A cyclist riding a cycle fitted with a dynamo to a tyre gets bright light in the bulb connected, when he pedals fast. This is because?
- Can displacement ever be greater than distance? If so, how?
- A ball is thrown horizontally from a height of #24 m# and hits the ground with a speed that is five times its initial speed. What is the initial speed?
- Mechanics question help ?
- What is the speed of radiowave of frequncy 543MHz?(X=0.55m)
- How would you calculate the speed (in #m/s#) of a skateboarder who accelerates from rest for 4 seconds down a ramp at an acceleration of #3 m/s^2#?
- The angular displacement covered by hours hand of a clock after one hour will be equal to.......?
- (a) At what time does the cart reach its farthest distance from the first sensor? b) How far from the first sensor does this happen? (c) What is the acceleration at that spot?
- A wire of length #"1000 m"# has a resistance of #"10 π Ohm"#, if it's cross sectional area is #0.005 m"^2#, determine its resistivity?
- A 14.0- N box is at rest on an inclined ramp. The ramp makes an angle of 15 degrees to the horizontal, and the coeficient and the static friction between the ramp & the box is 0.344. What is the mass of the box?
- What was Burrell’s mass? (physics)
- How far have you pushed the car?
- How to do 69th question?
- What is the magnitude of the net force exerted on the cement?
- An object with volume 6.0*10^1 m^3 and mass of 2.600*10^4 kg will have bouyancy force,in ethyl alcohol?
- A thoroughbred racehorse accelerates uniformly at 7.5 #"m/s"^2# reaching its final speed after running 19.0 m. If the horse starts at rest, what is its final speed?
- How do you know an object is moving?
- A particle moves in a straight line .1/3rd of its journey with velocity V1,next 1/3rd with velocity V2,next 1/3rd with velocity V3.How to prove that its average velocity is ;3v1v2v3 ÷ v1v2 + v2v3 + v1v3?
- A ball is thrown upward from the ground with an initial speed of 25 m/s; at the same instant, another ball is dropped from a building 15 m high. After how long will the balls be the same height?
- Mechanics question help on forces?
- How to solve the following circuit of resistors?
- Which of the following scalar quantity ? 1)enrgy 2)torque 3)momentum 4)all
- The minimum energy of light ray pass through the vacuum is 47J calculate its mass?
- Why gravitational acceleration is zero at the centre of the Earth maximum at the poles and minimum at the equator?
- Can you help with velocity of a boat please.?
- Help, please ,An ultrasonic sensor is used to measure the level of water in a large water tank with height of 5m ?
- A body of mass 16 kg accelerates vertically down with a force of 8 N. What is the minimum force required to make it move upward with the same acceleration? [Take #"g = 10 m/s"^2#].
- What are the units for frequency?
- Does the speedometer of a car read average speed or instantaneous speed? How do you know?
- How much energy in Joules is required to raise the temperature of #"12.2 g"# of solid nickel from #"20.4"^@"C"# to #"35.7"^@"C"#?
- How to do 187th question?
- A Hollow charged metal sphere has radius r .If the potential difference between its surface and a point at a distance 3r from the centre is V ,then the electric field intensity at a distance 3r from the centre is?? thank u!!
- Which type of energy is transferred from one object to another by simple machines?
- What is the Quantum theory of light in an intuitive explanation?
- Mechanics help please?
- Can you answer the question number 5 here?
- If vector a is added to vector b, the result is the vector c = (7.00, 3.00). If b is subtracted from a, the result is the vector d = (−4.50, 9.25). what is the magnitude of a? what is the magnitude of b?
- The distance from A to B is 116km.A cyclist starts from A towards B at a steady speed of 16kmh.An hour later,a motorist starts from B for A and travels of an average speed of 48kmh.How far from A do they meet?
- Why is angular momentum of the disk itself conserved?
- A tank open on top has a depth h and is filled with water. A hole is made three-quarter from the ground and another hole is made half the depth. What is the difference in the range of water ejected through these holes?
- What would the strength be if we cut a lens in half?
- The mass of Earth is #5.9*10^24# kg. The mass is 13,000,000,000,000,000,000,000 kg. Compared to Pluto, how much greater is Earth's mass than Pluto's mass?
- How to do 189th question?
- Please solve q 10?
- If #vec A + vec B= vec C#, what is the magnitude of #vecC#, if #vecA# and #vecB# are unit vectors at right angle to each other?
- What is quantum theory?
- How electron and energy related together?
- Two vectors are given by A ⃗= i+j and B ⃗= 3i+4j. Find the magnitude of A ⃗ and B ⃗?
- How does the speed of sound in water compare to the speed of sound in air?
- Heat transfer... variable area. ?
- What is the order of magnitude of 0.000746?
- A toaster is used an average of 5.0 h a month. The toaster draws 8.0 A of current from a 110 V outlet. If electricity costs 8¢ per kW•h, how much will it cost to operate the toaster for one year?
- Mechanics particle and tension help please?
- What is Tμν mean in einstein field equation?
- Which of the following quantities is different from the others?
- How much work is done on a gas that is compressed from a volume of 1 x 10-3 m3 to a volume of 0.3 x 10-3 m3 at a constant pressure of 2 atmospheres (assuming the temperature stays the same)?
- In terms of motion, when a jet fighter is sitting stationary on the tarmac it has something in common with when it's flying on a straight course at 3000 km/h. Explain?
- Please send q 15?
- A bead of mass #m# can slide on a thin vertical rod,with sliding coefficient #mu =0.4#.The rod is translated horizontally with a constant acceleration of #a#. QUESTION below.?
- Two plane mirrors are inclined at an angle #theta# . Light ray is incident parallel to one of the mirror.For what value of #theta #ray will retrace it's path after third reflection. ?
- How much would a 50-kg object weigh on Mercury (gravity on Mercury is 3.59 m/s2)?
- What factor must be increased to give a machine a mechanical advantage greater than 1?
- If ke of a body increases by 0.1 the percentage increase in its momentum will be?
- What length would the object have to slide along the ramp? (question 2)
- A net force of 16 n causes a mass to accelerate at a rate of 5m/s. What is the mass?
- A frequency of variation of kinetic energy of a simple harmonic motion of frequency n is?
- Solving this electronic problem with impedance ?
- How does the path of a light ray change when it moves from a less-dense into a more-dense medium? What do we call the ratio of the speed of light in a denser medium to its speed in a vacuum?
- A charged particle is placed in the electric field E. If the charge on the parjicle is doubdle ,the force exerted en the particle by the fiwld E is? a)Halved b)unchange c)Doubled d) None of these
- Amass difference of 0.0012u is equivalent to energy of?
- A Force of 6 N acts horizontally on a stationary mass of 2 kg for 4 sec. The K.E gained in Joule is...?
- For the P-V diagram given for an ideal gas, the T-P graph is=?
- What is Ohm's Law?
- A #0.473# #kg# object is pushed down #1.087# #m# on a spring with spring constant #K=312.4# #Nm^(-1)#. When the spring is released it is shot out at an angle of #49.8^o# to the horizontal. How far does it fly before striking the ground?
- In a collision, a vehicle decelerates at #-65# #ms^-2# for #9.4# #s#. What was its initial velocity? What was its velocity after it had been decelerating for #3# #s#?
- (i) What is the velocity of the object just before and just after it collides with the wall. (ii) How far is the original starting point of the object from the wall, and how far from the wall does it travel before stopping after colliding with the wall?
- How much kinetic energy does a 7.2-kg dog need to make a vertical jump of 1.2 m?
- Please solve q 22?
- An archer fires an arrow at a velocity of #40# #ms^-1# and an angle of #45^o# to the horizontal, from a point #1.5# #m# above the ground. Will the arrow reach a tree #400# #m# from the archer?
- If the molar mass of nylon is #10,000# #gmol^-1#, how many nylon molecules will there be in a #1.0# #kg# piece of nylon?
- How to do 180th question?
- A sample of a substance that has a density of 0.824 g/mL has a mass of 0.451 g. What is the volume of the sample?
- An Empty plastic box of mass M is found to accelerate up to the rate of G by 6, when placed deep inside water. How much sand should be put inside the box so that it may accelerate down the rate of G by 6?
- Two particles A and B of equal mass M are moving with the same speed v as shown in the figure. They collide completely inelastically and move as a single particle C. The angle θ that the path of C makes with the X-axis is given by :?
- A spring balance has a scale that reads from 0 to 50 kg.The length of the scale is 20 cm.A block of mass #m# is suspended from this balance,when displaced and released,it oscillates with a period 0.5 s. What is the value of #m#?[#g=10 "m" s^(-2)#]
- A 3kΩ resistor has a current of 0.002A flowing through it. what is the potential difference?
- One mega watt hour is equal to.....?
- Please solve q 24?
- What is the difference between temperature and heat ?
- Two objects have been touching for hours.What can you conclude about their temperatures?Explain
- Can anyone help me finding the ans?plz explain!
- How far does light travel in 20 seconds?
- What is thermodynamics?
- Could you explain why two springs in parallel have a smaller extension than a single spring?
- When can nuclear fusion and nuclear fission reactions take place?
- The acceleration with which an object of mass 100 kg be lowered from a roof using a cord with a breaking strength of 60 kg weight without Breaking The Rope is ?
- Can you help me solve the problem and how i would solve it?
- determine: a) the capacitance? b) the maximum voltage that can be applied to a parallel plate capacitor filled with teflon, which has a plate area of 1.75 cm ^ 2 and plate separation of 0.040 mm?
- Explain when a ball is dropped from roof of a building,is motion uniform or non uniform?
- A string is made to vibrate at its third harmonic. The diagram shows two points P and Q at a particular instant in time. Which of the following compares the period of vibration of P and Q?
- How to do 174th question?
- An object has an x-momentum of 8.5 kilogram-meters/second and a y-momentum of 9.8 kilogram-meters/second. What is the resultant momentum of the object?
- Need an explanation of soft body stretching, tearing, cutting, bending?
- A small block is placed on a wooden planks which is undergoing SHM in vertical direction with a period of T. Find the maximum amplitude of motion so the block doesn't live the plank?
- Which curve is more steeper, isothermal or adiabatic? Explain please
- A medical lab has 16gram of sample of radioactive isotope after 6hours it found that 12gm of sample have decayed the half life of isotope is?
- One more physics question. Brief explanation needed. ?
- As a shuttle bus comes to a sudden stop to avoid hitting a dog, it accelerates uniformly at #-4.1# #m##/##s^2# as it slows from #9.0# #m##/##s# to #0.0# #m##/##s#. What is the time interval of acceleration for the bus?
- If the hydrogen in a hydrogen lamp was molecular hydrogen (H2) rather than atomic (H), what would the main differences in the observed spectrum be?
- A small block is placed on a wooden plank which is undergoing SHM in vertical direction with a period of T.What is the maximum amplitude of motion so the block does not leave the plank?
- A radioactive element has a half life of 6 minutes if initial count rate is 824per minute the time taken by it to reach a count rate of 206 per minute is a) 20min b) 15min c) 12min?
- Help with physics?
- If a force of 50 N stretches a spring 0.10 m, what is the spring constant?
- A model rocket is launched from a raised platform at a speed of 112 feet per second. Its height in feet is given by h(t) = -16t 2 + 112t + 20 (t = seconds after launch). After how many seconds does the object reach its maximum height?
- What is the maximum velocity of an object that can travel on land of earth?
- A rocket is shot vertically off the ground with an initial velocity of Vo ft/sec. The equation that gives its height s above the ground at time t is: s= s(t) = -16t^2 + Vot What does one do to find time when the rocket reaches its highest point?
- Please help me answer this question, I have no clue on how to solve it?
- A. At what point in it's motion is the kinetic energy of the end of a pendulum greatest? b. At what point is the potential energy of a pendulum greatest?
- In physics, how is energy related to wavelength and frequency?
- A problem about the work done by gravity on a projectile?
- Explain why the resistance of several resistors in series is increased if an additional resistor is connected in series with them? [4 marks]
- A toy rocket weighing 10N blasts from ground level. At the exact top of it's trajectory it's energy is 140J. To what vertical height does it rise?
- If it takes an electric toy train 5 seconds to pull a coal car 1.5 m, and it exerts a constant force of 4 N during this time, what is its power?
- Why does a falling object eventually slows down?
- Work out? -two bodies are placed one meter a part. How much further should they be displaced in order to reduce the gravitational force between them by 1/16------? Thanks
- What are the primary colors of light? Pigment?
- Define escape velocity and its expression?
- A petrol engine with an energy efficency of 45 percent produces 1500 joules of mechanucal energy what is the chemical potential energy of petrol?
- A train is traveling from New Orleans to Memphis at a constant speed of 79 mph. New Orleans and Tennessee are 395.1 miles apart. How long will the train take to reach Tennessee?
- A 2.26 kg bunk is dropped from a height of 1.5 m. What is its acceleration, and what is its weight in newtons?
- Magnetic field?
- Two faraday of electric charge produces 30g of any element X(A=45) at the cathode.What is the formula of the ion of X? the answer is X with +3 charge, any explanation pls?
- In which medium would sound travel the fastest?
- How to do 164th question?
- What are the laws of refraction?
- The displacement of a particle is related with time as #x^2=t^2+2t+3#. How acceleration is related with displacement?
- Analayze the unit and express the quantity in the basic unit of the metric system Density of 8.880 g/cm^3 = ?
- How has Electromagnetic Spectrum impacted society?
- Which has more momentum, an object with a mass of #5kg# moving at #8m/s# or an object with a mass of #2kg# moving at #7m/s#?
- A car travels 30km at a uniform speed of 40km/hr and the next at 30km at a uniform speed of 20km/hr. Find the time taken?
- The length of a pendulum that has a period of 1.8 seconds is how many feet approximately?
- Imagine,a pond with 100m depth,from the bottom an iron ball is projected.It reached 80m up and when it's about to come down all the water vanished suddenly. Will its final velocity(while coming down)be more than its initial velocity(while going up)?
- If a body moves from rest in a straight line with nan acceleration (a) and another one with an acceleration (2a) covering the same distance ,the ratio between time of motion of the first body yo the second one is.....?
- A 15-kg box is resting on a wedge which has an angle of inclination of 30° and a coefficient of friction 0.15. What is the value of gravity's vector?
- What factor affects the transmission of an electromagnetic wave through a medium?
- How much power is used to drive a cart with a mass of 5500kg, initial velocity of 0ms, final velocity of 37.4ms within 7.8 seconds?
- A stone whirled at the end of a rope 30cm long,makes 5 complete revolutions in 25secs.Find 1.Angular velocity in rad/sec 2.The linear velocity 3.Distance covered in 4secs?
- What is full from of SONAR?
- A 34N force is applied to a 213kg mass. How much does the mass accelerate?
- Name the characteristic of sound which depend on amplitude?
- Two spheres having mass 10 gram and 25 gram are projecte horizontally from the same height with velocities V1 and V2 and they fall to the ground in time interval T1 and t2 respectively if the ratio of v1:V2 is 1:3 the ratio t1 is to T2 will be?
- A ball is dropped from a height of 7.2 M it bounces back to 3.2 after striking the floor the ball remains in contact with the floor for 20 MS given that G is equal to 10 M per second square the average acceleration of the ball during contact is?
- The dot product of force and velocity gives?
- A glass marble projected horizontally from the top of a table Falls at a distance x from the edge of the table if h is the height of the table then the velocity of projection is?
- What is the velocity of a car that traveled a total of 75 kilometers north in 1.5 hours?
- What's a form of kinetic energy that an electric current carries?
- Find the range of velocities of the blocks shown in the figure below during the motion? How do we solve this problem without seeing from the center of mass frame?
- Two charges, are placed on the x-axis (see below). If charge B is moved to #x=oo# then, the potential at the origin is #200 "kV"#. If charge B is moved to #x = 7# m, the potential at the origin is equal to #0"V"#. What is the charge of B?
- 5.does light travel from water into air for every angle of incidence? Explain why?
- What is the kinetic energy of a 2,000-kilogram boat moving at 5 m/sec?
- What is the magnitude of the force a 1.5 x 10^6 C charge exerts on a 3.2 x 10^4 C charge located 1.5 m away?
- Can someone help me with this?
- Find the magnitude and direction of the magnetic field in terms of #mu_0#, #I#, #r#, and #a# at (a) point #P_1# and (b) point #P_2#? (picture attached)
- The density of brass is #8.89" g/cm"^3#. What is the density in kilograms per cubic meter?
- Two vectors of equal magnitude an incline to each other at an angle x keeping the direction of one of them fix the other is rotated through an equal angle x now the resultant of these vectors has the same magnitude as each of the two vectors. So #/_x# is?
- Who predicted that light behaves as both waves and particles?
- If the speed of light determines the time,then,how did they measure it?????
- Why does the momentum of the object increase when it falls freely ?
- A solid sphere is rotating about an axis passing through its center of mass with angular velocity #omega#. The sphere itself is in a circular motion about the axis PQ with an angular velocity #omega'#. Calculate its moment of inertia about PQ?
- When a car drives down a street, what energy conversions are happening?
- An astronaut has a mass of 100 kg and has a weight of 370 N on Mars. What is the gravitational strength on Mars?
- Negative charges are attracted to each other. True or False?
- What is an example of the application of newton's third law?
- 10mm is how many m?
- Please Help!!?
- A projectile is shot vertically up in the air from ground level. Its distance h, in feet, after t seconds is given by h = 96t – 16t2. Find the values of t when h is 96 feet?
- How to solve the problem?
- How to Find velocity when distance = 1051km and time=17 hours 3 minutes?
- A wire of resistance 4ohm is bend in circle then its resistance?
- You and a friend are pulling on opposite end of a rope. Both of you are exerting a force of 200N . What force is being exerted in the middle of the rope?
- A 3.96 kg rock is dropped off a 126.3 m tall bridge. How much time, in s, passes before the rock hits the water?
- How to complete this electrical current table?
- If 45j of work are needed to push a shopping cart down a 96m aisle, how much force is needed?
- A) what is the wavelength of a radio wave that operates at 98.1MHz? b) what is the period of this wave?
- A student uses a force of 16N to lift their bag while doing 52j of work. How far did the student lift the bag?
- The force with which Earth pulls on the Moon is? a) somewhat greater than Moon's pull on Earth b) equal in magnitude to the force that Moon pulls on Earth. c) the only force acting between Earth and Moon.
- Is there any difference between gravitational force and gravitational energy? What is it?
- A telescope has focal length of objective and eye piece as 200 cm and 5cm respectively.what is magnification of telescope...???
- A girl 60kg stands at centre of a playground mery-g-round rotating about frictionles axle at 1 rad/s.treat m-g-round as a uniform disc(m=100kg radius=3m). If the girls jumps to a position 1m from the centre, what will be their angular v after she landed?
- What did Henri Becquerel discover?
- The angle between a ray of light and a line perpendicular to a mirror is 22 degrees22°. What is the angle between the ray of light and the plane of the mirror?
- If the speed of rotation of AC generator is made four times of its initial value then what is the percentage increase in induced emf?
- Can someone help me with this task?
- A wave travels 40 meters across a field of grass in 4 minutes. What is the speed of the wave?
- What is the force that opposes the motion of objects through air called?
- If a red apple is red by reflection, is it really blue apple?
- For the largest mechanical advantage, would you place a lever's fulcrum closer to the input or output force?
- Two cells of emf e1 and e2 are joined in series and the balancing length of the potentiometer. wire is 625 cm. if the terminals of e1 are reversed the balancing length obtained is 125 cm. given e2>e1 the ratio e1:e2 will be?
- How to compare the relative change in momentum of two blocks attached by a pulley?
- How to solve this ??
- How is gravitational force affected by mass?
- I’m stuck on this help please ?!
- Can anyone explain me clearly about the energy and it's changes in Simple Pendulum? Plz!
- What is the force, in terms of Coulomb's constant, between two electrical charges of #1 C# and #-2 C# that are #4 m # apart?
- A gas at a constant pressure of 95 kPa does 110 J of work as it expands from the volume #V# to the volume #2V#. What is the volume #V#?
- A rope of length L is pulled by a constant force f. what is the tension in the Rope at a distance x from the end where the force is applied?
- When water is flowing through a pipe with a speed V then its speed V is proportional to?
- If the electric potential is given by #V=4xy^2z#, where #V# is in volts and #x, y,z# are in meters, what is the magnitude of the electric field at the point #(4.00hati,−2.00hatj,4.00hatk) m#?
- A golf ball is hit an angle of 35 degrees above the horizontal and it lands in a hole 120 m away 4.2 s later. Air resistance is negligible.?
- A ferris wheel has a diameter of approximately 50 meters. The wheel rotates once every 6 minutes. Find the linear speed at the outer edge of the ferris wheel in meters per hour?
- A ferris wheel has a diameter of approximately 50 meters. The wheel rotates once every 10 minutes. Find the linear speed at the outer edge of the ferris wheel in meters per hour.? The linear speed is approximately ____ meters per hour.
- Two charged objects, A and B, are exerting an electric force on each other. What will happen if charge on A is increased?
- Electrostatics?
- Why will lamp 1 light as much as before if lamp 2 gets broken? And why will the ammeter show more current if lamp 2 is working?
- An aircraft carrier made a trip to Guam and back. The trip there took three hours and the trip back four hours. It averaged 6 km/h on the return trip. What is the average speed of the trip there?
- If any object enters the gravitational field the potential energy of the object in order is transformed into kinetic energy therefore it reaches the ground.what form of energy is converted into potential energy?
- Marcelo and Jesus are playing tug of war. Marcelo is pulling left one end of a rope with 10 N of force. Jesus is pulling the rope in the opposite direction with 12 N of force. Who is pulling the rope harder and by how many more Newtons of force?
- A clean nickel surface (work function 5.1eV), is exposed to light of wavelength 206nm. What is the maximum speed of the photoelectrons emitted from this surface?
- I only want answer for (iii) part. In book it's given 4.5 cm/#"s"^2#. Is this correct? If not, please give solution. Thanks!
- How can a boomerang return?
- "Energy is neither created nor destroyed but can be changed from one form to another"Now,imagine an object at 10m height from ground, so it has potential energy, if earth disappears suddenly what will happen to its energy?
- A vector A points vertically upwards and vector B points towards north. What is the direction and magnitude of vector product A*B?
- Lenses are engineered to have specific focal points. besides the curvature of the two sides of a lens, what determines the focal length?
- A ball is projected vertically upward with a velocity of 30m/s. 2s later another ball is released from the top of a story building 80m tall. Determine after what time the balls bi pass each other and at what height do they bi pass?
- A)Detemine the horizontal force (F) required to move the plate across the factory floor.? b) Determine the mass of the plate?
- In which case we should use #I=I_0sinomegat# and #I_(rms)=I_0/sqrt2# and what is the difference between this two Current for two different equation? Two equations are related to alternating current.
- Two pellets, each with a charge of 0.70 microcoulomb (7.0×10^-7 C ), are located 4.0 cm (4.0×10^-2 m ) apart. Find the electric force between them.What would be the mass of an object that would experience this same force in Earth's gravitational field?
- Projectiles q. How to solve part c) please?
- 1000 small water drops each of capacitance c. join Together to form one large spherical drop. the capacitance of the bigger sphear is?
- What is the new angular speed of the merry-go-round (in rev/min)?
- Question details is given in picture below?
- What is the first law od thermodynamics? How is this law applicable to the Earth's energy balance?
- How many kilometers would it take for light to travel in 4 1/2 minutes?
- A water balloon is catapulted into the air so that its height H , in meters, after T seconds is h=-4.9t=27t=2.4.Help me solve these questions?
- A fifth harmonic standing wave is set up in a closed-ended pipe that is 1.4 m long. If the frequency of the wave is 239 Hz, what is its velocity?
- A meter stick is balanced at its centre (50cm). when 2 coins, each of mass 5g are put one on the top of other at 12 cm mark it is found to be balanced at 45cm what is mass of stick?
- A particle is projected upwards with velocity 60m/s. what will be the pathlenght after 8 second?
- Eight spherical rain drops of same mass and radius are falling down with a terminal velocity of 6 cm/s. If they coalesce to form on big drop. what will be its terminal speed? Neglect the buoyancy due to air? a)1.5cm/s b)6cm/s c)24cm/s d)32cm/s
- A fourth harmonic standing wave is set up in a 3 m long guitar string. If the frequency of the wave is 191 Hz, what is its velocity?
- A baseball has a mass of 0.34 kg. A pitcher throws a 60 m/s fastball. What is the momentum of the baseball?
- After a system is added 40-J heat, the system does 30-J work. How do you find the change of the system’s internal energy?
- How does this allow us to measure the potential difference across a diode?
- Water flows through a hosepipe whose internal diameter is 2 cm at a speed of 1 m by second.what should be the diameter of the hole if the water is to emerged at speed of 4 m/s?
- An object falls freely from rest near the surface of earth. What is the speed of the object when it has fallen 4.9 meters from its rest position ?
- The first law of thermodynamics is also known as what?
- A man took 49.17 s to swim the 50.0-m length of the pool and swim back. Assume that half of his record time was spent traveling the length of the pool. What was his speed?
- A racing car initially at rest accelerates at uniform rate of 5.5 m/s2 for 10s.Calculate: (1)distance covered by racing car from start (2) final velocity in km/h?
- A simply supported beam in figure 2 is subject to two concentrated loads.Find support reactions Ra and Rb.?
- A chair that has a mass of 7.26 kg is accelerating at 1.27 m/s/s. What is the force?
- A body lying initially at point (3,7) starts moving with a constant acceleration of 4i. What is it's position after 3 seconds in co-ordinates?
- A helicopter’s speed increases from 25 m/s to 60 m/s in 5 seconds. What is the acceleration of this helicopter?
- A particular object is projected vertically upwards from the ground.After t- seconds it’s height is h, m, where h = 50t-5t^2 Find the greatest height reached and the times when the particle is 120m highland it’s speed st these times?
- Four bulbs of 10w,20w,30,and 40w are connected in series which bulb will shine more.which will shine more when connected in parallel??
- Find the time period of the S.H.M described by #x=3*sin(pi/2t)#?
- How are IR rays used in television remote controllers?
- The pulley shown in the figure has a moment of inertia I about its axis and mass m. Find the time period of vertical oscillation of its center of mass. The spring has spring constant K and the string does not slip on the pulley?
- Please Help?
- A simple pendulum having a bob of mass m undergoes small oscillations with amplitude #theta_0#. Find the tension in the string as a function of the angle made by the string with the vertical?
- Two electron are moving towards each other with a velocity of #10^6 m/s# what will be the closest distance of approach between them?
- Two people are standing at a place A and B respectively at a distance 120km apart. Person 1 can run at a speed of 5km/hr and person 2 can run at a speed of 7km/hr . Both of them start running from A and B respectively. When and where will they meet?
- What happens to resistivity(ρ) when area of cross section of material is doubled and length is halved?
- A manometer containing mercury is connected to two points A and B 15 m apart, on an inclined pipeline conveying water as shown.?
- B. Why a spoon in a cup of tea appears broken ?
- What is the final velocity(v)? Given: u=0, mass of the object=10kg, BC=10m, ABC is right-angled, and angle CAB=30 degrees. Refer to the image:
- Car accelerates uniformly from rest to reach velocity (v) and covers distance (d) then the velocity of the car when it covers distance equal 2d ?
- "Energy is neither created nor destroyed but can be changed from one form to another."An object at rest in space now our earth goes near to it.we know it will be attracted by earth i.e it gets kinetic energy from where does it get this energy?
- A free falling object having some kinetic energy hits the ground and comes to rest,now where its kinetic energy has gone?
- It has been estimated that there are 1 x 10 to the 86th particles in the visible universe. If that is true, what would be the diameter of a ball of gold that has the same number of particles?
- Jack and Annie push a cart to the left with forces of 3 N and 4 N, respectively. If the cart is stationary, what is the force of friction?
- 85-N box pushed across horizontal floor. it is slowing at a constant rate of 0.90 m/s. The push force has a horizontal component of 20 N and a vertical component of 25 N downward. Calculate the of kinetic friction between the box and floor?
- The work done during a isochoric process is?
- A cyclist is travelling with speed 18m per second. The cyclist stops pedaling and comes to rest without breaking due to resistance forces totalling 120 Newton. Describe one limitation in this model?
- 3 particles start from origin with velocity #u_1,u_2 and u_3#.They are moving with constant velocities.Find the relation between #u_1,u_2 and u_3# so that all 3 particles lie on the same plane?
- A motorcyclist travels for 15 minutes at 120km/h, 1h 30mins at 90km/h and 15 minutes at 60km/h. At what speed would she have to travel to perform the same journey, in the same time, without changing speed?
- The horizontal distance x traveled by a soccer ball if it is kicked from ground level with an initial velocity of v and angle θ is x= (1/32)v^2*sin 2θ. Find the distance traveled if the initial velocity is 50 feet per second and the angle is 30°?
- The position of an object moving on the x-axis at time t is x=t³-6t²+9t+5 m. Determine the position of the object when the velocity is zero? 2. The position when the acceleration is zero? Thanks
- Help with physics newtons law?
- A particle moves in the x-y plane with velocity #v_x#=#8t-2# and #v_y#=2.If it passes through the points #x=14# and #y#=4 at #t#=2,what is the equation of the path?
- Suppose that water waves coming into a dock have a velocity of 1,2 m/s and a wavelength of 2.4m. With what frequency do these waves meet the dock?
- How amount of voltage should be supplieid to holfman voltameter in order to find the composition of water by volume and by mass?
- A stone is dropped from a helicopter hovering at a constant height of 490m. How long before the stone reaches the ground?
- Index of refraction?
- A sound wave travels at 340 meters per second. How far from the source the wave has traveled after 0.50 seconds?
- A 1.55 kg particle moves in the xy plane with a velocity of v = ( 3.51 , -3.39 ) m/s. Determine the angular momentum of the particle about the origin when its position vector is r = ( 1.22 , 1.26 ) m. ?
- What is the mass of an object that needs a force of 6600 N to increase its speed from rest to 107 m/s in 2.3 seconds?
- Two electric bulbs P and Q have their ratio in the ratio 1:2.They are connected in series across a battery.find the ratio of the power dissipation in these bulbs?
- Explain the following? 1.Sound can travel through solids. 2.Sound can travel through liquids. 3.Sound can travel through air.
- 40 Coulombs of electricity was applied over a 793 second time period. What was the current expressed in mA?
- In a thermometer the ice point is marked as #10# degree Celsius,and steam point as #130# degree Celsius .What will be the reading of this scale when it is actually #40# degree Celsius?
- One gamble measured in air has a weight of 100 N. When immersed in the water, its weight is 75 N. How much is the dice side? The density of the water is #1000 (kg) / m^3# .
- Young's modulus of elasticity for #"A"# and #"B"# are #"Y"_"A" = 1.1×10^11\ "Pa"# and #"Y"_"B" = 2.0 xx 10^11\ "Pa"#. Which is more elastic and why?
- A billiard ball of mass .155 kg moves with a velocity of 12.5 m/s toward a stationary billiard ball of identical mass and strikes it in a head on collision. The first billiard ball comes to a complete stop. Was the collision elastic?
- A particle is projected from ground with speed 80m/s at an angle 30° with horizontal from ground.What is the magnitude of average velocity of particle in time interval t=2s to t=6s?
- A ladder rests against a wall at an angle of 60degree to the horizontal. The ladder is 8m long and has a mass of 35kg. The wall is considered to be frictionless. Find the force that the floor and wall exert against the ladder?
- A uniform slender rod of mass m and length L is released from rest, with its lower end touching a frictionless floor. At the initial moment, the rod is inclined at an angle #theta = 30^0# with the vertical?
- A particle is projected with velocity U makes an angle theta with respect to horizontal now It Breaks into two identical parts at the highest point of trajectory 1part retraces its path then velocity of the other part is?
- How to calculate the net force required for the system of pulleys to move at a given acceleration?
- Two milk bowls are at 35degreesCelsius & 38degreeCelsius. When these two bowls are kept in refrigerator at 4degreecelsius, then which milk-bowl cools down quickly?
- What is the phase difference between two simple harmonic motions represented by #x1=A sin(omegat +pi/6)# and #x2=A cos omegat# A. #pi/6# B. #pi/3# C. #pi/2# D. #(2pi)/3# ?
- A child of height 2.4ft is standing in front of the mirro.his brother of height 4.8ft is standing behind him.the minimum height of the mirror required so that the child can completely see his own image n his brothers image in the mirror is?
- Two bodies of masses #m1# and #m2# are separated by a distance #R#.The distance of the centre of mass of the bodies from the mass #m1# is #A.(m2R)/(m1+m2)#. #B(m1R)/(m1+m2)# #C. (m1m2R)/(m1+m2) ?
- From a laboratory on Earth, you observe a spacecraft traveling horizontally at a speed of 0.580 𝑐. You measure it to have a horizontal length of 5.80 𝑚 and a vertical height of 1.20 𝑚. What will be its length and height if it comes to rest in the lab?
- Two speakers on a horizontal axis both emit #440# Hz sound waves. The two speakers are #pi# radians out of phase. If there is to be a maximum constructive interference what is the minimum separation distance between the two speakers?
- Magnetic field?
- Equivalent resistance?
- Convert #5.34xx10^-16 # Joules to electron-volts?
- A 16 kg is accelerated from 5 m/s to 17 m/s in 4.0 seconds for a distance of of 3.0 m. How much work was done?
- An object travels in a circular path at constant speed. Which statement about the object is correct? A It has changing kinetic energy. B It has changing momentum. C It has constant velocity. D It is not accelerating.
- If the position of aparticle is given by x=5.0-9.8t+6.4t^2, what is the velocity and acceleration of the particle at t=4.0s?
- In an electric motor, say it has only one coil. The coil spins because of current in it. So, is there any electromagnetic induction process occuring simultaneously?
- What is the weight (on earth) of a 13.5-gram object?
- Upon reaching a downward velocity of 100 miles per hour, 300 newions of drag resist the diver's motion. How large is the skydiver's acceleration?
- Why can a baseball player hit a ball farther when he grips the bat near the bottom than he could if he moved his hands halfway up the bat?
- A ball rolls off the top of Stairway horizontally with a velocity of 4.5 M per second each step is 0.2 M and 0.3 M wide if she is 10 M per second square then the ball will strike the end step Where n is equal to?
- A plane is flying horizontally at 98 M per second and releases an object which reaches the ground in 10 seconds the angle made by 8 while hitting the ground is?
- A shell is fired vertically upwards with a velocity V1 from the Deck of a ship travelling at a speed of V to a person on the Shore observes the motion of the shell as parabola its horizontal range is given by?
- A train travels at 120 km/hr. It takes 5 hours for the train to travel from Seattle to Portland. How far away is Portland from Seattle?
- How much heat would be reqired to melt 10.0 g of ice at 0 oC, warm the resulting liquid to 100 oC, and change it to steam at 110 oC?
- 4 equal point charges each 16uC are placed on the 4 corners of a square of side 0.2m . calculate the force on any 1 of the charges?
- An object is thrown horizontally from a height how does the time of flight and the range of the object change when the magnitude of initial velocity tripled?
- Calculate the energy and frequency of red light having a wavelength of 6.80x10-5cm?
- Calculate the man’s mass. (Use PE = m × g × h, where g = 9.8 N/kg.) A man climbs a wall that has a height of 8.4 meters and gains a potential energy of 4,620 joules. What is his mass in Kilograms?
- Projectile Motion?
- A block of carbon is 2.3 cm long and has a square cross-sectional area with sides of 2.1 cm . A potential difference 8.7 V is maintained across its length. What is the resistance of the resistor?
- Consider three charges, #q_1=q_2=q_3=q#, at the vertices of an equilateral triangle of side #l#. What is the force on a charge #Q# (with the same sign as #q#) placed at the centroid of the triangle? Solve using parallelogram law of vectors.
- A heat engine with an efficiency of 17 % does 836 J of work in each cycle. How much heat must be supplied from the high-temperature source in each cycle?
- An open-ended tube is 7.8 m long. What is the wavelength of a third harmonic standing wave?
- Physics Problem Help Please! Newtons Laws?
- What is the electric potential at a height of #0.037m# above the plane if an infinite, non conducting plane with a surface charge density #sigma# is given by #+ 3.18 (pC)/m^2# (The potential at the surface of the plane 0 V.)?
- If a projectile is projected at angle #theta# of horizontal and it just passed by touching the tip of two walls of height #a#,seperated by a distance #2a#,then show that range of its motion will be #2a cot(theta/2)# ?
- What will be the unit of frequency when the wavelength is in "cm" and speed is in "cm/s"?
- Can you calculate the speed of sound knowing the temperature of the room? If so, what is the method?
- 5g of ice at #0^@C# is mixed with 5g of steam at #100^@C#. what would be the final temp.?
- A heating element of resistance r is fitted inside an adiabatic cylinder which carries a frictionless piston of mass m and crosssection A as shown in diagram. The cylinder contains one mole of an ideal diatomic gas. The current flows through the element ?
- If a bowling ball and pin collide with a velocity of 10.75m/s, how much force is exerted on the pin by the ball if they are in contact for 0.01 seconds? Why was the impulse equal?
- A transverse wave is given by the equation #y=y_0 sin 2pi(ft-x/lambda)# The maximum particle velocity will be #4# times the wave velocity if, A. #lambda =(pi y_0)/4# B.#lambda =(pi y_0)/2# C.#lambda =pi y_0# D.#lambda =2 pi y_0# ?
- Is the warming rays of the sun convection, conduction, or radiation?
- A car is driven 80 km west and then 30 km 45 degree south of west. What is the displacement of the car from the point of origin? ( magnitude and displacement).
- You drive 10 m/s for 15 s. How far did you drive?
- There are three parallel tracks of 120 km,between x and y.Train A starts at 9:00 am on the central track at speed of 60 km/hr from X.Train B starts at 10:00 am at speed of 60 km/hr from y.Train C starts at 11:00 am at 9 km/hr from x.------(continued)?
- If no external forces act on a moving object, it will? a) move slower and slower until it finally stops. b) come to an abrupt halt. c) continue moving at the same speed. d) none of the above
- The spin-drier of a washing machine slows down uniformly from 880 rpm (revolutions per minute) to 260 rpm while making 50 revolutions. Find the angular acceleration through these 50 revolutions. Express your answer in rad/s2?
- A NASCAR of mass 1400kg has broken down on pit lane. The coefficient of static friction between the tires and the road is 0.55. How hard would the crew have to push to accelerate the car at 3.60m/s²?
- A hot coffee at 80 c is left in a room at 20 c.it is found that after 20 minutes in the room, the temperature of coffee has decreased by 20 c. Determine the temperature of coffee after 30 minutes?
- A roller coaster starts from rest at its highest point and then descends on its (frictionless) track. Its speed is 30 m/s when it reaches ground level. What was its speed when its height was half that of its starting point?
- A bullet of 5gm moving at 200 m/s strikes a fixed plank of thickness 0.2 m and passes through it losing half of its kinetic energy. If it again strikes an identical plank and passes through it,the ratio of thermal energies produced in the plank is?
- Forces experienced by a wire? See picture
- A heavy bank vault door is opened by the application of #3.0*10^2# #N# directed perpendicular to the plane of the door at a distance of #0.80# #m# from the hinges. What is the torque?
- A bullet of mass 2 Kg is having a charge of 2mc. Through what potential difference must it be accelerated, starting from rest, to aquire a speed of 10m/s?
- A cinder block is sitting on a platform 20 m high it weigh 79 .N how much energy does it have?
- On what properties does the force of gravity between two objects depend?
- How far can a car drive when it has 100 gallons of fuel and is burning 2 gpm?
- What is the final angular speed of the barrel? -->
- If I'm in a car that starts out at #12# #m##/##sec# and accelerates at #4##m##/##sec^2# for #7# seconds, how fast will it be moving?
- How does one calculate cross products and dot products in Physics? Urgent help needed for an exam.
- Please solve this wave-optics based question?
- If a car goes a speed of 85 miles per hour, how far would it launch you if you didn't have your seatbelt on?
- How to solve the 31st question?
- Why radioactivity is a nuclear phenomena even there is change in electrons ? Example. Uranium with 92 electron changes to thorium with 90 electron
- Distance of a hydraulic lift is that a force applied to a small piston allows you to lift an object with a much greater than the applied force. However, the smaller piston must be pushed down a farther than the larger piston is raised. Why is this?
- How does inertia affect a person who is not wearing a seatbelt during a collision?
- A helium 5 decays into helium-4 and neutron. Helium-4 nucleus has a momentum = 1.903 06 × 10–20 N•s & kinetic energy of 2.723 50 × 10–14 J. Helium-4 mass has a mass of 6.64884x10-27 kg and the neutron is 1.67493 x 10-27 kg. What is the mass of helium-5?
- What materials are sensitive to surges of electrical energy?
- How to do 4th question?
- A solid sphere is rolling purely on a rough horizontal surface (coefficient of kinetic friction = #mu#) with speed of center #= u#. It collides inelastically with a smooth vertical wall at a certain moment. The coefficient of restitution being #1/2#?
- A closed-ended tube is 2.8 m long. What is the wavelength of a first harmonic standing wave?
- What is the frequency of the second harmonic sound wave in an open-ended tube that is 4.8 m long? The speed of sound in air is 340 m/s.
- A uniform rod of mass m and length l rotates in a horizontal plane with an angular velocity #omega# about a vertical axis passing through one end. The tension in the rod at a distance x from the axis is?
- Chayse is working on analyzing the electromagnetic spectrum, focusing on ultraviolet rays. He determines that a UV ray has a frequency of #1.53 xx 10^16" Hz"# and a wavelength of #1.96 xx 10^-8" m"#. Are his results reasonable? Explain your answer.
- What is the SI unit of electric charge?
- Two protons, each of charge #+1.60 * 10-19 C#, are #2.00 * 10-5 m# apart. What is the change in the electric potential energy of this pair of charges if they are brought #1.00 * 10-5 m# closer together?
- Find unit vector perpendicular to i-2j+2k and 3i+j-2k ?
- Four charges are brought from infinity and placed at one meter intervals as shown. Determine the electric potential energy of this group?
- The density of core of a planet is #rho_1# and that of outer shell is #rho_2#. The radius of core is R and that of planet is 2R. Gravitational field at outer surface of planet is same as at the surface of core what is the ratio #rho/rho_2#. ?
- What is the effect of friction on mass?
- Magnitude and angle made with larger force?
- Wires carrying AC current do not get heated up . Why ?
- How far will a driver go by maintaining a constant speed of 70 miles per hour and driving for 6 hours?
- A proton moving with a speed of vo = #3.0 * 10^4 m/s# is projected at an angle of 30o above a horizontal plane. If an electric field of 400 N/C is acting down, how long does it take the proton to return to the horizontal plane?
- Physics. Work Problem?
- What is the change in electrostatic potential energy if an electron is moved #20m# by a uniform electric field of magnitude #155 N/C#?
- Which diagram correctly demonstrates the various forces acting on a ball moving horizontally with some speed?
- How do you compare and contrast the way waves transmit energy and the way particles transmit energy?
- 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?
- A 20.0 kg rock is dropped and hits the ground at a speed of 90.0 m/s. What is the rock's gravitational potential energy before it was dropped?
- This is a question about steel bridge and I need to find the weight. Take a look at the picture. Thanks!?!
- A body initially at rest explodes into 2 pieces of mass 2M and 3M respectively having a total kinetic energy E. The kinetic energy of piece of mass 2M after the explosion is?
- What happens to the speed of sound as a medium cools?
- It takes 2 s for Juan to get the ball from a certain distance. If Juan travels at .5 m/s, how far is the ball from his initial position?
- An engine with 880 Nm of torque acts .85 m from a pivot point. What is the force produced?
- What are the types of network topologies?
- A parellel plate capacitor with plate speration d is charged with a battery so that energy stored is #"U"#. If a plate of dielectric #"K"# and thickness d is placed betweeen the plates of capacitor and battery remains connected. The work by battery is?
- The net force on a car is zero in both the horizontal and vertical directions. Which two situations could be true about the motion of the car?
- Charges of +2microC, +3microC and -8microC are placed in air at the vertices of an equilateral triangle of ide 10cm.What is the magnitude of the force acting on the -8microC due to the other two charges?
- A gas does 50 J of work as it expands adiabatically. Is the change in thermal energy of this gas 50 J, 0 J, or -50 J?
- Two stones are projected from the same point with same speed making angles 45°+x and 45°-x with the horizontal respectively. If x≤45° then the horizontal ratio of the two stones are in the ratio of?
- The sound level measured 30 m from a jet is 140 dB. What is the sound level at 300 m from the jet?
- Dolphins make soundsin air and water. What is the ratio of the wavelength of their sound in air to its wavelength in water? The speed sound in air is 343 m/s and in water is 1540 m/s.
- It is required to prepare a steel meter scale, such that the mm intervals are to be accurate within 0.0005mm at a certain temperature. Determine the max. temp. variation allowable during the rulings of mm marks? Given α for steel = 1.322 x 10-5 0C-1
- How can we prove that the work done to accelerate a body from rest to a velocity, V is given by W=1/2(mV^2)?
- For the travelling harmonic wave y(x,t) = 2cos2π(10t-0.008x + 0.35) where x and y are in cm and t is in s. The phase difference between oscillatory motion of two points separated by a distance of 0.5 m is ?
- Question is below, Find acceleration of slab in two cases?
- Two bodies are projected at angle theta and 90 minus theta to the horizontal with the same speed the ratio of their horizontal ranges are?
- Resistance?
- Equivalent resistance?
- See breeze and land breeze occurs at night. Why?
- What do you mean by power of lens?
- If it took a gardener 20. minutes (1200 s) to finish tilling his garden using 3500 W of power, how much work did he do?
- When equal amount of edible water and oil in 2 different beakers are heated with equal heat whose temperature will increase faster and why?
- When you hit a golf ball with a golf club, the club slows down slightly from the impact. How does this result illustrate the law of conservation of momentum?
- A certain FM transmitter broadcasts radio waves on 100MHz. What is the Calculation of the energy of a photon with this frequency?
- Why can a small object have the same kinetic energy as a large object if its velocity is large enough?
- The product of a rotating object's moment of inertia and its angular velocity is the object's what?
- A force of 64 N is applied to an 8 kg mass. What is the acceleration of the mass?
- What is the kinetic energy of an object that has a mass of 30 kilograms and moves with a velocity of 20 m/s?
- Shoudl the gravitational field strength (g) be smaller when you are at a higher altitude?
- From a height H, I shoot horizontally a ball(a) (mass M), while I drop another ball (b) with mass (2M). The initial speed of ball (a) is half of the max speed of ball(b). What is the ratio |Δp(a)|/|Δp(b)| over the whole time of motion?
- A circular loop wire with current I1=I∘π and a V shaped wire with current I2 are arranged in a plane as shown in diagram. If magnetic field at O is zero, value of I2 is ? (a)#([email protected])/35r# (b)#([email protected])/17r# (c)#([email protected])/r# (d)#([email protected])/35r#
- The greatest distance between Earth and the sun during Earth's revolution is 152 million kilometers. What is this distance in megameters?
- A 1.25 kg weight is hung from a vertical spring. The spring stretches by 3.75 cm from its original, unstretched length. How much mass should you hang from the spring so it will stretch by 8.13 cm?
- Rydberg gave the equation for all visible radiation in the hydrogen spectrum as #lambda = (kn^2)/(n^2-4)#. The value of k in terms of Rydberg constant is ? (1) 4R (2) R/4 (3) 4/R (4) R
- Two spacecraft in outer space attract each other with a force of 2N . What would the attractive force be if they were one-fourth as far apart?
- A ball is shot from cannnon into air with upward velocity of 40 ft/sec. The equation that gives the height(h) of the ball at any time id h(t)= -16t^2+40t+1.5. How many seconds rounded to the nearest hundreth will it take the ball to reach the ground?
- Why do projectiles with angle 45 make the biggest range?
- A 30-turn coil 8 cm in diameter is in a magnetic field of 0.1 T that is parallel to its axis. a) What is the magnetic flux through the coil? b) In how much time should the field drop to zero to induce an average emf of 0.7 V in the coil? Thank you.
- What is the purpose of a capacitor in a mobile phone?
- What is the Rover's landing speed? (Picture)
- Why is the impedance LCR circuit capacitive at a frequency lower than resonant frequency?
- How fast is a wave if its frequency is 744.5 Hz and it has a wavelength of 163.1 m?
- A guitar string is 4.6 m long. What is the wavelength of a fourth harmonic standing wave?
- What is the wavelength of a sound wave moving at 340 m/s with a frequency of 306 Hz?
- A circular loop wire with current #I_1 = [email protected]/pi# and a V shaped wire with current #I_2# are arranged in a plane as shown in diagram. If magnetic field at O is zero, value of #I_2# is ? (a)#[email protected]/35r# (b)#[email protected]/17r# (c)#[email protected]/r# (d)#[email protected]/35r#
- objects A,B,C with masses m,2 m,and m are kept on a friction less horizontal surface. The object A move towards B with a speed of 9 m/s and makes an elastic collision with it . B makes completely inelastic collision with C. Then velocity of C is?
- Two bodies are projected at angle theta and 90 minus theta to the horizontal with the same speed the ratio of their maximum vertical height is?
- A car drives at a constant speed of 3 m/s around a circle with radius 20 m. What is the centripetal acceleration of the car?
- An object 5.0 cm high is placed 2.0 cm from a converging (convex) lens which is being used as a magnifying glass. The image produced is 6.0 cm from the lens and is 15 cm high.What is the focal length of the lens?
- What is a physical quantity that has magnitude but no direction?
- Can we consider the wavelength of a transverse wave is twice the distance between alternate crest and trough?
- A rectangular glass block of dimensions 30 cm by 5 cm by 10 cm weight 37.5 N calculate the least and greatest pressure it can exert when resting on a horizontal table. Can anybody help me with this?
- The electric field in a particular area is given by the following function. #vecE=4.4N/Cxi#, which means it gets bigger with increasing x values. Find the potential difference between points A #(x=0,y=+2)# and B #(x=3,y=0)?#
- Two litres of an ideal gas at a pressure of 10 atm expands isothermally into a vacuum until total volume is 10 litres. How much heat is absorbed and how much work is done in expansion?
- Physics Question?
- Help please?!!!thanks
- A 345kg piano is lifted 15.0m to the second story of a building. If a crane can do the work in 32.0 s, how much power does the crane exert?
- Two forces #F_1# and #F_2# are applied on a spool of mass M and moment of inertia I about an axis passing through its center of mass. Find the ratio #F_1/F_2#, so that the force of friction is zero. Given that #I<2MR^2#?
- The topmost and bottommost velocities of a disk are #v_2# and #v_2# in the same direction. The radius is R. Find the angular velocity #omega#?
- Where the electric field is zero?
- Mcq question Inside water an air bubble behaves like ?? A. Always like a flat plate B. Always like a concave lens C. Always like a convex lens D. Always like a concave mirror
- When you push down on a confined fluid you create pressure in what direction does the pressure act?
- Cross product of #(2 hat i + 3 hat j) xx (5 hat i + hat j)# ?
- Which of the following quantities measured from different inertial reference frames are same?
- How do you linearise the period of a pendulum formula?
- What is the charge on the particle given a #50xx10^-6# kg particle is released from rest in a region with a constant electric field of strength #"3000 N/C"#. If the particle is observed to accelerate at a rate of #"22 m/s"^2#?
- Physics Question?
- Can someone explain how do find the components of #vecD#?
- The Moon orbits the Earth every #27.3# days. Determine the angular velocity in degrees. Help?
- A projectile is shot at an angle of #pi/12 # and a velocity of #1 m/s#. How far away will the projectile land?
- A car traveling with constant speed travels 150 km in 7200 s. What is the speed of the car?
- Nancy throws a ball toward a basket 3.2 m off the ground. The rule associated with the ball's trajectory is #y = -.4(x-6)^2 + 3.6#. Nancy throws the ball at a distance of 3 m from the basket. From what height did Nancy throw the ball?
- Explain with a sketch: a.Why the bottom of a glass filled with water appears closer?
- The absolute refractive index....?
- A guitar string is 6.7 m long. What is the wavelength of a third harmonic standing wave?
- A guitar string is 5.4 meters long. What is the wavelength of a second harmonic standing wave?
- You are riding on your bike and stop pedaling, coasting along the road. Eventually, your bike slows down and stops. What happened to the energy of your motion when your bike stopped?
- A hand pump is being used to inflate a bicycle tire that has a gauge pressure of 40.0 psi. If the pump is a cylinder of length 18.0 in. with a cross-sectional area of 3.00 in2 . , how far down must the piston be pushed before air will flow into the tire?
- Help please .? The picture in the details
- A hand pump is being used to inflate a bicycle tire that has a gauge pressure of 40.0 psi. If the pump is a cylinder of length 18.0 in. with a cross-sectional area of 3.00 in2. , how far down must the piston be pushed before air will flow into the tire?
- A potato launcher uses a spring that can apply a force of 20 newtons to potatoes. What is the acceleration of the 100-gram potato?
- A #1.18# #kg# book in space has a weight of #8.34# #N#. What is the value of the gravitational field at that location, in #N#/#kg#?
- a) What is the acceleration of the blocks? b) What is the net force on each block? c) What is the tension in the string?
- A light wave enter a glass boundary at angle x if the reflected wave is complete plain polarised, find the value of x given that the refractive index of the glass is 1.33?
- Can anyone explain the working please?!!
- When 53000000J of heat is added to a gas enclosed in a cylinder fitted with a light friction less piston maintained at atmospheric pressure,the volume is observed to increase from 1.9m^3 to 4.1 m^3.What is the change in internal energy of the gas?
- What volume of water at 0°C can a freezer make into ice cubes in 1.0 hour,if the coefficient of performance of the cooling unit is 7.0 and the power input is 1.0 kilowatt?
- A golf ball at rest is dropped from the top of a building. What is the velocity of the ball after 3 s?
- An ideal refrigerator-freezer operates with COP = 7.0 in a 24°C room.What is the temperature inside the freezer?
- A pulley is atttached to the ceiling of a lift moving upward. Two particles are attached to the two ends of a string passing over the pulley. The masses of the particles are in the ratio 2:1. If the acceleration of the particles is g/2 then acc of lift?
- A particle starts to move in a circle of radius 1 m with an angular acceleration 1 rad/s^2. If the mass of the particle is 2 kg and it started from rest and moved on a horizontal surface, what is the total force acting on it at t=2 seconds?
- In a curling match, a player slides a stone across the ice. If the coefficient of friction between the stone and the ice is 0.05, what initial speed should he give to the stone if it is to stop exactly 50 m away?
- What is time ?
- Car accelerates from rest under constant tractive force of 100N. After travelling 300m engine stalls and car slows down to a stop, without applying brakes. Throughout the motion there is a constant resistance of 30N, what is the distance travelled?
- Free fall is a state in which an object falls freely with uniform velocity towards the direction of gravity.Is this defination true?
- 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?
- What is the magnitude of the minimum force needed to start the rubber block moving across the dry asphalt?
- What is the problem with focus when someone is nearsighted? Farsighted? Which type of lens would correct each problem, concave or convex?
- What is the accelerations of the objects? What is the tension of the string? What is the speed of each object 1.00 sec ?
- SNELLS LAW: light travels from water into fibre optic cable with an angle of refraction of 21.5° what is the angle of incidence?
- Minimum frictional force when F=0??
- Two small positively charged spheres have a combined charge of 5.0 * 10^-5 c. if each sphere is repelled from the other by an electrostatic force of 1.0 N when the spheres are 2.0 m apart, what is the charge on each sphere?
- Please explain how you got the answer as well. ?
- Question is given below ?
- Electric charge?
- How do you calculate the total resistance in a parallel circuit?
- A body is in contact with the vertical front part of the truck. The coefficient of friction between the body and the truck is #mu# . The minimum acceleration with which the truck should travel so that the body does not fall down is ?
- Answer this question and make me understand what is meant by vertical and horizontal ?
- A car travels 65 km in 1 hour. What is its average speed in meters per second?
- The electron in a hydrogen atom orbits a stationary proton at a distance of 5.3*10^-11 m at a speed of 2.2*10^6 m/s. What is (a) the period (b) the force on the electron?
- Please solve q 102?
- What is the landing point?
- Calculate the work done by the system in an irreversible (single step) adiabatic expansion of 2 mole of a polyatomic gas (#gamma#= 4/3) from 300 K and pressure 10 atm to 1 atm : ? (a) -227 R (b) -205 R (c) -405 R (d) None of these
- Does friction decrease when speed of a moving object increases? Please explain me in simple terms. I'm a 8 grade student.
- A cow is tied to the base of a pole with a 10m long rope tight.find the area of the ground swept by the rope in one complete rotation of the cow ?
- A ball is dropped from the top of a building. The expression #4.9x^2# gives the distance in meters the ball has fallen after #x# seconds. What is the expression that gives the distance in meters the ball has fallen after # x^2# seconds?
- A stationary mass sudddenly explodes into two fragments, one heavy and another light. Which one has greater kinetic energy and why?
- How do you work out the total translational kinetic energy of N2 gas?
- Pascal's Law involves the use of the word - "enclosed fluid".......so how can we apply Pascal's Law in the case of atmospheric pressure?
- Whose work is credited with being the beginning of modern atomic theory?
- When white light goes through the prism, it splits into a spectrum. Why red rays refract less and purple rays most of all?
- After a hot shower and dishwashing, there is "no hot water" left in the 50-gal (185 L) water heater. This suggests that the tank has emptied and refilled with water at roughly 10°C a) how much energy needed to reheat the water to 50°C?
- If the velocity changes from 10 m/s to 12 m/s in one second, what is the acceleration?
- A television set draws an rms current of 2.50 A from a 60 Hz power line. What is the average current, the average of the square of the current, and the amplitude of the current?
- Help please with steps ?
- Explain please with details ?
- Explain please with details ?
- Help please?
- Help please with details?
- The magnification is more than unity when object is placed at a distance d from a convex lens. Its focal length is 20 cm. What is the value of d? Options: a. Greater than 20 cm b. Less than 20 cm c. 40 cm d. Greater than 20 cm and less than 40 cm
- Can you answer this question?
- A Man Standing On A road has to hold his umbrella at 30 deg with the vertical to keep the rain away he throws the umbrella and starts running at 10 km/hr then he finds that raindrop are hitting his head vertically than speed of raindrop wrt moving man is?
- A brand new motorcycle goes from 0 to 60 mi/hr in 3 seconds. What is its acceleration?
- A 23.4kg solid aluminum cylindrical wheel of radius 0.41 m is rotating about its axle on frictionless bearings with angular velocity ω = 32.8 rad/s. If its temperature is now raised from 20.0oC to 75.0oC, what is the fractional change in ω?
- A body is released from the top of an inclined plane of inclination theta. It reaches the bottom with velocity V. If keeping the length same the angle of the inclination is doubled what will be the velocity of the body and reaching the ground?
- When catching cricket ball, we pull our hands back. why?
- At which point along the x axis will #q_2# experience no net force given #d=2 m# and relation between charges 1 and 3 is #3q_1=q_3#?
- Can you answer this question?
- If a ring of iron is heated then what happens of the hole of the ring?
- When the time interval between seeing the lightening and hearing the thunder is short, the thounder is loud. Why?
- Jane slowly paddles her canoe across a calm lake. Explain what makes the boat moves forward. What principle best explains this situation?
- Help? Kinematics: Projectile motion
- How a pure intrinsic semiconductor can be transformed into n-type and p-type semiconductor?
- A truck driving along a highway road and has a large quantity of momentum. A car with half the mass but twice the speed would have?
- A long, narrow steel rod of length 2.5000 m at 25°C is oscillating as a pendulum about a horizontal axis through one end. If the temperature changes to 0°C, what will be the fractional change in its period?
- A worker does 25 J of work lifting a bucket, then sets the bucket back down in the same place. What is the total net work done on the bucket?
- A train leaves a station and travels north at a speed of 45 mph. Two hours later, a second train leaves on a parallel track and travels north at 75 mph. How far from the station will they meet?
- A tourist accidentally drops a camera from a 40.0 m high bridge. What is the speed of the camera as it hits the water?
- Suppose a student calculated the efficiency of a machine to be 110% could this answer be correct? which law of physics is violate?
- What does this distance-time graph shows?
- Slope of Force-position curve of a particle undergoing S.H.M is -4,find the mass of the particle if it has a time period of 0.2s ?
- A boy of height 1.5m stand before a plane mirror of length 0.7m and lower edge of the mirror above the floor is 0.8m then the boy can see his full image or the the boy can't see his hair or the boy can't see his feet? pls tell me immediately and thanku
- A) How do I measure resistance with an ammeter? B) How do I measure resistance with a voltmeter? (For both, Off Limits: you can’t use an ohmmeter) Can anybody explain with drawing schematics.
- What is the difference between a graph of linear motion and a graph of harmonic motion?
- When doing UNIVERSAL GRAVITATION questions, is d = the radius of the object or d = the distance between both objects? How can you tell??
- 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 950 kg car travels at a constant speed of 35 m/s. If 350 N of friction acts on the car, what is the applied force provided by the engine?
- An EMF 220 volt is applied to a circuit containing register a having resistance 160ohm, and capacitor in series. the current is found to lead voltage by an angle theta = tan^-1(3/4). Calculate Capacitive reactance, impedence, current flow in circuit?
- Draw a Force time graph of the particle undergoing SHM with a displacement time graph as follows,(add reasons as well)?
- A 0.60-kg block initially at rest on a frictionless horizontal surface is acted upon by a force of 4.0 N for a distance of 6.5 m. How much kinetic energy does the block gain?
- When a force is exerted on an object, work is done only if the object .........? CHOICES IN THE DETAILS
- What is the correct answer to 39th question and why?
- What is the energy required to launch an m kg satellite from earth's surface in a circular orbit at an altitude of 2R? (R=radius of the earth)
- Sphere A, has Q units of charge. If we take some little bit of charge q off of sphere A, and put it on sphere B. What should the ratio q/Q be if we want the electrostatic force between the spheres to be a maximum?
- A plane is traveling 200 m/s in one direction. Meanwhile, another plane is traveling the opposite direction at 550 m/s. How long will it take for the planes to travel the same distance of 7600 m?
- A spring with a spring constant of 144 N/m is compressed by a distance of 16.5 cm. How much elastic potential energy is stored in the spring?
- Find an expression for the displacement?
- If the net force on an object is zero, can the object be moving?
- A river is flowing at #3ms^-1# due east. A speedboat, whose speed in still water is #5ms^-1#, is steered in the direction on a bearing of #330^o#. Find the resultant velocity of the speedboat?
- A particle undergoing S.H.M having its velocity (#v#) and displacement from mean position (#x#) relation plotted as a circle of equation #v^2 + x^2 =3# Find,its angular velocity?
- A train rolls to a stop along a horizontal track without the conductor applying the brakes. What is the reason this happens?
- If one station broadcasts at 90.5 MHz and another one at 107.1 MHz which stations signal has waves with longer wavelengths?
- This was a question from Pradeep book for Class 11 Physics. Is the question incomplete and requires more information? If no, please give me a solution. Thanks!
- A mass of 1 kg is thrown up with velocity of 100 m/s. After 5 second it explodes into 2 parts. One part of mass 400 g move down with a velocity 25 m/s. Calculate the velocity of other part just after explosion?? (g=10 m/s²)
- A beam of light has a wavelength of 4.5 x 10−7 meter in a vacuum. The frequency of this light is ___? (Speed of light is 3 X 108 m/s)
- Reflection of light?
- 1. Show that (x) = Asin(kx) satisfies the time-independent Schrödinger equation when E and V are independent of x?
- Two particles #X# and # Y# having equal charges, after being accelerated through the same potential difference, enter a region of uniform magnetic field and describe circular path of radius #R_1#, and #R_2# respectively. What is #X/Y#?
- What is a agonimeter?
- Please solve it?
- Please solve it?
- The wavelength of a photon is 10A find its energy? 2
- When a ball drops from the roof of a building, it speeds up as it falls. What energy transformation is happening?
- What is the centripetal force acting on a 925 kg car as it rounds an unbanked curve with a radius of 75 m at a speed of 22 m/s?
- How long would it take to travel 90 mi at 45 mi/h?
- What is the energy of visible light?
- How many POWER formulas are possible and what they are......?
- If A=3i+2j+3k and B=i-j+2k then what is angel between them?
- What did Sir Isaac Newton contribute to science?
- 2 reasons why it takes long for the outer planets to orbit around the sun?
- Why would a car want to reduce its fluid friction?
- Does the mass of an object increases impact?
- What is the distance between two students (their radius) if they each weigh 110kg and 48kg and the force of attraction between them was 8.44 x 10^-7 N?
- How to do this?
- The length if an arc traversed by minute hand of a watch 1 cm long after 15 minute as?
- How do interference happen ?
- How does a 'cheater bar' added to the end of a wrench, create more torque?
- What are some ways friction can be reduced?
- Question on the image?
- What is fusion reaction and what are its products? Briefly explain.
- Image formed by convex mirror?
- A ball is thrown horizontally from a table at a speed of 2ms^-1. The ball falls for 3 seconds.{Acceleration due to gravity, g= 10ms^-1 ?
- A car with speed #v = "20 ms"^(-1)# passes a stopped police car. Right at this point, the car accelerates at #"2 ms"^-2# and the police car at #2a#. Show that, when the police car catches up to the other car, the distance is #d=(4v^2)/a#?
- How do you solve for L in T = 2 π √ L g ?
- Question is given below ? -
- How do you solve for #g# in #T = 2pi sqrt(L/g)#?
- Calculate the ratio of the drag force on a jet flying ?
- Determine the relation between the accelerations? Please provide your steps for finding the answer?
- The optical phenomenon responsible for rainbow is?
- What is the force, in terms of Coulomb's constant, between two electrical charges of #24 C# and #7 C# that are #2 m # apart?
- How much work is done when a load is moved 3ft by a 20 lb force?
- How do you linearise the radioactive decay function properly?
- The filament temperature of a light bulb is 2 000 K when the bulb delivers 40 W of power. If its emissivity remains constant, what power is delivered when the filament temperature is 2 500 K?
- How will increasing the frequency of the wave affect the wavelength & what type of relationship is this?
- During each cycle of operation a refrigerator absorbs 55 cal from the freezer compartment and expels 85 cal to the room. If one cycle occurs every 10 s, how many minutes will it take to freeze 500 g of water, initially at 0°C? (Lv = 80 cal/g)
- If the ring is initially at 99 degrees Celsius, what mass of water at 25 degrees Celsius is needed to lower the ring’s temperature to 38 degrees Celsius?
- Two masses, each of mass #3 kg# are being held #7# meters apart on a table (neglect friction). They each have #100# microcoulomb of excess negative charge, what will the initial acceleration of each one be when they are let go?
- In what direction should you swim across a river if you want to minimize the time spent in the water?
- What is the magnitude of the velocity of a 25-kilogram object that has a momentum of 100 kilogram meters per second?
- If one wave of 10 m amplitude meets constructively with another of amplitude 20 m, what is the new amplitude?
- A ladybug takes of with a force of 0.012 N for a distance of 6 cm. What is the work done by the ladybug during take-off?
- Why does a bimetallic strip bend with changes in temperature?
- If I have a glass of filled with 300 grams of water at 25 *C then how much ice do I need to add for it to reach a temperature of 5 *C?
- If you exert a force of 700 N to walk 6 m up a flight of stairs in 6 s, how much power do you use?
- Please solve this conservation of energy problem?
- Suppose a young boy pushes a supermarket cart with a mass of #30# #kg#. How much force does he use if the cart accelerates at #3.5# #m##/s^2#?
- Ball with mass .5kg is released from rest at point A, 5m above the bottom of the tank, it falls through the tank of oil and at point B it is 2m above the bottom with speed of 4m/s. What is the work done by Force of friction between A and B?
- Please help?
- What is is the Mechanism of ITER?
- Slider block A moves to the left with a constant velocity of #6m/s#. Determine?
- A batter hits a baseball so that it leaves the bat with an initial speed 37 m/s at an angle of 53.what will be the position of the ball and the magnitude and direction of its velocity after 2 seconds?Treat the baseball as a projectile.
- How should the diameter of the wire used be chosen so to minimize the heat dissipated in windings ? Check the details in question.
- A)Calculate the initial momentum of the ball? b)Calculate the time taken for the ball to reach a maximum height? c) The boy catches the ball. Construct a sketch of a velocity-time graph to illustrate the motion of the ball.
- A remote-control car has a mass of #1.5# #kg#. Its electric motor accelerates the car at #6# #m##/##s^2#. What force does the motor provide?
- Why it is said that propogation of sound waves is an adiabatic process?
- Proof for maximum height of projection equal to ¼ of its range?
- A sound wave with a frequency of 320 hz travels through air with a velocity of 300 m/s . Calculate the wavelength of the sound wave?
- A biker rides 35 miles for 5.5 hours. What is the speed of the biker?
- If a small machine does 2,500 joules of work on an object to move it a distance of 100 meters in 10 seconds , what is the force needed to do the work? What is the power of the machine doing the work?
- A radio station transmits electromagnetic waves of frequency 40MHz. If the speed of these waves is 3 into 10 raised to the power 8 metres per second, what is the wavelength of these waves ?
- Why do gases have high potential energy?
- When the distance between two interacting objects becomes one third, the gravitational force becomes 9 times. Why 1/3 and gravitational force becomes 9 times?
- A wave of period #5.0# #ms# travels through a medium. The graph shows the variation with distance #d# of the displacement #x# of points in the medium. What is the average speed of a point in the medium during one full oscillation?
- Why does the period of a pendulum depend on length and free-fall acceleration?
- A 2.3 kg steel ball strikes a wall with a speed of 8.5 m/s at an angle of 64⁰ with the surface. It bounces off with the same speed and angle. If the ball is in contact with the wall for 0.448 s. What is the average force exerted by the ball?
- How do I find the distance #r# separating the spheres given the following...?
- If an object at rest on Earth has a mass of 20kg, what is the normal force equal to?
- A puddle holds 150 g of water. If 0.50 g of water evaporates from the surface, what is the approximate temperature change of the remaining water? (Lv = 2259 × 10^3 J/kg)
- A scooterist goes to a place of 20km/hr and return at a speed of 30mm/hr. Find the average speed in km/hr for the entire ?
- When a stopwatch reads t = 0.00 h , car A is at d ( a ) =48.0km moving at a consant 36.0 k m/ h . Later, when the watch reads t = 1.50 h , car B is at d ( b ) = 0.00 k m moving at 48.0 k m/ h . Create a position-time graph and algebraic equation?
- How does friction affect an object's motion?
- A 1130 kg is held in a place by a light cable on a smooth frictionless surface makes an angle of 31 degrees above the surface of the ramp and the ramp rises itself at 25 degrees above the horizontal.what is the tension in the cable?
- Why is kinetic friction always less than limiting friction?
- You do work when you push a heavy object even if the object does not move?
- Can you help me with this question?
- A body is projected with a velocity #10m/s# at an inclination #45^o# to the horizontal. The minimum radius of curvature of the trajectory described by the particle is?
- Boxes A and B are in a horizontal frictionless. Box A has mass 20 kg and box B has mass 5kg.A horizontal force of 100N is exerted on box A. What is the magnitude of the force that box A exerts on box B?
- If a charged particle enters into a uniform magnetic field neither perpendicularly nor parallel to the field. What is the path of the charged particle? A)Straight line B)Elliptical C)Helical D)Parabola
- A charged particle moves through a magnetic field perpendicular to its direction , then discuss about the kinetic energy and momentum of the particle whether they remain constant or change?
- If one person pushed on a piano with a force of 50 N east and another person pushed on the same piano with a force of 25 N west, what would be the net force on the piano?
- How do we calculate value of frictional force given the mass and constant velocity?
- Why do dry surface have high friction than wet surface?
- What is the speed of the car when it passes the truck?
- A 50.0 g sample of copper is at 25.0°C. If l 200 I of energy is added to it by heat, what is the final temperature of the copper?
- Conventional current flows in the direction of applied field or against the field ?Do conventional current means proton flow?
- What is a wavefunction?
- 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?
- Explain General Theory of Relativity please ?
- why is an image clear in a shiny spoon but fuzzy in a tarnished spoon?
- Find the heat required for 5-kg water to be heated from 30 Celsius degree to 50 Celsius degree. Can you express the temperature of 50 Celsius degree in Fahrenheit scale?
- A 20-kg boy runs at 4 m/s and jumps on a rest 5-kg skateboard. (1) Find the skating velocity. (2) Which law do you apply to solve this problem?
- A sphere with radius of 2 m is entirely immersed in water. (1) what is the buoyant force on the sphere by water? (2) what is the buoyant force by the air?(Given water and air densities to be is 1000 kg/m3 and 1.3 kg/m3, respectively)
- A lifter takes 5 s to lift a 20-kg object by 10 m high. (1) What is the work done against gravity? (2) What is the power of the lifter?
- A particle of mass #m# moving with speed #v# hits elastically another stationary particle of mass #2m# inside a smooth horizontal circular tube of radius #r#. The time after which the second collision will happen?
- A 2000-kg car is moving at 10 m/s. (1) What is the car kinetic energy? (2) What is the car linear momentum?
- Suppose a rock is dropped off a cliff with an initial speed of 0 m/s. What is the rock's speed after 3 seconds, in m/s, if it encounters no air resistance?
- How freefall is possible on moon ?
- The mouthpiece of a phone converts sound waves to what energy?
- In a given circuit, the supplied voltage is 1.5 volts. One resistor is 3 ohms and the other is 2 ohms. What is the current in the circuit?
- Whenever you move your body you are doing work?
- What is the relative error in the effective resistance in a parallel combination?#R_effective=frac{R_1xxR_2}(R_1+R_2)#.So what will #Delta(R)//R# be?
- A diver springs upward with an initial speed of 1.6 m/s from a 4.5-m board. ?
- Calculate activity of a radioactive substance after 3 hours ?
- A train goes forward at a speed of 1 m/s for 20 seconds. Then it stops and goes backward at a speed of 0.5m/s for 4 seconds. After both movements are completed how far is the train located from its starting point?
- An object is released from rest on a planet that has no atmosphere. The object falls freely for 3.06 m in the first second. What is the magnitude of the acceleration due to gravity on the planet?
- 4 resistors are in Parallel. They are 45LaTeX: \Omega Ω , 18LaTeX: \Omega Ω , 43LaTeX: \Omega Ω and 19LaTeX: \Omega Ω . Calculate the total resistance of the circuit? You Answered
- A parallel circuit is built that has 3 resistors. The first resistor has 6A of current, the second has 6A and the third has 4A of current. The first resistor has a resistance of 9LaTeX: \Omega Ω . Calculate the resistance of the second resistor?
- When a 65 kg skydiver jumps from a plane, her speed steadily increases until increases air resistance provides a force that balances the force due to free fall. How fast is the skydiver falling if her kinetic energy at the moment is 704,000 J?
- An AC voltage source, with a peak output of 120 V, results in dissipation of energy in a resistor at rate of 100 W. What is the value of the resistance?
- 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.?
- Find the equivalent resistance between point A and B?
- A particle is moving on a linear pathway whose acceleration varies as #a=2x#(where, x is its distance covered) If it had started from rest(zero velocity when x=0),find an equation to suggest its velocity-displacement relationship? How to solve? Pls help
- Why might windows begin to rattle when an airplane flies overhead?
- A positron under goes a displacement r=2i-3j+6k ending with the positron vectors r=3j-4k in meters.what was the positron initial positron vectors?
- The angle of projection for which maximum height is equal to the range covered will be? a)76 deg. b)tan-4. c)both
- How to find horizontal distance in projectile motion?
- Is tracing paper a transparent object or translucent object?
- Heather and Matthew walk with an average velocity of 0.98 m/s eastward. If it takes them 34 min to walk to the store, what is their displacement?
- A platinum resistance thermometer has resistance 2.2 Ω at 0°C and 5.6 Ω at 100°C. If its resistance is 7.3 Ω in a bath, find the temperature of the bath on the platinum resistance thermometer?
- Why does this happen - when a football is kicked, its volume decreases?
- What does a maglev train use to reduce friction?
- How do I find the velocity of a fallen object given the height and seconds it took for the object to hit the ground?
- What is the equation that Newton's second law gives us?
- A car drives at a constant speed of 14 m/s around a circle with radius 55 m. What is the centripetal acceleration of the car?
- How much force is needed to accelerate a #68# kilogram-skier at a rate of #1.2# #m##/sec^2#?
- -what is the magnitude of tension in the rope? -find the horizontal and vertical components of the force exerted at A on the lamina by the wall.
- A projectile is launched from ground at angle theta and speed v0 into a headwind that causes a constant horizontal acceleration, opposite the motion's direction.Find an expression in terms of a and g for the launched angle that gives the maximum range?
- What is the force, in terms of Coulomb's constant, between two electrical charges of #-5 C# and #-7 C# that are #3 m # apart?
- What does the #E# represent in Einstein's equation, #E=mc^2#?
- Consider a toy car on a track. Say the track is not leveled and we attempt to level the track such that #theta=0# (See image). In an ideal physics set up, even a very small angle should create an acceleration. So, why does the car still not move?
- How can you convert a galvanometer into a voltmeter?
- Johnny walks 4 meters east, stops and then walks 6 meters west. It took Johnny 10 seconds to walk this path. What is his total distance traveled?
- What is the force, in terms of Coulomb's constant, between two electrical charges of #6 C# and #2 C# that are #2 m # apart?
- A 2.0 kg softball is pitched to you at 20 m/s. You hit the ball back along the same path, and at the same speed. If the bat was in contact with the ball for 0.10 s, what is the average force the bat exerted?
- Using the “Tip to tail rule”, rearrange the following combinations of vectors a and draw in (and label) the resultant, R? THE PICTURE IN THE DETAILS
- A Man throws a ball towards a wall which is 74m away.After the ball hitting the wall he runs towards the wall and hears sound after0.2s.The temperature was 30c.what was the velocity of man?
- A ball moving with velocity 20 m/s hit a wall vertically and followed the same path.If in this process its velocity becomes 20% of the previous value,find the coefficient of restitution?? Assume no effect of gravity on this horizontal motion
- A gas balloon has a volume of 106.0 liters when the temperature is 45.0C and the pressure is 740.0 mmHg. What will its volume be at 20.0C and 780.0mmHg pressure?
- Why machine do not have 100% efficiency ? ?
- The diode that converts light energy into electrical energy is called photodiode or solar cell?
- Find the reading of the spring balance shown in fig. The elevator is going up with an acceleration g/10, the pulley and the string are light and the pulley is smooth?( The mass of the blocks are 1.5 Kg and 3.5 Kg)
- A 41 kg rock accidentally breaks loose from the edge of a cliff and falls straight down. The magnitude of the air resistance that opposes its downward motion is 260 N. How much air resistance would cause the rock to fall at a constant speed?
- An airplane took 4 hours to fly 3600 miles against a headwind. The return trip with the wind took 3hours. Find the speed of the plane in still air and the speed of the wind?
- A ball is thrown horizontally from the roof of a building 75 m tall with a speed of 4.6 m/s. How much later does the ball hit the ground?
- If the total energy of the particle executing shm is e and amplitude a if the mass is m.find the new total energy if a new massm is attached to the particle at its extreme?
- A meatball is launched off the table horizontally at 3.2 m/s. What is its vertical and horizontal speed after 3.2 seconds?
- Magnetic field=?
- Can an object be increasing in speed but decreasing in acceleration? An example please.
- What happens when a second bulb is added to a circuit,do the bulbs glow dimmer?
- To check whether a body is charged or not, which of the following will you use? a) a positively charged body b) a negatively charged body c) an uncharged body d) none
- Can anyone explain why simple harmonic motion is defined by acceleration being proportional to the negative displacement?
- Can object have a varying speed if its velocity is constant? Can it have varying velocity if its speed is constant? If yes, give examples in each case.
- Please solve this electromegnetic induction question?
- Physics Magnetism?
- How to convert 2.5 KJ/mol into Calorie?
- A stone is projected from the top tower at an angle of 30 degrees to the horizontal with a velocity of 40m/s. It reaches the ground in 5 seconds. What is the height of the tower and the range of the stone using?
- If the torque needed to loosen a bolt is 40.0 Nm, what must be the minimum force exerted on a .30 m wrench to loosen the bolt?
- What is the displacement of saeed if he begins at HCT, runs for 10 km to carrefour and then returns back to HCT? What is the total distance ?
- Find the Mass of each of these weights? A. 98N B.80N C. 0.98N
- How to determine the direction of a particle between two plates?
- A mass launched at 30 degrees to horizontal within initial speed 25m/s what is the maximum height obtained and after what time does the mass move a horizontal distance of 3m?
- What is light? How fast does light travel?
- Question is given below?
- What is the frequency of a sound wave that has a wavelength of 0.0025?
- The turn ratios of a transformer is 10.what will be it's mean???
- A projectile launcher is set on a table so that the ball becomes a projectile at a height of 1.2 m above the floor. The mass of the ball is 0.01 kg. A plunger is used to push the ball into the barrel of the launcher compressing a spring a distance of...?
- In a garden a boy is swinging in the standing position how will the time period of the swing be affected if the boy sites down on the swing?
- Please answer this question?
- Can I solved this problem by using conservation of energy ?
- How do i even solve this buoyancy question?
- A ball is dropped from rest from a height of 20.0 m. One second later a second ball is thrown vertically downwards. The two balls arrive on the ground at the same time. What is the initial velocity of the second ball?
- 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 effect in kinetis energy and momentum when mass of a body in a projectile motion is halved?
- In the arrangement the coefficient of friction between the 2 blocks is#mu=1//2#What is the force of friction acting between the 2 blocks?
- Question (1.1): Three objects are brought close to each other, two at a time. When objects A and B are brought together, they repel. When objects B and C are brought together, they also repel. Which of the following are true? (a) Objects A and C possess c
- An airplane is flying horizontally at a constant speed. It drops a package out of doors below the plane, and continues to fly at the same constant speed. When the package hits the ground, where the airplane be? Air resistance is negligible.
- As cold air descends, it warms up and then rises. Why?
- Marcus Aurelius runs and jumps off a table horizontally from a height of 2m with a speed of 7.5 m/s. How far will he travel before he reaches the ground?
- A 2500 sample of np-239 decays for 30 days. what mass will remain radioactive?
- What is the force, in terms of Coulomb's constant, between two electrical charges of #16 C# and #3 C# that are #2 m # apart?
- An airplane is heading north at an airspeed of 700 km/hr, but there is a wind blowing from the northeast at 40 km/hr. The plane will end up flying ______(?)degrees off course. The plane's speed relative to the ground will be _____(?)km/hr.
- What is time?
- Please answer this physics answer?
- What kind of energy changes take place when you dive off a diving board?
- If a book weighing 10 N is sitting on a table, what is the magnitude of the support force?
- What is the difference between real and virtual image?
- Projectile launcher problem?
- An inclined plane is 5.00 m long and 2.00 m high. What is the ideal mechanical advantage of this machine?
- A particle of mass m1 makes an elastic head on collision with a stationary particle of mass m2. the fraction of kinectic energy of m1 carried by m2?
- How much energy is required to excite an electron in the ground state in a hydrogen atom to the third excited state? How much more energy would it take to ionise the atom ?
- How could you produce a transverse wave in a spring?
- A ball is rolling down a hill at #+2.0# #m##/##s#. The ball is uniformly accelerating at #+4.0# #m##/##s^2#. What will the ball's velocity be #3.0# #s# later?
- What is the difference between Thrust and Force?
- Find the length of an antenna operating at 500 kHz, if the antenna is one-fourth of the wavelength?
- A paricle of mass 1 kg is executing shm with an amplitude of 1m and time period π s. The kinetic energy of the particle at the movement when the displacement is 0.8m from the mean position is?
- How much voltage is required to run 1.6 A of current through a 240 resistor? Use V = IR.
- An amount Q of heat is added to a mono atomic ideal gas in a process in which the gas performs a work Q/2 on its surrounding .find equation of the process?
- Please help with Physical Science?
- Consider a box sliding down an incline of #45˚# . It takes the block #36.4# cm to increase it's speed from rest to 2 m/s. What is the coefficient of kinetic friction?
- Answer this MCQ...?
- What is the frequency in hertz of blue light having a wavelength of 425 nm?
- Question #082dc
- A sprinter set a high school record in track and field, running 200.0 m in 21.3 s. What is the average speed of the sprinter in kilometers per hour?
- A man runs with a speed of 6m/s off a platform that is 10 m above the water. How fast is he moving when he hits the water?
- How do electricity move?
- A vertical rod A of mass m rests on the inclined surface of a wedge B of mass M?
- Question #2a59b
- Question #11841
- What is the rate of acceleration of a 2,000 kilogram truck if a force of 4,200 N is used to make it start moving forward?
- Question #585d4
- Why do the energy levels in an atom have negative energy values?
- Light from a star travels to Earth in a straight line at a constant speed of almost 300,000 km/s. What is the acceleration of the light?
- Question #5d526
- A car is driving east for a distance of 50km, then north for 30km and then in a direction 30 east of north for 25km. Determine the angle of the car's total displacement from its starting point?
- By what factor would your weight change if Earth's diameter were tripled and its mass were tripled?
- Question #d7452
- Is the acceleration due to gravity in projectile motion always negative? please explain
- Question #64cab
- Is this a true statement: If an object is weightless, then no gravity is acting upon it?
- Question #f1534
- What is water pressure and what is an example of how it was used?
- Question #bd4e2
- What is the Archimedes' principle?
- Question #3eb9d
- What happens to the frequency of the wave if its wavelength increases?
- Question #9d0bf
- What is mass?
- Question #40973
- Question #1c5c8
- What is the state of particles and energy between quantum jumps?
- Question #d331e
- Question #31c51
- Question #ad9fe
- Question #917c9
- Question #04317
- Question #9be0d
- Question #b6ee8
- Question #84585
- Question #7385a
- Question #2dc3e
- Question #01d4a
- Question #d2b05
- Question #95e2e
- In one of the statements of thermodynamics first law it states that the total internal energy of an isolated system is constant but isolated system means adiabatic system in which Delta u is equals to zero. I just didn't get that?
- How does the electric potential energy between two positively charged particles change if the distance between them is tripled?
- Why is weightlessness experienced by astronauts when a satellite revolves around the earth?
- How many watt-hours are there in 1000 joules? Please explain mathematically.
- By using Newton's third law how can friction help us move forward?
- P=25 watts W=5000 Joules t=? Formula=____________ Substitution=____________ Answer with unit of measure=__________
- Question #145d8
- Question is given below ?
- What is the strongest power ever found?
- What is Bohr's theory of compound nucleus ?
- Why are fuses connected in parallel to loads??
- Why are rockets launched eastward at Cape Canaveral?
- Angle between Velocity & force On a particle in Uniform circular motion ?
- Find the magnitude of the force which when applied to a point (0.40m) to the right of the support will keep the meter stick in equilibrium?
- If the vibrations of a string are to be increased to a factor of 2,then what should the tension in the string be made?
- Question #8801d
- A sprinter finishes the 100 m dash in 9 seconds. What was the sprinter's speed?
- A rain drop, with a mass of 2.30 mg falls to the ground. As it is falling, what magnitude of force does it exert on the earth?
- A Force of 15 N accelerates an object by 2m/s2. what force is needed to give the same object an acceleration of 6m/s2?
- Question #1524e
- Heat is added to a system, and the system does 49 J of work. If the internal energy increases by 7 J, how much heat was added to the system?
- Can someone help me solve this pressure problem?
- In one cycle, a heat engine takes in 810 J of heat from a high-temperature reservoir, releases some heat to a lower-temperature reservoir, and does 411 J of work. What is its efficiency?
- A stream 50m wide is flowing at 15m/s. Isaac can swim at a speed of 20m/s in calm water. In what direction ( angle ) must Isaac set off if he must reach the opposite bank by the shortest route?
- A steel ball of diameter 2mm falls at constant rate 0f 10cm in 3.4secs through oil in a relatively large jar. calculate the coefficient of viscosity assuming the density of the oil and ball to be 920 and 7700kgm^3 respectively?
- Question #a0223
- What substance is reduced in a lead storage battery?
- Tower 300m above the ground dropped A 1kg Hammer.how much potential energy does it have the instant it is dropped.How much kinetic energy does it have the instant right before it hits the ground.how much potential energy does it have once it hits?
- Sand is deposited at a uniform rate of 20g/s and with negligible kinetic energy unto an empty convegor belt moving horizontally at a constant speed of 10m/s. Calculate the power required to maintain the constant velocity?
- Why does ice have less density then water?
- Question #aac4e
- A car starts from rest with a constant acceleration of 2m/s^2 Determine: (a)the speed at the end of fifth second (b)the distance covered in five seconds (c)the speed after covering 100m?
- How can you find the focus of a concave mirror?
- How to calculate the answer to find total flight of time of a ball fired from the ground with an initial velocity of 100 meter per second at 50 degree the horizontal using (tf²(vfy-Viy)/-ag)?
- A weightlifter lifts a 1,250-N barbell 2 m in 3 s. How much power was used to lift the barbell?
- Why are all Numericals in the chapter -Electricity, based on convectional current and not the electron current?
- Question #f53ce
- Question #31aef
- How much power is used to move a 25 kg mass 8 meters in 15 seconds?
- As frequency goes up, what happens to the potential to do damage to the human body?
- To the nearest order of magnitude, how many times greater than the speed of sound is the speed of light?
- Question #f15bd
- Why does the image of the ball at the back seem smaller than the others although they have the same size?
- What average net force is required to bring a 1640kg car to rest from a speed of 75km/h within a distance of 90m?
- The time period of S.H.M of a particle is 12 seconds. What is the phase difference between the position at t=3 s and t=4 s?please give a detailed explanation.
- It’s mid afternoon and you are canoeing down a river that empties into a large lake. You are having a hard time making progress because of a stiff wind in your face. Is this situation likely to get better or worse at sunset? Explain.
- Sarah backstrokes at an average speed of 8 meters per second how long would it take her to complete a race of 200m?
- A refrigerator is operating between 300K & 400K. Find its coefficient of performance?
- Weight of object at earth surface is 10 kg. Find the weight of object at the centre of earth?
- By how much does the ball clear or fall short of clearing the crossbar??
- Having difficulty in this Calorie equation. Can someone help?
- How do I solve for initial velocity with the given data? ( Kinematics questions)
- As the direction of electronic in the circut Is from negative terminal to positive terminal of battory so how can it possible for an electron to move from the low potential to high potential in the external circut not inside the battory?
- What is the path of the ray reflected from the mirror?
- The objects named K,L and M are placed in from of a concave mirror as shown in the figure below correctly shows the images of the objects?
- What is the speed and mass of the object?
- 4,020 J of heat is added to a system while 4,922 J of work is done on the system. What is the change in internal energy?
- What is the centripetal acceleration component? Magnitude
- Calculate the wavelength of an electromagnetic wave of frequency 15 MHZ?
- How can i calculate distance and displacement here?
- What down the semi-empirical mass formula for the liquid drop model? Explain all the terms.
- How do I answer this buoyancy question?
- What angle did the hawk make with the horizontal during its descent?
- What is the tension in a wire supporting a 1250.0 N underwater camera submerged in water? The volume of the camera is 8.3x10-2 m3.
- At this instant, find the radial acceleration?
- The spectrum of white light consists of _____________?
- What is the range of the stone if it is released when the sling is inclined at 30.0° with the horizontal at A?
- If a body vibrates 104 times in second, what is the time period of it ?
- What value would u give the actual index of refraction of the plastic block?
- Do emitted photoelectrons have the same kinetic energy when frequency is kept constant but intensity is varied?
- A 14.0 kg bucket is lowered vertically by a rope in which there is 166 N of tension at a given instant. Determine the magnitude of the acceleration of the bucket. Is it up or down ?
- What average force is required to stop a 1500 kg car in 9.0 s if the car is traveling at 95 km/h ?
- A plane is flying at an altitude of 8000 m at a speed of 250 m/s. At what horizontal distance ahead of its target must a water balloon be released to strike the target on the ground (neglecting air resistance)?
- The SI unit of the coefficient of areal expansion is?
- What initial speed must he throw so that it goes through the hoop without striking the backboard?
- An object having weight on earth surface 800newton find weight of same object when it kept 800km depth?
- 2. If the figure to the right shows the reflected ray from the mirror. Which one of the figures below shows the incident ray?
- Electric circuits?
- Electric circuits problem?
- What is the gravitational potential energy of a 61.2-kg person standing on the roof of a 10-story building relative to the tenth floor, sixth floor, and first floor? Each story is 3.50 m high.
- How does the mass of the object at rest (box or cup) affect how far it travels when hit by the metal ball?
- Can someone explain electric potential energy in a way I can understand?
- A block that is connected moves with a period of 0.8 s. Another block is placed on it . How can I maximum value of amplitude si that the second block will not slip?
- A system releases 318 kJ of heat while 289 kJ of work is done on the system. What is the change in internal energy?
- Tharmal energy may be transferred through a vacuum by what?
- Magnetizing force is produced in a ferromagnetic material due to current ?
- What causes a person in circular motion to feel a push away from the direction of their acceleration?
- Not sure how to begin?
- Question #9ae53
- A gas in a cylinder with a moveable piston is heated with 94 J of energy, causing the piston to rise. If the internal energy of the system increases by 30 J, how much work is done by the gas?
- Question #92618
- Question #ea004
- An electric field of 7.00×10^5 V/m is desired between two parallel plates, each of area 45.0 cm2 and separated by 2.45 mm of air. What charge must be on each plate?
- Help physics ?
- If Gravitational constant #G#; Planck's constant #h# and velocity of light #c# are fundamental quantities; the dimension of radius of gyration will be??
- If the equation of a progressive wave is #y_1=asin(omega t-kx)#,then what is the equation of its reflected wave at a free boundary?
- Marcus Aurelius is playing with his mouse cat toy. He throws the mouse toy straight up in the air with an initial velocity of 3.5 m/s. How long (how many seconds) until the mouse toy returns to him? Air resistance is negligible.
- If force and displacement of a partical in the direction of force are doubled, then work will be??
- Question #31def
- Venus is an inner planet which orbits the Sun in almost the same plane as the Earth. Its average radius of orbit is 0.72 AU. Viewed from the Earth’s equator, estimate maximum number of hours before sunrise for which Venus can be observed in the night sky?
- Watering a garden?
- Can anyone please work out the projectile motion questions?
- Are light rays refracted away from or towards the normal as they pass obliquely from a medium of lower index of refraction into a medium of higher index of refraction?
- How can you diverge a beam of light through a concave mirror ? Pls reply quick
- What is the period of a pendulum if it's height is zero ?
- Can someone please help with this ***KINEMATICS*** question?
- Draw a sankey diagram, for a hydroelectric dam, from reservoir to home, and for a wind turbine, from blades to home?
- How much energy is needed to heat up 10 litres of water for a bath, if the temperature of cold water is 10 degrees and the bath temperature is 38 degrees?
- What happens to kinetic energy when threshold frequency is increased ?
- How does the liquid drop model account for Nuclear fission ?
- What are the evidences in favor of the Nuclear Shell Model ?
- What does #u# and #v# represent in the following diagram?
- A car mass 1330 kg is traveling at 28 m/s. The driver applies the brakes to bring the car to rest over a distance of 79 meters. What is the retarding force acting on the car?
- An object is dropped off a building measuring 65m tall. How long does it take for the object to fall?
- The position equation for a particle is where s is measured in feet and t is measured in seconds. Find the acceleration of the particle at 4 seconds?
- Dimensional formula of 1/4πE0?
- How to find final speed?
- The position function for a particular object is s = –23t^2 + 65. Which of the following statements is true?
- A tuning fork of 200Hz is in unioson with sonometer wire. If percentag increase in tension of wire is 1,then percentage change in frequency is???
- How to calculate ammeter and voltmeter readings?
- A photon has momentum of magnitude 8.59x10-28kgm/s. What is the energy of this photon in eV?
- Two bulbs 100W,250V and 200W,250V are connected in series across a 500V line. Then what will happen?? a)100W will fuse b)200W will fuse c)both will fuse d)no bulb will fuse
- If the charges on q1 and on q2 are tripled, what will happen to the force between the two charges?
- If the distance between two charges is doubled, what will happen the force between the charges?
- Does anyone know how to work this Celsius equation?
- How to derive 1st of motion from second law of motion?
- What is the acceleration at the highest point of a ball thrown upwards? a) Upwards b) Downwards c) Zero d) Horizontal
- What is the current in a circuit?
- A box with a a weight of 215 N rests on on ramp. There is a frictional force of 27 N exerted on the box directed up the ramp. If the ramp is inclined at 30°, what force must be applied at an angle of 40° to the ramp to maintain equilibrium?
- A WEIGht lifter lifts a set of weights a vertical distance of 1.50 m. If a constant net force of 250 N is exerted on the weights, what is the net work done on the weights?
- Please solve the problem based on the conservation of energy?
- In refractive index of glass slab if angle of incidence to normal is 20 then the angle of reflection and angle of emergence is 30 is it the right answer???
- If the distance between two charges is halved, what will happen the force between the charges?
- If the charge on q1 is tripled, what will happen to the force between the two charges?
- Question #4955e
- A shopper in a supermarket pushes a cart with a force of 40N. Find the work done by the shopper on the cart as the shopper moves along a 15.0 m length of aisle?
- Question #11715
- Question #68dbe
- A metallic disc is being heated, its area(in #m^2#) at anytime t (in second) is given by A=#5t^2+4t+8. Calculate rate of increase of area at t = 3s?
- If the distance between two charges is doubled, what will happen the force between the charges?
- Is the newton's third law of motion is applicable in the equation of hydrogen + chlorine = hydrogen chloride ?
- What does “ real image” mean how can you obtain a “ real image” ? Explain.
- How long does it take for the rock to hit the ground?
- Question in details please help asap!!!?
- Can you answer the question ?
- Why are there two tension values in my system?
- A train accelerates from rest at a constant rate #alpha# for distance X and time T(a).after that it retards at a constant rate #beta# for distance Y and time T(b).Which of the following relations is correct?
- A boy can swim with a speed of 26m/s in still water. He wants to swim across a 150m river from a point A to point B which is directly opposite the other side of the river. The river flows with a speed 10m/s?
- Question #719e3
- Question #b8162
- A car of mass 1500 kg is moving with a speed of 12.5m/s on a circular path of radius 20m on a leveled road.what should be the friction force between the car and the road do that the car does not slip.?
- How to solve Motion Question?
- A charged particle of mass 1 kg is projected with initial velocity #(3hati + 4hatj)#m/s in an uniform electric field,#vecE = (-2.5hati)# N/C and gravitational field, #vecg = (-10hatj)m/s^2# ?
- Where is the light bulb located in a car headlight?
- A small jet is flying with a speed of 70 m/s at a height of 1000 m and has a mass of 1000 kg. What is the total mechanical energy of the jet?
- A person needs to reach 120km/hr on an 800ft runway. What is the minimum constant acceleration needed?” I know I need the equation for either velocity or her position and then differentiate from there, but I’m having trouble getting started. Thanks!
- The curved portion is smooth and the horizontal portion are rough.The block is released from P.At what distance from A the block will stop. ( μ=0.2) ?
- When a falling meteoroid is 3.4 times the radius of the earth from the Earth's surface, what is its acceleration?
- When excavating a hole how do you calculate mass 1mx1mx1m in to cubic metres ?
- Using the data in the graphs that accompany this problem, determine a) the period of the wave.. b) the wavelength of the wave... c)the speed of the wave?
- A student drops a 0.011 kg super ball from a height of 1 m. If the ball returns to a height of .75 m, how much mechanical energy was lost to dissipative forces?
- A 15 kg object moving to the right a 22.5 m/s makes an elastic head on collision with a 30 kg object moving to the left at 18 m/s. After the collision the smaller object 15 kg object moves to the left at 31.5 m/s. What is the velocity of the 30 kg marble?
- An electric heater put in some water raises the temperature of the water from 40°C to 100°C in 6 minutes. After another 25 minutes, it's noticed that half the water has boiled away. Neglecting heat losses to the surrounding, calculate shc of vaporisation?
- Vehicle A weighs 3,000 pounds. Under ideal conditions traveling at 55 miles per hour, its braking distance is 200 feet. If it carries 3,000 pounds of extra weight, what is the new braking distance?
- Question #8e836
- How to determine the magnitudes of v1 and v2? Thanks.
- A person standing at the top of a hemispherical rock of radius R kicks a ball (initially at rest on the top of the rock) to give it horizontal velocity #v_i#. What must be its minimum initial speed if the ball is never to hit the rock after it is kicked?
- Question #c40ec
- A wave has a frequency of 62 Hz and a speed of 25 m/s (a) What is the wavelength of this wave (b) How far does the wave travel in 20 seconds?
- A trough of mass 9 Kg is supported by 2 uniform discs that roll without sliding at all surfaces of contact. Mass of each disc is 6 Kg and radius 100 mm. A constant force of 135 N acts on the trough as shown?
- Question #f46fd
- What is the magnitude of the gravitational force on Mars, with a mass of #6.34 \times 10^ 23# and a radius of #3.43 \times 10^6#m?
- How do you find a unit vector in the direction of i+j+k?
- Show that the maximum horrizontal range of a projectile is four times the corresponding maximum height?
- What two quantities are changed by a transformer? a) Power b) Potential Difference c) Current d) Resistance
- Can someone explain me how to do this question? Thanks.
- The moon revolves around the earth because the earth exerts a radial force on the moon. Does earth perform work on the moon?
- A certain rocket can do a maximum of #2.00 times 10^10#J of work on a 500-kg object. What is the maximum distance from the center of the Earth the object can reach?
- A body vibrates 10 times in 0.1 second about its mean position. What is the frequency of the body?
- Can anyone answer and explain? Thanks.
- What are the daily encounters we experience of Bernoulli effect?
- Why the method of doing these 2 question are not the same ? Please help!!
- Suppose I'm carrying a heavy bag across a horizontal plane. Why is work done? Why does it depend on the weight of the bag if no work is done?
- The vector v has magnitude 13 and makes an angle 285 of with the positive x direction ?
- How do I determine the wavespeed from given frequency and wavelenght?
- If the light travels at speed of 3.0×108m/s. How long will it take to cover the 100m ?
- Sand is deposited at a uniform rate of 20g/s and with negligeable kinetic energy unto an empty convergor belt moving horizontally at a constant speed of 10m/s. Calculate the force required to maintain the constant velocity?
- If a string vibrates 10 times in 10 seconds, what is the frequency?
- Point charges + 4q, -q and +4q are kept on the X-axis at points x = 0, x = a and x = 2a respectively,Then What will happen?
- Physics help, I'm not sure what this question is asking?
- A light with a wavelength of #540nm# passes trough a diffraction grating that has #5000# slits and is #16 mm# wide. What is the angle #theta# that will the highest order visible diffraction maxima be?
- What is working principle of ac generator?
- Question #6426a
- A sample of gas has a volume of 0.05 m3 at a pressure of 2 atmospheres and a temperature of 20 0C. How many moles of gas are in the sample?
- Is the equation #St=u+1/2 a*(2t-1)# dimensionally correct? I mean Dimension of S and U are not the same,right?
- What does the slope of velocity-time graph represent?
- Why some impurities are used with semi conductors in the solar panel?
- The range of a projectile is affected by what?
- If mass and distance from earth to r is half then what will happen to Gravitational potential energy?
- How force is a vector quantity?
- A 0.5 kg block of iron is pushed 2 m across a level table where there is a coefficient of friction is 0.4. The specific heat of iron is 449 J/kg0C. How much work was done by friction?
- Power supplied to a particle of mass 2kg varies with time as P=3t^2 /2.Here t is in second.If velocity of the particle at t=0 is v=0.The velocity of particle at time t=2 sec will be?
- If A=-4i+4j+4k and B=2i+2j+2k,find a unit vector of A×B. Also find angle between them?
- What is the volume of 3 moles of CO2 gas at a temperature of 200 C and pressure of 5 atmospheres?
- Question #23013
- A rock falls from rest from a height of 490 m. How long does it take to reach the ground?
- If Mere an astronaut on the moon drops a hammer from a height of 1.4 meters. How long will it take the hammer to reach the ground if the gravitational acceleration on the moon is (one sixth) of that on earth?
- A bullet is fired at an angle of 450. Neglecting air resistance, what is the direction of acceleration during the flight of the bullet?
- Double Slit Question?
- A rock falls from rest from a height of 490 m. How long does it take to reach the ground?
- 540g of ice at 0°C is mixed with 540g of water at 80°C. The final temperature of the mixture is..???
- Please help with this physics problem?
- Two pendula of length 1m and 1.21m respectively start swinging together with same amplitude. Find the number of swings executed by longer pendulum before they will again swing together??
- Please solve with a detailed explanation?
- A bullet with mass 0.005 g is fired from a rifle of mass 5kg. The bullet has a speed of 400 m/s towards the right . HOw do I explain why the riffle jumps backwards as the bullet is fired? What is the momenetum of the bullet?
- Question #d6245
- Three concurrent forces of same magnitude are in equilibrium. What is the angle between the forces? Also name the triangle formed by the forces as sides??
- If a car goes 0 to 60 mph in 7.5 seconds, and its initial velocity is 15 mph, what is its rate of acceleration, and how fast would it be going after 500 feet?
- Question #7c07a
- A wave equation is given by y=7cos(12.56t-0.04x). Find frequency and wave velocity?
- Motion and Constant Acceleration. A speeding car is traveling at a constant speed of #30.0m/s# when it passes a stopped police car. The police car accelerates at #7.0m/s^2#. How fast will it be going when it catches up with the speeding car?
- Question #15c33
- Question #7f6ae
- Ships and boats of different size and weight float in the sea. Explain how it is possible?
- Question #21a7e
- Is the mass of a body and acceleration working on that are doubled then force acting on it will be become?
- Significance of the negative values for potential difference to current graph?
- A turntable rotates at 45 r.p.m. What is it's angular speed?
- Question #35fbb
- A body is moving with an initial velocity (v) from an initial position (#x_0#) the expression for the acceleration #a (t) =3t^2-4t^4#. Find the expression for x (t) and v (t)?
- Question #fa5ff
- A bouncy ball is dropped from a height of #144# feet. The function #h=−16x^2+144# gives the height, #h#, of the ball after #x# seconds. When does the ball hit the ground?
- Difference between kinetics and kinematics?
- How is it that a planet doesn't move at a constant speed but is able to cover an equal distance over equal times?
- What is the wavelength of object inside inside a material if the material has an index of refraction #n = 38.6# and frequency #0.32# THz?
- What is the reading of the voltmeter when switch is off and on?
- Question #acc69
- 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?
- A 24 kg rock is teetering on the edge of a 112 m high cliff. If the rock falls, how much kinetic energy will it have just before it hits the ground?
- 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?
- 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?
- Question #6932a
- 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?
- 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?
- 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?
- How do you calculate the resultant of the following vectors 4.0N and 10.0N with an angle of 90 degrees between them?
- 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?
- 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?
- Question #f771e
- 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??
- Question #117e2
- 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?
- 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.
- Question #e5b61
- Question #325da
- 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 ?
- Question #46623
- 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?
- Question #a263a
- 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?
- 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!?!
- Question #210c2
- 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?
- Question #3e069
- 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?
- Question #66be1
- 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?
- Question #8f0ee
- 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?
- Question #b6919
- 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?
- Question is shown below?
- What is the action/reaction force pair involved when you catch a ball?
- Period of conical pendulum?
- Question #f7942
- 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.?
- 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?
- Question #52753
- 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)?
- Question #5cc30
- 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?
- Question #9d8a3
- 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" ??
- Question #e9474
- Question #95c28
- Question #e570b
- 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?
- Question #996b0
- 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?
- Question #431e3
- 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???
- Question #7e103
- Question #a51d1
- 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 ?
- 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?
- 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?
- Question #a0027
- 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?
- Question #b667f
- What is the speed in km/h if the distance is 500 metres and time taken = 100 seconds ?
- 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?
- Question #22cd7
- 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 throug