Answers edited by Steve J.

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• A wrench with a length of #48 cm# is being used to unscrew a #6 cm# bolt. If a torque of #72 Nm# is needed to overcome the friction keeping the bolt in place, what is the minimum torque that must be applied to the wrench to unscrew the bolt?
  
• A rocket is accelerating straight up from the surface. At 1.35s after lift, the rocket clears top of its launch platform, 63m above the ground. After additional 4.45s its 1 km above ground. What's the magnitude of average velocity for the 4.45s part?
  
• At a construction site, a bolt slips over the edge of a steel girder, which is 35 m above the ground. At the same instant, an apple is thrown vertically upwards from the ground with a speed of 15 m/s. How do you solve parts a) and b)?
  
• A ball with a mass of #1 kg # and velocity of #7 m/s# collides with a second ball with a mass of #6 kg# and velocity of #- 4 m/s#. If #40%# of the kinetic energy is lost, what are the final velocities of the balls?
  
• 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?
  
• If a proton,neutron and electron are placed in a magnetic field then which particle will experience zero force?
  
• Find the force between the two charges as well as an angle?
  
• 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 does the Doppler effect occur?
  
• 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?
  
• A car moving at 70 km/hr has a mass of 1700 kg. What force is necessary to decelerate it at a rate of 40 cm/s/s?
  
• 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?
  
• How do you simplify # tan[cos^-1(-(sqrt3/2))]#?
  
• An object with a mass of #6 kg# is hanging from a spring with a constant of #4 (kg)/s^2#. If the spring is stretched by #8 m#, what is the net force on the object?
  
• The collision between a tennis ball and a tennis racket tends to be more elastic in nature than a collision between a halfback and linebacker in football. Is that true or false?
  
• 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 do I find the Voltage of this circuit?
  
• 3/2 as a fraction?
  
• If a person is born every 5 seconds and a person dies every 12 seconds, then how many seconds does it take for the population to grow by one?
  
• How much work is done by the force lifting a 0.1 kg hamburger vertically upward at a constant velocity of 0.3 m from a table? I thought that if it's at constant velocity, there is no work done. However all the answer choices are non-zero. Please help!
  
• What are field forces in physics?
  
• Find the average velocity of a car which travels 360 km in 6 hours, show in m/s and km/h ?
  
• One example of acceleration?
  
• Carl has a piece of toast that has jelly on one side, and he dropped it twice. Both times, it landed with the jelly side up. If he drops it two more times, what is the probability that it will have landed jelly side up a total of three times?
  
• An aircraft from rest accelerates on a runway at 6.50 m/s^2 for 23.25 seconds until it finally takes off the ground. Calculate the distance covered before take off. ??
  
• What is the velocity of a 500kg elevator that has 4000 joules of energy?
  
• Can anyone help me with answering this question?
  
• There are 5 miles to 8 km. How many km in 80 miles?
  
• 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?
  
• True or false? -MOMENT of inertia of a particle rotation about an axis decrease when it's distance from the axis increase. Thanks
  
• Who's interested in a new Socratic on a different website?
  
• A resting car starts accelerating uniformly at #a_1# rate a then moves at a constant velocity =4m/s then decelerates at a constant rate #a_2#. the velocity of the car is greater than 2m/s for 10sec. What is the distance traversed by the car?
  
• What is 7pi in degrees?
  
• Total resistance of the circuit ?
  
• The mass of each car is 600kg, 970kg, 230kg, 810kg, 660kg. The force of friction on each car is 1980N, 3201N, 759N, 2673N, 2178N respectively. What is the magnitude of the backward forces on the 2nd car?
  
• 2 capicitor wire s habing diameter 3.0mm and T having diameter 1.5mm are connected in parallel a potential difference is applied across the ends of parallel arrangement the value of ratio of current T to current S is?
  
• How much force is needed to accelerate a #68# kilogram-skier at a rate of #1.2# #m##/sec^2#?
  
• Who's interested in a new Socratic on a different website?
  
• How do you calculate the force of buoyancy?
  
• 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??
  
• What's the difference between force and energy?
  
• 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 do you convert #0.004%# into a fraction?
  
• Any physics expert online? See the attachment.
  
• In projectile motion, why does an object that is vertically dropped down and an object that is horizontally launched reach the ground at the same time?
  
• 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?
  
• What is your apparent weight?
  
• W=x+y/2? solve for y
  
• Why is the moment of inertia important?
  
• Is the weight of a 100-pound weight for 200 meters is equivalent to carrying a 50-pound weight for 400 meters? Is the enrgy is equivalent ?
  
• A wrench with a length of #10 cm# is used to unscrew a #5/2 cm# bolt. If a torque of #18 Nm# is needed to overcome the friction keeping the bolt in place, what is the minimum torque that must be applied to the wrench to unscrew the bolt?
  
• #3x^2-75=2x^2-36# please how many real solutions ?
  
• How do you solve #n^ { 2} - 20n - 96= 0#?
  
• What is the difference between temperature and heat ?
  
• Why is angular momentum perpendicular?
  
• You answered my question as yes someone answered no . I need correct answer for the question is kilometer is SI unit of length?
  
• You answered my question as yes someone answered no . I need correct answer for the question is kilometer is SI unit of length?
  
• An object is charged when it has a charge imbalance which means the?
  
• Two charges #+1*10^-6# and #-4*10^-6# are separatd by a distance of 2 m. Where is the null point located?
  
• When a 40-N force, parallel to the incline and directed up the incline, is applied to a crate on a frictionless incline that is 30° above the horizontal, the acceleration of the crate is 2.0 m/s^2, up the incline. The mass of the crate is ?
  
• An object travels North at #9 m/s# for #4 s# and then travels South at #3 m/s# for # 1 s#. What are the object's average speed and velocity?
  
• A loaded ski lift pulls 20 chairs with people sitting in them up 200 meters. Each chair with a person has 250 kg of total mass. How much work does it take to lift them?
  
• What is the final velocity of the lighter object? (See below)
  
• Why is the voltage across a bulb the same as the battery in a series circuit?
  
• If a #3/2 kg# object moving at #4/3 m/s# slows to a halt after moving #1/3 m#, what is the coefficient of kinetic friction of the surface that the object was moving over?
  
• In which of these situations the work done by the force acting on the slab will be greater?
  
• What is #(4x^2y^3z)^4#?
  
• By using Newton's third law how can friction help us move forward?
  
• 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?
  
• What affects the level at which a ship floats in the water?
  
• Electricity problem..... please can you solve this...?
  
• When gravitational forces and air resistance equalize on an object that is falling toward Earth and the object stops accelerating, what is the velocity of an object called?
  
• 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?
  
• What quantities determine the torque on an object?
  
• In an 80 km biathlon, a competitor completes the bicycle leg in 2 hours and the running leg in 40 minutes. If the competitor cycles 20 km/h faster than he runs, at what speed does he cycle?
  
• A truck starts from rest at the top a slope which is 1 m high and 49 m long. What is the acceleration and it's speed at the bottom of the slope assuming friction is negligible?
  
• Potential combination of cells neither increases the current nor the ppyential difference then what is the advantage of connectings cells in parallel?
  
• 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#
  
• Which of the following quantities is different from the others?
  
• Why is angular momentum of the disk itself conserved?
  
• 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?
  
• Thomas swimming in around pool that has a radius of 10 feet if you swimming five laps around the outside of the pool how far has he gone ?
  
• Determine true velocity?
  
• A circuit with a resistance of #6 Omega# has a fuse that melts at #8 A#. Can a voltage of #64 V# be applied to the circuit without blowing the fuse?
  
• How to decide which forces that works on the acceleration?
  
• Does amplitude of a spring mass system change when mass is added?
  
• 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?
  
• Only two horizontal forces act on a 3.0 kg body that can move over a frictionless floor. One force is 9.0 N, acting due east, and the other is 8.0 N, acting 62 degree north of west. What is the magnitude of the body's acceleration?
  
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