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If a scale is under water in a pool and an object is placed on the scale, which force is the scale reading?
A ball of mass 0.40 kg moving at 180 m/s east strikes a second ball, initially at rest of mass 0.500 kg. What is the final velocity of the second ball
Two trains are traveling toward each other in still air at 27.6 m/s relative to the ground. One train is blowing a whistle at 330 Hz. The speed of sound is 343 m/s.
Some sliding rocks approach the base of a hill with a speed of 18.0m/s. Find the acceleration of the rocks as they slide up the hill
While rearranging a dorm room, a student does 276 J of work in moving a desk 1.7 m. What was the magnitude of applied horizontal force.
A motor cycle rider moving with an initial velocity of 8.0 m/s uniformly accelerates to a speed of 17 m/s in a distance of 30m. And how long does this take
A 5.43 kg block free to move on a horizontal, frictionless surface is attached to one end of a light horizontal spring. find the speed of the block at the equilibrium position of the spring
Breathing deep, your professor inhales air at 0.203 m/s. As the air goes through a constriction in his bronchus, it doubles in speed. How much does the air pressure drop in the constriction
The distance between two consecutive nodes of a standing wave is 22.2 cm. The hand generating the pulses moves up and down through a complete cycle 2.74 times every 6.48 s. Find the velocity of the wave
A wodden raft has a density of 0,5*10^3kg/m^3 and dimension of 3,05m*6,1m*0,305m. How deep does it sink into the water when unloaded
a mass m hanging on a spring has a natural frequency f. if the mass is increased to 4 m what is the new natural
A person of mass 71 kilogram stands at the center of a rotating merry-go-round platform of radius 2.7 meter and moment of inertia 820kg•m2. Obtain the angular velocity when the person reaches edge
The difference in electric potential between a thunder cloud and the ground is 1.58 108 V, Determine the change in electric potential energy of one of the electrons that move to the cloud
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