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A 10kg box slides 4.0 m down the frictionless ramp then collides by a spring whose spring constant is 250 N/m. (4m is the length of the ramp not the height) What is the maximum compression of the spring? At what compression of the spring does the box have its maximum speed?
a uniform magnetic field of 0.15 t is directed along the positive x-axis. a positron moving at 5.0 x 106 ms enters the
a 2.10 x 102-n force is pulling an 85.0-kg refrigerator across a horizontal surface. the force acts at an angle of
q1.a grinding wheel initially at rest is rotated with constant angular acceleration of 3.73 rads2 for 9.03 s. the wheel
A car accelerates uniformly from rest to a speed of 64.7 km/h (18.0 m/s) in 10 s. Find the distance the car travels during this time
An inductor with L = 9.15mH is connected across an ac source that has voltage amplitude 45.5V. Does the source voltage lag or lead the current
suppose that resting on your non-conducting desktop is a tiny piece of paper m 0.08 g that happens to carry a charge of
A diver springs upward from a diving board. At the instant she contacts the water, her speed is 8.90 m/s, and her body is extended at 75.0 degrees with respect to the horizontal surface of the water. Determine her initial velocity
A particle of mass 7.22 x 10^-27 kg, moving at 7.06 x 10^5 m/s, strike an identical particle which is initially at rest. What are the final speeds of the particles
A ball with 3gr mass and momentum P strikes elastically a wall and bounces off. Calculate the change in the ball's momentum
A man throws a stone vertically downward with an initial speed of 11.5 m/s from the roof of a building, 39.0 meter above the ground. Determine the speed of the stone at impact
in bohr model of hydrogen atom the average kinetic energy of the electron in the first excited state is four times the
A Carnot heat engine takes 2000J of heat from the high temperature reservoir at 227 degrees Celsius, What is the Carnot efficiency
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