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a tennis player places a 50 kg ball machine on a frictionless surface. the machine fires a 0.054 kg tennis ball horizontally with a velocity of 35 m/s toward the north. what is the final velocity of the machine? answer in units of m/s
A parallel-plate capacitor with circular plates of radius 80 mm is being discharged by a current of 7.0 A. At what radius (a) inside and (b) outside the capacitor gap is the magnitude of the induced magnetic field equal to 70% of its maximum value? (..
Two identical 0.13 kg blocks (labeled 1 and 2) are initially at rest on a nearly frictionless surface, connected by an unstretched spring, How far did the center of mass of the real system move
The length of a spring increases by6.9cm from its relaxed length when a mass of1.7kg is hanging in equilibrium from the spring. How much elastic potential energy is stored in the spring
a child rolls a 0.685kg basketball up a long ramp. the basketball can be considered a thin walled hollow sphere. find the maximum vertical height increase of the ball
a simple open u-tube contains mercury. when 5.9 cm of water is poured into the right arm of the tube how high above its
Suppose that blood is pumped from the left side of a person's heart at a rate of 105.0 cm3/s, What is the pumping rate into the right side of the heart
An alpha particle (m = 6.7 ´ 10-27 kg, q = +3.2 ´ 10-19 C) has a speed of 20 km/s at point A and moves to point B where it momentarily stops. Only electric forces act on the particle throughout this motion. Find out an electric potential difference V..
at the familab accelerator in batavia illinois protons having momentum 5.00x 10-16 kg.ms are held in a circular orbit
When rebuilding her car's engine, a physics major must exert 450 N of force to insert a dry steel piston into a steel cylinder at a constant velocity. What is the normal force between the piston and cylinder
An elderly sailor is shipwrecked on a desert island, but manages to save his eyeglasses. What is the magnifying power of the telescope he can construct with these lenses
A hollow spherical shell with mass 1.65 rolls without slipping down a slope that makes an angle of 40.0 with the horizontal. Find the magnitude of the acceleration of the center of mass of the spherical shell
If the refractive index of air is 1.00029 and all the air is pumped out of the cell, how many fringe-pairs will shift by
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