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A telephone cord is 3.85 m long and has a mass of 0.190 kg. A transverse pulse is produced with plucking one end of the taut cord. The pulse makes four trips down and back along the cord in 0.740 s. What is the tension in the cord?
The electric field between the plates of a parallel-plate capacitor is horizontal, uniform and has a magnitude E. What is the mass of the object
A pitcher throws a 0.140 kg baseball, and it approaches the bat at a speed of 30.0 m/s. The bat does Wnc = 60.0 J of work on the ball in hitting it. determine the speed of the ball after the ball leaves the bat
A 2.05 g ping-pong ball rubbed against a wool jacket acquires a net positive charge of 1.26 ?C. How many electrons were removed from the ping-pong ball
how far is this point horizontally from the end of the ramp.
A 10 \rm g bullet traveling at 440m/s strikes a 12kg , 1.2-\rm m-wide door at the edge opposite the hinge. The bullet embeds itself in the door, What is the angular velocity of the door just after impact
A child sitting 1.06 m from the center of a merry-go-round moves with a speed of 1.35 m/s. Calculate the centripetal acceleration of the child
Calculate the kinetic energy that the earth has because of (a) its rotation about its own axis and (b) its motion around the sun. Assume that the earth is a uniform sphere and that its path around the sun is circular. For comparison, the total ene..
If it actually hits the ground with a speed of 7.80 m/s, what is the magnitude of the average force of air resistance exerted on it
A softball of mass 0.220 kg that is moving with a speed of 5.5 m/s (in the positive direction) collides head-on and elastically with another ball initially at rest. Calculate the mass of the target ball
The plate seperation of a parallel plate capacitor is 1 cm. The potential on the negatively charged plate of the capacitor is zero. find the strength of the electric field in the capacitor
A beam of electrons is accelerated from rest and then passes through a pair of identical thin slits that are 2 nm apart. Calculate the speed of the electrons
A 0.410 kg pendulum bob passes through the lowest part of its path at a speed of 3.13 m/s. What is the tension in the pendulum cable at this point if the pendulum is 76.2 cm long.
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