A ball of mass 0.100 kg moving with speed 2.08 m/s hits a wall and bounces back with speed 1.00 m/s in the opposite direction. What is the change in the ball’s kinetic energy?

An automobile steering wheel is shown. what is the ideal mechanical advantage? if the ama is 8, what is the efficiency of the steering wheel?

Two point charges are separated by a certain distance. how does the strength of the electric field produced by the first charge, at the position of the second charge, change if the second charge is doubled? a. the field does not change b. the field strength decreases by half. c. the field strength doubles d. the field strength quadruples

Convection currents are caused by differences in what two things?