An alternating current has a peak value of 325v. calculate the root mean square of the voltage?

Avery hard rubber ball (m = 0.5 kg) is falling vertically at 4 m/s just before it bounces on the floor. the ball rebounds back at essentially the same speed. if the collision with the floor lasts 0.05 s, what is the average force exerted by the floor on the ball?

How does the amount of energy required to hold each proton and neutron in the nucleus compare to the energy released when they are removed?

For which pair of objects would adding the same a