A mass m fish is attached to the lower end of a vertical ideal spring that has negligible mass and force constant k. Initially, the spring is neither stretched nor compressed. The fish is released from rest. The acceleration of gravity is –g. Just after the fish is released from rest, which describes the work done on the fish?

When the velocity of an object is doubled, by what factor is its momentum changed? by what factor is its kinetic energy changed? a) the momentum is zero. b) the momentum is not zero. c) difficult to say.

In a heat engine if 1000 j of heat enters the system the piston does 500 j of work, what is the final internal energy of the system if the initial energy was 2000 j? 1. write the equation 2.list out your known variables 3.plug the numbers into the equations 4.solve 5.write your solution statement that includes initial energy and final

What will happen in a hybrid vehicle if current flow becomes too high due to a short?