An object is 45 m above the ground when it is dropped. how fast is the object going just before it hits the ground?

Iflow from a warmer object to a cooler object until both objects are the same temperature what am i?

What are the phases shown in a and d called?

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