Apackage is dropped from a hovering helicopter.

if it takes 15.0s before the package strikes the ground, how high above the ground was the package when it was released? (neglect air resistance and weight if the package)

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