What is the gravitational potential energy of a 55 kg box that is 8.0 m above the ground?

Who was the first scientist to measure speed as distance over time?

Chemical energy is a form of energy. a. heat b. kinetic c. potential d. electromagnetic

6–43 a food department is kept at 2128c by a refrigerator in an environment at 308c. the total heat gain to the food department is estimated to be 3300 kj/h and the heat rejection in the condenser is 4800 kj/h. determine the power input to the compressor, in kw and the cop of the refrigerator.