Suppose a force does 50 J of work on a system. At the same time, 50 J of heat leaves the system. What is the change in the internal energy of the
system? *
A. +100 J
B.+50J
C. -50 J
DOJ

Debbie places two shopping carts in a cart corral she pushes the first cart which then pushes a second cart what force is being exerted

The diagram shows a series of volcanic island and a hot spot determine the direction of movement of the tectonic plate that for the island

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.