A 1800 kg car is parked at the top of a hill 4.7 m high. B. The car’s brakes fail and it rolls down the hill. At the bottom of the hill, what is the potential energy of the car?

Ammonia enters the expansion valve of a refrigeration system at a pressure of 10 bar and a temperature of 18oc and exits at 6.0 bar. the refrigerant undergoes a throttling process. determine the temperature, in oc, and the quality of the refrigerant at the exit of the expansion valve.

Time remainin52: 42the chart shows data for a moving object. which conclusion is best supported by the information inthe chart? time (s)velocity (m/s

Why do astronauts in the space shuttle weigh less?