A car of mass 500 kilogram moving at 10 metres per second engine does not work on the car and the speed increases to 16 metres per second how much work is done by the engine to increase speed of the car? Answer is 39000j

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.

What is the orbital period of a spacecraft in a low orbit near the surface of mars? the radius of mars is 3.4×106m.

The dominant wavelength of energy emitted by the sun is