:) will award brainliest + 20pts

The plum pudding model of the atom states that ?

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 energy transformations occur each time the skateboarder rolls up the ramp?