Help. I need help, plus it’s 12 points.

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.

Select the three ways that the parallel-plate capacitor differs from a car battery.

How many neutrons does element x if it’s atomic number is 28 and its mass number is 87