I need help finding the solution

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.

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

What’s #16 asking and how do i solve it?