I need help quickly please

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.

The long handle on a rake is a(n) a. lever b. screw c. wedge d. inclined plane

If a balloon is taken outside on a very cold day, what will occur?