Ahooke's law spring is compressed 12.0 cm from equilibrium, and the potential energy stored is 72.0 j. what compression (as measured from equilibrium) would result in 100 j being stored in this case?

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.