3) Air enters an adiabatic nozzle at 60 ft/sec, 180 psia and 480 F and, after expansion, leaves the nozzle at 15 psia. Use constant specific heats to calculate the nozzle exit velocity (use a reference temperature of 300 F to determine specific heats), if a) Temperature at the nozzle exit is 60 F b) Expansion process is reversible