Question: Air flows through a convergent-divergent nozzle from a large reservoir in which the pressure is 300 kPa and the temperature is 100°C. The nozzle has a throat area of 1 cm2 and an exit area of 4 cm2. The nozzle discharges into another large reservoir in which the pressure can be varied. For what range of back-pressures will the mass flow rate through the nozzle be constant and what will the mass flow rate be under these circumstances?