Solve the below:
Q: An air tank of volume 1.5 m3 is at 800 kPa and 20°C when it begins exhausting through a converging nozzle to sea-level conditions. The throat area is 0.75 cm2. Estimate
(a) The initial mass flow;
(b) The time to blow down to 500 kPa; and
(c) The time when the nozzle ceases being choked.