Question: Air flows through a convergent-divergent passage. The passage inlet area is 5 cm2, the minimum area is 3 cm2 and the exit area is 4 cm2. The air velocity at the inlet to the passage is 120 m/s. The pressure is 700 kPa and the temperature is 40°C. Assuming that the flow is isentropic, find the mass flow rate through the passage, the Mach number at the minimum area section, and the velocity and pressure at the exit section.