Question: Air flows through a convergent-divergent duct with an inlet area of 5 cm2 and an exit area of 3.8 cm2. At the inlet section, the air velocity is 100 m/s, the pressure is 680 kPa, and the temperature is 60°C. Find the mass flow rate through the nozzle and, assuming isentropic flow, the pressure, and velocity at the exit section.