Question: Air flows at a steady rate at a subsonic velocity through a pipe with an internal diameter of 26 mm and a length of 15 m. The pressure and temperature in the air at the inlet to the pipe are 140 kPa and 120°C, respectively. Assuming that the flow is adiabatic and using an average friction factor for the flow of 0.005, find the maximum possible mass flow rate through the pipe. Also, find the temperature and pressure at the exit of the pipe when the Mach number at the exit is equal to 1.