Question: Air flows through a circular pipe at a rate of 8.3 kg/s. The Mach number at the inlet to the pipe is 0.15 and at the exit to the pipe is 0.5. The pressure and temperature at the inlet are 350 kPa and 38°C, respectively. Assuming the flow to be adiabatic, and the mean friction factor to be 0.005, find the length and the diameter of the duct and the pressure and temperature at the exit of the duct.