Air enters a 15-m-long, 4-cm-diameter adiabatic duct at V 1 = 70 m/s, T 1 = 500

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Air enters a 15-m-long, 4-cm-diameter adiabatic duct at V1 = 70 m/s, T1 = 500 K, and P1 = 300 kPa. The average friction factor for the duct is estimated to be 0.023. Determine the Mach number at the duct exit, the exit velocity, and the mass flow rate of air.

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