Air flows at steady state through a horizontal,
Chapter 9, Problem 9.110(choose chapter or problem)
Air flows at steady state through a horizontal, well- insulated, constant-area duct of diameter 0.1 m. At the inlet, \(p_{1}=6.8 \mathrm{bar}, T_{1}=300 \mathrm{~K}\). The temperature of the air leaving the duct is 250 K. The mass flow rate is 270 kg/min. Determine the magnitude, in N, of the net horizontal force exerted by the duct wall on the air. In which direction does the force act?
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