6)
Air at 288 K and 275 kPa abs enters a pipe and is flowing in isothermal compressible flow in a
commercial pipe having an ID of 0.080 m. The length of the pipe is 60 m. The mass velocity at the
entrance to the pipe is 165.5 kg/m2 · s. Assume 29 for the mol
ecular weight of air. Calculate the
pressure at the exit.
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