(Answered) Air flows in a 20-cm-diameter duct at 120-c and 120 kpa

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Air flows in a 20-cm-diameter duct at 120-C and 120 kPa with a mass flux of 5 kg=s. The circular duct converts to a 20-cm square duct in which the temperature and pressure are 140-C and 140 kPa, respectively. Determine the velocities in both sections of the duct.

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