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Air is heated as it flows through a constant diameter tube. The air enters the tube...

Air is heated as it flows through a constant diameter tube. The air enters the tube at 50 psia and 80 F with an average velocity of 10 ft/s at the entrance. The air leaves at 45 psia and 255 F.
a) Sketch the control volume
b) Determine the average velocity of the air (ft/s) at the exit
c) If 23 lbm/min of air is to be heated, what diameter (in.) tube is required?

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