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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