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1. Air whose density is 0.078 lbm/ft3 enters the duct of an air-conditioning system at a volume flow rate of 450 ft3 /min. If the diameter of the duct is 10 in, determine the velocity of the air at the duct inlet and the mass flow rate of air.

2. Air enters a 28-cm diameter pipe steadily at 200 kPa and 20°C with a velocity of 5 m/s. Air is heated as it flows, and leaves the pipe at 180 kPa and 40°C. Determine

(a) the volume flow rate of air at the inlet,

(b) the mass flow rate of air, and

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Computer Engineering, Engineering

Category:- Computer Engineering
Reference No.:- M92031294

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