A cylindrical air duct in an air conditioning system has a
Chapter , Problem 82(choose chapter or problem)
A cylindrical air duct in an air conditioning system has a length of 5.5 m and a radius of 7.2 3 1022 m. A fan forces air (h 5 1.8 3 1025 Pa ?s) through the duct, so that the air in a room (volume 5 280 m3 ) is replenished every ten minutes. Determine the diff erence in pressure between the ends of the air duct.
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