A fan is to accelerate quiescent air to a velocity of 9 m/s at a rate of 3 m3 /s. If the density of air is 1.15 kg/m3 , the minimum power that must be supplied to the fan is (a) 41 W (b) 122 W (c) 140 W (d) 206 W (e) 280 W

A fan is to accelerate quiescent air to a velocity of 9 m/s at a rate of 3 m3 /s. If the density of air is 1.15 kg/m3 , the minimum power that must be supplied to the fan is (a) 41 W (b) 122 W (c) 140 W (d) 206 W (e) 280 W

Principles of Heat Transfer (Activate Learning with these NEW titles from Engineering!)

8th Edition

ISBN:9781305387102

Author:Kreith, Frank; Manglik, Raj M.

Publisher:Kreith, Frank; Manglik, Raj M.

Chapter7: Forced Convection Inside Tubes And Ducts

Section: Chapter Questions

Problem 7.4P

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A fan is to accelerate quiescent air to a velocity of 9 m/s at a rate of 3 m3 /s. If the density of air is 1.15 kg/m3 , the minimum power that must be supplied to the fan is

(a) 41 W (b) 122 W (c) 140 W (d) 206 W (e) 280 W

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