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Air, with density of 0.00237 slug/ft3 and a kinematic viscosity of 0.000157 ft2/s, is forced through...

Air, with density of 0.00237 slug/ft3 and a kinematic viscosity of 0.000157 ft2/s, is forced through a horizontal square 9-by 9-in duct 100 ft long at 25 ft3/s. Find the pressure drop if the relative roughness is 0.0003 ft.

Select one:

a.
5.5 lbf/ft2

b. 40 lbf/ft2

c. 1.5 lbf/ft2

d. 15 lbf/ft2

Engineering   Mechanical-Engineering   
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