The velocity profile in a fully developed laminar flow of water at 40°F in a 250-ft-long horizontal circular pipe, in ft/s, is given by u(r) = 0.8(1 - 625r2), where r is the radial distance from the centerline of the pipe in ft. Determine (a) the volume flow rate of water through the pipe, (b) the pressure drop across the pipe, and (c) the useful pumping power required to overcome this pressure drop.

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Q: w in

A: given: Why does the friction factor increase as the velocity decreases in a laminar flow in a pipe?

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A: is fluid density. is average flow velocity. is internal diameter of pipe. is fluid viscosity.

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A: Step 1: Change the appropriate unit for the diameter Step 2: Then At 20° C get the Uw which is 10-3…

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