4.23 An incompressible fluid with a density of 850 kg/m3 flows steadily in the entrance region of a circular tube of radius R = 75 mm. The flow rate is Q = 0.1 m3/s. The velocity profile entering the tube is uniform and that leaving is given by

Find the average velocity, which is also U1, and the maximum velocity at the exit. Determine the pressure drop due to the change in momentum of the flow.

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Umax R