A conical draft-tube having diameter at the top as 2.0 m and pressure head at 7 m of water (vacuum), discharges water at the outlet with a velocity of 1.2 m/s at the rate of 25 m3/s. If atmospheric pressure head is 10.3 m of water and losses between the inlet and outlet of the draft-tube are negligible, find the length of draft-tube immersed in water. Total length of tube is 5 m.

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Pressurized pipe flow

A 15-kilometer-long pipe with a pipe diameter of one meter transports water at a speed of one meter per second. The pipe has a friction coefficient of 0.005. Calculate the frictional head loss?