21. Determine the pressure at A in bar gage due to the deflection of the mercury, rl dn 13.57, in the U-tube gage shown in Fig. 1-8. D_3.9 m 3.6 m 양 Water B 3.0 m Fig. 1-8

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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?