A cylinder of internal cross-sectional area 2 sq.m. is submerged in a liquid to a depth of 1 m. The cylinder is initially empty and contains a plugged orifice of diameter 20 mm in the bottom. The orifice has a discharge coefficient approximately equal to unity. If the plug is removed, how long will it take the cylinder to fill to the level of the surrounding liquid?

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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?