A tank circular in cross-section is 10 m high. It takes 8.4 minutes to empty the tank thru a hole at the bottom when the tank is full at the start. a. How long will it take for the water level to drop the upper 3 m? b. If the diam. of the tank is 0.75 m. and the orifice is 50 mm in diam, find the coeff. of discharge C. c. How long will it take to lower the water level to 4 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?