A glass manometer with oil as the working fluid is connected to an air duct as shown in Fig. P5–37C. Will the oil in the manometer move as in Fig. P5–37C a or b? Explain. What would your response be if the flow direction is reversed?

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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?