The circulation 'T' around a circle of radius 2 units for the velocity field u = 2x + 3y and v = -2y is A B D -6π units -12π units -18π units -24π units

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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?