Q.

Identify the correct statement

A. Frictional resistance in a pipe depends on the square of area of the wetted surface
B. Frictional resistance in a pipe decreases with density of the fluid
C. Frictional resistance in a pipe is dependent on the fluid pressure
D. Frictional resistance in a pipe increases with the square of velocity
E. Frictional resistance in a pipe is independent on surface roughness
Answer» D. Frictional resistance in a pipe increases with the square of velocity
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