1.

When a fluid flows over a solid surface, the___________________?

A. Velocity is uniform at any cross-section
B. Velocity gradient is zero at the solid surface
C. Resistance between the surface & the fluid is lesser as compared to that between the fluid layers themselves
D. Velocity is not zero at the solid surface
Answer» C. Resistance between the surface & the fluid is lesser as compared to that between the fluid layers themselves


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