Q
The normal stress is the same in all directions at a point in a fluid, only when the fluid__________________?
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A
A. Is at rest & has zero viscosity
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B
B. Is frictionless
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C
C. Fluid layer has no motion relative to an adjacent layer of fluid
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D
D. Is incompressible & frictionless
Correct Answer:
D. D. Is incompressible & frictionless