The normal stress in a fluid will be constant in all directions at a point only if
A
it is incompressible
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B
it has uniform viscosity
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C
it has zero viscosity
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D
it is friction less
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E
it is at rest
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Solution
The correct option is E it is at rest If the body is at hydro-static balance which means the liquid is at rest, then the normal stress in fluid will be constant in all directions at a point.