The pressure intensity is the same in all directions at a point in a fluid________________?
Correct answer: C. When there is no motion of one fluid layer relative to an adjacent layer
- A. Only when the fluid is frictionless
- B. Only when the fluid is at rest having zero velocity
- C. When there is no motion of one fluid layer relative to an adjacent layer
- D. Regardless of the motion of one fluid layer relative to an adjacent layer
Explanation
Pressure is isotropic when there is no shear stress, which occurs when adjacent fluid layers have no relative motion. Relative layer motion can produce viscous shear, so pressure need not be the same in every direction.
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