A fluid is a substance that ____________________?
Correct answer: C. Can not remain at rest under the action of any shear force
- A. Always expands until it fills any container
- B. Is partially incompressible
- C. Can not remain at rest under the action of any shear force
- D. Can not be subjected to shear force
Explanation
A fluid continuously deforms and therefore cannot remain at rest when any finite shear stress is applied. It can experience shear stress while moving, so “cannot be subjected to shear force” is too absolute.
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