Stokes' law for the viscous force on a sphere is most reliable under which condition?
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Question

Stokes' law for the viscous force on a sphere is most reliable under which condition?

G1 Physics · Accepted Answer

Stokes' law describes creeping flow around a sphere. Its validity requires viscous effects to dominate over inertial effects. This corresponds to a very small Reynolds number: Re ≪ 1. Therefore the correct condition is Re much smaller than 1. Correct option: C.