Question:
A small metal sphere of radius a is falling with a velocity
Last updated: 7/31/2022
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A small metal sphere of radius a is falling with a velocity v through a vertical column of a viscous liquid. If the coefficient of viscosity of the liquid is n, then the sphere encounters an opposing force of: A 6πnа² v B 6nv/πa C 6πnav D πnv/6a3