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R fall with velocity v through a liquid having coefficient of viscosity n . Find the viscous on n r and v. take k =bπ ​

Answer»

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 η, then the sphere ENCOUNTERS an opposing force ofA6πηa2vBπa6ηvC6πηavCorrect AnswerD6a3πηv



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