(Answered) Question millikan used stokess law which says that a small

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Question: Millikan used Stokes's law, which says that a small sphere of radius a falling with velocity v in a homogeneous medium of viscosity η = 18.6× 10^-6 Pas is subject to a retarding force F = 6πηav.

He observed that a drop of oil of density ρ = 0.92gcm^-3 would fall 0.522cm in 13.6s.

a. What was the radius of the drop?

b. What was its mass?

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