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Questions  

The volume of a liquid of density ρ and viscosity η flowing in time t through a capillary tube of length / and radius R, with a pressure difference P, across its ends is proportional to.

a
P 2R2t/ηl2
b
PR4/ηlt
c
PR4t/ηl
d
ηR4/lt

detailed solution

Correct option is C

V =πPR4t8ηL

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Liquid flows through two capillary tubes connected in series. Their lengths are L and 2L and radii r and 2r respectively. The pressure difference across the first and
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