Questions
A cylindrical vessel of area of cross-section A is filled with water to a height H. It has capillary tube of length and radius r fitted horizontally at its bottom. If the coefficient of viscosity of water is , then time required in which level will fall to a height is (density of water is )
detailed solution
Correct option is C
−Adhdt=πhρgr48ηl ⇒∫0tdt=∫HH/2−8ηlAπρgr41hdh or t=8ηlAπρgr4ln2Talk to our academic expert!
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A liquid flows steadily through a series combination of three capillary tubes of radii r, 2r and 3r, all of the same length L. If the pressure difference across the combination is 28 cm of mercury, the pressure difference (in cm of Hg) across the tube of radius 2r is very nearly equal to____cm of Hg
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