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प्रश्न
Draw a neat labelled diagram showing forces acting on the meniscus of water in a capillary tube.
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उत्तर
r = radius of capillary tube
h = height of liquid level in the tube
T = surface tension of liquid
ρ = density of liquid
g = acceleration due to gravity
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`(a) 4piR^2T[n^(1/3)-1]`
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