Question

What is capillarity? Derive an expression for which the liquid rises in
capillary tube of radius r. Explain what happens when the length of a
capillary is less than the height upto which the liquid may rise in it?
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Answer 1

Explanation:

capillarity, rise or depression of a liquid in a small passage such as a tube of small cross-sectional area, like the spaces between the fibres of a towel or the openings in a porous material. ... Capillarity is the result of surface, or interfacial, forces.