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A capillary tube with inner cross-sectio...

A capillary tube with inner cross-section in the form of a square of side a is dipped vertically in a liquid of density `rho` and surface tension `rho` which wet the surface of capillary tube with angle of contact `theta` . The approximate height to which liquid will be raised in the tube is : (Neglect the effect of surface tension at the corners of capillary tube)

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