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A capillary tube of inner radius 0.5 mm ...

A capillary tube of inner radius `0.5 mm` is dipped keeping it vertical in a mercury of specific gravity 13.6, surface tension `545 dyn e//cm` and angle of contact `135^(@)` . Find the depression or elevation of liquid in the tube.

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The correct Answer is:
`(2.1 cm)`
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