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A long capillary tube of radius r = 1 mm...

A long capillary tube of radius `r = 1 mm` open at both ends is filled with water and placed vertically. What will be the height (in `cm`) of the column of water left in the capillary walls is negligible. (surface tension of water is `72 "dyne"//"cm"` and `g = 1000 "cm"//"sec"^(2)`)

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The correct Answer is:
`3`
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