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Water rises in a capillary tube upto a c...

Water rises in a capillary tube upto a certain height such that the upward force of surface tension balances the force of `75 xx 10^(-5)N` due to weight of the liquid. If surface tension of water is ` 6 xx 10^(-2)Nm^(-1)`, what must be the internal circumference of the capillary tube?

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