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A capillary tube of radius 5 xx 10^-4m i...

A capillary tube of radius `5 xx 10^-4`m is immersed in a beaker filled with mercury. The mercury level inside the tube is found to be `8 xx 10^-3` m below the level of reservoir. Determine the angle of contact between mercury and glass. Surface tension of mercury is `0.465 N//m` and its density is `13.6 xx 10^3 kg//m^3`. (g=`9.8 m//s^2`)

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