A glass capillary of radius 0.4 mm is inclined at `60^(@)` with the vertical in water. Find the length of water in the capillary tube. (Given, surface tension of water `= 7 xx 10^(-2) N^(-1)`).A. 7.1 cmB. 3.6 cmC. 1.8 cmD. 0.9 cm

A glass capillary of radius 0.4 mm is inclined at `60^(@)` with the ve

1.	A glass capillary of radius 0.4 mm is inclined at `60^(@)` with the vertical in water. Find the length of water in the capillary tube. (Given, surface tension of water `= 7 xx 10^(-2) N^(-1)`).A. 7.1 cmB. 3.6 cmC. 1.8 cmD. 0.9 cm
Answer» Correct Answer - A Use, `h = l cos alpha` `rArr l = (h)/(cos alpha)` where, `h = (2S cos theta)/(rho rg) " "(theta_("water" = 0^(@)))` `:.` The length of water in capillary tube `l = (2S cos theta)/(rho rg cos alpha) = (2 xx 7 xx 10^(-2) cos 0^(@))/(10^(3) xx 0.4 xx 10^(-3) xx 9.8 cos 60^(@))` `= 7.1 cm`

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A glass capillary of radius 0.4 mm is inclined at `60^(@)` with the vertical in water. Find the length of water in the capillary tube. (Given, surface tension of water `= 7 xx 10^(-2) N^(-1)`).A. 7.1 cmB. 3.6 cmC. 1.8 cmD. 0.9 cm

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