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When a vertical capillary of length l wi...

When a vertical capillary of length `l` with a sealed upper end was brought in contact with the surface of a liquid, the level of this liquid rose to the height `h`. The liquid density is `rho`, the inside diameter the capillary is `d`, the contact angle is `theta`, the atmospheric pressure is `rho_(0)`. Find the surface tension of the liquid. (Temperature in this process remains constant.)

Text Solution

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The correct Answer is:
`[rhogh+(P_(o)h)/(l-h)](d)/(4costheta)`
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