1.

Find the depression of the miniscus in the capillary tube of diametre `0.4mm` dipped in a beaker containning mercury (density of mercury `=13.6xx10^(3)kg//m^(3)` and surface tension of the mercury is `0.49 N//m` and angle of contact is `135^(@)`).A. `0.025cm`B. `0.021 cm`C. `0.020 cm`D. `0.027 cm`

Answer» Correct Answer - A
`T=(hrdg)/(2costheta)`


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