Question

A capillary tube of length $l=50cm$ and radius $r=1/4mm$ is immersed vertically into water. Find the capillary rise in the tube in cm , to the nearest integer. Angle of contact$=0^0$. Take coefficient of surface tension as $72$ $dyne/cm$, $g=1000cm{s}^{-2}$. Round of to nearest integer.

Answer 1

$H=\frac{2\sigma cos\theta }{\rho gr}$

$H=\frac{2\times 72\times cos\left(0\right)}{1\times 0.025\times 1000}=5.76cm$