Question

The radius of a Capillary tube 1S 0.04m. When placed in a Beaker cotaining Water, the through the Capilary tube by .05cm.Calculate the Coefficient of Surface Tension observed in the tube. Take g-10m/s

Answer 1

As we know,

$$h=\dfrac{2\sigma}{\rho gr}→\sigma=\dfrac12h\rho gr,\\\space\\ \sigma=\dfrac12·0.0005·1000·10·0.04=0.1\text{ N}·\text m.$$