The weight of liquid column in a capillary tube is 11xx10^(-4)N. If the radius of tube is 7 mm, calculate the surface tension of liquid.

The weight of liquid column in a capillary tube is 11xx10^(-4)N. If th

1.	The weight of liquid column in a capillary tube is 11xx10^(-4)N. If the radius of tube is 7 mm, calculate the surface tension of liquid.
Answer» Solution :Weight of liquid column `W=11xx10^(-4)N` Radius of CAPILLARY TUBE `r=7mm=7xx10^(-3)m` Weight of liquid column `W=2pirS` Surface tension `S=(W)/(2pir)=(11xx10^(-4))/(2xx(22)/(7)xx7xx10^(-3))impliesS=0.025N//m`