The lower end of a capillary tube is dipped into water and it is seen that the water ris
Channel: Doubtnut
Date: 2020-06-28

The lower end of a capillary tube is dipped into water and it is seen that the water rises through 7.5 cm in the capillary. Find the radius of the capilary. Surface tension of water `=7.5xx10^-2Nm^-1`. Contact angle between water and glass `=0^@. Take g=10ms^-2`.