A glass tube of 1 mm bore is dipped vertically into a container of mercury, with its lower end 5 cm
Channel: Doubtnut
Date: 2020-08-02

A glass tube of 1 mm bore is dipped vertically into a container of mercury, with its lower end 5 cm below the mercury surface. What must be the gauge pressure of air in the tube to a  hemispherical bubble at its lower end? Given density of mercury ` = 13.6 xx 10^(3) kg//m^(3)`, surface tension of mercury = `440 xx 10^(-3) Nm^(-1)` and `g = 10m//s^(2)`