A barometer contains two uniform capillries of radii `1.44 xx 10^(-3)m` and `7.2 xx 10^(-4)m`
Channel: Doubtnut
Date: 2020-04-12

A barometer contains two uniform capillries of radii `1.44 xx 10^(-3)m` and `7.2 xx 10^(-4)m`. If the height of the liquid in the narrow tube is `0.2 m` more than that in the wide tube, calculate the true pressure difference. Density of liquid `= 10^(3) kg//m^(3)`, surface tension `= 72 xx 10^(-3) N//m` and `g = m//s^(2)`.