A barometer contains two uniform capillries of radii 5.0 x 10^-4 m and 1.0 x 10^-3 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 = 75 × 10^−3 N/m [...]