Obtain an expression for the excess pressure inside a spherical air bubble of radius r inside a liquid of surface Tension T. A U-tube, which has its ends open and its limbs vertical, contains a liquid surface tension 0.025 Nm-1 and density 800 Kg m-3. the angle of contact b/w the liquid and the tube being zero. The diameter of one limb is 0.4 mm and of the other 0.2 mm. find the difference of levels in the two limbs.

Obtain an expression for the excess pressure inside a spherical air bubble of radius r inside a liquid of surface Tension T. A U-tube, which has its ends open and its limbs vertical, contains a liquid surface tension 0.025 Nm-1 and density 800 Kg m-3. the angle of contact b/w the liquid and the tube being zero. The diameter of one limb is 0.4 mm and of the other 0.2 mm. find the difference of levels in the two limbs.