Surface tension || Excess pressure || Capillary action

Surface energy || Excess Pressure

Excess Pressure and Capillary Tubes

Explain how does surface tension account for (i) Capillary action of liquids (ii) Spherical shape of liquid drops

If R is the radius of a soap bubble and S its surface tension, then the excess pressure inside is

Capillary action is due to

Surface Tension |Excess Pressure (अतिरिक्त दबाव)|Angle Of Contact (संपर्क का कोण)|OMR

A capillary tube with inner cross-section in the form of a square of side a is dipped vertically in a liquid of density rho and surface tension rho which wet the surface of capillary tube with angle of contact theta . The approximate height to which liquid will be raised in the tube is : (Neglect the effect of surface tension at the corners of capillary tube)

Excess pressure example||Contact angle||capillary action (1st method)

Surface charge density of soap bubble of radius r and surface tension T is sigma .If P is excess pressure the value of sigma is

The surface tension for pure water in a capillary tube experiment is