Surface Tension I Definition I Diploma notes

Surface tension.

Surface tension is defined as the tensile force acting on the surface of a liquid in contact with gas or on the surface between two miscible liquid such that the contact surface behaves like a membrane under tension.

It is denoted by the Greek letter 'σ' Sigma.

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Define Surface tension

The phenomenon of Surface tension.

Due to molecular attraction, liquid possesses certain properties such as cohesion and adhesion. Cohesion means inter-molecular attraction between molecules of the same liquid. That means it is tensile stress. Thus cohesion between liquid particular at the surface gives rise to surface tension.
Surface tension is defined as the tensile force acting on the surface of a liquid in contact with gas or on the surface between two miscible liquid such that the contact surface behaves like a membrane under tension.

Example of surface tension

1. Walking on water.
2. Surface tension disinfectants.
3. Don't touch the tent.
4. Floating a needle.
5. Surface tension and droplets.
6. why bubbles are round.
7. Washing with cold water.
8. Soaps and detergents. 

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