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Explain surface tension in the context o...

Explain surface tension in the context of potential energy.

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The liquid stays together because of attraction between molecules.

Schematic picture of molecules in a liquid , at the surface and balance of forces.
(a) Molecule inside a liquid . Forces on a molecule due to others are shown . Direction of arrows indicates attraction of repulsion .(b) Same , for a molecule at a surface. (c ) Balance of attractive (A) and repulsive (R ) forces.
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