What is surface tension?
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Surface tension is the type of force which is usually exerted on the surface. Mainly in the case of water.
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Surface tension is the tendency of liquid surfaces to shrink into the minimum surface area possible. Surface tension allows insects, to float and slide on a water surface without becoming even partly submerged.
Symbol of surface tension
σ
As a measure of work per unit area or force per wetted length, interfacial tension has the units mN/m and is designated by the symbol σ or γ (lower case sigma or gamma).
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