define surface tension. state its S.I. unit and dimension. what is surface film
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the tension of the surface film of a liquid caused by the attraction of the particles in the surface layer by the bulk of the liquid, which tends to minimize surface area.
The SI unit of surface tension is a Newton per meter or N/m.
A layer of the surface of a liquid whose thickness is equal to the range of an intermolecular force is called surface film. Concept: Mechanical Properties of Fluids
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