what is surface tension
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❁ Surface tension is the property of the liquid due to which the free surface of the liquid like a stretched membrane which tries to contract and occupy minimum surface area.
❁ Surface tension is a vector quantity.
❁ It decreases with increase in temperature and vanishes at critical temperature where the surface vanishes due to the transformation of liquid to vapour.
❁ The dust particles are lubricant (contamination) material particles on the liquid surface decreases surface tension of the liquid this is because of less adhesive force between them.
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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.
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