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![[Post New]](/templates/default/images/icon_minipost_new.gif) 20 Jul 2007 15:00:30 IST
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While defining surface tension it is defined that force is perpendicular to an imaginary line lying on the surface of liquid surface in equilibrium. This force acts on both sides of the imaginary line perpendicular to it but parallel to the surface of the liquid and produces a kind of tension to the liquid surface. This force per unit length of the imaginary line drawn on the surface of the liquid is called surface tension. Hope the concept is clear. 
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