Answers

2016-08-28T23:16:02+05:30
Surface tension is the force per unit length of the line of contact (at the boundary) between a liquid and a solid surface.  For example, when water is put in a narrow test tube, the surface of water touches the glass at the boundary of its surface.  At this boundary, there is a force upwards acting on the surface of water.  This is due to adhesive forces of glass on water molecules.

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