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Define surface tension of a liquid. Ment...

Define surface tension of a liquid. Mention its S.I. unit and dimension.

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Surface tension is defined as the force acting on a unit length of an imaginary line drawn on the free surface of the liquid, the direction of the force being perpendicular to the line so drawn and acting parallel to the surface.
The SI unit and dimensions of surface tension are `Nm^(-1)andMT^(-2)`, respectively.
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