The dimensions of surface tension are

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(D) Surface tension is defined as the force per unit length acting on the surface of a liquid.Mathematically,$	ext{Surface tension} = \frac{	ext{For

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$M T^{-2}$

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(D) Surface tension is defined as the force per unit length acting on the surface of a liquid.Mathematically,$	ext{Surface tension} = \frac{	ext{Force}}{	ext{Length}}$.The dimensional formula for force is $[M L T^{-2}]$.The dimensional formula for length is $[L]$.Therefore,the dimensions of surface tension are $\frac{[M L T^{-2}]}{[L]} = [M T^{-2}]$.Thus,the correct option is $D$.

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