The maximum force,in addition to the weight,r | vedclass

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(C) When a wire is pulled from the surface of a liquid,the surface tension acts along both sides of the wire. Therefore,the total length over which th

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$72.8 \, dyne/cm$

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(C) When a wire is pulled from the surface of a liquid,the surface tension acts along both sides of the wire. Therefore,the total length over which the surface tension acts is $2l$.The force $F$ required to overcome the surface tension is given by:$F = T 	imes (2l)$Where:$F = 728 \, dynes$$l = 5.0 \, cm$Rearranging the formula to solve for surface tension $T$:$T = \frac{F}{2l}$$T = \frac{728}{2 	imes 5.0}$$T = \frac{728}{10}$$T = 72.8 \, dyne/cm$Thus,the surface tension of water is $72.8 \, dyne/cm$.

The maximum force,in addition to the weight,required to pull a wire of $5.0 \, cm$ long from the surface of water at a temperature of $20^\circ C$ is $728 \, dynes$. The surface tension of water is:

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