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A long thin straight uniform wire of neg...

A long thin straight uniform wire of negligible radius is supported on the surface of a liquid. The width of the container is `2d` and the wire is kept at its centre, parallel to its length (as shown in figure). The surface of the liquid is depressed by a veritcal distance `y(y lt lt d)` at the centre as shown in figure. If the wire has mass `lambda` per unit length, what is the surface tension of the liquid? igonre end effects.

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