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A film of water is formed between two st...

A film of water is formed between two straight parallel wires each `10 cm` long and at a seperation of `0.5 cm`. Calculate the work required to increase `1mm` distance between the wires. Surface tension of water `=72xx10^(-3)N//m`.

Text Solution

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`W=TxxDeltaA=72xx[2xx(10xx0.6-10xx0.5)]=144erg`.
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