1.

A 10 cm long wire is placed horizontal on the surface of water and is gently pulled up with a force of 2×10−2 N to keep the wire in equilibrium. The surface tension (in Nm−1) of water is

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A 10 cm long wire is placed horizontal on the surface of water and is gently pulled up with a force of 2×102 N to keep the wire in equilibrium. The surface tension (in Nm1) of water is



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