The minimum radius of drop of water that might evaporate at 0 degree Centigrade without heat being supplied to it is \( x\times 10^{-11}\text{ m} \), find \(x\).

Take surface tension as \(120\times 10 ^{-3} \text{ N/m} \) and \( L_{v}=660 \text{ KCal/kg}, J=4 \text{ J/cal} \).

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