A piece of ice falls from a height h so that it melts completely. Only one–quarter of the heat produced is absorbed by the ice and all energy of ice gets converted into heat during its fall. The value of h is[Latent heat of ice is 3.4 × 105 J/kg and g = 10 N/kg]

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A piece of ice falls from a height h so that it melts completely. Only one–quarter of the heat produced is absorbed by the ice and all energy of ice gets converted into heat during its fall. The value of h is
[Latent heat of ice is 3.4 × 10⁵ J/kg and g = 10 N/kg]

136 km

68 km

34 km

544 km

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