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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 $\times 10^{5}$ J $k g^{- 1}$ and g = 10 N $k g^{- 1}$ )

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34 km

544 km

136 km

68 km

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detailed solution

Correct option is C

14mgh=mL⇒h=4Lg=4×3.4×10510=13.6×104=136×103m=136km

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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-1 and g = 10 N kg-1 )

Remember concepts with our Masterclasses.

Ready to Test Your Skills?

free study material

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 $\times 10^{5}$ J $k g^{- 1}$ and g = 10 N $k g^{- 1}$ )