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A piece of ice falls from a height h so ...

A piece of ice falls from a height `h` so that it melts completely. Only one-quarter of the heat produced is absobed 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 xx 10^(5) J//kg` and `g = 10 N//kg`]

A

544 km

B

136 km

C

68 km

D

34 km

Text Solution

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The correct Answer is:
B
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A piece of ice falls from a hight 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 3.4xx10^(5) j//kg and g=10N//kg )

A piece of ice falls from a heighth 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 height from which ice fall . [Latent heat of ice is 3.4 xx 10^(5) J//kg and g = 10 N/kg]

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A block of ice falls from certain height and completely melts. If only 3/4th of the enrgy is absorbed by the block. The height of the fall should be (L=363SI units and g=10ms^(-2) )

A refrigerator takes heat from water at 0^(@)C and transfer it to room at 27^(@)C . If 100 kg of water is converted in ice at 0^(@)C then calculate the work done. (Latent heat of ice 3.4xx10^(5) J//kg )

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