SATHEE: Properties Of Solids And Liquids Question 442

Properties Of Solids And Liquids Question 442

Question: 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/kg and g=10N/kg]

Options:

A) 34 km

B) 544 km

C) 136 km

D) 68 km

Show Answer

Answer:

Correct Answer: C

Solution:

[c] According to question only one-quarter of the heat produced by falling piece of ice is absorbed in the melting of ice. i.e., $\frac{m g h}{4} = m L$

$\Rightarrow h = \frac{4 L}{g} = \frac{4 \times 3.4 \times 10^{5}}{10} = 136 k m .$

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Properties Of Solids And Liquids Question 442

Question: 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=10N/kg]

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Question: 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/kg and g=10N/kg]