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Physics · PYQ NEET UG 2016(1)
हिन्दीA 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 \( g = 10 \) N/kg)
Correct answer · Option 3
\( 136\text{ km} \)
Explanation
Given \( \frac{1}{4} mgh = mL \implies h = \frac{4L}{g} = \frac{4 \times 3.4 \times 10^5}{10} = 1.36 \times 10^5\text{ m} = 136\text{ km} \).
