NEET · Physics · STD 11 - 10.1, thermonetry,thermal expansion and calorimetry
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 \(3.4 \times 10^{5}\; J / k g\) and \(g=10\; N / kg ]\)
- A \(544 \)
- B \(136 \)
- C \(68\)
- D \(34\)
Answer & Solution
Correct Answer
(B) \(136 \)
Step-by-step Solution
Detailed explanation
\(\frac{m g h}{4}=m L\) \(\Rightarrow h=\frac{4 L}{g}=\frac{4 \times 3.4 \times 10^{5}}{10}=136 km\)
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