NEET Solved Paper 2016 Question 35
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\text{.4 }\times\text{ 1}{0^{5}}\text{ J/kg} $ and g = 10 N/kg]
Options:
A) 34 km
B) 544 km
C) 136 km
D) 68 km
Show Answer
Answer:
Correct Answer: D
Solution:
- $ \frac{mgh}{4}=mL $
$ \Rightarrow $ $ h=\frac{4L}{g}=\frac{4\times 3.4\times 10^{5}}{10}=136,km\text{.} $
