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 : [NEET - 2016] |
[Latent heat of ice is \[3.4\text{ }\times \text{ }{{10}^{5}}\text{ }J/kg\] anz\[g=10\text{ }N/kg\]] |
A) 34 km
B) 544 km
C) 136 km
D) 68 km
Correct Answer: D
Solution :
[d] \[\frac{mgh}{4}=mL\] |
\[\Rightarrow \] \[h=\frac{4L}{g}=\frac{4\times 3.4\times {{10}^{5}}}{10}=136\,km\]. |
You need to login to perform this action.
You will be redirected in
3 sec