Question

From what height should a piece of ice fall so that it completely melts? Only one – quarter of heat produced is absorbed by the ice. Given latent heat of ice is 3.4 × 10⁵ J | Kg and acceleration due to gravity, g = 10m | s²?

Answer 1

Let m = Mass of piece of ice 

h = height from which it falls. 

∴ Loss of Potential energy = m g h 

The Potential energy of ice is converted into heat. 

Since the ice absorbs only one – quarter of this,