A block of ice with mass m falls into a lake. After impact, a mass of ice `(m)/(5)` melts. Both the block of ice and the lake have a temperature of `0^(@)C`. If L represents the latent heat of fusion, the distance the ice falls before striking the surface is

M g of ice at 0^@C is to be converted to water at 0^@C . If L is the latent heat of fusion of ice, the quantity of heat required for the above operation would be

Find the heat required to convert 20 g of ice at 0⁰C into water at the same temperature . (Specific latent heat of fusion of ice = 80 cal/g)

Calculate the heat gained by 50 g of ice at 0^(@)C to change into water of the same temperature. (Latent heat of fusion of ice is 80 cal/g)

How many calories of heat will be absorbed when 2kg of ice at 0^(@)C melts ? ( Specific latent heat of fusion of ice = 80 cal //g )

A piece of ice is floating in a beaker containing water when ice melts, the temperature falls from 20^@C to 4^C When ice melts, the temperature falls from 20^@C to 4^@C and the level of water :

m' mass of ice at 0^(@)C is put in same mass of water. Find the temperature of water needed just to melt the ice completely.

A block of ice having mass 6 kg is pulled 50 m horizontally over a surface of ice. The temperature of both the ice is 0^(@)C , coefficient of friction between the surfaces of ice is 0.03 and latent heat of fusion of ice is 80 cal cdot g^(-1) . Calculate the amount of ice that melts.

A cubical block of ice of mass m and edge L is placed in a large tray of mass M. If the ice melts, how far does the centre of mass of the system ''ice plus tray'' come down?