A body of mass 25 kg is dragged on a horizontal rough road with a constant speed of `20 kmh^(-1)`. If the coefficient of friction is 0.5, find the heat generated in one hour. If 50% of the heat is absorbed by the body, find the rise in temperature. Specific heat of the material of the body is 0.1 cal `g^(-1).^(@)C^(-1)`.

A block having mass of 2 kg is pulled over a horizontal surface at a constant velocity of 20 km cdot h^(-1) . If the frictional coefficient is 0.5, calculate the amount of heat produced in 1 h. If 50% of the heat produced i absorbed by block, what will be the increase in its temperature? Specific heat of the body = 0.1 cal cdot g^(-1) cdot^(@)C^(-1) .

A body of mass 20 g at 100^(@)C is dropped into 200 g of water at 30^(@)C . What will be the final temperature of the mixture ? Specific heat of the material of the body ="0.1 cal. G"^(-1).^(@)C^(-1).

Thermal capacity of a body of mass 10 g is "8 cal ".^(@)C^(-1) . The specific heat of the material of the body is

Find the heat energy required to raise the temperature of 5 kg of water at 80^@C to 100^@C . (Specific heat of water is 1 cal g^(-1)""^(@)C^(-1) )

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)

Find the heat required to convert 20 g of iceat 0^(@)C into water at the same temperature. ( Specific latent heat of fusion of ice =80 cal//g )

Mass of a piece of cppper is 20 g. Find the rise in temperature of the piece when 100 cal of heat is supplied to it? Specific heat of copper ="0.09 cal. g"^(-1).^(@)C^(-1).

If the heat required to raise the temperature of a body of mass m through t^0C is H. then the specific heat of the substance of the body is