An iron ball requires 1000 J of heat to raise its temperature by `20^@C`. Calculate the heat capacity of the ball.

An iron ball requires 5000 J heat energy to raise its temperature by 20^@C . Calculate the heat capacity of the iron ball.

An iron ball requires 9000 J heat energy to raise its temperature by 10^@C . Calculate the heat capacity of the iron ball.

One mole of an ideal gas requires 207 J heat to rise the temperature by 10 K when heated at constant pressure. If the same gas is heated at constant volume to raise the temperature by the same 10 K , the heat required is (Given the gas constant, R = 8.3 J/mol-K).

A body of mass 750 g requires 13,500 J of heat eneragy in order to raise its temperature from 25^@C to 55^@C . Calculat its specific heat capacity.

If heat a supplied to a solid, its temperature

Shows a peddle wheel couple to a mass of 12 kg through fixed frictionless pulley. The paddle is immersed in a liquid of heat capacity 4200 J K^(-1) kept in an adiabatic container. Consider a time interval in which the 12 kg block falls slowly through 70cm. (a) how much heat is given to the liquid ? (b) how much work is done on the liquid? (c ) calculate the rise in the temperature of the liquid neglecting the heat capacity of the container and the paddle.

A metal ball of mass 1kg is heated by means of a 20W heater in a room at 20^(@)C . The temperature of the ball becomes steady at 50^(@)C . (a) Find the rate of loss of heat to the surrounding when the ball is at 50^(@)C . (b) Assuming Newton's law of cooling, calculate the rate of loss of heat to the surrounding when the ball is at 30^(@)C . (c) Assume that the temperature of the ball rises uniformly from 20^(@)C to 30^(@)C in 5 minutes. Find the total loss of heat to the surrounding during this period. (d) Calculate the specific heat capacity of the metal.

A ball is dropped on a floor from a height of 2.0m After the collision it rises up to a height of 1.5m . Assume that 40% of the mechanical energy lost goes as thermal energy into the ball. Calculate the rise in the temperature of the ball in the collision specific heat capacity of the ball is 800J kg^(-1) K^(-1)