Thermal Energy

A van of mass 1500kg travelling at a speed of 54 km h^(-1) is stopped in 10 s Assuming that all the machantical energy lost appeats as thermal energy in the brake mechanical find the evarage in the brake of thermal energy in cal s^(-1)

A nuclear reactor using .^(235)U generates 250 MW of electric power. The efficiency of the reactor (i.e., efficiency of conversion of thermal energy into electrical energy) is 25% . What is the amount of .^(235)U used in the reactor per year? The thermal energy released per fission of .^(235)U is 200 MeV .

A current i_1 = i_10 sin omegat passes through a resistor of resistance R . How much thermal energy is produced in one time period? A current i_2 = -i_0 sin omegat passes through the resistor. How much thermal energy is produced in one time period? If i_1 and i_2 both pass through the resistor simultaneously, how much thermal energy is produced? Is the principle of superposition obeyed in this case?

Statement-1: Work and Heat are two equivalent form of energy. Statement-2: Work is transfer of mechanical energy irrespective of temperature-differene whereas heat is transfer of thermal energy because of temperature difference only.

A 450 muF capacitor is charged to 295 V . Then, a wire is connected between the plates. How many joule of thermal energy are produced as the capacitor discharges if all of the energy th was stored goes into heating the wire?

On the basis of intermolecular energy and thermal energy explain why? (i) a solid has rigidity but a liquid does not have rigidty. (ii) gases have high compressibility but solids and liquids have poor compressibility.

A horizontal force of magnitude 41.0 N pushes a block of mass 4.00 kg across a floor where the coefficient of kinetic friction is 0.600. (a) How much work is done by that applied force on the block-floor system when the block slides through a displacement of 2.00 m across the floor ? (b) During that displacement, the thermal energy of the block increases by 40.0 J. What is the increase in thermal energy of the floor ? (c) What is the increase in the kinetic energy of the block ?