The total internal energy of all molecules of a substance is called :

1. magnetic energy
2. heat energy
3. thermal energy
4. electrical energy

The specific heat capacity of water is:

1. 4200 J kg^-1 K^-1
2. 420 J g^-1 K^-1
3. 0.42 J g^-1 K^-1
4. 4.2 J kg^-1 K^-1

Temperature determines the direction of :

1. flow of heat
2. flow of energy
3. flow of motion
4. none of the above

The amount of heat energy contained in a body depends on its :

1. mass
2. temperature
3. material of the body
4. all of the above