1 Joule is equal to :

1. 10⁶ erg
2. 10⁵ erg
3. 10⁷ erg
4. 10⁹ erg

…………… determines the direction of flow of heat.

1. Heat
2. Temperature
3. Coldness
4. None of these

The amount of heat energy contained by a body depends on :

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

Celsius and Kelvin scales are related as :

1. t K = 273 + t° C

2. t K = 273 - t° C

3. $\dfrac{\text{t K}}{\text{t° C}}$ = 273

4. $\dfrac{\text{273}}{\text{t° C}}$ = T k