2. The specific conversion relationship is as follows: 1 Ji Jiao (GJ)= 1000 megajoules (MJ) = 10000000 kilojoules (KJ) =1000000 joules (J).
3. Heat refers to the energy transferred by the temperature difference between the thermal system and the outside world. Heat is a process quantity, so heat can only be said to be absorbed and released. Can't say contain. This transfer process is called heat exchange or heat transfer. The unit of heat is joule (j). All life activities of the human body need energy,