-Energy, heat energy, which is the format we have humans nung heat comes from multiple locations, such as from the Sun. Energy in the fluid under the ground. The burning of the fuel. Electric energy. Nuclear energy. The power of water in the boiler water. Power flame-The effect of heat make chemical changes such as higher temperature or there is a change of status, and in addition, heat can also cause chemical changes. Unit used to measure the quantity of heat are calories (cal) or j (J) using a tool called the calorie meter.-The unit used to measure the quantity of heat in the various metric systems. Thermal energy in units of calories (cal) or kcal (Kcal), thermal energy in the SI unit of j (J) or kilo-(KJ) in the English system. Thermal energy in units of BT (Btu)
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