- APotential energy
- BKinetic energy
- CHeat energy
- DElectrical energy
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Thermal energy is also known as 'heat energy' or simply 'heat'.
For any exchange of heat, the heat gained by the cold system is equal to heat lost by the hot system. This is known as the law of conservation of energy and is represented by the equation Heat gained = Heat lost.
The relationship between Celsius and Kelvin temperature scales is given by the equation K = C + 273, where K is the temperature in Kelvin and C is the temperature in Celsius. This means that the temperature difference of 1°C is equal to that of 1K.
Temperature is the property which determines whether a body is in equilibrium or not with the surroundings.
The temperature measured in relation to absolute zero using the kelvin scale is known as absolute scale temperature.
The SI unit of heat energy absorbed or evolved is Joule (J). Heat energy is a form of energy that is transferred between two objects due to the difference in their temperatures.
Convection is a process of heat transfer where heat is transferred through the movement of a fluid, such as air or water. This occurs when a heated fluid expands and rises, while a cooler fluid contracts and sinks, creating a circular motion that transfers heat.
Superficial expansion refers to the increase in area of a solid object due to heating. It occurs in all directions, unlike linear expansion which occurs only in one direction.
A kilocalorie is a unit of energy defined as the amount of heat energy required to raise the temperature of 1 kilogram of water by 1 degree Celsius.