What is thermal energy definition?

Thermal energy refers to the energy content of a substance or a system, which arises from the movement and vibration of its particles. In simple terms, it is the energy that is associated with heat. The thermal energy of an object is directly proportional to its temperature, and the greater the temperature of an object, the more thermal energy it contains. This energy is transmitted from one object to another through the process of heat transfer, which can occur through conduction, convection, and radiation. Thermal energy plays a crucial role in various fields, including physics, chemistry, and engineering, and is used in numerous applications such as power generation, heating and cooling systems, and industrial processes.