What is thermal energy
Thermal energy is such energy which you can understand by its name, thermal is called thermal in Hindi, which you can also call heat. Thermal energy also tells us how much temperature we have given to a molecule, due to which its molecule starts moving. start moving away from each other and thermal energy has a very weak force, in which the molecules are very far away.
how can generate it
When we heat a solid such as ice, it has the highest amount of internal molecule force at that time. So it melts and becomes water {liquid} i.e. if thermal energy has increased in it, then molecules start moving in it which increases thermal energy if we heat the melt water further i.e. at 100 "c then thermal in it energy and increase
The main fixed use of thermal energy is done in the thermal plant, in the thermal plant, it is used in the generation of electricity and in the engine itself, it is possible to move the axles of the wheels by converting the thermal energy into mechanical energy.