February 19, 2021
As is known, all forms of energy can be transformed into each other. The energy can be neither created nor destroyed, but only transferred from one object to another or transformed from one form into another. Mass can also neither be created nor destroyed. Some objects have several forms of energy at the same time and the total energy of the object is the sum of all these energies. For example, a moving electrically charged particle (with mass m>0) has pure mechanical energy, electric energy of the electric field, and magnetic energy.