Conservation of energy

This fundamental principle states that the total amount of energy in the Universe is constant, where energy cannot be created or destroyed but can change forms, such as between mechanical, electrical, and chemical energies. The law signifies a foundational concept in the field of physics and underscores the interconvertibility of various forms of energy.
 Hermann von Helmholtz Germany 1847 Conservation of energy

This fundamental principle states that the total amount of energy in the Universe is constant, where energy cannot be created or destroyed but can change forms, such as between mechanical, electrical, and chemical energies. The law signifies a foundational concept in the field of physics and underscores the interconvertibility of various forms of energy.