Does medicine have an energy conservation law?

conservation of energy. [kon′sərvā′shən]. Etymology: L, conservare, to preserve. (in physics) a law stating that in any closed system the total amount of energy is constant. It is superseded by the special relativity equation e = mc2, but it is still applicable in the chemical process. Mosby's Medical Dictionary, 9th edition. read more

The law of conservation of energy is a principle of physics that states that, in a closed system, energy cannot be created or destroyed. It is expressed in the First Law of Thermodynamics, which states that energy may be transformed into many forms, such as light or heat, but the overall sum of the energies is conserved, or remains constant. read more

However if energy conservation is tested taking mass and energy together the equation holds the conservation. Example -2 The most critical example is pair annihilation. Let us consider a collision between an electron e− and a positron e+, which yields two photons 2 γ. read more