tömegenergia
Tömegenergia refers to the mass–energy equivalence in special relativity, the idea that mass and energy are interchangeable aspects of the same physical quantity. In modern physics, the invariant mass m0 (rest mass) is related to total energy E and momentum p by E^2 = (m0 c^2)^2 + (pc)^2. For a particle at rest, E0 = m0 c^2, which is the rest energy. The more energy a system has (through motion or other forms), the more massive it effectively becomes from the viewpoint of a given frame. In general, scientists prefer to speak of energy and momentum rather than "relativistic mass".
The key equation E = m c^2; where c is the speed of light in vacuum. For a
History and significance. Proposed by Albert Einstein in 1905 as part of special relativity, the mass–energy
Applications and examples. In nuclear binding energy, the mass of a nucleus is less than the sum