mass-energy

noun

1. mass and energy considered as equivalent and interconvertible, according to the theory of relativity

Example Sentences

He also says the numbers don’t seem to add up: Dark energy is known to make up 70 percent of the mass-energy of the universe, while black holes are a mere fraction of the ordinary matter, which constitutes less than 5 percent of the universe.

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According to the Standard Model and previous mass measurements, the W boson should weigh about 80.357 billion electron volts, the unit of mass-energy favored by physicists.

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In the late 1920s and early 1930s — two decades after Einstein’s four path-blazing papers of 1905: mass-energy equivalence, etc. — he helped to design and patent a refrigerator using less hazardous coolants than were then used in many refrigerators.

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Altogether this displaces ‘ordinary’ matter - the protons, neutrons, electrons and other detectable species - into a minority bucket that contains around 5% of the total mass-energy of the universe.

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To explain observations of galaxies inconsistent with general relativity, the existence of dark matter was posited as an unknown and invisible form of matter calculated to make up more than a quarter of all mass-energy content in the universe—assuming, of course, the framework is universally valid.

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