Mass–energy equivalence

The mass–energy equivalence formula was displayed on Taipei 101 during the event of the World Year of Physics 2005.

Task Force One, the world's first nuclear-powered task force. Enterprise, Long Beach and Bainbridge in formation in the Mediterranean, 18 June 1964. Enterprise crew members are spelling out Einstein's mass–energy equivalence formula E = mc2 on the flight deck.

In physics, mass–energy equivalence is a concept formulated by Albert Einstein that explains the relationship between mass and energy. It expresses the law of equivalence of energy and mass using the formula

where $E$ is the energy of a physical system, $m$ is the mass of the system, and $c$ is the speed of light in a vacuum (about 7008300000000000000♠3×10 m/s). In words, energy equals mass multiplied by the speed of light squared. Because the speed of light is a very large number in everyday units, the formula implies that any small amount of matter contains a very large amount of energy. Some of this energy may be released as heat and light by chemical or nuclear transformations. This also serves to convert units of mass to units of energy, no matter what system of measurement units used.

单词	Mass energy
释义	Mass energy 原声例句分钟物理 And we so far have no idea why our universe has the mass energy density it does. 到目前为止，我们还不知道为什么我们的宇宙有着恰到好处的质量能量密度。化学 Crash Course If you listened carefully, you learned the difference between the net velocity of a gas and the average velocity of its particles, and that both things have a lot to do with the mass and kinetic energy of the particles. 如果你仔细听，你就会了解到气体的净速度与其粒子的平均速度之间的差异，并且这两者都与粒子的质量和动能有很大关系。英语百科 Mass–energy equivalence In physics, mass–energy equivalence is a concept formulated by Albert Einstein that explains the relationship between mass and energy. It expresses the law of equivalence of energy and mass using the formula where $E$ is the energy of a physical system, $m$ is the mass of the system, and $c$ is the speed of light in a vacuum (about 7008300000000000000♠3×10 m/s). In words, energy equals mass multiplied by the speed of light squared. Because the speed of light is a very large number in everyday units, the formula implies that any small amount of matter contains a very large amount of energy. Some of this energy may be released as heat and light by chemical or nuclear transformations. This also serves to convert units of mass to units of energy, no matter what system of measurement units used.
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Mass energy

Mass–energy equivalence