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单词 Massic energy
释义

Massic energy

中文百科

能量密度 Energy density

(重定向自Massic energy)
部分物质的能量密度与比能表图(上述物质有氧参与的氧化释能都不包括氧的质量和体积)

能量密度是指在一定的空间或质量物质中储存能量的大小。如果是按质量来判定一般被称为比能。

英语百科

Energy density 能量密度

(重定向自Massic energy)
Selected energy densities plot

Energy density is the amount of energy stored in a given system or region of space per unit volume or mass, though the latter is more accurately termed specific energy. Often only the useful or extractable energy is measured, which is to say that chemically inaccessible energy such as rest mass energy is ignored. In cosmological and other general relativistic contexts, however, the energy densities considered are those that correspond to the elements of the stress–energy tensor and therefore do include mass energy as well as energy densities associated with the pressures described in the next paragraph.

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