英语词汇“energy density”的英英意思、用法、释义、翻译、读音、例句、短语、词组-英语词典

energy density n. Physics and Engineering (a) the quantity of energy per unit volume stored in a given material or object, or present in a given space (also called volume (or volumetric) energy density); (b) the quantity of energy per unit mass (or weight) stored in a given material or object (also called gravimetric energy density or specific energy; cf. specific adj. and n. Compounds).Frequently used to express the efficiency (by volume or weight) of a fuel as a source of energy, or of a battery, flywheel, etc., as a device for storing energy. When relativistic effects are taken into account, energy density includes energy in the form of matter.

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1896 Physical Rev. 3 472 Maxwell does not say anything about the energy density according to Ampere's theory of elementary current magnets.

1933 A. W. Barton Text Bk. Heat xv. 352 The number of ergs of radiation in 1 c.c. of [enclosure] A..is called the energy density of the radiation in the enclosure.

1973 Amer. Sci. Jan. 70/2 Recently, advances in energy storage in flywheels have been reported by Weatherbee and Rabenhorst, who anticipate storage of 30 W hrs/lb, an energy density that would make them competitive with present day storage batteries.

1992 Energy Conservation Devel. 50 in U.S. Congress. Serial Set (102nd Congr., 2nd Sess.: Senate Hearing 637) The energy density of gasoline is more than 350 times that of a lead acid battery system per kilogram of weight.

2011 B. E. Cox & J. R. Forshaw Quantum Universe xi. 22 Such a large and negative energy density in every square metre of empty space should..generate a devastating expansion of the Universe.

单词	energy density
释义	> as lemmas energy density energy density n. Physics and Engineering (a) the quantity of energy per unit volume stored in a given material or object, or present in a given space (also called volume (or volumetric) energy density); (b) the quantity of energy per unit mass (or weight) stored in a given material or object (also called gravimetric energy density or specific energy; cf. specific adj. and n. Compounds).Frequently used to express the efficiency (by volume or weight) of a fuel as a source of energy, or of a battery, flywheel, etc., as a device for storing energy. When relativistic effects are taken into account, energy density includes energy in the form of matter. ΚΠ 1896 Physical Rev. 3 472 Maxwell does not say anything about the energy density according to Ampere's theory of elementary current magnets. 1933 A. W. Barton Text Bk. Heat xv. 352 The number of ergs of radiation in 1 c.c. of [enclosure] A..is called the energy density of the radiation in the enclosure. 1973 Amer. Sci. Jan. 70/2 Recently, advances in energy storage in flywheels have been reported by Weatherbee and Rabenhorst, who anticipate storage of 30 W hrs/lb, an energy density that would make them competitive with present day storage batteries. 1992 Energy Conservation Devel. 50 in U.S. Congress. Serial Set (102nd Congr., 2nd Sess.: Senate Hearing 637) The energy density of gasoline is more than 350 times that of a lead acid battery system per kilogram of weight. 2011 B. E. Cox & J. R. Forshaw Quantum Universe xi. 22 Such a large and negative energy density in every square metre of empty space should..generate a devastating expansion of the Universe. extracted from energyn. < as lemmas
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