| 单词 | specific energy |
| 释义 | > as lemmasspecific energy specific energy n. [partly (in sense (a)) after German specifische Energie (1837 or earlier; now spezifische Energie ); partly (in sense (b)) after French énergie spécifique (1889 or earlier)] (a) Physiology the specific activity or function of a given nerve, cell, etc. (now historical); (b) Physics the quantity of energy, (formerly) per unit volume or (now) per unit mass, which is stored in a given material or object (cf. energy density n. at energy n. Compounds 4). ΚΠ 1844 R. Willis tr. R. Wagner Elements Physiol. iii. §290. 530 When we speak of hearing in a physiological sense, we understand an excitement of the specific energy [Ger. spezifischen Energie] of the acoustic or seventh pair of cerebral nerves. 1890 Sci. Amer. Suppl. 31 May 12015/2 Whatever be the degree of attenuation [with sulphuric acid], the electric energy obtained per litre of liquid is sensibly the same... The attenuation may be obtained with other products..; but the specific energy [Fr. l'énergie spécifique] is thus reduced. 1893 Nature 14 Sept. 472/1 The process of lymphatic absorption..is in great measure due to the specific energy of cells. 1898 Electr. Rev. 3 June 786/2 Accumulators intended for electro-mobiles should above all possess..a high specific energy (watt-hours per kilogramme of total weight). 1963 Astrophysical Jrnl. 138 182 Assume that the specific energy is constant and that the cosmic pressure is zero during those stages of the expansion [of the universe]. 2010 L. Garey tr. M. Meulders Helmholtz ix. 144 Helmholtz..was convinced that understanding sprang from experience, whereas for Müller specific energy was obviously innate. 2014 C. Hall Materials: Very Short Introd. iii. 64 The specific energy of cellulose (and hence of wood) is only 17 MJ/kg, because the cellulose polymers already have a lot of oxygen in them, so are partially pre-oxidized. < as lemmas |
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