| 单词 | flux of force |
| 释义 | > as lemmasflux of force a. The rate of flow of any fluid across a given area; the amount which crosses an area in a given time; it is thus a vector referred to unit area. Also used with reference to other forms of matter and energy that can be regarded as flowing, such as radiant energy, particles, etc. line of flux, see quot. 18812. flux of force, see quot. 1885. ΘΚΠ the world > matter > physics > energy or power of doing work > [noun] > transmission of energy > rate of flow of energy flux1863 the world > matter > physics > electromagnetic radiation > electricity > electrically induced magnetism > [noun] > measure of flux of force1863 skin depth1935 the world > matter > physics > electromagnetic radiation > heat > [noun] > emission or diffusion > energy produced by > as flow flux1863 radiant power1863 radiant flux1896 radiance1917 the world > matter > physics > atomic nucleus > nuclear fission > nuclear fuel > [noun] > thermal flux flux1947 the world > matter > physics > electromagnetic radiation > solar radiation > [noun] > emitting radiation or particles reradiation1827 emission1955 flux1971 1863 J. Tyndall Heat vii. §268 The line of flux..was parallel to the fibre. 1881 J. C. Maxwell Treat. Electr. & Magn. (1892) I. 11 The flux of heat in any direction at any point of a solid body may be defined as the quantity of heat which crosses a small area drawn perpendicular to that direction divided by that area and by the time. 1881 J. C. Maxwell Treat. Electr. & Magn. (1892) I. 13 If two of these surfaces intersect, their line of intersection is a line of flux. 1882 G. M. Minchin Uniplanar Kinematics 159 The flux across each end of the tube would be zero. 1885 H. W. Watson & S. H. Burbury Math. Theory Electr. & Magn. I. 102 Flux of Force..This product, from its analogy to the flux of a fluid flowing through a small tube with velocity u = F, is called the flux of force across d S. 1911 Encycl. Brit. XXI. 525/2 Across this surface there will pass a definite amount of radiant energy, in other words a definite total luminous flux. 1947 Science 9 May 491/1 A graphite uranium pile, a ‘hot’ laboratory.., still another pile with 100 times the neutron flux of the first, [etc.]. 1957 New Scientist 23 May 32/2 The thermal neutron flux in such a reactor will be on the average about 2 ×1013 neutrons per square centimetre per second. 1963 R. W. Ditchburn Light (ed. 2) x. 397 A flux of one watt of radiation of this wavelength constitutes a luminous flux of 692 lumens. 1964 C. J. Maiden in LeGalley & McKee Space Explor. ix. 242 Recently spacecraft have become available to make direct measurements of the flux of micrometeorites in space. 1967 E. U. Condon & H. Odishaw Handbk. Physics (ed. 2) ix. 280 A definite flux of (1·5 ±0·8) × 10—4 per cm2 per sec for γ rays of a few hundred MeV has been reported..from the direction of the constellation Cygnus. 1971 Nature 7 May 11/1 The flux of hydrogen atoms in the solar wind. < as lemmas |
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