| 单词 | point mass |
| 释义 | > as lemmaspoint mass point mass n. Physics a mass regarded as concentrated in a mathematical point, without spatial extent. ΘΚΠ the world > matter > physics > atomic physics > [noun] > atomic mass > concentrated mass point mass1900 mass-point1911 1900 Science 21 Sept. 430/1 The planets being treated as point-masses, each subject to the gravitational attraction of the other bodies. 1955 W. Heisenberg in W. Pauli Niels Bohr & Devel. Physics 17 For Bohm, the particles are ‘objectively real’ structures, like the point masses of classical mechanics. 1989 J. Silk Big Bang (rev. ed.) vi. 119 Superstrings, being singularity-free, unlike point masses, provide the basis for a radical new theory of quantum gravity. < as lemmas |
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