“kilogram”的概念、定义、翻译、参考文献-科学参考

kilogram

Physics

Symbol kg. The SI unit of mass, previously defined as a mass equal to that of the international platinum–iridium prototype kept by the International Bureau of Weights and Measures at Sèvres, near Paris; from 20 May 2019 it is defined in terms of the Planck constant.

Mathematics

In SI units, the base unit used for measuring mass, abbreviated to ‘kg’. One kilogram is approximately the mass of 1000cm³ of water, though from 2019 it has been precisely defined in terms of the Planck constant.

Chemistry

The SI unit of mass. Until May 2019 the kilogram was defined as a mass equal to that of the international platinum–iridium prototype kept by the International Bureau of Weights and Measures at Sèvres, near Paris. It is now defined in terms of the Planck constant, which is set at exactly 6.626 07015 × 10⁻³⁴ kg m² s^-1. This means that the kilogram is defined in terms of the metre and the second. The new definition was chosen because of the great accuracy with which it is now possible to measure the Planck constant.

Chemical Engineering

The SI unit of mass. Since May 2019, it is related to the equivalent mass of the energy of a photon given its frequency, via the Planck constant and is dependent on the definitions of the metre and the second. The previous definition was the mass of the international platinum-iridium cylinder kept by the International Bureau of Weights and Measures at Sèvres, near Paris.

Biology

Symbol kg. The SI unit of mass currently defined as a mass equal to that of the international platinum-iridium prototype kept by the International Bureau of Weights and Measures at Sèvres, near Paris; from 20 May 2019 it was defined in terms of the Planck constant.

单词	kilogram
释义	kilogram Physics Symbol kg. The SI unit of mass, previously defined as a mass equal to that of the international platinum–iridium prototype kept by the International Bureau of Weights and Measures at Sèvres, near Paris; from 20 May 2019 it is defined in terms of the Planck constant. Mathematics In SI units, the base unit used for measuring mass, abbreviated to ‘kg’. One kilogram is approximately the mass of 1000cm³ of water, though from 2019 it has been precisely defined in terms of the Planck constant. Chemistry The SI unit of mass. Until May 2019 the kilogram was defined as a mass equal to that of the international platinum–iridium prototype kept by the International Bureau of Weights and Measures at Sèvres, near Paris. It is now defined in terms of the Planck constant, which is set at exactly 6.626 07015 × 10⁻³⁴ kg m² s^-1. This means that the kilogram is defined in terms of the metre and the second. The new definition was chosen because of the great accuracy with which it is now possible to measure the Planck constant. Chemical Engineering The SI unit of mass. Since May 2019, it is related to the equivalent mass of the energy of a photon given its frequency, via the Planck constant and is dependent on the definitions of the metre and the second. The previous definition was the mass of the international platinum-iridium cylinder kept by the International Bureau of Weights and Measures at Sèvres, near Paris. Biology Symbol kg. The SI unit of mass currently defined as a mass equal to that of the international platinum-iridium prototype kept by the International Bureau of Weights and Measures at Sèvres, near Paris; from 20 May 2019 it was defined in terms of the Planck constant.
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