nLab kilogram (changes)

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The kilogram (kilogramme, kgkg) is a unit of mass. It is 10001000 grams (grammes, gg).

One The kilogram may is soon be defined to by be setting the mass ofNNPlanck constant to be exactlyatoms of the carbon isotope C 12\mathrm{C}^{12}, where NN is 100012\frac{1000}{12} times the Avogadro number. Currently, however, this fact is actually the definition of the Avogadro number; instead, the kilogram is defined as the mass of a certain physical object kept by the BIPM in Paris.

6.62607015×10 −34kg⋅m 2⋅s −1 6.62607015\times 10^{-34} kg\cdot m^2\cdot s^{-1}

and using the previously given definitions of the second and the metre.

The kilogram used to be defined as the mass of a certain physical object, le Grand K, kept by the BIPM in Paris.

References

Last revised on April 2, 2019 at 23:53:52. See the history of this page for a list of all contributions to it.

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