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English: Illustration of the SI system of units, with base units and defining constants used to define them: s - the frequency of the caesium transition for the second, kg - the mass of the IPK for the kilogram, mol - the mass in kilograms of an atom of carbon 12 for the mole, cd - the sensitivity of the human eye for the candela,
The SI system after 1983, but before the 2019 revision: Dependence of base unit definitions on other base units (for example, the metre is defined as the distance travelled by light in a specific fraction of a second), with the constants of nature and artefacts used to define them (such as the mass of the IPK for the kilogram).
International vocabulary of metrology - Basic and general concepts and associated terms (VIM), 3rd edition Draft of the ninth SI Brochure (BIPM) The above documentation is transcluded from Template:SI base quantities/doc .
English: Metrological dependencies between the different base units of the SI system of units as agreed to on 16 November 2018. This removed the International Prototype of the Kilogram as the definition. The chart shows the fundamental physical constants used to define the base units:
This category contains template tables that list various SI and SI-related units. For templates which convert to, from or between SI units see Category:Conversion templates . The pages listed in this category are templates .
[1]: 139 The base and coherent derived units of the SI together form a coherent system of units (the set of coherent SI units). A useful property of a coherent system is that when the numerical values of physical quantities are expressed in terms of the units of the system, then the equations between the numerical values have exactly the same ...
International vocabulary of metrology - Basic and general concepts and associated terms (VIM), 3rd edition Draft of the ninth SI Brochure (BIPM) The above documentation is transcluded from Template:SI base quantities/doc .
Date/Time Thumbnail Dimensions User Comment; current: 10:40, 22 February 2020: 600 × 600 (15 KB): The Anome: no, unit positions are consistent with other diagrams, and metre, second and kilogram are at the top because of inter-unit dependencies