This is the
talk page for discussing improvements to the
SI base unit article. This is not a forum for general discussion of the article's subject. |
Article policies
|
Find sources: Google ( books · news · scholar · free images · WP refs) · FENS · JSTOR · TWL |
Archives:
1Auto-archiving period: 365 days
![]() |
![]() | This ![]() It is of interest to the following WikiProjects: | ||||||||||
|
here's the table I took out in case eveyone wants it back:
Physical quantity | Symbol | Name of SI base unit | Symbol for SI unit | Remarks |
---|---|---|---|---|
length | metre | m | One metre is defined as the distance light travels in a vacuum in 1/299792458 second. This standard was adopted in 1983, when the speed of light in vacuum was defined to be precisely 299792458 m/s. | |
mass | kilogram | kg | One kilogram is defined to be the mass of a specific cylinder of platinum-iridium alloy, kept at the International Bureau of Weights and Measures (near Paris). | |
time | second | s | One second is defined as the time required for 9192631770 cycles of a hyperfine transition in cesium 133. This definition was adopted in 1967. | |
electric current | ampere | A | ||
thermodynamic temperature | kelvin | K | ||
amount of substance | mole | mol | ||
luminous intensity | candela | cd |
Ampere, a base unit, is defined in terms of a Newton, which is not a base unit?
Please edit this into the article 02:55, 27 Jul 2004 (UTC) what it means the MASS?
See Wikipedia talk:Featured articles#2019 redefinition of SI base units. -- Guy Macon ( talk) 15:29, 20 April 2019 (UTC)
Since Boltzmann's constant is dimensionless (although mosts chemists and too many physicists seem to be unaware of the fact) the Kelvin is in fact equivalent to (a rather small amount of) energy, which is expressible in the base constants mass, length, and time. 2A01:CB0C:CD:D800:4507:4B4B:7EE:825F ( talk) 15:57, 14 June 2021 (UTC)