International System of Units: Difference between revisions
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{| class=infobox style="width: 400px;" | |||
|colspan=3 style="text-align: center;vertical-align: middle;" | '''SI Base Units''' | |||
|- | |||
|style="text-align: center;vertical-align: middle;" | '''Symbol''' || style="text-align: center;vertical-align: middle;" | '''Name''' || style="text-align: center;vertical-align: middle;" | '''Quantity''' | |||
|- | |||
|style="text-align: center;vertical-align: middle;" | s || style="text-align: center;vertical-align: middle;" | [[second]] || style="text-align: center;vertical-align: middle;" | [[time]] | |||
|- | |||
| style="text-align: center;vertical-align: middle;" | m || style="text-align: center;vertical-align: middle;" | [[metre]] || style="text-align: center;vertical-align: middle;" | [[length]] | |||
|- | |||
| style="text-align: center;vertical-align: middle;" | kg || style="text-align: center;vertical-align: middle;" | [[kilogram]] || style="text-align: center;vertical-align: middle;" | [[mass]] | |||
|- | |||
| style="text-align: center;vertical-align: middle;" | A || style="text-align: center;vertical-align: middle;" | [[ampere]] || style="text-align: center;vertical-align: middle;" | [[electric current]] | |||
|- | |||
| style="text-align: center;vertical-align: middle;" | K || style="text-align: center;vertical-align: middle;"| [[kelvin]] ||style="text-align: center;vertical-align: middle;" | [[thermodynamic temperature]] | |||
|- | |||
| style="text-align: center;vertical-align: middle;" | mol || style="text-align: center;vertical-align: middle;" | [[mole (unit)|mole]] || style="text-align: center;vertical-align: middle;" | [[amount of substance]] | |||
|- | |||
| style="text-align: center;vertical-align: middle;" | cd || style="text-align: center;vertical-align: middle;" | [[candela]]|| style="text-align: center;vertical-align: middle;" | [[luminous intensity]] | |||
|- | |||
|colspan=3 | | |||
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|colspan=3 style="text-align: center;vertical-align: middle;" | '''SI Defining Constants''' | |||
|- | |||
| style="text-align: center;vertical-align: middle;" | '''Symbol''' || style="text-align: center;vertical-align: middle;" | '''Name''' || style="text-align: center;vertical-align: middle;" | '''Exact Value''' | |||
|- | |||
| style="text-align: center;vertical-align: middle;" | <math>\Delta\nu_\text{Cs}</math> || style="text-align: center;vertical-align: middle;" | [[Caesium standard|hyperfine transition frequency of Cs]] || style="text-align: center;vertical-align: middle;" | {{val|9192631770|u=Hz}} | |||
|- | |||
| style="text-align: center;vertical-align: middle;" | {{Math|''c''}} || style="text-align: center;vertical-align: middle;" | [[speed of light]] || style="text-align: center;vertical-align: middle;" | {{val|299792458|u=m/s}} | |||
|- | |||
| style="text-align: center;vertical-align: middle;" | {{Math|''h''}} || style="text-align: center;vertical-align: middle;" | [[Planck constant]] || style="text-align: center;vertical-align: middle;" | {{val|6.62607015e-34|u=J.s}} | |||
|- | |||
| style="text-align: center;vertical-align: middle;" | {{Math|''e''}} || style="text-align: center;vertical-align: middle;" | [[elementary charge]] || style="text-align: center;vertical-align: middle;" | {{val|1.602176634e-19|u=C}} | |||
|- | |||
| style="text-align: center;vertical-align: middle;" | {{Math|''k''}} || style="text-align: center;vertical-align: middle;" | [[Boltzmann constant]] || style="text-align: center;vertical-align: middle;" | {{val|1.380649e-23|u=J/K}} | |||
|- | |||
| style="text-align: center;vertical-align: middle;" | {{Math|''N''}}<sub>A</sub> || style="text-align: center;vertical-align: middle;" | [[Avogadro constant]] ||style="text-align: center;vertical-align: middle;" | {{val|6.02214076e23|u=mol-1}} | |||
|- | |||
| style="text-align: center;vertical-align: middle;" | {{Math|''K''<sub>cd</sub>}} || style="text-align: center;vertical-align: middle;" | [[luminous efficacy]] of {{val|540|u=THz}} radiation || style="text-align: center;vertical-align: middle;" | {{val|683|u=lm/W}} | |||
|} | |||
Revision as of 19:16, 10 May 2020
from https://en.wikipedia.org/wiki/International_System_of_Units:
Wiki
| SI Base Units | ||
| Symbol | Name | Quantity |
| s | second | time |
| m | metre | length |
| kg | kilogram | mass |
| A | ampere | electric current |
| K | kelvin | thermodynamic temperature |
| mol | mole | amount of substance |
| cd | candela | luminous intensity |
| SI Defining Constants | ||
| Symbol | Name | Exact Value |
| <math>\Delta\nu_\text{Cs}</math> | hyperfine transition frequency of Cs | Template:Val |
| Template:Math | speed of light | Template:Val |
| Template:Math | Planck constant | Template:Val |
| Template:Math | elementary charge | Template:Val |
| Template:Math | Boltzmann constant | Template:Val |
| Template:MathA | Avogadro constant | Template:Val |
| Template:Math | luminous efficacy of Template:Val radiation | Template:Val |