Base quantities
From EverybodyWiki Bios & Wiki
no
a base quantity[lower-alpha 1] is a type of quantity defined as something that is based on unchanging values in the universe[1][2][3][4], when base quantity is mentioned, it usually means SI base unit, which is the base units of our universe as defined by the SI corporation and is used world-wide as the default units of measurement [5][6][7][8], below is a list of all the SI base units, for more unit's in the si system, see list of physical quantities.
| name | symbol | definition |
|---|---|---|
| Second | s | a unit used to measure time[9][10][11][12] |
| Metre | m | a unit used to measure a the distance between two points, also called a meter in american english[13][14][15][16] |
| Kilogram | kg | a unit used to measure the mass of object but can also be used as a unit of weight[17][18][19][20][21] |
| ampere | a | a unit used to measure electric current[lower-alpha 2][22][23][24][25] |
| kelvin | k | a unit used to measure thermodynamic temperature[lower-alpha 3][26][27][28][29][30] |
| mole | mol | a unit used to measure the amount of substance of something, also sometimes called a mol[31][32][33][34] |
| candela | cd | a unit used to measure the density of light in specific direction[35][36][37][38][39][40] |
References
- ↑ "https://byjus.com/physics/si-units-list/". BYJUS. Retrieved 2025-12-03. External link in
|title=(help) - ↑ "Base Quantity & SI Units | Mini Physics - Free Physics Notes". 2011-12-16. Retrieved 2025-12-03.
- ↑ "Definitions of SI Base Units". NIST. 2019-05-29.
- ↑ "SI base units". BIPM. Retrieved 2025-12-03.
- ↑ "International System of Units | Measurement, Conversion & History | Britannica". Encyclopedia Britannica. Archived from the original on 2025-09-25. Retrieved 2025-12-03. Unknown parameter
|url-status=ignored (help) - ↑ "SI base units". BIPM. Retrieved 2025-12-03.
- ↑ "SI Units". NIST. 2010-04-12.
- ↑ "https://byjus.com/physics/si-units-list/". BYJUS. Retrieved 2025-12-03. External link in
|title=(help) - ↑ "Second: Introduction". NIST. 2019-04-09.
- ↑ "second". dictionary.cambridge.org. 2025-11-26. Retrieved 2025-12-03.
- ↑ "Second | Measurement, Timekeeping, Clock | Britannica". Encyclopedia Britannica. Archived from the original on 2025-08-29. Retrieved 2025-12-03. Unknown parameter
|url-status=ignored (help) - ↑ "Definition of SECOND". www.merriam-webster.com. 2025-11-29. Retrieved 2025-12-03.
- ↑ "Metre (m) | Britannica". Encyclopedia Britannica. Archived from the original on 2025-07-01. Retrieved 2025-12-03. Unknown parameter
|url-status=ignored (help) - ↑ "meter". dictionary.cambridge.org. 2025-11-26. Retrieved 2025-12-03.
- ↑ "Definition of METER". www.merriam-webster.com. 2025-11-29. Retrieved 2025-12-03.
- ↑ "Meter". NIST. 2019-05-09.
- ↑ "kilogram (kg) - NPL". www.npl.co.uk. Retrieved 2025-12-03.
- ↑ "Kilogram: Introduction". NIST. 2018-05-14.
- ↑ "Kilogram | mass, weight, SI unit | Britannica". Encyclopedia Britannica. Archived from the original on 2025-08-22. Retrieved 2025-12-03. Unknown parameter
|url-status=ignored (help) - ↑ "- kilogram". BIPM. Retrieved 2025-12-03.
- ↑ "Kilogram | mass, weight, SI unit | Britannica". Encyclopedia Britannica. Archived from the original on 2025-08-22. Retrieved 2025-12-03. Unknown parameter
|url-status=ignored (help) - ↑ "ampere (A) - NPL". www.npl.co.uk. Retrieved 2025-12-03.
- ↑ "Ampere | Definition & Unit | Britannica". Encyclopedia Britannica. Archived from the original on 2025-06-09. Retrieved 2025-12-03. Unknown parameter
|url-status=ignored (help) - ↑ "- ampere". BIPM. Retrieved 2025-12-03.
- ↑ "Definition of AMPERE". www.merriam-webster.com. Retrieved 2025-12-03.
- ↑ "kelvin". dictionary.cambridge.org. 2025-11-26. Retrieved 2025-12-03.
- ↑ "Kelvin: Introduction". NIST. 2018-05-14.
- ↑ "- kelvin". BIPM. Retrieved 2025-12-03.
- ↑ "Kelvin (K) | Definition & Facts | Britannica". Encyclopedia Britannica. Archived from the original on 2025-09-22. Retrieved 2025-12-03. Unknown parameter
|url-status=ignored (help) - ↑ "Definition of KELVIN". www.merriam-webster.com. 2025-11-14. Retrieved 2025-12-03.
- ↑ "mole (mol) - NPL". www.npl.co.uk. Retrieved 2025-12-03.
- ↑ "- mole". BIPM. Retrieved 2025-12-03.
- ↑ "Definition of MOL". www.merriam-webster.com. Retrieved 2025-12-03.
- ↑ "Mole | Definition, Number, & Facts | Britannica". Encyclopedia Britannica. Archived from the original on 2025-08-30. Retrieved 2025-12-03. Unknown parameter
|url-status=ignored (help) - ↑ "SI Units – Luminous Intensity". NIST. 2011-06-21.
- ↑ "Luminous intensity | Candlepower, Lumens, Photometry | Britannica". Encyclopedia Britannica. Archived from the original on 2025-05-23. Retrieved 2025-12-03. Unknown parameter
|url-status=ignored (help) - ↑ "Candela". NIST. 2019-05-16.
- ↑ "candela (cd) - NPL". www.npl.co.uk. Retrieved 2025-12-03.
- ↑ "Definition of CANDELA". www.merriam-webster.com. 2025-11-04. Retrieved 2025-12-03.
- ↑ "Candela (cd) | Britannica". Encyclopedia Britannica. Archived from the original on 2025-08-24. Retrieved 2025-12-03. Unknown parameter
|url-status=ignored (help)
Notes
- ↑ note: a base quantity is different from SI base units as SI base units can only describe our universe but base quantities can describe in universe that has fundamental constants that can be measured.
- ↑ electric current is the flow of charged particles through a object or space.
- ↑ thermodynamic temperature is a temperature scale that starts from absolute zero to the point when particles become a minimal thermal potion.
This article "Base quantities" is from Wikipedia. The list of its authors can be seen in its historical and/or the page Edithistory:Base quantities. Articles copied from Draft Namespace on Wikipedia could be seen on the Draft Namespace of Wikipedia and not main one.
