Measurement unit that is adopted by convention for a base quantity.
The International System of Units (SI) defines seven units of measure as a basic set from which all other SI units are derived. These SI base units and their physical quantities are:
- metre (m) for length
- kilogram (kg) for mass
- second (s) for time
- ampere (A) for electric current
- kelvin (K) for temperature
- candela (cd) for luminous intensity
- mole (mol) for the amount of substance.
The seven SI base units and the interdependency of their definitions
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