International System of Units - Wikipedia
https://en.m.wikipedia.org/wiki/International_System_of_Units
WebThe SI comprises a coherent [o] system of units of measurement starting with seven base units, which are the second (symbol s, the unit of time ), metre (m, length ), kilogram (kg, mass ), ampere (A, electric current ), kelvin (K, thermodynamic temperature ), mole (mol, amount of substance ), and candela (cd, luminous intensity ).
DA: 69 PA: 84 MOZ Rank: 55