what is S.I system of unit.
The SI system is the International System of units. It is a worldwide accepted metric system.
SI Base Quantities and Units
Length − metre (m)
Mass − kilogram (kg)
Time − second (s)
Electric current − ampere (A)
Thermodynamic temperature − kelvin (K)
Amount of substance − mole (mol)
Luminous intensity − candela (cd)