SI Units

S.I. Units: (International System of Units)
After development of science and technology, it was realized that basic units of length, mass and time were not sufficient. In 1960 the 11th General Conference of Weight and Measures (C.G.P.M.) has approved a combined and systematically constituted system of fundamental and derived units for international use.
This system has seven fundamental units and two supplementary units are as following.
table (1)
table (2)

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