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INTERNATIONAL SYSTEM OF UNITS 
international system of units 
Decimal system established by the 11th General Conference on Weights and Measures (GCWM) in 1960 and used by many countries.
Radioactivity of a substance in which one atom disintegrates per second.
Division into 100 parts of the difference between the freezing point of water (0°C) and its boiling point (100°C) at standard atmospheric pressure.
Uniform pressure exerted on a flat surface of 1 m2 with a force of 1 newton.
Quantity of matter equal to the number of atoms in 0.012 kg of carbon 12.
Force required to impart an acceleration of 1 m/s2 to a body having a mass of 1 kg.
Zero Kelvin is equal to minus 273.16°C.
Mass of a platinum prototype that was accepted as the international reference in 1889; it is stored at the International Bureau of Weights and Measures.
Distance traveled by light in a vacuum in 1/299,792,458 of a second.
measurement of electric resistance
measurement of electric potential difference
measurement of luminous intensity
measurement of power
measurement of energy
measurement of electric current
measurement of electric charge
measurement of frequency
measurement of radioactivity
measurement of Celsius temperature
measurement of pressure
measurement of force
measurement of amount of substance
measurement of thermodynamic temperature
measurement of mass
measurement of length
measure of length
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