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international system of units click to hear : international system of units

Decimal system established by the 11th General Conference on Weights and Measures (GCWM) in 1960 and used by many countries.
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See international system of units in : french | spanish
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 becquerel degree Celsius pascal mole newton kelvin kilogram meter

measurement of radioactivity click to hear : measurement of radioactivity

measurement of Celsius temperature click to hear : measurement of Celsius temperature

measurement of pressure click to hear : measurement of pressure

measurement of force click to hear : measurement of force

measurement of amount of substance click to hear : measurement of amount of substance

measurement of thermodynamic temperature click to hear : measurement of thermodynamic temperature

measurement of mass click to hear : measurement of mass

measurement of length click to hear : measurement of length

becquerel click to hear : becquerel

Radioactivity of a substance in which one atom disintegrates per second.

degree Celsius click to hear : degree Celsius

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.

pascal click to hear : pascal

Uniform pressure exerted on a flat surface of 1 m2 with a force of 1 newton.

mole click to hear : mole

Quantity of matter equal to the number of atoms in 0.012 kg of carbon 12.

newton click to hear : newton

Force required to impart an acceleration of 1 m/s2 to a body having a mass of 1 kg.

kelvin click to hear : kelvin

Zero degrees Kelvin is equal to minus 273.16°C.

kilogram click to hear : kilogram

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.

meter click to hear : meter

Distance traveled by light in a vacuum in 1/299,792,458 of a second.