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  2. Metric prefix - Wikipedia

    en.wikipedia.org/wiki/Metric_prefix

    A metric prefix is a unit prefix that precedes a basic unit of measure to indicate a multiple or submultiple of the unit. All metric prefixes used today are decadic. Each prefix has a unique symbol that is prepended to any unit symbol. The prefix kilo-, for example, may be added to gram to indicate multiplication by one thousand: one kilogram ...

  3. List of metric units - Wikipedia

    en.wikipedia.org/wiki/List_of_metric_units

    The candela (cd) is the unit of luminous intensity. The SI also defines 22 derived units and associated symbols: The hertz (Hz) is equal to one reciprocal second (1 s −1). The radian (rad) is equal to one (1). The steradian (sr) is equal to one (1). The newton (N) is equal to one kilogram-metre per second squared (1 kg⋅m⋅s −2).

  4. International System of Units - Wikipedia

    en.wikipedia.org/wiki/International_System_of_Units

    While not an SI-unit, the litre may be used with SI units. It is equivalent to (10 cm) 3 = (1 dm) 3 = 10 −3 m 3. Many non-SI units continue to be used in the scientific, technical, and commercial literature. Some units are deeply embedded in history and culture, and their use has not been entirely replaced by their SI alternatives.

  5. Metric system - Wikipedia

    en.wikipedia.org/wiki/Metric_system

    The metric system is a decimal -based system of measurement. The current international standard for the metric system is the International System of Units (Système international d'unités or SI), in which all units can be expressed in terms of seven base units: the metre (m), kilogram (kg), second (s), ampere (A), kelvin (K), mole (mol), and ...

  6. Micro- - Wikipedia

    en.wikipedia.org/wiki/Micro-

    Micro (Greek letter μ, mu, non- italic) is a unit prefix in the metric system denoting a factor of 10 −6 (one millionth). [1] It comes from the Greek word μικρός (mikrós), meaning "small". [2] It is the only SI prefix which uses a character not from the Latin alphabet. In Unicode, the symbol is represented by U+03BC μ GREEK SMALL ...

  7. Microscopic scale - Wikipedia

    en.wikipedia.org/wiki/Microscopic_scale

    The British Association for the Advancement of Science committee incorporated the micro- prefix into the newly established CGS system in 1873. [6] The micro- prefix was finally added to the official SI system in 1960, acknowledging measurements that were made at an even smaller level, denoting a factor of 10^-6. [6]

  8. System of units of measurement - Wikipedia

    en.wikipedia.org/wiki/System_of_units_of_measurement

    The current international standard for the metric system is the International System of Units (Système international d'unités or SI). It is a system in which all units can be expressed in terms of seven units. The units that serve as the SI base units are the metre, kilogram, second, ampere, kelvin, mole, and candela.

  9. Unit of volume - Wikipedia

    en.wikipedia.org/wiki/Unit_of_volume

    A unit of volume is a unit of measurement for measuring ... Reference size ... base unit in SI 1 barrel = 0.158 987 294 928 = 158.987294928 = 42 US gallons = 9,702 ...