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abstraction > mathematical concept > unit > SI unit > derived SI unit > named derived SI unit

named derived SI unit
subject			fact

named derived SI unit	is a kind of derived SI unit
derived SI unit	has unit defined in terms of derived SI unit via a system of quantity equations
	has base unit defined in terms of the seven SI base units via a system of quantity equations
SI unit	is an acronym for Syteme Internationale
unit	has historical origin
	represents

Kinds of named derived SI unit :

• becquerel (9 facts) (Bq) - Unit of radioactivity; 1 becquerel represents one disintegration, or other nuclear transformation, per second.
• Celsius (12 facts) (°C, Centigrade) - A mercury-in-glass temperature scale. The zero of the scale represents the melting point of ice and the boiling point of water is taken to be 100 degrees.
• coulomb (8 facts) (C) - The practical and the SI unit of charge. It is the quantity of electricity transported in one second by a current of one ampere. From 1908 to 1948 the international coulomb, derived from the international ampere, was in use. Like the other international units it was replaced by the absolute unit on 1 January 1948. The name coulomb was given to the unit at the first meeting of the IEC in Paris in 1881. At this meeting two of the five units which were given definitions were named after French scientists. These were the ampere (A. M. Ampère 1775-1836) and the coulomb (C. A. Coulomb 1736-1806). (1 international coulomb = 0.99985 absolute coulomb.), Unit of charge.
• farad (5 facts) (F)
• gray (6 facts) (Gy)
• henry (5 facts) (H)
• hertz (5 facts) (Hz) - A unit of frequency equal to one cycle (or wave) per second.
• joule (17 facts) (J) - Unit of work which is equal to a force of one newton acting over a distance of one metre in the direction of the force. It was recognized by the IEC in 1889. The specific heat of water at 15 °C is 4185.5 joule (kg °C)^-1, a figure previously always associated with J, the mechanical equivalent of heat., Unit of energy, work, or quantity of heat. 1 J is equal to a force of 1 newton acting over a distance of 1 meter. 1 J = 10⁷ ergs.
• katal (4 facts) (kat)
• lumen (5 facts) (lm)
• lux (5 facts) (lx)
• newton (6 facts) (N) - The SI derived unit of force, equal to the force necessary to give an acceleration of 1 meter per second² to a mass of 1 kg.
• ohm (5 facts) (Ω)
• pascal (9 facts) (Pa) - The derived SI unit of pressure.
• radian (9 facts) (rad) - Unit of angular measure equal to the angle subtended at the centre of a circle by an arc the length of which is equal to the radius. There are 2π radians in a circle. The angle π/4 is called an octant and a thousandth of a radian is sometimes called a mil, which is equal to 3 minutes 26.5 seconds of arc., A measure of angular distance; 2π radians equals 360 degrees.
• siemens (8 facts) (S, reciprocal ohm) - The SI unit of electrical conduction.
• sievert (6 facts) (Sv)
• steradian (9 facts) (sr, sr, Ω₀) - Unit of solid (three-dimensional) angular measure. One steradian is equal to the angle subtended at the centre of a sphere by an area of surface equal to the square of the radius. The surface of a sphere subtends an angle of 4π steradians at its centre.
• tesla (9 facts) (T) - The derived SI unit of magnetic flux density.
• volt (5 facts) (V)
• watt (7 facts) (W) - Unit of power.
• weber (7 facts) (Wb) - The derived SI unit of magnetic flux.