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by Tondoteottotote on July 29th, 2005

Tondoteottotote

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What is the origin, the symbol, and the factor of the atto- prefix?

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  • by Quirkie on September 26th, 2005

    Quirkie

    "atto- (symbol a) is an SI prefix to a unit and means that it is 10^-18 times this unit. Examples are one attosecond or one attometre (U.S. spelling attometer).

    Adopted in 1964, it comes from the Danish atten, meaning eighteen"

    From http://en.wikipedia.org/wiki/Atto

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