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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 zepto- prefix?

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  • by Anonymous on April 18th, 2007

    Anonymous

    zepto- (symbol z) is a prefix in the SI system of units denoting a factor of 10−21.

    Adopted in 1991, it comes from the French sept or Latin septem, meaning seven, since it is equal to 1/10007.

    1000−7 --- 10−21 --- zepto --- z --- Sextillionth Trilliardth --- 0.000 000 000 000 000 000 001

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