the prefix femto stands for
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Explanation:
Femto- (symbol f) is a unit prefix in the metric system denoting a factor of 10−15. It was added in 1964 to the SI. It is derived from the Danish word femten, meaning "fifteen".
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Explanation:
Femto- (symbol f) is a unit prefix in the metric system denoting a factor of 10−15. It was added in 1964 to the SI.[1] It is derived from the Danish word femten, meaning "fifteen".
Examples of use:
The HIV-1 virus has the mass of about 1 x 10−15 g or 1 fg. Orders of magnitude (mass)
a proton has a diameter of about 1.6 to 1.7 femtometres
More examples available.
The femtometre shares the unit symbol (fm) with the older non-SI unit fermi, to which it is equivalent. The fermi, named in honour of Enrico Fermi, is often encountered in nuclear physics.
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