Billionth
From Handwiki One billionth is the reciprocal of a billion, which means it has one of two definitions depending on whether the long scale or short scale definition is being used.[1]
Short scale
In the short (or United States ) scale, a billionth is equal to 0.000 000 001, or 1 x 10−9 in scientific notation or standard form. The prefix for this number is nano, and is abbreviated as "n" (for example, in electronics, one nanofarad would be written as 1 nF).[2]
Long scale
In the long (or United Kingdom ) scale, a billionth is equal to 0.000 000 000 001, or 1 x 10−12 in scientific notation or standard form. The prefix for this number is pico-, and is abbreviated as "p" (for example, in electronics, one picofarad would be written as 1 pF).[3]
See also
- Ordinal number
References
- ↑ Gardner, J. W. (April 6, 1961), "How many is a billion?", New Scientist: 888, https://books.google.com/books?id=v4B2NNxjtloC&pg=PA888.
- ↑ Carstairs-McCarthy, Andrew (2002), An Introduction to English Morphology: Words and Their Structure, Edinburgh University Press, pp. 109–110, ISBN 9780748613267, https://books.google.com/books?id=yoNqhym0u2sC&pg=PA109.
- ↑ Bray, Charles (2001), Dictionary of Glass: Materials and Techniques, University of Pennsylvania Press, p. 243, ISBN 9780812236194, https://books.google.com/books?id=KbZkxDyeG18C&pg=PA243.
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Categories: [Fractions (mathematics)] [Ordinal numbers]
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