This MedLibrary.org supplementary page on Picometre is provided directly from the open source Wikipedia as a service to our readers. Please see the note below on authorship of this content, as well as the Wikipedia usage guidelines. To search for other content from our encyclopedia supplement, please use the form below:
Related Sponsors
A picometre (American spelling: picometer, symbol pm) is a unit of length in the metric system, equal to one trillionth (1/1,000,000,000,000) of a metre, which is the current SI base unit of length. It can be written in scientific notation as 1×10−12 m (engineering notation) or 1 E-12 m (exponential notation) — both meaning 1 m / 1,000,000,000,000.
It equals a millionth of a micrometre (formerly called a micron), and was formerly called micromicron or bicron. (The symbol µµ was apparently used both for this[1] and for the nanometre.)
It equals a hundredth of an Ångström, an internationally recognized non-SI unit of length.
| Multiples | Name | deca- | hecto- | kilo- | mega- | giga- | tera- | peta- | exa- | zetta- | yotta- | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Symbol | da | h | k | M | G | T | P | E | Z | Y | ||
| Factor | 100 | 101 | 102 | 103 | 106 | 109 | 1012 | 1015 | 1018 | 1021 | 1024 | |
| Subdivisions | Name | deci- | centi- | milli- | micro- | nano- | pico- | femto- | atto- | zepto- | yocto- | |
| Symbol | d | c | m | µ | n | p | f | a | z | y | ||
| Factor | 100 | 10−1 | 10−2 | 10−3 | 10−6 | 10−9 | 10−12 | 10−15 | 10−18 | 10−21 | 10−24 | |
See also
- 1 E-12 m
- SI
- SI prefix
- Metric system
- Orders of magnitude (length)
- Conversion of units, for comparison with other units of length.
References
- ^ How Many? A Dictionary of Units of Measurement; Russ Rowlett and the University of North Carolina at Chapel Hill; http://www.unc.edu/~rowlett/units/dictB.html
|
|||||
Wikipedia content modification information:
- This page was last modified on 16 August 2008, at 05:12.
Wikipedia Authorship and Review
Wikipedia content provided here is not reviewed directly by MedLibrary.org. Wikipedia content is authored by an open community of volunteers and is not produced by or in any way affiliated with MedLibrary.org.
Wikipedia Usage Guidelines
This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article on "Picometre".
The URL for this specific entry is:
All Wikipedia text is available under the terms of the GNU Free Documentation License. (See Copyrights for details). Wikipedia® is a registered trademark of the Wikimedia Foundation, Inc.