English Engineering units
Some fields of engineering in the United States use a system of measurement of physical quantities known as the English Engineering units.[1] The system is based on English units of measure.
Definition
The English Engineering units is a set of consistent units still in use in the United States. The set is defined by the following units,[2] with a comparison to the standard units based on the International System of Units.[3]
| Dimension | English Engineering unit | SI unit |
|---|---|---|
| time | second (sec) | second (s) |
| length | foot (ft) | metre (m) |
| mass | pound mass (lbm) | kilogram (kg) |
| force | pound force (lbF) | newton (N) |
| temperature | degree Fahrenheit (°F) | degree Celsius (°C) |
| absolute temperature | degree Rankine (°R) | kelvin (K) |
Units for other physical quantities are derived from this set as needed.
A similar system is termed British engineering units by Halliday and Resnick, a system that uses the slug as the unit of mass.[4]
See also
References
- ↑ Comings, E. W. (1940). "English Engineering Units and Their Dimensions". Ind. Eng. Chem. 32 (7): 984–987. doi:10.1021/ie50367a028.
- ↑ R. Zucker, O. Biblarz (2002). Fundamentals of Gas Dynamics. Hoboken, New Jersey: John Wiley & Sons, Inc. ISBN 0-471-05967-6.
- ↑ International Bureau of Weights and Measures (2006), The International System of Units (SI) (PDF) (8th ed.), ISBN 92-822-2213-6
- ↑ Halliday, David; Resnick, Robert (1974). Fundamentals of Physics (revised printing ed.). New York: Wiley. pp. 35, 68–69.
This article is issued from Wikipedia - version of the 7/16/2015. The text is available under the Creative Commons Attribution/Share Alike but additional terms may apply for the media files.