Decimetre: Difference between revisions
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{{Unit of length|m=0.1|accuracy=4}} |
{{Unit of length|m=0.1|accuracy=4}} |
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A '''decimetre''' ([[American English|American spelling]]: '''decimeter''', symbol '''dm''') is a [[Units of measurement|unit]] of [[length]] in the [[metric system]], equal to one tenth of a [[metre]], the current [[International System of Units|SI]] [[SI base unit|base unit]] of length. In simple words there are 10 cm in a decimetre. |
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It can be written in [[scientific notation]]s as 100×10<sup>−3</sup> m (engineering notation) or {{Nowrap|1 E-1 m}} (exponential notation) — meaning {{Nowrap|100 × 1 [[Millimetre|mm]]}} or {{Nowrap|1 m / 10}} respectively. The ''c'' is pronounced as /s/, unlike in [[decametre]]. A cubic decimetre, which is a measurement of volume, is equivalent to one [[litre]] (other than between 1901 and 1964 where there was a [[Litre#History|slight difference between the two]]). |
It can be written in [[scientific notation]]s as 100×10<sup>−3</sup> m (engineering notation) or {{Nowrap|1 E-1 m}} (exponential notation) — meaning {{Nowrap|100 × 1 [[Millimetre|mm]]}} or {{Nowrap|1 m / 10}} respectively. The ''c'' is pronounced as /s/, unlike in [[decametre]]. A cubic decimetre, which is a measurement of volume, is equivalent to one [[litre]] (other than between 1901 and 1964 where there was a [[Litre#History|slight difference between the two]]). |
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Revision as of 23:24, 25 April 2010
A decimetre (American spelling: decimeter, symbol dm) is a unit of length in the metric system, equal to one tenth of a metre, the current SI base unit of length. In simple words there are 10 cm in a decimetre. It can be written in scientific notations as 100×10−3 m (engineering notation) or 1 E-1 m (exponential notation) — meaning 100 × 1 mm or 1 m / 10 respectively. The c is pronounced as /s/, unlike in decametre. A cubic decimetre, which is a measurement of volume, is equivalent to one litre (other than between 1901 and 1964 where there was a slight difference between the two).
The deci- prefix may be rarely used but can be a convenient indicator of scale. For example, "about half a foot", or "about twenty or thirty centimetres" could be expressed as "a couple of decimetres" instead, making the metre and decimetre approximately similar to the yard and foot in magnitude respectively.
See also
- SI
- SI prefix
- deci-
- Metric system
- 1 E-1 m and Orders of magnitude (length)
- Conversion of units, for comparison with other units of length.Almost like a centimeter