Dimensionless quantity

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In dimensional analysis, a dimensionless abundance or abundance of ambit one is a abundance after an associated concrete dimension. It is appropriately a "pure" number, and as such consistently has a ambit of 1.[1] Dimensionless quantities are broadly acclimated in mathematics, physics, engineering, economics, and in accustomed activity (such as in counting). Numerous acclaimed quantities, such as ПЂ, e, and П†, are dimensionless. By contrast, non-dimensionless quantities are abstinent in units of length, area, time, etc.
Dimensionless quantities are generally authentic as articles or ratios of quantities that are not dimensionless, but whose ambit abolish out if their admiral are multiplied. This is the case, for instance, with the engineering strain, a admeasurement of deformation. It is authentic as change in length, disconnected by antecedent length, but back these quantities both accept ambit L (length), the aftereffect is a dimensionless quantity.
Contents [hide]
1 Properties
2 Buckingham ПЂ theorem
2.1 Example
3 Standards efforts
4 Examples
5 Dimensionless concrete constants
6 List of dimensionless quantities
7 See also
8 References
9 External links