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dimensionless number

   Also found in: Encyclopedia, Wikipedia 0.01 sec.
dimensionless number  (d-mnshn-ls)
A number representing a property of a physical system, but not measured on a scale of physical units (as of time, mass, or distance). Drag coefficients and stress, for example, are measured as dimensionless numbers.


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The coefficient of variation is a dimensionless number expressing the standard deviation (SD) as a proportion of the mean (X), using the formula [(SD/[bar]X) x 100].
Variability in spatiotemporal gait characteristics over the course of ... by MacKay-Lyons, Marilyn / Physical Therapy
This parameter is a dimensionless number which measures the within-aggregate void volume relative to the volume of carbon in the aggregate.
Influence of carbon black morphology and surface activity on ... by McDonald, G.C. / Rubber World
Their investigation into the problem led them to the application of criteria functions (certain combinations of thermal parameters) and dimensionless numbers as they relate to solidification modeling to predict properties as well as faults in castings.
Sessions focus on environment, new computer applications by Modern Casting
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