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In mathematics, a rate is the quotient of two quantities, often represented as a fraction. [1] If the divisor (or fraction denominator) in the rate is equal to one expressed as a single unit, and if it is assumed that this quantity can be changed systematically (i.e., is an independent variable), then the dividend (the fraction numerator) of the rate expresses the corresponding rate of change ...
the sensitivity to interest rate in mathematical finance; density (mass or charge per unit volume; may be replaced by the capital form of the Latin letter D) [57] resistivity; the shape and reshape operators in APL (in the form ⍴) the rename operator in relational algebra; the plastic ratio; Rho meson
Conversion of units is the conversion of the unit of measurement in which a quantity is expressed, typically through a multiplicative conversion factor that changes the unit without changing the quantity. This is also often loosely taken to include replacement of a quantity with a corresponding quantity that describes the same physical property.
Energy flux, the rate of transfer of energy through a unit area (J·m −2 ·s −1). The radiative flux and heat flux are specific cases of energy flux. Particle flux, the rate of transfer of particles through a unit area ([number of particles] m −2 ·s −1) These fluxes are vectors at each point in space, and have a definite magnitude and ...
In mathematics, a percentage (from Latin per centum ' by a hundred ') is a number or ratio expressed as a fraction of 100. It is often denoted using the percent sign (%), [ 1 ] although the abbreviations pct. , pct , and sometimes pc are also used. [ 2 ]
The same method can also be used as a step in more complicated problems, such as those involving the division of a good into different proportions. When used in this way, the value of a single unit, found in the unitary method, may depend on previously calculated values rather than being a simple ratio of givens. [2]
It is expressed with the unit reciprocal second (s −1) [13] or, in the case of radioactivity, with the unit becquerel. [14] It is defined as a rate, f = N/Δt, involving the number of entities counted or the number of events happened (N) during a given time duration (Δt); [citation needed] it is a physical quantity of type temporal rate.
This new symbol can be raised to a positive or negative power. It can also be combined with other unit symbols to form compound unit symbols. [1]: 143 For example, g/cm 3 is an SI unit of density, where cm 3 is to be interpreted as (cm) 3. Prefixes are added to unit names to produce multiples and submultiples of the original unit. All of these ...