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A variable (pronounced /ˈvɛərɪəbl/) is an attribute of a physical or an abstract system which may change its value while it is under observation. Examples include the height of a child, the temperature across a state, or the input to a function. This concept is relevant to and applied to almost all areas of mathematics, science and engineering.
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Variable - Wikipedia, the free encyclopedia
A variable (pronounced /ˈvɛərɪəbl/) is an attribute of a physical or an abstract system which may change its value while it is under observation. Examples include the height of a child, the temperature across a state, or the input to a function. This concept is relevant to and applied to almost all areas of mathematics, science and engineering.
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var·i·a·ble (vâr--b l, v r-) adj. 1. a. Likely to change or vary; subject to variation; changeable. b. Inconstant; fickle. 2. Biology Tending to deviate, as from a normal or ...
adjective . 1. apt or liable to vary or change; changeable: variable weather; variable moods. 2. capable of being varied or changed; alterable: a variable time limit for completion ...
adjective. apt or likely to change or vary; changeable, inconstant, fickle, fluctuating, etc. that can be changed or varied; Biol. tending to deviate in some way from the type ...
A star is classified as variable if its apparent brightness as seen from Earth changes over time, whether the changes are due to variations in the star's actual luminosity, or to variations in the amount of the star's light that is blocked from reaching Earth. Many, possibly most, stars have at least some variation in luminosity: the energy output of our Sun, for example, varies by about 0.1% over an 11 year solar cycle.
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Variable star - Wikipedia, the free encyclopedia
A star is classified as variable if its apparent brightness as seen from Earth changes over time, whether the changes are due to variations in the star's actual luminosity, or to variations in the amount of the star's light that is blocked from reaching Earth. Many, possibly most, stars have at least some variation in luminosity: the energy output of our Sun, for example, varies by about 0.1% over an 11 year solar cycle.
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Definition of variable from the Merriam-Webster Online Dictionary with audio pronunciations, thesaurus, Word of the Day, and word games.
variable adj. Likely to change or vary; subject to variation; changeable. Inconstant; fickle. Biology
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