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Frequency (symbol f), most often measured in hertz (symbol: Hz), is the number of occurrences of a repeating event per unit of time. [1] It is also occasionally referred to as temporal frequency for clarity and to distinguish it from spatial frequency.
A frequency distribution shows a summarized grouping of data divided into mutually exclusive classes and the number of occurrences in a class. It is a way of showing unorganized data notably to show results of an election, income of people for a certain region, sales of a product within a certain period, student loan amounts of graduates, etc.
frequents for immoral purposes houses or localities inhabited by prostitutes; or; frequents resorts of vice such as drinking or gambling dens, or places where opium or other intoxicating drugs are smoked or otherwise consumed; or; generally appears in public while drunk; or; is addicted to smoking opium; or; uses obscene or abusive language in ...
Principal is an adjective meaning "main" (though it can also be a noun meaning the head of a college or similar institution). Principle is a noun meaning a fundamental belief or rule of action. Standard: The principal achievement of the nineteenth century is the rise of industry. Standard: He got sent to the principal's office for talking ...
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Meaning q: each, every (from Latin quaque) q15: every 15 minutes q6h q6° once every 6 hours q2wk: once every 2 weeks qAc Before every meal (from Latin quaque ante cibum) q.a.d. every other day (from Latin quaque altera die) QALY: quality-adjusted life year: q.AM: every day before noon (from Latin quaque die ante meridiem) q.d. every day (from ...
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The hertz is defined as one per second for periodic events. The International Committee for Weights and Measures defined the second as "the duration of 9 192 631 770 periods of the radiation corresponding to the transition between the two hyperfine levels of the ground state of the caesium-133 atom" [3] [4] and then adds: "It follows that the hyperfine splitting in the ground state of the ...