Science, asked by harshkadyan673, 7 months ago

what is national unit of second

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Answered by kishandixit3919sad

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Answered by doll54

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Unit of time is second. The second, symbol s, is the SI unit of time. It is defined by taking the fixed numerical value of the cesium frequency ΔνCs, the unperturbed ground-state hyperfine transition frequency of the cesium 133 atom, to be 9 192 631 770 when expressed in the unit Hz, which is equal to s-1.

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