Question

Basic unit of second?????????????????​

Answer 1

Answer:

The basic unit of time is second.

Step-by-step explanation:

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Answer 2

Answer:

the second , symbol s ,is the SI unit of time .it is defined by taking the fixed numerical value of the cesium frequency triangle Vcs, 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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