What is the SI base unit of time?

1 Answer
Steve J.
Apr 3, 2018

The SI base unit of time is the second, the symbol is s.

Explanation:

The second is defined as "The second is the duration of 9192631770 periods of the radiation corresponding to the transition between the two hyperfine levels of the ground state of the caesium 133 atom."
Ref: https://en.wikipedia.org/wiki/SI_base_unit

I hope this helps,
Steve

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