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SI unit of time, defined as 9 192 631 770 periods of the ground-state hyperfine transitions of caesium-133
|Instance of||SI base unit,|
unit of time,
coherent SI unit,
UCUM base unit
|Subclass of||time interval|
centimeter–gram–second system of units,
MKS system of units
|Measured physical quantity|
This category has the following 4 subcategories, out of 4 total.
Pages in category "Second"
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