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How long is a metric second?

Name: Anonymous 2013-10-23 21:55

How long is a metric second in imperial seconds?

Name: Anonymous 2013-10-23 23:54

One metric second is equivalent to one imperial second, which is equivalent to 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.

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