Melissabeartrix, 27 days ago A second "the base unit of time in the International System of Units that is equal 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 cesium-133 atom" Hugz & xXx https://www.merriam-webster.com/dictionary/second
A second
"the base unit of time in the International System of Units that is equal 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 cesium-133 atom"
Hugz & xXx
https://www.merriam-webster.com/dictionary/second
