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AIzaSyB4mHJ5NPEv-XzF7P6NDYXjlkCWaeKw5bc
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1 jan 1967 ano - Seconds - A Second is formally defined not trough movements of celestial bodies but as 9,192,631,770 vibrations of the cesium atom.
Adicionado na linha do tempo:
Maths - History of time
By
Charlotte Best
21 nov 2019
0
0
455
Data:
1 jan 1967 ano
Agora
~ 58 years ago
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