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Define second... |
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Answer» ??? Wait ✋ 1 second....? The second is the base unit of time in the International System of Units, commonly understood and historically defined as \u200b¹⁄₈₆₄₀₀ of a day – this factor derived from the division of the day first into 24 hours, then to 60 minutes and finally to 60 seconds each. |
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