A unit of time known as second is one of the base units of time measurement in SI. In ancient times a second was defined in terms to the duration of a solar day, and in modern times this unit is defined regarding the period of the Earth revolving around the Sun. It is possible to measure a second by using an atomic, an electric, and a mechanical approach. A second is equal to 1/60th of an hour, and this unit is commonly marked with the symbol s.

Seconds Conversions

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