The second (symbol: s) is a unit of time, historically defined as 1⁄86400 of a day – this factor derived from the division of the … See more

"Minute" comes from the Latin pars minuta prima, meaning "first small part" i.e. first division of the hour - dividing into sixty, and "second" comes from the pars minuta secunda, "second small part", dividing again into s… See more

Analog clocks and watches often have sixty tick marks on their faces, representing seconds (and minutes), and a "second hand" to mark the passage of time in seconds. Digital clocks and watches often have a two … See more

A mechanical clock, which does not depend on measuring the relative rotational position of the Earth, keeps uniform time called mean time, within whatever accuracy is intrinsic to it. That means that every second, mi… See more