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    Second - Wikipedia

    Etymology

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

    Uses

    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

    Clocks and solar time

    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

    Events and units of time in seconds

    Fractions of a second are usually denoted in decimal notation, for example 2.01 seconds, or two and one hundredth seconds. Multiples of seconds are usually expressed as minutes and seconds, or hours, min… See more

    How long is a second? - Live Science
    Learn how the definition of a second has changed over time, from sundials to atomic clocks. Find out how scientists are working on even more precise optical atomic clocks.
    Live Science · https://www.livescience.com/p…
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