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  2. Unit of time - Wikipedia

    en.wikipedia.org/wiki/Unit_of_time

    A unit of time is any particular time interval, used as a standard way of measuring or expressing duration. The base unit of time in the International System of Units (SI), and by extension most of the Western world , is the second , defined as about 9 billion oscillations of the caesium atom.

  3. Metric time - Wikipedia

    en.wikipedia.org/wiki/Metric_time

    Metric time is the measure of time intervals using the metric system. The modern SI system defines the second as the base unit of time, and forms multiples and submultiples with metric prefixes such as kiloseconds and milliseconds. Other units of time – minute, hour, and day – are accepted for use with SI, but are not part of it

  4. Time in physics - Wikipedia

    en.wikipedia.org/wiki/Time_in_physics

    In physics, time is defined by its measurement: time is what a clock reads. [1] ... In order to measure time, one can record the number of occurrences (events) ...

  5. Time - Wikipedia

    en.wikipedia.org/wiki/Time

    Time is the continuous progression of our changing existence that occurs in an apparently irreversible succession from the past, through the present, and into the future. [1] [2] [3] It is a component quantity of various measurements used to sequence events, to compare the duration of events (or the intervals between them), and to quantify rates of change of quantities in material reality or ...

  6. Time standard - Wikipedia

    en.wikipedia.org/wiki/Time_standard

    An example of a kind of time standard can be a time scale, specifying a method for measuring divisions of time. A standard for civil time can specify both time intervals and time-of-day. Standardized time measurements are made using a clock to count periods of some period changes, which may be either the changes of a natural phenomenon or of an ...

  7. Chronometry - Wikipedia

    en.wikipedia.org/wiki/Chronometry

    Time metrology or time and frequency metrology is the application of metrology for timekeeping, including frequency stability. [ 28 ] [ 29 ] Its main tasks are the realization of the second as the SI unit of measurement for time and the establishment of time standards and frequency standards as well as their dissemination .

  8. International System of Units - Wikipedia

    en.wikipedia.org/wiki/International_System_of_Units

    The SI comprises a coherent system of units of measurement starting with seven base units, which are the second (symbol s, the unit of time), metre (m, length), kilogram (kg, mass), ampere (A, electric current), kelvin (K, thermodynamic temperature), mole (mol, amount of substance), and candela (cd, luminous intensity). The system can ...

  9. Category:Time measurement systems - Wikipedia

    en.wikipedia.org/wiki/Category:Time_measurement...

    Pages in category "Time measurement systems" The following 32 pages are in this category, out of 32 total. This list may not reflect recent changes. 0–9.

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