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  2. Unit of time - Wikipedia

    en.wikipedia.org/wiki/Unit_of_time

    10 −12 s: One trillionth of a second. nanosecond: 10 −9 s: One billionth of a second. Time for molecules to fluoresce. shake: 10 −8 s: 10 nanoseconds, also a casual term for a short period of time. microsecond: 10 −6 s: One millionth of a second. Symbol is μs millisecond: 10 −3 s: One thousandth of a second. Shortest time unit used ...

  3. Orders of magnitude (time) - Wikipedia

    en.wikipedia.org/wiki/Orders_of_magnitude_(time)

    5.4 × 10 83 Qs (1.7 × 10 106 years): The approximate lifespan of a supermassive black hole with a mass of 20 trillion solar masses [21] 10 10 10 76.66 {\displaystyle 10^{10^{10^{76.66}}}} Qs: The scale of an estimated Poincaré recurrence time for the quantum state of a hypothetical box containing an isolated black hole of stellar mass [ 22 ...

  4. Timeline of the far future - Wikipedia

    en.wikipedia.org/wiki/Timeline_of_the_far_future

    This is an accepted version of this page This is the latest accepted revision, reviewed on 23 January 2025. Scientific projections regarding the far future Several terms redirect here. For other uses, see List of numbers and List of years. Artist's concept of the Earth 5–7.5 billion years from now, when the Sun has become a red giant While the future cannot be predicted with certainty ...

  5. Orders of magnitude (length) - Wikipedia

    en.wikipedia.org/wiki/Orders_of_magnitude_(length)

    Fog particles are around 10–50 μm (0.00039–0.00197 in) long. ... can run in about 10 seconds; ... lists lengths starting at 10 13 m (10 Tm or 10 billion km or 67 ...

  6. Nanosecond - Wikipedia

    en.wikipedia.org/wiki/Nanosecond

    A nanosecond (ns) is a unit of time in the International System of Units (SI) equal to one billionth of a second, that is, ⁠ 1 / 1 000 000 000 ⁠ of a second, or 10 −9 seconds. The term combines the SI prefix nano-indicating a 1 billionth submultiple of an SI unit (e.g. nanogram, nanometre, etc.) and second, the primary unit of time in the SI.

  7. 1,000,000,000 - Wikipedia

    en.wikipedia.org/wiki/1,000,000,000

    This is an accepted version of this page This is the latest accepted revision, reviewed on 20 January 2025. See also: Orders of magnitude (numbers) and Long and short scales Natural number 1000000000 List of numbers Integers ← 10 0 10 1 10 2 10 3 10 4 10 5 10 6 10 7 10 8 10 9 Cardinal One billion (short scale) One thousand million, or one milliard (long scale) Ordinal One billionth (short ...

  8. Elon Musk’s new ‘user seconds’ metric is another curious ...

    www.aol.com/finance/elon-musk-user-seconds...

    Globally, the 7-day average was 360.7 billion—with a B—seconds spent on the platform. CEO Linda Yaccarino chimed in with the somewhat confusing rejoinder that “no wonder new users are ...

  9. Orders of magnitude (numbers) - Wikipedia

    en.wikipedia.org/wiki/Orders_of_magnitude_(numbers)

    10 000 000 000; short scale: ten billion; long scale: ten thousand million, or ten milliard) Biology – bacteria in the human body: There are roughly 10 10 bacteria in the human mouth . [ 29 ]