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  2. 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 ...

  3. Microsecond - Wikipedia

    en.wikipedia.org/wiki/Microsecond

    50 microseconds – cycle time for highest human-audible tone (20 kHz). 50 microseconds – to read the access latency for a modern solid state drive which holds non-volatile computer data. [5] 100 microseconds (0.1 ms) – cycle time for frequency 10 kHz. 125 microseconds – common sampling interval for telephone audio (8000 samples/s). [6]

  4. Orders of magnitude (frequency) - Wikipedia

    en.wikipedia.org/wiki/Orders_of_magnitude...

    10 −15: 1 femtohertz (fHz) ~3 fHz: Sound waves created by a supermassive black hole in the Perseus cluster [1] 10 −14: 10 fHz ~31.71 fHz: Once every one million years 10 −12: 1 picohertz (pHz) 1.23 pHz Precession of the Earth's axis (about every 25,700 years) 10 −11: 10 pHz ~31.71 pHz: Once per millennium 10 −10: 100 pHz ~317.1 pHz ...

  5. Unit of time - Wikipedia

    en.wikipedia.org/wiki/Unit_of_time

    5 yr: In early Roman times, the interval between censuses. decade: 10 yr: indiction: 15 yr: Interval for taxation assessments (Roman Empire). gigasecond: 10 9 s: About 31.7 years. jubilee: 50 yr: century: 100 yr: millennium: 1000 yr: Also called "kiloannum". Age: 2 148 and 2/3 of a year: A superstitious unit of time used in astrology, each of ...

  6. Orders of magnitude (temperature) - Wikipedia

    en.wikipedia.org/wiki/Orders_of_magnitude...

    3–5 TK in proton–antiproton reactions; 3.6 TK, temperature at which matter doubles in mass (compared to its mass at 0 K) due to relativistic effects; 5.5 TK, highest man-made temperature in thermal equilibrium as of 2015 (quark–gluon plasma from LHC collisions) [12] 10 TK, 100 microseconds after the Big Bang; 45–67 TK at collapsar of a ...

  7. Metric time - Wikipedia

    en.wikipedia.org/wiki/Metric_time

    The word "minute" comes from the Latin pars minuta prima, meaning "first small part", and "second" from pars minuta secunda or "second small part". Angular measure also uses sexagesimal units; there, it is the degree that is subdivided into minutes and seconds, while in time, it is the hour.

  8. Millisecond - Wikipedia

    en.wikipedia.org/wiki/Millisecond

    A millisecond (from milli-and second; symbol: ms) is a unit of time in the International System of Units equal to one thousandth (0.001 or 10 −3 or 1 / 1000) of a second [1] [2] or 1000 microseconds.

  9. List of radioactive nuclides by half-life - Wikipedia

    en.wikipedia.org/wiki/List_of_radioactive...

    6 10 −6 seconds (microseconds) 7 10 −3 seconds (milliseconds) 8 10 0 seconds. ... 15.7 berkelium-243: 4.5 16 dubnium-267: 4.6 17 plutonium-243: 4.956 17.84 ...