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  2. Order of magnitude - Wikipedia

    en.wikipedia.org/wiki/Order_of_magnitude

    billion giga- (G) 1 000 000 000: 10 9: 9 ... so it is very easily determined without a calculator to be 6. ... million 2: 100: 1 000 000 000 000: trillion: billion 3:

  3. 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 7 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 ...

  4. Orders of magnitude (time) - Wikipedia

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

    3.6 ks: The length of one hour (h), the time for the minute hand of a clock to cycle once around the face, approximately 1/24 of one mean solar day 7.2 ks (2 h): The typical length of feature films 35.73 ks: the rotational period of planet Jupiter, fastest planet to rotate

  5. Unit of time - Wikipedia

    en.wikipedia.org/wiki/Unit_of_time

    hour: 60 min: deciday 0.1 d (10 % of a day) 2.4 hours, or 144 minutes. One-tenth of a day is 1 dd (deciday), also called "gēng" in traditional Chinese timekeeping. day: 24 h: Longest unit used on stopwatches and countdowns. The SI day is exactly 86 400 seconds. week: 7 d: Historically sometimes also called "sennight". decaday 10 d (1 Dd) 10 days.

  6. Chronology of computation of π - Wikipedia

    en.wikipedia.org/wiki/Chronology_of_computation...

    41.92 hours 250,000: 1967 Jean Guilloud and M. Dichampt CDC 6600 (Paris) 28 hours 500,000: 1973 Jean Guilloud and Martine Bouyer CDC 7600: 23.3 hours 1,001,250: 1981 Kazunori Miyoshi and Yasumasa Kanada: FACOM M-200 [28] 137.3 hours 2,000,036: 1981 Jean Guilloud Not known 2,000,050: 1982 Yoshiaki Tamura: MELCOM 900II [28] 7.23 hours 2,097,144: 1982

  7. Failure rate - Wikipedia

    en.wikipedia.org/wiki/Failure_rate

    The Failures In Time (FIT) rate of a device is the number of failures that can be expected in one billion (10 9) device-hours of operation [17] (e.g. 1,000 devices for 1,000,000 hours, or 1,000,000 devices for 1,000 hours each, or some other combination).

  8. Decimal time - Wikipedia

    en.wikipedia.org/wiki/Decimal_time

    This was opposed by Jean-Marie Viallon, of the Sainte-Geneviève Library in Paris, who thought that decimal hours, equal to 2.4 old hours, were too long, and that 100 centidays were too many, and proposed dividing two halves of the day into 10 new hours each, for a total of 20 per day, and that simply changing the numbers on watch dials from 12 ...

  9. Googol - Wikipedia

    en.wikipedia.org/wiki/Googol

    A googol is the large number 10 100 or ten to the power of one hundred. In decimal notation, it is written as the digit 1 followed by one hundred zeros: 10, 000, 000 ...