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  2. Orders of magnitude (numbers) - Wikipedia

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

    (1 000 000 000 000 000; 1000 5; short scale: one quadrillion; long scale: one thousand billion, or one billiard) ISO: peta- (P) Biology – Insects : 1,000,000,000,000,000 to 10,000,000,000,000,000 (10 15 to 10 16 ) – The estimated total number of ants on Earth alive at any one time (their biomass is approximately equal to the total biomass ...

  3. 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 ...

  4. Indian numbering system - Wikipedia

    en.wikipedia.org/wiki/Indian_numbering_system

    Commonly used quantities include lakh (one hundred thousand) and crore (ten million) – written as 1,00,000 and 1,00,00,000 respectively in some locales. [1] For example: 150,000 rupees is "1.5 lakh rupees" which can be written as "1,50,000 rupees", and 30,000,000 (thirty million) rupees is referred to as "3 crore rupees" which can be written ...

  5. Orders of magnitude (time) - Wikipedia

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

    More exactly, the mean solar day is 86.400 002 ks due to tidal braking, and increasing at the rate of approximately 2 ms/century; to correct for this time standards like UTC use leap seconds with the interval described as "a day" on them being most often 86.4 ks exactly by definition but occasionally one second more or less so that every day ...

  6. Long and short scales - Wikipedia

    en.wikipedia.org/wiki/Long_and_short_scales

    a thousand thousand units, and a byllion is worth a thousand thousand millions, and tryllion is worth a thousand thousand byllions, and a quadrillion is worth a thousand thousand tryllions, and so on for the others. And an example of this follows, a number divided up and punctuated as previously described, the whole number being 745324 tryllions,

  7. Order of magnitude - Wikipedia

    en.wikipedia.org/wiki/Order_of_magnitude

    1000: 1 × 10 3: 3 The geometric mean of ... so it is very easily determined without a calculator to be 6. ... quadrillion 5: 100000 (1 000 000) 5: nonillion: quintillion

  8. Femtosecond - Wikipedia

    en.wikipedia.org/wiki/Femtosecond

    A femtosecond is equal to 1000 attoseconds, or 1/1000 picosecond. Because the next higher SI unit is 1000 times larger, times of 10 −14 and 10 −13 seconds are typically expressed as tens or hundreds of femtoseconds. Typical time steps for molecular dynamics simulations are on the order of 1 fs. [4]

  9. Hindustani numerals - Wikipedia

    en.wikipedia.org/wiki/Hindustani_numerals

    Like many Indo-Aryan languages, Hindustani (Hindi-Urdu) has a decimal numeral system that is contracted to the extent that nearly every number 1–99 is irregular, and needs to be memorized as a separate numeral.