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  2. Fraction - Wikipedia

    en.wikipedia.org/wiki/Fraction

    A simple fraction (also known as a common fraction or vulgar fraction) [n 1] is a rational number written as a/b or ⁠ ⁠, where a and b are both integers. [9] As with other fractions, the denominator (b) cannot be zero. Examples include ⁠ 1 / 2 ⁠, − ⁠ 8 / 5 ⁠, ⁠ −8 / 5 ⁠, and ⁠ 8 / −5 ⁠.

  3. 0.999... - Wikipedia

    en.wikipedia.org/wiki/0.999...

    In the newsgroup sci.math in the 1990s, arguing over 0.999... became a "popular sport", and was one of the questions answered in its FAQ. [ 57 ] [ 58 ] The FAQ briefly covers ⁠ 1 3 {\displaystyle \textstyle {\frac {1}{3}}} ⁠ , multiplication by 10, and limits, and alludes to Cauchy sequences as well.

  4. Gauge (firearms) - Wikipedia

    en.wikipedia.org/wiki/Gauge_(firearms)

    Gauge was determined from the weight of a solid sphere of lead that will fit the bore of the firearm and is expressed as the multiplicative inverse of the sphere's weight as a fraction of a pound, e.g., a one-twelfth pound lead ball fits a 12-gauge bore.

  5. Fractional distillation - Wikipedia

    en.wikipedia.org/wiki/Fractional_distillation

    Fractional distillation is the separation of a mixture into its component parts, or fractions. Chemical compounds are separated by heating them to a temperature at which one or more fractions of the mixture will vaporize. It uses distillation to fractionate.

  6. List of countries by trade-to-GDP ratio - Wikipedia

    en.wikipedia.org/wiki/List_of_countries_by_trade...

    World map by trade as a share of GDP [1]. This is a list of countries by trade-to-GDP ratio, i.e. the sum of exports and imports of goods and services, divided by gross domestic product, expressed as a percentage, based on the data published by World Bank.

  7. List of countries by electricity consumption - Wikipedia

    en.wikipedia.org/wiki/List_of_countries_by...

    Data in this table are from Ember and are for 2023 unless otherwise specified. [1] Includes some dependent territories.Total consumption figures are in terawatt-hours while per-capita figures are in megawatt-hours.

  8. Margin of error - Wikipedia

    en.wikipedia.org/wiki/Margin_of_error

    0.84 0.994 457 883 210: 0.9995 3.290 526 731 492: 0.95 1.644 853 626 951: 0.99995 3.890 591 886 413: 0.975 1.959963984540: 0.999995 4.417 173 413 469: 0.99 2.326 347 874 041: 0.9999995 4.891 638 475 699: 0.995

  9. Air pollutant concentrations - Wikipedia

    en.wikipedia.org/wiki/Air_pollutant_concentrations

    = fraction of the emitted exhaust gas, by volume, which is water vapor As an example, a wet basis concentration of 40 ppmv in a gas having 10 volume percent water vapor would have a: C dry basis = 40 ÷ ( 1 - 0.10 ) = 44.4 ppmv.