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  2. Pound (mass) - Wikipedia

    en.wikipedia.org/wiki/Pound_(mass)

    The pound or pound-mass is a unit of mass used in both the British imperial and United States customary systems of measurement.Various definitions have been used; the most common today is the international avoirdupois pound, which is legally defined as exactly 0.453 592 37 kilograms, and which is divided into 16 avoirdupois ounces. [1]

  3. Quintal - Wikipedia

    en.wikipedia.org/wiki/Quintal

    In France it used to be defined as 100 livres (pounds), about 48.95 kg (108 lb), and has been redefined as 100 kg (mesures usuelles), thus called metric quintal with symbol qq. In Spain , the quintal is still defined as 100 libras , or about 46 kg (101 lb), but the metric quintal is also defined as 100 kg; [ 3 ] In Portugal a quintal is 128 ...

  4. Kip (unit) - Wikipedia

    en.wikipedia.org/wiki/Kip_(unit)

    The name comes from combining the words kilo and pound; it is occasionally called a kilopound. Its symbol is kip, sometimes K (upper or lowercase), or less frequently, klb. When it is necessary to clearly distinguish it as a unit of force rather than mass, it is sometimes called the kip-force (symbol kipf or klbf).

  5. Ancient Roman units of measurement - Wikipedia

    en.wikipedia.org/wiki/Ancient_Roman_units_of...

    Several of the unit names were also the names of coins during the Roman Republic and had the same fractional value of a larger base unit: libra for weight and as for coin. Modern estimates of the libra range from 322 to 329 g (11.4 to 11.6 oz) with 5076 grains or 328.9 g (11.60 oz) an accepted figure.

  6. Binary prefix - Wikipedia

    en.wikipedia.org/wiki/Binary_prefix

    A binary prefix is a unit prefix that indicates a multiple of a unit of measurement by an integer power of two.The most commonly used binary prefixes are kibi (symbol Ki, meaning 2 10 = 1024), mebi (Mi, 2 20 = 1 048 576), and gibi (Gi, 2 30 = 1 073 741 824).

  7. Metric prefix - Wikipedia

    en.wikipedia.org/wiki/Metric_prefix

    Except for the early prefixes of kilo-, hecto-, and deca-, the symbols for the prefixes for multiples are uppercase letters, and those for the prefixes for submultiples are lowercase letters. [ 8 ] All of the metric prefix symbols are made from upper- and lower-case Latin letters except for the symbol for micro , which is uniquely a Greek ...

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  9. Metric system - Wikipedia

    en.wikipedia.org/wiki/Metric_system

    Mass (kg): A 1-euro coin weighs 7.5 g; [27] a Sacagawea US 1-dollar coin weighs 8.1 g; [28] a UK 50-pence coin weighs 8.0 g. [ 29 ] Time (s): The use of minutes and hours instead of kilo and mega seconds: A second is ⁠ 1 / 60 ⁠ of a minute, which is ⁠ 1 / 60 ⁠ of an hour, which is ⁠ 1 / 24 ⁠ of a day, so a second is ⁠ 1 / 86 400 ...