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  2. Orders of magnitude (length) - Wikipedia

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

    To help compare different orders of magnitude, this section lists lengths between 10 −15 meters and 10 −14 meters (1 femtometer and 10 fm). 1 fm – diameter of a neutron , approximate range-limit of the color force carried between quarks by gluons [ 6 ] [ 7 ]

  3. List of scale model sizes - Wikipedia

    en.wikipedia.org/wiki/List_of_scale_model_sizes

    This is the scale which MOROP has defined for O scale, because it is half the size of the 1:22.5 Scale G-gauge model railways made by German manufacturers. [citation needed] 1:43.5: 7.02 mm: Model railways (0) Exact O scale of 7 mm = 1 foot. 1:43: 7.088 mm: Die-cast cars: Still the most popular scale for die-cast cars worldwide, metric or ...

  4. System of units of measurement - Wikipedia

    en.wikipedia.org/wiki/System_of_units_of_measurement

    Traditional Burmese units of measurement are used in Burma, with partial transition to the metric system. U.S. units are used in limited contexts in Canada due to the large volume of trade with the U.S. There is also considerable use of imperial weights and measures, despite de jure Canadian conversion to metric.

  5. Unit of length - Wikipedia

    en.wikipedia.org/wiki/Unit_of_length

    In the centimeter–gram–second system of units, the basic unit of length is the centimeter, or 1 ⁄ 100 of a meter. Other non-SI units are derived from decimal multiples of the meter. Other non-SI units are derived from decimal multiples of the meter.

  6. The Scale of the Universe - Wikipedia

    en.wikipedia.org/wiki/The_Scale_of_the_Universe

    1.3 1 terameter and beyond. 2 See also. 3 References. ... 6 × 10 −15 meters Average size of an atom's nucleus ... 9.6 × 10 9 meters Total human height — 10 10 ...

  7. Metric prefix - Wikipedia

    en.wikipedia.org/wiki/Metric_prefix

    A metric prefix is a unit prefix that precedes a basic unit of measure to indicate a multiple or submultiple of the unit. All metric prefixes used today are decadic . Each prefix has a unique symbol that is prepended to any unit symbol.

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  9. Conversion of units - Wikipedia

    en.wikipedia.org/wiki/Conversion_of_units

    The factor–label method can convert only unit quantities for which the units are in a linear relationship intersecting at 0 (ratio scale in Stevens's typology). Most conversions fit this paradigm. An example for which it cannot be used is the conversion between the Celsius scale and the Kelvin scale (or the Fahrenheit scale). Between degrees ...