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  2. List of scale model sizes - Wikipedia

    en.wikipedia.org/wiki/List_of_scale_model_sizes

    Works with 15 mm miniatures where a 6 foot man would equal 15.24 mm 1:110: 2.771 mm Used for some model ships, aircraft and diecast cars. 1:108: 2.822 mm An historic size for ships, also used for rockets and spacecraft. 15 mm figure scale for wargaming is considered interchangeable with this scale. [9] 1:100: 3.048 mm

  3. Millimetre - Wikipedia

    en.wikipedia.org/wiki/Millimetre

    Different lengths as in respect to the electromagnetic spectrum, measured by the metre and its derived scales.The microwave is between 1 meter to 1 millimeter.. The millimetre (international spelling; SI unit symbol mm) or millimeter (American spelling) is a unit of length in the International System of Units (SI), equal to one thousandth of a metre, which is the SI base unit of length.

  4. Orders of magnitude (length) - Wikipedia

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

    The decimetre (SI symbol: dm) is a unit of length in the metric system equal to 10 −1 metres (⁠ 1 / 10 ⁠ m = 0.1 m). To help compare different orders of magnitude , this section lists lengths between 10 centimeters and 100 centimeters (10 −1 meter and 1 meter).

  5. Metric system - Wikipedia

    en.wikipedia.org/wiki/Metric_system

    In 1791 the commission originally defined the metre based on the size of the earth, equal to one ten-millionth of the distance ... (1 mm) 3 = (0.001 m) 3 = 0.000 000 ...

  6. Metric prefix - Wikipedia

    en.wikipedia.org/wiki/Metric_prefix

    1 km 2 means one square kilometre, or the area of a square of 1000 m by 1000 m. In other words, an area of 1 000 000 square metres and not 1000 square metres. 2 Mm 3 means two cubic megametres, or the volume of two cubes of 1 000 000 m by 1 000 000 m by 1 000 000 m, i.e. 2 × 10 18 m 3, and not 2 000 000 cubic metres (2 × 10 6 m 3).

  7. List of metric units - Wikipedia

    en.wikipedia.org/wiki/List_of_metric_units

    The stokes (St) is a unit of kinematic viscosity equal to 1 cm 2 ⋅s −1 (100 mm 2 ⋅s −1). [3] The stilb (sb) is a unit of luminance equal to 1 cd⋅cm −2 (10 kcd⋅m −2). [4] The phot (ph) is a unit of illuminance equal to 1 lm⋅cm −2 (10 klx). [3] The rayl is a unit of specific acoustic impedance, equal to 1 dyn⋅s⋅cm −3 (10 ...

  8. Unit of length - Wikipedia

    en.wikipedia.org/wiki/Unit_of_length

    The base unit in the International System of Units (SI) is the meter, defined as "the length of the path travelled by light in vacuum during a time interval of 1 ⁄ 299792458 seconds." [4] It is approximately equal to 1.0936 yd.

  9. Milliradian - Wikipedia

    en.wikipedia.org/wiki/Milliradian

    A common adjustment value in firearm sights is 1 cm at 100 meters which equals ⁠ 10 mm / 100 m ⁠ = ⁠ 1 / 10 ⁠ mrad. The true definition of a milliradian is based on a unit circle with a radius of one and an arc divided into 1,000 mrad per radian, hence 2,000 π or approximately 6,283.185 milliradians in one turn , and rifle scope ...