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  2. Thousandth of an inch - Wikipedia

    en.wikipedia.org/wiki/Thousandth_of_an_inch

    25.4 μm. A thousandth of an inch is a derived unit of length in a system of units using inches. Equal to 1000 of an inch, a thousandth is commonly called a thou / ˈθaʊ / (used for both singular and plural) or, particularly in North America, a mil (plural mils). The words are shortened forms of the English and Latin words for "thousand ...

  3. Circular mil - Wikipedia

    en.wikipedia.org/wiki/Circular_mil

    A circular mil is a unit of area, equal to the area of a circle with a diameter of one mil (one thousandth of an inch or 0.0254 mm). It corresponds to approximately 5.067 × 10−4 mm2. It is a unit intended for referring to the area of a wire with a circular cross section. As the definition of the unit contains π, it is easy to calculate area ...

  4. Milliradian - Wikipedia

    en.wikipedia.org/wiki/Milliradian

    arcminutes. 54 / 5 π⁠ ≈ 3.4377′. A milliradian (SI -symbol mrad, sometimes also abbreviated mil) is an SI derived unit for angular measurement which is defined as a thousandth of a radian (0.001 radian). Milliradians are used in adjustment of firearm sights by adjusting the angle of the sight compared to the barrel (up, down, left, or ...

  5. United States customary units - Wikipedia

    en.wikipedia.org/wiki/United_States_customary_units

    Thickness of aluminum foil is measured in mils (1 ⁄ 1000 inch, or 0.0254 mm) in the United States. Cross-sectional area of electrical wire is measured in circular mils in the U.S. and Canada, one circular mil (cmil) being equal to 5.067 × 10 −4 mm 2 (or 7.854 × 10 −7 in 2). Since this is so small, actual wire is commonly measured in ...

  6. Biblical and Talmudic units of measurement - Wikipedia

    en.wikipedia.org/wiki/Biblical_and_Talmudic...

    128.4–152.8 m A ris is 2 ⁄ 15, or about 0.13, of a mil. According to Rashi (Baba Kama 79b, s.v. שלושים ריס), thirty ris is equivalent to 4 mil. Maimonides concurs in his commentary on Mishnah yoma 6:4, where 90 ris is put at 12 mil. Mil (Milin) mile: 0.598–0.712 mi (in case of Talmud opinion referencing a Roman mile: 0.919 mi [12 ...

  7. American wire gauge - Wikipedia

    en.wikipedia.org/wiki/American_wire_gauge

    The next wire size thicker than 4/0 has a cross section of 250 kcmil. A circular mil is the area of a wire one mil in diameter. One million circular mils is the area of a circle with 1,000 mil (1 inch) diameter. An older abbreviation for one thousand circular mils is MCM.

  8. List of conversion factors - Wikipedia

    en.wikipedia.org/wiki/List_of_conversion_factors

    statvolt (CGS unit) statV. ≘ c ⋅ (1 μJ/A⋅m) = 299.792458V. volt (SI unit) V. The difference in electric potential across two points along a conducting wire carrying one ampere of constant current when the power dissipated between the points equals one watt. [ 32 ] = 1 V = 1 W/A = 1 kg⋅m2/ (A⋅s3) = 1 J/C.

  9. Medieval weights and measures - Wikipedia

    en.wikipedia.org/wiki/Medieval_weights_and_measures

    fjärdingsväg – 1 ⁄ 4 mil; skogsmil – Also rast, distance between rests in the woods, approx 5 km. nymil – New mile from 1889, 10 km exactly. Commonly used to this day, normally referred to as mil. mil – Mile, also lantmil. From 1699, defined as a unity mile of 18000 aln or 10.69 km. The unified mile was meant to define the suitable ...