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  2. Minute and second of arc - Wikipedia

    en.wikipedia.org/wiki/Minute_and_second_of_arc

    Since one degree is ⁠ 1 / 360 ⁠ of a turn, or complete rotation, one arcminute is ⁠ 1 / 21 600 ⁠ of a turn. The nautical mile (nmi) was originally defined as the arc length of a minute of latitude on a spherical Earth, so the actual Earth's circumference is very near 21 600 nmi. A minute of arc is ⁠ π / 10 800 ⁠ of a radian.

  3. Longitude - Wikipedia

    en.wikipedia.org/wiki/Longitude

    Length of one degree (black), minute (blue) and second (red) of latitude and longitude in metric (upper half) and imperial units (lower half) at a given latitude (vertical axis) in WGS84. For example, the green arrows show that Donetsk (green circle) at 48°N has a Δ long of 74.63 km/° (1.244 km/min, 20.73 m/sec etc) and a Δ lat of 111.2 km ...

  4. Ted Cruz - Wikipedia

    en.wikipedia.org/wiki/Ted_Cruz

    Cruz has been described by the Cato Institute's Center for Trade Policy Studies as a "free trader" [319] and as a "free-trade advocate" by The Wall Street Journal. [320] In 2013, he proposed the abolition of the IRS and the implementation of a flat tax "where the average American can fill out taxes on a postcard". [ 321 ]

  5. Film speed - Wikipedia

    en.wikipedia.org/wiki/Film_speed

    Historic film speed conversion table, 1952 [70] Classic camera Tessina with exposure guide, late 1950s. As discussed in the ASA and DIN sections, the definition of the ASA and DIN scales changed several times in the 1950s up into the early 1960s making it necessary to convert between the different scales.