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  2. 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.

  3. Orders of magnitude (length) - Wikipedia

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

    Fog particles are around 10–50 μm (0.00039–0.00197 in) long. ... The millimetre (SI symbol: mm) is a unit of length in the metric system equal to 10 −3 ...

  4. Caliber - Wikipedia

    en.wikipedia.org/wiki/Caliber

    For example, a 4-inch gun of 50 calibers would have a barrel 4 in × 50 = 200 in long (written as 4" L/50 or 4"/50). A 16-inch gun of 50 calibers (16" L/50) has a barrel length of 50 × 16 = 800 inches (66 ft 8 in). Both 14-in and 16-in navy guns were common in World War II.

  5. .50 BMG - Wikipedia

    en.wikipedia.org/wiki/.50_BMG

    The .50 BMG (.50 Browning Machine Gun), also known as 12.7×99mm NATO, and designated as the 50 Browning by the C.I.P., [1] is a .50 in (12.7 mm) caliber cartridge developed for the M2 Browning heavy machine gun in the late 1910s, entering official service in 1921.

  6. Unit of length - Wikipedia

    en.wikipedia.org/wiki/Unit_of_length

    Archaeologists consider that this 51.85 centimetres long unit was the origin of the ... the length two and a half meters is usually recorded as 2500 mm or 2.5 ...

  7. How long could you last in 50-degree water? Puget Sound ... - AOL

    www.aol.com/long-could-last-40-degree-130000719.html

    How long could you last in 50-degree water? Puget Sound plungers say it changes lives. Becca Most. January 15, 2025 at 8:00 AM.

  8. Normal lens - Wikipedia

    en.wikipedia.org/wiki/Normal_lens

    For a 35 mm camera with a diagonal of 43 mm, the most commonly used normal lens is 50 mm, but focal lengths between about 40 and 58 mm are also considered normal. The 50 mm focal length was chosen by Oskar Barnack, the creator of the Leica camera. [16] [17] Note that the angle of view also depends on the aspect ratio. For example, a "normal ...

  9. Melania Trump's life with President Donald Trump: See the photos

    www.aol.com/melania-trumps-life-president-donald...

    Melania Trump has returned to the White House alongside her husband, President Donald Trump. Take a look at the life of America's first lady, who went from a model to a powerful world figure.