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  2. Pixel density - Wikipedia

    en.wikipedia.org/wiki/Pixel_density

    For example, a 15-inch (38 cm) display whose dimensions work out to 12 inches (30.48 cm) wide by 9 inches (22.86 cm) high, capable of a maximum 1024×768 (or XGA) pixel resolution, can display around 85 PPI, or 33.46 PPCM, in both the horizontal and vertical directions. This figure is determined by dividing the width (or height) of the display ...

  3. iMac (Intel-based) - Wikipedia

    en.wikipedia.org/wiki/IMac_(Intel-based)

    The display and glass are laminated together, eliminating a 2 mm gap between them. The 21.5-in and 27-inch screens remained at their previous resolutions, 1920 × ...

  4. 19-inch rack - Wikipedia

    en.wikipedia.org/wiki/19-inch_rack

    The posts are each 0.625 inches (15.88 mm) wide, and are separated by a gap of 17.75 inches (450.85 mm), giving an overall rack width of 19 inches (482.60 mm). The posts have holes in them at regular intervals, with both posts matching, so that each hole is part of a horizontal pair with a center-to-center distance of 18.312 inches (465.12 mm).

  5. Type 99 81 mm mortar - Wikipedia

    en.wikipedia.org/wiki/Type_99_81_mm_mortar

    The differences between the Type 99 and the US 81-mm mortar, M1 are pronounced. The tube length of the Japanese weapon is only about half that of the US mortar 59.5 inches vs 25.5 inches. Of much greater significance, however, is the difference in the method of firing.

  6. 100-ton gun - Wikipedia

    en.wikipedia.org/wiki/100-ton_gun

    The 100-ton gun (also known as the Armstrong 100-ton gun) [6] was a British coastal defense gun and is the world's largest black powder cannon. It was a 17.72-inch (450 mm) rifled muzzle-loading (RML) gun made by Elswick Ordnance Company, the armaments division of the British manufacturing company Armstrong Whitworth, owned by William Armstrong.

  7. 5.56×45mm NATO - Wikipedia

    en.wikipedia.org/wiki/5.56×45mm_NATO

    The FN-created cartridge was named "5.56×45mm NATO" with a military designation of SS109 in NATO and M855 in the U.S. [13] These new SS109 ball cartridges required a 228 mm (1-in-9 inch) twist rate while adequately stabilizing the longer L110 tracer projectile required an even faster, 178 mm (1-in-7 inch), twist rate. [5]

  8. Newton 6-inch mortar - Wikipedia

    en.wikipedia.org/wiki/Newton_6-inch_Mortar

    The Newton 6-inch replaced the 2-inch medium mortar beginning in February 1917.. It was a simple smooth bore muzzle-loading mortar consisting of a 57-inch (1,448 mm) one-piece steel tube barrel, with a "striker stud" inside the centre of the closed base of the tube.

  9. M230 chain gun - Wikipedia

    en.wikipedia.org/wiki/M230_chain_gun

    The system can be fitted with a Stinger pod and Longbow Hellfire missile rails and comes equipped with a 30 mm M230LF chain gun and the 7.62 mm coaxial machine gun, as well as non-kinetic defeat capabilities and a Rada onboard multimission hemispheric radar. The Army chose DRS because of the flexibility of the reconfigurable turret to allow for ...