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  2. Blacker Bombard - Wikipedia

    en.wikipedia.org/wiki/Blacker_Bombard

    The Blacker Bombard, also known as the 29-mm Spigot Mortar, [1] was an infantry anti-tank weapon devised by Lieutenant-Colonel Stewart Blacker in the early years of the Second World War. Intended as a means to equip Home Guard units with an anti-tank weapon in case of German invasion, at a time of grave shortage of weapons, it was accepted only ...

  3. 9K111 Fagot - Wikipedia

    en.wikipedia.org/wiki/9K111_Fagot

    9P135M Can fire the 9M111 Fagot (NATO: AT-4 Spigot) series as well as the 9K113 Konkurs (NATO: AT-5 Spandrel) series missiles. 9P135M1 Updated version of the 9P135. 9P135M2 Updated version of the 9P135. 9P135M3 Deployed in the early 1990s. Adds 13 kg (29 lb) TPVP thermal imaging night sight – range 2,500 m (8,200 ft; 1.6 mi) at night.

  4. Bailey–Borwein–Plouffe formula - Wikipedia

    en.wikipedia.org/wiki/Bailey–Borwein–Plouffe...

    Using the P function mentioned above, the simplest known formula for π is for s = 1, but m > 1. Many now-discovered formulae are known for b as an exponent of 2 or 3 and m as an exponent of 2 or it some other factor-rich value, but where several of the terms of sequence A are zero.

  5. Spigot algorithm - Wikipedia

    en.wikipedia.org/wiki/Spigot_algorithm

    A spigot algorithm is an algorithm for computing the value of a transcendental number (such as π or e) that generates the digits of the number sequentially from left to right providing increasing precision as the algorithm proceeds. Spigot algorithms also aim to minimize the amount of intermediate storage required.

  6. Sicherman dice - Wikipedia

    en.wikipedia.org/wiki/Sicherman_dice

    This gives us the distribution of spots on the faces of a pair of Sicherman dice as being {1,2,2,3,3,4} and {1,3,4,5,6,8}, as above. This technique can be extended for dice with an arbitrary number of sides.

  7. STANAG 4569 - Wikipedia

    en.wikipedia.org/wiki/STANAG_4569

    7.62×51mm NATO Ball (Ball M80) at 30 meters with velocity 833 m/s [1] [2] 5.56×45mm NATO Ball (SS109) at 30 meters with a velocity of 900 m/s 5.56×45mm NATO Ball (M193) at 30 meters with a velocity of 937 m/s Protection against all three threats must be provided.

  8. List of chord progressions - Wikipedia

    en.wikipedia.org/wiki/List_of_chord_progressions

    3: Major Andalusian cadence: iv–III– ♭ II–I: 4: PD Backdoor progression (front door is V7) ii– ♭ VII I: 3: Major Bird changes: I vii ø –III7 vi–II7 v–I7, IV7 iv– ♭ VII7 iii–VI7 ♭ iii– ♭ VI7, ii V7 I–VI7 ii–V: 20: Major Chromatic descending 56 sequence: I–V– ♭ VII–IV: 4: Mix. Circle progression: vi ...

  9. IP code - Wikipedia

    en.wikipedia.org/wiki/IP_Code

    IP65 touchscreen display IP65 LED lamp. The IP code or ingress protection code indicates how well a device is protected against water and dust. It is defined by the International Electrotechnical Commission (IEC) under the international standard IEC 60529 [1] which classifies and provides a guideline to the degree of protection provided by mechanical casings and electrical enclosures against ...