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7.63×25mm Mauser, which was the basis for, and has nearly identical dimensions to, the Tokarev, but has different loading specifications. 7.65×25mm Borchardt, from which both the Mauser and Parabellum cartridges were developed; 7.65×21mm Parabellum; 7.65×17mm Browning, also known as .32 ACP; 7.62mm SP-2, used only in the TKB-506 cigar ...
The 7.62×39mm (aka 7.62 Soviet, formerly .30 Russian Short) [5] round is a rimless bottlenecked intermediate cartridge of Soviet origin. The cartridge is widely used due to the worldwide proliferation of Kalashnikov rifles, as well as the SKS, RPD, and RPK light machine guns .
The Magical Number Seven, Plus or Minus Two. " The Magical Number Seven, Plus or Minus Two: Some Limits on Our Capacity for Processing Information " [1] is one of the most highly cited papers in psychology. [2] [3] [4] It was written by the cognitive psychologist George A. Miller of Harvard University 's Department of Psychology and published ...
545 J (402 ft⋅lbf) The 7.63×25mm Mauser ( .30 Mauser Automatic) round is a bottleneck, rimless, centerfire cartridge, originally developed for the Mauser C96 service pistol. This cartridge headspaces on the shoulder of the case. [1] It later served as the basis for the 7.62mm Tokarev cartridge commonly used in Soviet and Eastern Bloc weapons.
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655 J (483 ft⋅lbf) Test barrel length: 120mm (4.724 in) The 7.62×25mm Tokarev cartridge (designated as the 7.62 × 25 Tokarev by the C.I.P. [5]) is a Soviet rimless bottleneck pistol cartridge widely used in former Soviet states and in China, among other countries. The cartridge has since been replaced in most capacities by the 9×18mm ...
The problem may be solved using simple addition. With 64 squares on a chessboard, if the number of grains doubles on successive squares, then the sum of grains on all 64 squares is: 1 + 2 + 4 + 8 + ... and so forth for the 64 squares. The total number of grains can be shown to be 2 64 −1 or 18,446,744,073,709,551,615 (eighteen quintillion ...
Power of two. A power of two is a number of the form 2n where n is an integer, that is, the result of exponentiation with number two as the base and integer n as the exponent . Powers of two with non-negative exponents are integers: 20 = 1, 21 = 2, and 2n is two multiplied by itself n times.
Cartridge dimensions. The 7.62×54mmR has 4.16 ml (64 grain H 2 O) cartridge case capacity. The exterior shape of the case was designed to promote reliable case feeding and extraction in bolt-action rifles and machine guns alike, under challenging conditions. 7.62×54mmR maximum C.I.P. cartridge dimensions.
Most-perfect magic square when it is a pandiagonal magic square with two further properties (i) each 2×2 subsquare add to 1/k of the magic constant where n = 4k, and (ii) all pairs of integers distant n/2 along any diagonal (major or broken) are complementary (i.e. they sum to n 2 + 1).