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Psi function can refer, in mathematics, to the ordinal collapsing function ...
In mathematics, the Fox–Wright function (also known as Fox–Wright Psi function, not to be confused with Wright Omega function) is a generalisation of the generalised hypergeometric function p F q (z) based on ideas of Charles Fox and E. Maitland Wright :
Lanchester's equations are related to the more recent salvo combat model equations, with two main differences. First, Lanchester's original equations form a continuous time model, whereas the basic salvo equations form a discrete time model. In a gun battle, bullets or shells are typically fired in large quantities.
A mathematical constant is a key number whose value is fixed by an unambiguous definition, often referred to by a symbol (e.g., an alphabet letter), or by mathematicians' names to facilitate using it across multiple mathematical problems. [1]
Pellet exiting muzzle, with formula for energy overlaid.. Muzzle energy is the kinetic energy of a bullet as it is expelled from the muzzle of a firearm. Without consideration of factors such as aerodynamics and gravity for the sake of comparison, muzzle energy is used as a rough indication of the destructive potential of a given firearm or cartridge.
A limited number of these pistols were also chambered in .357 SIG. [2] The .380 ACP version bore visual similarities to the larger Sigma pistols, but used a direct-blowback operating system and was otherwise unrelated. The material used for the slide in the .380 ACP pistols is a zinc-aluminum alloy known as ZAMAK. [3]
Competitors in the late 1980s and early 1990s who were using the 9×25mm Dillon used the additional powder available over .38 Super to produce more gas in the compensator, or muzzle brake, to make pistols shoot with as little muzzle rise as possible to allow faster follow-up shots on target. A muzzle brake works by diverting gases ...
From a thermodynamic point of view, a firearm is a special type of piston engine, or in general heat engine where the bullet has a function of a piston. The energy conversion efficiency of a firearm strongly depends on its construction, especially on its caliber and barrel length.