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The delta L problem (ΔL problem) refers to certain firearm chambers and the incompatibility of some ammunition made for that chamber. ΔL is a Commission Internationale Permanente (C.I.P.) geometric dimensioning and tolerancing definition for cartridge cases that are longer than the chamber they have to fit in. "Delta L" essentially means "difference in length".
Robert Johnson (May 8, 1911, Hazlehurst, Mississippi – August 16, 1938). Singer-songwriter and guitarist, recognized since the 1960s as a master of Delta blues and an important influence on many rock musicians. [25] Tommy Johnson (1896, near Terry, Mississippi – November 1, 1956). Guitarist, singer-songwriter.
In mathematical analysis, the Dirac delta function (or δ distribution ), also known as the unit impulse, [1] is a generalized function on the real numbers, whose value is zero everywhere except at zero, and whose integral over the entire real line is equal to one. [2] [3] [4] Since there is no function having this property, modelling the delta ...
Delta Electronics, Inc. (also known as DELTA or Delta Electronics) is a Taiwanese electronics manufacturing company. Its headquarters are in Neihu, Taipei. It is known for its DC industrial and computer fans and for switching power supplies. The company operates approximately 200 facilities worldwide, including manufacturing, sales, and R&D ...
Delta bond. In chemistry, delta bonds ( δ bonds) are covalent chemical bonds, where four lobes of one involved atomic orbital overlap four lobes of the other involved atomic orbital. This overlap leads to the formation of a bonding molecular orbital with two nodal planes which contain the internuclear axis and go through both atoms.
An inverted river delta exists behind this strait. The Tagus River City of Lisbon and Tagus river delta as seen from space. Another example is the delta of the Tagus river in Portugal, although due to sedimentation this delta is now only very partially inverted, with the valley now mostly filled with sediment. It is still about 15 km wide and ...
Single delta potential. The time-independent Schrödinger equation for the wave function ψ(x) of a particle in one dimension in a potential V(x) is. where ħ is the reduced Planck constant, and E is the energy of the particle. The delta potential is the potential. where δ(x) is the Dirac delta function. It is called a delta potential well if ...
Delta-v (more known as " change in velocity "), symbolized as and pronounced deltah-vee, as used in spacecraft flight dynamics, is a measure of the impulse per unit of spacecraft mass that is needed to perform a maneuver such as launching from or landing on a planet or moon, or an in-space orbital maneuver. It is a scalar that has the units of ...