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Pure-play helium. Pure-play helium, also known as primary helium or green helium is helium that is extracted from the earth as the main product. Since the early 20th century, most of the world's helium supply has been extracted from natural gas as part of the nitrogen rejection process. The preference for primary helium is driven by the planned ...
Flammability diagrams show the control of flammability in mixtures of fuel, oxygen and an inert gas, typically nitrogen. Mixtures of the three gasses are usually depicted in a triangular diagram, known as a ternary plot. Such diagrams are available in the speciality literature. [1] [2] [3] The same information can be depicted in a normal ...
For a gas that is a mixture of two or more pure gases (air or natural gas, for example), the gas composition must be known before compressibility can be calculated. Alternatively, the compressibility factor for specific gases can be read from generalized compressibility charts [1] that plot Z {\displaystyle Z} as a function of pressure at ...
An octane rating, or octane number, is a standard measure of a fuel 's ability to withstand compression in an internal combustion engine without undergoing pre-ignition. The higher the octane number, the more compression the fuel can withstand before detonating. Octane rating does not relate directly to the power output or the energy content of ...
Perfect gas. In physics and engineering, a perfect gas is a theoretical gas model that differs from real gases in specific ways that makes certain calculations easier to handle. In all perfect gas models, intermolecular forces are neglected. This means that one can neglect many complications that may arise from the Van der Waals forces.
The purity of a gas is generally expressed as a grade prefixed with the letter N (rather than postfixed), indicating the "number of nines" in the percentage or decimal fraction. For example, a N2.0 gas is 99% (two nines) pure and 1% impurities by volume; a N6.0 gas is 99.9999% (six nines) pure, with 1 part per million (1 ppm or 1 vpm, volume ...
Recorded per capita consumption of pure alcohol (litres) per adult 15 years of age and over per year ; Country 1996 2016 Afghanistan 0.2 Albania 2.59: 7.5 Algeria 0.27: 0.9 Andorra
CSR (/ s i-ɛ s-ɑːr /; Korean: 첫사랑; RR: Cheotsarang; lit. First Love) is a South Korean girl group formed and managed by A2Z Entertainment. The septet—consisting of members Sua, Geumhee, Sihyeon, Seoyeon, Yuna, Duna and Yeham—was at the time of debut composed entirely of 17-year-olds, a first time in the industry.
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