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Helium-3 (3 He [1] [2] see also helion) is a light, stable isotope of helium with two protons and one neutron. (In contrast, the most common isotope, helium-4, has two protons and two neutrons.) Helium-3 and protium (ordinary hydrogen) are the only stable nuclides with more protons than neutrons. It was discovered in 1939.
In a 2005 review, "SureThing is a bit better, but lacks niceties like the alignment tools we've all grown accustomed to from the menu design functions in DVD-authoring programs." [ 9 ] Sally Wiener Grotta and Daniel Grotta wrote in a 2009 PC World that "SureThing CD Labeler is an intuitive, easy-to-learn program" and "SureThing can make the ...
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The least stable is 10 He, with half-life 260(40) yoctoseconds (2.6(4) × 10 −22 s), though 2 He may have an even shorter half-life. In Earth's atmosphere, the ratio of 3 He to 4 He is 1.343(13) × 10 −6. [5] However, the isotopic abundance of helium varies greatly depending on its origin.
Record labels may be small, localized and "independent" ("indie"), or they may be part of a large international media group, or somewhere in between.The Association of Independent Music (AIM) defines a 'major' as "a multinational company which (together with the companies in its group) has more than 5% of the world market(s) for the sale of records or music videos."
The three-atom combination of helium-4 atoms is an Efimov state. [1] [2] Helium-3 is predicted to form a trimer, although ground state dimers containing helium-3 are completely unstable. [3] Helium trimer molecules have been produced by expanding cold helium gas from a nozzle into a vacuum chamber.
In computing, a printer is a peripheral machine which makes a durable representation of graphics or text, usually on paper. [1] While most output is human-readable, bar code printers are an example of an expanded use for printers. [2] Different types of printers include 3D printers, inkjet printers, laser printers, and thermal printers. [3]
A helium-3 refrigerator is a simple device used in experimental physics for obtaining temperatures down to about 0.2 kelvins. By evaporative cooling of helium-4 (the more common isotope of helium ), a 1-K pot liquefies a small amount of helium-3 in a small vessel called a helium-3 pot.