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61Beta decay — Nuclear physics Radioactive decay Nuclear fission Nuclear fusion Classical decays …
62Galaxy — This article is about the astronomical structure. For other uses, see Galaxy (disambiguation). NGC 4414, a typical spiral galaxy in the constellation Coma Berenices, is about 55,000 light years in diameter and approximately 60 million light… …
63Hall effect — For the Colombian band, see The Hall Effect (band). The Hall effect is the production of a voltage difference (the Hall voltage) across an electrical conductor, transverse to an electric current in the conductor and a magnetic field perpendicular …
64Bussard ramjet — The Bussard ramjet is a theoretical method of spacecraft propulsion proposed in 1960 by the physicist Robert W. Bussard, popularized by Larry Niven in his Known Space series of books, and referenced by Carl Sagan in the television series and book …
65Lightning — This article is about the atmospheric electrical phenomenon. For other uses, see Lightning (disambiguation). See also: Lightning strike Lightning striking Atlanta, United States Lightning is an atmospheric electrostatic discharge (spar …
66Spark-gap transmitter — A spark gap transmitter is a device for generating radio frequency electromagnetic waves. These devices served as the transmitters for most wireless telegraphy systems for the first three decades of radio (1887 ndash;1916) and the first… …
67Plasma nitriding — or ion nitriding (sometimes also called plasma ion nitriding) or glow discharge nitriding, is an industrial surface hardening treatment for metallic materials.DescriptionA plasma is the fourth state of matter, the other three being solid, liquid… …
68Ion (Marvel Comics) — Superherobox| caption=Violetta as Ion comic color=background:#ff8080 character name=Ion real name=Violetta Todd publisher=Marvel Comics debut=Machine Man #15 (June 1980) creators=Tom DeFalco and Steve Ditko alliance color=background:#ffc0c0… …
69Instabilité électrothermique — L instabilité électrothermique dite aussi instabilité de Velikhov ou instabilité d ionisation a été prédite par la théorie par le physicien russe Evgeny Velikhov en 1962, prédiction qui fut confirmée expérimentalement dès 1965[1]. C est une… …
70NGC 5775 — Галактика …
