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51Wire recording — A Peirce 55 B dictation wire recorder from 1945 …
52History of perpetual motion machines — The history of perpetual motion machines dates back to the Middle Ages. For millennia, it was not clear whether perpetual motion devices were possible or not, but the development of modern thermodynamics has indicated that they are impossible.… …
53Thiele/Small — commonly refers to a set of electromechanical parameters that define the specified low frequency performance of a loudspeaker driver. These parameters are published in specification sheets by driver manufacturers so that designers have a guide in …
54Radial tire — A cross section of a tire. Number 12 indicates the radial ply. Numbers 14 and 16 are bias plies. A radial tire (more properly, a radial ply tire) is a particular design of automotive tire (in British English, tyre). In this design, the cord plies …
55Thousand Foot Krutch — in June 2009 (From L to R) Vocalist Trevor McNevan and Bassist Joel Bruyere Background information Origin Peterborough …
56Microchip implant (human) — For use in animals, see Microchip implant (animal). The hand of microchip implant hobbyist Amal Graafstra, just after an operation to insert an RFID tag. The yellow coloration comes from iodine used to disinfect the hand for surgery. A human… …
573 Colours Red — For the French Polish Swiss film, see Three Colors: Red. 3 Colours Red Origin London, England Genres Hard rock Punk rock Indie Britrock Years active 1995–1999 / 2002–2005 …
58Magnetization — This article is about magnetization as it appears in Maxwell s equations of classical electrodynamics. For a microscopic description of how magnetic materials react to a magnetic field, see magnetism. For mathematical description of fields… …
59Clark cell — (1897) The Clark cell, invented by English engineer Josiah Latimer Clark in 1873, is a wet chemical cell (colloquially: battery) that produces a highly stable voltage usable as a laboratory standard. Contents …
60Armature reaction drop — is the effect of a magnetic field on the distribution of the flux under main poles of a generator. [cite book|title=Basic Electricity |author= A.Van Valkenburgh|year=1993|publisher=Thomson Delmar Learning|url=http://books.google.com/books?vid=ISBN… …
