Mains electricity — A table lamp connected to a wall socket (the mains). Mains is the general purpose alternating current (AC) electric power supply. In the US, electric power is referred to by several names including household power, household electricity,… … Wikipedia
technology, history of — Introduction the development over time of systematic techniques for making and doing things. The term technology, a combination of the Greek technē, “art, craft,” with logos, “word, speech,” meant in Greece a discourse on the arts, both… … Universalium
Protective relay — See also: Power system protection In electrical engineering, a protective relay is a complex electromechanical apparatus, often with more than one coil, designed to calculate operating conditions on an electrical circuit and trip circuit breakers … Wikipedia
Thomas Edison — Infobox person name = Thomas Alva Edison caption = Genius is one percent inspiration, ninety nine percent perspiration. Thomas Alva Edison, Harper s Monthly (September 1932) birth date =birth date|1847|02|11 birth place =Milan, Ohio death date… … Wikipedia
Electronic component — Various components An electronic component is a basic electronic element and may be available in a discrete form having two or more electrical terminals (or leads). These are intended to be connected together, usually by soldering to a printed… … Wikipedia
textile — /teks tuyl, til/, n. 1. any cloth or goods produced by weaving, knitting, or felting. 2. a material, as a fiber or yarn, used in or suitable for weaving: Glass can be used as a textile. adj. 3. woven or capable of being woven: textile fabrics. 4 … Universalium
Mathematics and Physical Sciences — ▪ 2003 Introduction Mathematics Mathematics in 2002 was marked by two discoveries in number theory. The first may have practical implications; the second satisfied a 150 year old curiosity. Computer scientist Manindra Agrawal of the… … Universalium
photography, technology of — Introduction equipment, techniques, and processes used in the production of photographs. The most widely used photographic process is the black and white negative–positive system (Figure 1 >). In the camera the lens projects an image of… … Universalium
Mister Fantastic — Mr. Fantastic Artwork for the cover of Fantastic Four vol. 3, 52 (Apr, 2002). Art by Mike Wieringo. Publication information Publisher … Wikipedia
Ariane 5 — Launching/Ariane|type=rocket Infobox rocket caption = Ariane 5 mock up name = Ariane 5 function = Heavy launch vehicle manufacturer = EADS Astrium for ESA and Arianespace country origin = Europe height = 59 m alt height = 193 ft diameter = 5.4 m… … Wikipedia
Livermore, California — For the California wine region, see Livermore Valley AVA. City of Livermore City … Wikipedia