magnetic head gap width
31Wikipedia:Featured article candidates — Here, we determine which articles are to be featured articles (FAs). FAs exemplify Wikipedia s very best work and satisfy the FA criteria. All editors are welcome to review nominations; please see the review FAQ. Before nominating an article,… …
32subatomic particle — or elementary particle Any of various self contained units of matter or energy. Discovery of the electron in 1897 and of the atomic nucleus in 1911 established that the atom is actually a composite of a cloud of electrons surrounding a tiny but… …
33Gear — For the gear like device used to drive a roller chain, see Sprocket. This article is about mechanical gears. For other uses, see Gear (disambiguation). Two meshing gears transmitting rotational motion. Note that the smaller gear is rotating… …
34Brushed DC electric motor — A brushed DC motor is an internally commutated electric motor designed to be run from a direct current power source. Contents 1 Simple two pole DC motor 2 The commutating plane 2.1 Compensation for stator field distortion …
35Lightning — 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 …
36Piezoelectricity — is the ability of some materials (notably crystals and certain ceramics, including bone) to generate an electric potentialPrinciples of Instrumental Analysis. 6th Edition, 2007. Skoog, Holler, and Crouch. Chapter 1, Sec. 1C 4, Pg. 9.] in response …
37Organic light-emitting diode — Demonstration of a flexible OLED device A green emitting OLED device An …
38Wooden toy train — Wooden toy trains are a system of small toy trains that run on wooden track. The tracks feature grooves which serve to guide the wheels of rolling stock. Traditionally parts are made of hardwoods which resemble anthropomorphical, fictional, and… …
39McLouth Steel — Corporation Industry Steel Fate Bankruptcy Successor Detroit Steel Company Founded 1934 Defunct 1996 Headquarters Detroit, MI 1934 1981 …
40railroad — /rayl rohd /, n. 1. a permanent road laid with rails, commonly in one or more pairs of continuous lines forming a track or tracks, on which locomotives and cars are run for the transportation of passengers, freight, and mail. 2. an entire system… …
