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121Fictional universe of Avatar — In the 2009 science fiction film Avatar, director James Cameron conceived a fictional universe in which humans seek to mine unobtanium on the fictional exoplanetary moon, Pandora. The Earth like moon is inhabited by a sapient indigenous humanoid… …
122Doubly fed electric machine — Doubly fed electric machines are electric motors or electric generators that have windings on both stationary and rotating parts, where both windings transfer significant power between shaft and electrical system. Doubly fed machines are useful… …
123The Lord of the Rings Online: Shadows of Angmar — For information about the expansion packs, see The Lord of the Rings Online: Mines of Moria, The Lord of the Rings Online: Siege of Mirkwood, and The Lord of the Rings Online: Rise of Isengard. The Lord of the Rings Online: Shadows of Angmar… …
124Heat engine — Thermodynamics …
125Turbojet — Turbojets are the oldest kind of general purpose jet engines. Two engineers, Frank Whittle in the United Kingdom and Hans von Ohain in Germany, developed the concept independently during the late 1930s, although credit for the first turbojet is… …
126Hydro-Québec — Type Government owned corporation Industry Electric Utilities Founded …
127Four-wheel drive in Formula One — Given its success in other forms of motor racing, notably rallying, it is perhaps surprising that four wheel drive (4WD) has only been tried a handful of times in Formula One. In the World Championship era since 1950, only eight such cars are… …
128History of the steam engine — This article primarily deals with the history of the reciprocating type steam engine. The parallel development of turbine type engines is described in the steam turbine article. The history of the steam engine stretches back as far as the first… …
