sum of active temperatures
81Quantum mechanics — For a generally accessible and less technical introduction to the topic, see Introduction to quantum mechanics. Quantum mechanics …
82Corrosion — v · d · e Materials failure modes Buckling · …
83Mars Express — CG image of Mars Express Operator ESA Mission type Orbiter + Lander Satellite of …
84Tibet — Pour les articles homonymes, voir Tibet (homonymie). Tibet historique …
85Europe — /yoor euhp, yerr / for 1; /yoo roh pee, yeuh / for 2, n. 1. a continent in the W part of the landmass lying between the Atlantic and Pacific oceans, separated from Asia by the Ural Mountains on the E and the Caucasus Mountains and the Black and… …
86Switzerland — /swit seuhr leuhnd/, n. a republic in central Europe. 7,248,984; 15,944 sq. mi. (41,294 sq. km). Cap.: Bern. French, Suisse. German, Schweiz. Italian, Svizzera. Latin, Helvetia. * * * Switzerland Introduction Switzerland Background: Switzerland s …
87pre-Columbian civilizations — Introduction the aboriginal American Indian (Mesoamerican Indian) cultures that evolved in Meso America (part of Mexico and Central America) and the Andean region (western South America) prior to Spanish exploration and conquest in the 16th …
88Fischer–Tropsch process — The Fischer–Tropsch process (or Fischer–Tropsch synthesis) is a set of chemical reactions that convert a mixture of carbon monoxide and hydrogen into liquid hydrocarbons. The process, a key component of gas to liquids technology, produces a… …
89Wikipedia: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,… …
90Geological history of Earth — impacting the Earth in a glancing blow. [cite journal | last = R. Canup and E. Asphaug | title = Origin of the Moon in a giant impact near the end of the Earth s formation | journal = Nature | volume = 412 | pages = 708–712 | date = 2001 | url =… …
