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- History of philosophy (13862 bytes)
7: ...verything from [[Post-Medieval]] through the specific period of the early [[20th century]].
12: ...g the most important were [[Heraclitus]] ("All is fire", all is [[chao]]tic and transitory), [[Anaxago...
14: ...ssing popular philosophical questions. The theory fills in the blanks by saying that the Sophists' stu...
16: ...terchangeably, was destroying the piety and moral fiber of the city.
20: ...hilosopher kings. In the later dialogues Socrates figures less prominently, and the Theory of Forms is... - Moth (5332 bytes)
14: ...d butterflies is a popular taxonomy, not a scientific one. Sometimes the names "[[Rhopalocera]]" (butt...
18: ==Economic significance of moths==
22: ...kely to eat mixed materials containing artificial fibres. There are some reports that they can be repe...
30: ...ch as the moon), but on encountering a bright artificial light it navigates maintaining a constant ang...
32: ...re thus inclined to circle ambient objects in the Mach band region, usually at a radius of about one foo... - Aviation history (39698 bytes)
3: ... story in [[The Bible]]. Nevertheless, it exemplifies man's desire to fly.
5: ...methods used to control planes have advanced significantly as well. Initially planes were controlled ...
13: ...ms how successful these were. See [[First flying machine]] for a review of such claims.
15: [[Leonardo da Vinci]] was the first person to seriously design an aircraft, design...
17: ...craft through the air was the crux of flying. Sufficiently light and powerful engines would not be av... - Isaac Newton (23339 bytes)
4: ...le]]s (see [[wave-particle duality]]). He was the first to realise that the spectrum of [[color|colour...
6: ...rvation of [[momentum]] and [[angular momentum]]. Finally, he studied the speed of sound in air, and v...
14: ...her also said that his body at that time can even fit inside a quart mug. His father had died three mo...
25: ...;Sir Isaac Newton walking in his gardens, had the first thought of his system of gravitation, upon see...
27: ...Numeri Terminorum Infinitas'' (''On Analysis by Infinite Series''), and later in ''De methodis serieru... - Pressure (9004 bytes)
1: ... making any lasting impression; however, the same finger pushing a [[thumbtack]] can easily damage the...
23: ...n shrink the size of our "container" down to an infinitely small point, and the pressure has a single ...
36: ...atic and stagnation pressure are related by the [[Mach number]] of the fluid. In addition, there can be ...
51: ...on the density of water, a measured rather than defined quantity.
53: ...equal to typical air pressures at sea level and defined to be - Apple Macintosh (24250 bytes)
4: ...rcial)|famous Super Bowl commercial]]. It was the first marketed personal computer to popularize the [...
7: ...based successor (AKA Darwin, a modern OS based on Mach 3.0 and 4.4 BSD), named [[Mac OS X]] (the "X" is ...
16: * Long file names, with [[whitespace]] and no [[file extension]].
32: * First laptop with keyboard behind a palmrest ([[Powe...
33: * First laptop with built-in pointing device ([[PowerB... - List of philosophers (79981 bytes)
6: *[[Firmin Abauzit]], (1679-1767)
267: *[[Claude Buffier]], (1661-1737){{fn|R}}
348: *[[Andrea Christofidou]]
387: *[[Lady Anne Finch Conway]], (1631-1679){{fn|C}}{{fn|O}}{{fn|R}}
430: *[[Bruno de Finetti]], (1906-1985){{fn|O}} - History of chemistry (8174 bytes)
8: ...om inorganic material. This opened a new research field in chemistry, and by the end of the [[19th cen...
12: ... atomic explanation of [[Brownian motion]] in the first decade of the [[20th century]].
23: ...he previous centuries. Systematic production of refined materials provided a ready supply of products ...
27: ...g up to this achievement, Pauling was awarded the first of his two Nobel prizes.
31: ...ng. Their helical structure was simultaneously confirmed by [[Rosalind Franklin]]'s x-ray crystallogra... - Propeller (12179 bytes)
1: A '''propeller''' can be seen as a rotating [[fin]] in water or a [[wing]] in air. The horizontal ...
6: ...large portion of the blade is therefore at an inefficient angle, the inboard ends of the blade are sub...
9: ...k. Advanced control systems and better section profiling are required to counter the need for accurate...
11: ...e aircraft to back up on its own at unimproved airfields when aircraft tractors are unavailable.
13: ...eases [[fuel]] consumption. It is, therefore, beneficial to run an engine at an optimum constant indep... - Jet engine (22370 bytes)
6: ...s a [[turboprop]], is more common and much more efficient. Very small aircraft generally use conventio...
8: The combustion [[efficiency]] of any given jet engine, like any [[inter...
10: ...s fans, and afterburners. The kind of peripheral fitted is dependent on the aircraft design applicati...
15: ...lutionary to aviation as the [[Wright brothers]]' first flight.
17: ... [[thermojet]] by [[Secondo Campini]]) the air is first compressed by a fan driven by a conventional p...
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