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Chemistry: Bohr: What Is It Good For?

Bohr: What Is It Good For?ChemistryThe Modern AtomBohr: What Is It Good For?Spectroscopy: Reading Between the LinesA Quantum Leap into Quantum Mechanics While many theorists were busy playing with…

Movies and Film: Hitler's Hired Help

Hitler's Hired HelpMovies and FilmGermany's Film HistoryGermany's Greatest -IsmHitler's Hired HelpA Few Young MenRoads Not Taken: Film in East GermanyUnification and Beyond Leni Riefenstahl…

molybdenum

(Encyclopedia) molybdenummolybdenumməlĭbˈdənəm [key] [Gr.,=leadlike], metallic chemical element; symbol Mo; at. no. 42; at. wt. 95.96; m.p. about 2,617℃; b.p. about 4,612℃; sp. gr. 10.22 at 20℃;…

ultraviolet astronomy

(Encyclopedia) ultraviolet astronomy, study of celestial objects by means of the ultraviolet radiation they emit, in the wavelength range from about 90 to about 350 nanometers. Ultraviolet (UV) line…

zinc

(Encyclopedia) zinc, metallic chemical element; symbol Zn; at. no. 30; at. wt. 65.38; m.p. 419.58℃; b.p. 907℃; sp. gr. 7.133 at 25℃; valence +2. Zinc is a lustrous bluish-white metal. It is found in…

Projected NBA Lottery Picks

Projected Draft Lottery Picks (#1–13) 1. Los Angeles ClippersMike Bibby, PG, 6'2 (Arizona) The Clippers always find a way to mess things up. While Maurice Taylor ('97 pick) is the only…

Baseball Contraction Timeline

Contraction Timeline The Events of 2001-2002 by John Gettings 2001 Oct. 24 A Canadian newspaper, The Windsor Star(Ontario) publishes a report that Major League Baseball…

Philadelphia, Pa.

Mayor: Michael Nutter (to Jan. 2016) 2010 census population (rank): 1,526,006 (5); Male: 719,813 (47.2%); Female: 806,1933 (52.8%); White: 626,221 (41.0%); Black: 661,839 (43.4%);…

DK Science: Atmosphere

AURORASLAYERS OF THE ATMOSPHEREOZONE LAYERFIND OUT MOREPRESSURE SYSTEMSThe Earth would be as lifeless as the Moon without the atmosphere – a blanket of gases surrounding the planet and…

DK Science: Climate

EQUATORIAL FORESTCLIMATE ZONESHEAT FROM THE SUNMOUNTAIN CLIMATESCOASTAL CLIMATESSEASONSFIND OUT MOREEvery part of Earth has its own climate – the typical pattern of weather over a long period…