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The Weight of Gasoline

The Question: Do you know the weight (lbs) of a gallon of gasoline? A gallon of water? Thank you. The Answer: Thanks for e-mailing Information…

Krugman, Paul

(Encyclopedia) Krugman, PaulKrugman, Paulkr&oomacr;gˈmən [key], 1953–, American economist, b. Long Island, N.Y., grad. Yale (B.A., 1974), Massachusetts Institute of Technology (Ph.D., 1977). A…

Willard Boyle

Born: 1924 Birthplace: Nova Scotia Charge-coupled device—The charge-coupled device (CCD) was key to advancing…

DK Science: Lasers

HOLOGRAMLASER LIGHT SHOWFIND OUT MORESome beams of light are powerful enough to cut through metal. Others are precise enough to use for delicate surgery on people’s bodies. These remarkable…

Accurate Mechanical Clocks

Source: National Institute of Standards and Technology Physics Laboratory In Europe during most of the Middle Ages (roughly 500 to 1500 A.D.), technological advancement was at a virtual standstill…

Asian Americans in Business and Media

Jerry YangBiographies ofNotable Asian Pacific AmericansA-Z ListGovernment Officials and PoliticiansBusiness and Media LeadersAthletes & Sports PersonalitiesScientistsEntertainers:…

An Wang

Born: 1920Birthplace: Shanghai, China Magnetic pulse controlling device—Wang's contributions to computer technology included the magnetic pulse controlling device, the principle upon which magnetic…

Raymond Kurzweil

Born: Feb. 12, 1948 Reading machine—When entrepreneur Kurzweil introduced the Kurzweil Reading Machine in 1976, it was hailed as the most important advance in reading for the blind since Braille.…