(Encyclopedia) radiationradiationrāˌdēāˈshən [key], term applied to the emission and transmission of energy through space or through a material medium and also to the radiated energy itself. In its…
Why don't the oceans freeze? In the Arctic and Antarctic, they do. The ice cap at the North Pole is entirely over ocean; on the other hand, the ice is only a few feet deep. Oceans don't freeze…
HOW DOES HEAT FLOW? WHAT ARE THE THREE TYPES OF HEAT TRANSFER? CAN WE SEE HEAT? TEMPERATURETHERMOMETERSTHERMAL INSULATORSFIND OUT MOREEverything around us contains heat. Heat is a form of energy—…
(Encyclopedia) Kajita, Takaaki 1959–, Japanese physicist, Ph.D. Univ. of Tokyo, 1986. In 1988 he joined the faculty at the Univ. of Tokyo, where he is now professor and director of the Institute for…
(Encyclopedia) Avogadro's numberAvogadro's numberävōgäˈdrō [key] [for Amedeo Avogadro], number of particles contained in one mole of any substance; it is equal to 602,252,000,000,000,000,000,000, or…
(Encyclopedia) spinal puncture, surgical penetration of the spinal canal by a hollow needle introduced between two of the lumbar vertebrae. The arrangement permits injection of antibiotics or…
(Encyclopedia) Candela, Felix (Félix Candela Outeriño)Candela, Felixfāˈlēks kändāˈlä [key], 1910–97, Mexican-American architect, b. Madrid. Candela studied in Madrid but was forced to flee Spain…
Speed is the measure of motion. You can find it by dividing the distance covered by the time it takes to travel that distance.Speed of Light If a star is 10 light-years away, it is about 60…
By Mike Morrison, John Gettings, and Gerry Brown RAY BOURQUE Bourque didn't need much. He had a family, money, and a solid gold hall-of-fame career. But the one thing he still needed was a…
World
Shiite Bloc Urges Prime Minister to Resign (April 2): Leaders of the Supreme Council for the Islamic Revolution in Iraq call on Ibrahim al-Jaafari to resign, citing his failure to form a…
