(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…
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—…
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…
DANGER: RADIATIONTYPES OF RADIOACTIVITYRADIOTHERAPYFIND OUT MOREThe atoms of some chemical elements are unstable. They try to rearrange themselves to make more stable atoms. In the process, they…
WHAT IS THE PUPIL? HOW THE EYE FOCUSESWHY DO WE HAVE TWO EYES? HOW DO WE SEE IN COLOR? FIND OUT MOREOur eyes create our sense of vision. They take in light rays, focus them to create an image, and…
IndiaMovies and FilmAsian Film HistoryTwo Chinas, Two CinemasHong Kong: Cantonese, Kung-Fu, and a New WaveBenching the Benshi: Japan's Illustrious CenturyThe Master: The Art of Akira KurosawaIndia…
(Encyclopedia) observatory, scientific facility especially equipped to detect and record naturally occurring scientific phenomena. Although geological and meteorological observatories exist, the term…
