(Encyclopedia) Bolt, Usain St. Leo, 1986–, Jamaican sprinter. Unusually tall (6 ft 5 in./1.96 m) for his sport, he won the gold medal for the 200-m sprint at the 2002 world junior championships and…
(Encyclopedia)
CE5
Particle detector—Bubble chamber: A. Pressure drops as piston is raised; B. Charged particles passing through chamber ionize atoms in liquid; C. Bubbles form around atoms and…
Spears, Britney Jean
(Encyclopedia) Spears, Britney Jean, 1981- , b. McComb, Ms. Spears studied singing and dance as a young child in her hometown and enrolled in New…
Quadratic Equations and Inequalities
Algebra
Quadratic Equations and Inequalities Solving Quadratics by Factoring Completing the Square The Quadratic Formula All Signs Point to the…
The world's most sophisticated and expensive science project by Mark Hughes and Beth Rowen Two scientists checking equipment in the central tube of the LHC. Photo…
(Encyclopedia) Nielsen, A. C. (Arthur Charles Nielsen)Nielsen, A. C.nēlˈsən [key], 1897–1980, American market researcher, b. Chicago, grad. Univ. of Wisconsin, Madison (B.S., 1918). He worked as an…
(Encyclopedia) Baltimore & Ohio Railroad (B&O), first U.S. public railroad, chartered in 1827 by a group of Baltimore businessmen to regain trans-Allegheny traffic lost to the newly opened…
