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Geometry: Size Matters, So Let's Measure

Size Matters, So Let's MeasureGeometryTwo's Company, Three's a TriangleA Formal IntroductionSize Matters, So Let's Measure When I draw a triangle, one of the first things I do after I admire the…

Federal Obesity Guidelines: Measuring Body Mass

The new body mass index (BMI) applies to both men and women. To determine BMI, weight in kilograms is divided by height in meters, squared. To calculate your body mass index from the table below,…

Wollaston, William Hyde

(Encyclopedia) Wollaston, William Hyde, 1766–1828, English scientist, M.D. Cambridge, 1793. His wide-ranging scientific achievements include the discovery (1802) of the dark lines (Fraunhofer lines)…

Moeris

(Encyclopedia) MoerisMoerismērˈĭs [key], ancient name of Lake Karun (Arab. Birket Qarun), c.90 sq mi (230 sq km), NE Egypt, in El Faiyum. The size of the lake is much reduced from that described by…

Bunyan, Paul

(Encyclopedia) Bunyan, Paul, legendary American lumberjack. He was the hero of a series of “tall tales” popular through the timber country from Michigan westward. Bunyan was known for his fantastic…

barn

(Encyclopedia) barn, abbr. b, in physics, unit of nuclear cross section, i.e., the effective target presented by a nucleus for collisions leading to nuclear reactions; it is equal to 10−24 square…

radioimmunoassay

(Encyclopedia) radioimmunoassay (RIA), highly sensitive laboratory technique used to measure minute amounts of substances including antigens, hormones, and drugs present in the body. The substance or…

magnitude

(Encyclopedia) magnitude, in astronomy, measure of the brightness of a star or other celestial object. The stars cataloged by Ptolemy (2d cent. a.d.), all visible with the unaided eye, were ranked on…

day

(Encyclopedia) day, period of time for the earth to rotate once on its axis. The ordinary day, or solar day, is measured relative to the sun, being the time between successive passages of the sun…