(Encyclopedia) yard, abbr. yd, basic unit of length in the customary system of English units of measurement; all other units in the English system, such as the inch, foot, rod, and mile, are derived…
(Encyclopedia) cgs system, system of units of measurement based on the metric system and having the centimeter of length, the gram of mass, and the second of time as its fundamental units. Other cgs…
ArcsGeometryAnatomy of a CircleBasic TermsArcsCircumference and Area: Pi Anyone?TangentsFrom One Theorem Comes Many I know that I've just thrown a lot of new terminology at you, but I'm not done.…
(Encyclopedia) alpha particle, one of the three types of radiation resulting from natural radioactivity. Alpha radiation (or alpha rays) was distinguished and named by E. R. Rutherford in 1909, who…
(Encyclopedia) Nunes, PedroNunes, Pedropĕˈdr&oobreve; n&oomacr;ˈnəsh [key], Lat. Petrus Nonius, 1502–1578, Portuguese mathematician, geographer, and writer on navigation and geometry. He was…
(Encyclopedia) Wright, Sir Almroth Edward, 1861–1947, British pathologist. He was professor of pathology (1892–1902) at the Army Medical School, Netley, and professor of experimental pathology, Univ…
From One Theorem Comes ManyGeometryAnatomy of a CircleBasic TermsArcsCircumference and Area: Pi Anyone?TangentsFrom One Theorem Comes Many You haven't had a proof in awhile. “Never let a section…
(Encyclopedia) Drude, Paul Karl LudwigDrude, Paul Karl Ludwigpoul kärl l&oobreve;tˈvĭkh dr&oomacr;ˈdə [key], 1863–1906, German physicist. Drude first experimented with the physical…
(Encyclopedia) Rutherfurd, Lewis MorrisRutherfurd, Lewis Morrisrŭᵺˈərfərd [key], 1816–92, American physicist, b. New York City, grad. Williams, 1834. From 1837 to 1849 he practiced law. Rutherfurd…
