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radioactivity
(Encyclopedia) CE5 Effects of a magnetic field on the products of radioactivity CE5 Disintegration series: Radioactive decay of radium-226 into lead-206 radioactivity, spontaneous disintegration or decay of t...rocket, in aeronautics
(Encyclopedia) CE5 Relative positions of the components of the Saturn V rocket, the U.S. space vehicle used in the moon missions rocket, any vehicle propelled by ejection of the gases produced by combustion of s...ocean
(Encyclopedia)ocean, interconnected mass of saltwater covering 70.78% of the surface of the earth, often called the world ocean. It is subdivided into four (or five) major units that are separated from each other i...War of 1812
(Encyclopedia)War of 1812, armed conflict between the United States and Great Britain, 1812–15. It followed a period of great stress between the two nations as a result of the treatment of neutral countries by bo...sculpture
(Encyclopedia)sculpture, art of producing in three dimensions representations of natural or imagined forms. It includes sculpture in the round, which can be viewed from any direction, as well as incised relief, in ...telescope
(Encyclopedia) CE5 Mirror arrangements for a reflecting telescope telescope, traditionally, a system of lenses, mirrors, or both, used to gather light from a distant object and form an image of it. Traditional o...Annelida
(Encyclopedia) CE5 A. The earthworm, Lumbricus terrestris, representative of the phylum Annelida. B. Internal anatomy of an earthworm. Annelida ənĕlˈĭdə [key] [Lat., anellus=a ring], phylum of soft-bodied, ...Mozambique, country, Africa
(Encyclopedia) CE5 Mozambique mōˌzəmbēkˈ [key], officially Republic of Mozambique, republic (2015 est. pop. 25,303,000), 302,659 sq mi (784,090 sq km), SE Africa. It borders on the Indian Ocean in the east; ...vitamin
(Encyclopedia)vitamin, group of organic substances that are required in the diet of humans and animals for normal growth, maintenance of life, and normal reproduction. Vitamins act as catalysts; very often either t...physics
(Encyclopedia)physics, branch of science traditionally defined as the study of matter, energy, and the relation between them; it was called natural philosophy until the late 19th cent. and is still known by this na...Browse by Subject
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