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thermodynamics
(Encyclopedia)thermodynamics, branch of science concerned with the nature of heat and its conversion to mechanical, electric, and chemical energy. Historically, it grew out of efforts to construct more efficient he...Pennsylvania
(Encyclopedia) CE5 Pennsylvania pĕnsəlvāˈnyə [key], one of the Middle Atlantic states of the United States. It is bordered by New Jersey, across the Delaware River (E), Delaware (SE), Maryland (S), West Virg...tennis
(Encyclopedia) CE5 Tennis court tennis, game played indoors or outdoors by two players (singles) or four players (doubles) on a level court. In 1900 the international team competition known as the Davis Cup t...Iroquois Confederacy
(Encyclopedia)Iroquois Confederacy or Iroquois League ĭrˈəkwoiˌ, –kwäˌ [key], North American confederation of indigenous peoples, initially comprising the Mohawk, Oneida, Onondaga, Cayuga, and Seneca; the n...Cretaceous period
(Encyclopedia)Cretaceous period krĭtāˈshəs [key], third and last period of the Mesozoic era of geologic time (see Geologic Timescale, tablegeologic timescale, table), lasting from approximately 144 to 65 millio...Elizabeth I, queen of England
(Encyclopedia)Elizabeth I, 1533–1603, queen of England (1558–1603). After the Armada, Elizabeth's popularity began to wane. Parliament became less tractable and began to object to the abuse of royally grante...modern architecture
(Encyclopedia)modern architecture, new architectural style that emerged in many Western countries in the decade after World War I. It was based on the “rational” use of modern materials, the principles of funct...geography
(Encyclopedia)geography, the science of place, i.e., the study of the surface of the earth, the location and distribution of its physical and cultural features, the areal patterns or places that they form, and the ...Republican party
(Encyclopedia)Republican party, American political party. In 1980, the conservative Ronald Reagan, a former supporter of Barry Goldwater, regained the presidency for the Republicans and reversed long-standi...Supreme Court Justices (table)
(Encyclopedia) Supreme Court Justices(including dates on bench) Chief Justices Associate Justices ...Browse by Subject
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