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2024年5月9日 · electricity, phenomenon associated with stationary or moving electric charges. Electric charge is a fundamental property of matter and is borne by elementary particles. In electricity the particle involved is the electron, which carries a charge designated, by convention, as negative. Thus, the various manifestations of electricity are the ...
2024年5月10日 · Amish, member of a Christian group in North America, primarily the Old Order Amish Mennonite Church.The church originated in the late 17th century among followers of Jakob Ammann. History and church structure Jakob Ammann (c. 1644–c. 1730) was a Mennonite leader whose controversial teachings caused a schism among his coreligionists in Switzerland, Alsace, and southern Germany.
- The Editors of Encyclopaedia Britannica
2024年5月15日 · His fame was now worldwide. Montesquieu, French political philosopher whose principal work, The Spirit of Laws, was a major contribution to political theory. It inspired the Declaration of the Rights of Man and the Constitution of the United States. Learn more about Montesquieu’s life and work.
2024年5月9日 · transformer, device that transfers electric energy from one alternating-current circuit to one or more other circuits, either increasing (stepping up) or reducing (stepping down) the voltage. Transformers are employed for widely varying purposes; e.g., to reduce the voltage of conventional power circuits to operate low-voltage devices, such as ...
