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transformer

(Encyclopedia)transformer, electrical device used to transfer an alternating current or voltage from one electric circuit to another by means of electromagnetic induction. The simplest type of transformer consists ...

Hersh, Seymour Myron

(Encyclopedia)Hersh, Seymour Myron, 1937–, American investigative journalist, b. Chicago, grad. Univ. of Chicago (1958). He began his career (1959) at a local news bureau, then became a wire service correspondent...

tantalum

(Encyclopedia)tantalum tănˈtələm [key] [from Tantalus], metallic chemical element; symbol Ta; at. no. 73; at. wt. 180.94788; m.p. 2,996℃; b.p. 5,400±100℃; sp. gr. 16.65 at 20℃; valence +2, +3, +4, or +5....

fishing

(Encyclopedia)fishing, act of catching fish for consumption or display. Fishing—usually by hand, club, spear, net, and (at least as early as 23,000 years ago) by hook—was known to prehistoric people. It was pra...

Lincoln, cities, United States

(Encyclopedia)Lincoln. 1 City (1990 pop. 15,418), seat of Logan co., central Ill., in a farm area; inc. 1865. It is a shipping and industrial center in an agricultural area with light manufacturing. The city was pl...

rhenium

(Encyclopedia)rhenium rēˈnēəm [key], metallic chemical element; symbol Re; at. no. 75; at. wt. 186.207; m.p. about 3,180℃; b.p. about 5,625℃; sp. gr. 21.02 at 20℃; valence −1, +2, +3, +4, +5, +6, or +7....

Trenton , cities, United States

(Encyclopedia)Trenton. 1 City (1990 pop. 20,586), Wayne co., SE Mich., on the Detroit River opposite Grosse Ile, in a farm area; settled 1816, inc. as a city 1957. An early river port, it has plants that make metal...

loudspeaker

(Encyclopedia)CE5 Electrodynamic loudspeaker loudspeaker or speaker, device used to convert electrical energy into sound. It consists essentially of a thin flexible sheet called a diaphragm that is made to vibr...

Lafayette

(Encyclopedia)Lafayette läˌfēĕtˈ, lăfˌēĕtˈ [key]. 1 City (1990 pop. 23,501), Contra Costa co., NW Calif., a residential suburb in the San Francisco–Oakland area; settled 1848, inc. 1968. The city is a h...

Cohen, Leonard Norman

(Encyclopedia)Cohen, Leonard Norman, 1934–2016, Canadian songwriter, singer, and poet, b. Montreal, B.A. McGill Univ., 1955. He initially wrote poetry, publishing his first collection, Let Us Compare Mythologies,...