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welding

(Encyclopedia)welding, process for joining separate pieces of metal in a continuous metallic bond. Cold-pressure welding is accomplished by the application of high pressure at room temperature; forge welding (forgi...

water skiing

(Encyclopedia)water skiing, sport of riding on skis along the water's surface while being towed by a motorboat. It probably originated on the French Riviera in the early 1920s, and was known in the United States by...

Belém

(Encyclopedia)Belém pəräˈ [key], city, capital of Pará state, N Brazil, on the Pará River. Belém, th...

sodium carbonate

(Encyclopedia)sodium carbonate, chemical compound, Na2CO3, soluble in water and very slightly soluble in alcohol. Pure sodium carbonate is a white, odorless powder that absorbs moisture from the air, has an alkalin...

tent

(Encyclopedia)tent, portable shelter of canvas, skins, felt, matting, or other material usually supported by poles and used chiefly by nomads, hunters, and campers. Tents have been used by pastoral peoples since an...

manganese

(Encyclopedia)manganese măngˈgənēs, mănˈ– [key] [Lat.,=magnet], metallic chemical element; symbol Mn; at. no. 25; at. wt. 54.93805; m.p. about 1,244℃; b.p. about 1,962℃; sp. gr. 7.2 to 7.45, depending o...

metal

(Encyclopedia)metal, chemical element displaying certain properties by which it is normally distinguished from a nonmetal, notably its metallic luster, the capacity to lose electrons and form a positive ion, and th...

Göttingen

(Encyclopedia)Göttingen götˈĭng-ən [key], city, Lower Saxony, central Germany, on the Leine River. It is ...

Maputo

(Encyclopedia)Maputo məpo͞oˈtō [key], city (1997 pop. 966,837), capital of Mozambique, a port on the Indian Ocean. It is Mozambique's largest city and its administrative, communications, and commercial center. ...

tellurium

(Encyclopedia)tellurium tĕlo͝orˈēəm [key] [Lat.,=earth], semimetallic chemical element; symbol Te; at. no. 52; at. wt. 127.60; m.p. 450℃; b.p. 990℃; sp. gr. 6.24 at 20℃; valence −2, +4, or +6. Telluriu...