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indicators, acid-base

(Encyclopedia)indicators, acid-base, organic compounds that, in aqueous solution, exhibit color changes indicative of the acidity or basicity of the solution. Common indicators include p-nitrophenol, which is color...

Vandenberg Air Force Base

(Encyclopedia)Vandenberg Air Force Base, U.S. military installation, 3,456 acres (1,399 hectares), SW Calif., near Lompoc; chief Pacific coast launch site for military satellites, and headquarters of the U.S. Space...

Joint Base McGuire-Dix-Lakehurst

(Encyclopedia)Joint Base McGuire-Dix-Lakehurst, U.S. military base, central N.J., SE of Trenton; est. 1917 as Camp Dix and named for U.S. statesman John A. Dix. In 1939 it was made a permanent garrison and renamed ...

Wright-Patterson Air Force Base

(Encyclopedia)Wright-Patterson Air Force Base, U.S. military installation, 8,023 acres (3,247 hectares), W Ohio, NE of Dayton; est. 1917. One of the largest airport installations in the world, it is the air force's...

Warner Robins

(Encyclopedia)Warner Robins, city (1990 pop. 43,726), Houston co., central Ga., in an agricultural region; inc. 1943. The surrounding area yields peanuts, grain, fruit, and livestock. There is diverse manufacturing...

pyramid, in geometry

(Encyclopedia)CE5 Pyramid pyramid, in geometry, solid figure bounded by a polygon (the base, or directrix) and the surface generated by a moving line (the generator) passing through a fixed point (vertex) and c...

Fort Bragg

(Encyclopedia)Fort Bragg, U.S. army base, 11,136 acres (4,507 hectares), E N.C., N of Fayetteville; est. 1918. Originally an artillery post, it is now the principal U.S. army airborne-training center and the site o...

exponent

(Encyclopedia)exponent, in mathematics, a number, letter, or algebraic expression written above and to the right of another number, letter, or expression called the base. In the expressions x2 and xn, the number 2 ...

Cavite

(Encyclopedia)Cavite kävēˈtā [key], city, Cavite prov., SW Luzon, the Philippines. The city, situated o...

neutralization

(Encyclopedia)neutralization, chemical reaction, according to the Arrhenius theory of acids and bases, in which a water solution of acid is mixed with a water solution of base to form a salt and water; this reactio...