Columbia Encyclopedia

Search results

500 results found

fifth force

(Encyclopedia)fifth force, postulated fifth basic force of nature (the four known forces of nature are gravity, electromagnetism, and the strong and weak interactions). Proposed in 1986 to account for gravitational...

Communist party, in the United States

(Encyclopedia)Communist party, in the United States, political party that espoused the Marxist-Leninist principles of communism. In 1945, Browder's policy was attacked as being one of the “right deviationism,�...

court system in the United States

(Encyclopedia)court system in the United States, judicial branches of the federal and state governments charged with the application and interpretation of the law. The U.S. court system is divided into two administ...

Reformed Church in the United States

(Encyclopedia)Reformed Church in the United States: see Evangelical and Reformed Church. ...

Reform party, in the United States

(Encyclopedia)Reform party, in the United States, political party founded in 1995 by H. Ross Perot as an alternative to the Democratic and Republican parties. The Reform party's aims originally included mandating h...

centripetal force and centrifugal force

(Encyclopedia)CE5 Centripetal and centrifugal forces: When a ball is swung in a circle at the end of a string, centripetal and centrifugal forces act as shown above. centripetal force and centrifugal force, act...

Surgeon General, United States

(Encyclopedia)Surgeon General, United States, former head of the U.S. Public Health Service, which is responsible for protecting the people's health (see public health). Since a 1986 reorganization, the surgeon gen...

Doolittle, James Harold

(Encyclopedia)Doolittle, James Harold, 1896–1993, American aviator, b. Alameda, Calif. After serving in World War I as a flier he returned to school and earned a Sc.D. from MIT. He then became noted for his speed...

Kingman Reef

(Encyclopedia)Kingman Reef, uninhabited reef, less than 1 sq mi (2.6 sq km), central Pacific, one of the Line Islands, 1,075 mi (1,730 km) SW of Honolulu. It was discovered by Americans in 1798 and annexed by the U...

Yeager, Chuck

(Encyclopedia)Yeager, Chuck (Charles Elwood Yeager) yāˈgər [key], 1923–2020, American aviator, b. Myra, W.Va. An ace fighter pilot during World War II, he was a military test pilot during the early postwar yea...