Columbia Encyclopedia

(Encyclopedia) Annapolis ənăpˈəlĭs [key], city (2020 pop. 40,812), state capital and seat of Anne Arundel co., central Md., on the south bank of the Severn River. Annapolis is a por...

(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...

(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...

(Encyclopedia) Aurora ərôrˈə, ô– [key]. 1 City (2020 pop. 386,261), Adams and Arapahoe counties, N central Colo., a growing suburb on the east side of Denver; inc. 1903. Founded d...

(Encyclopedia)  CE5 Air-cushion vehicle: In vehicles modified with a trunk or skirt (A), the rate of leakage is reduced and less power is needed to maintain the cushion. Vehicles designed to travel over deep water...

(Encyclopedia) Holocaust Memorial Museum, United States, in Washington, D.C. on the National Mall, memorial to the victims of the Holocaust. Designed by architect James Ingo Freed, it opened in 1993. Using a stark, ...

(Encyclopedia) Dover. 1 City (2020 pop. 39,403), state capital, and seat of Kent co., central Del., on the St. Jones River; founded 1683 on orders of William ...

(Encyclopedia) air: see atmosphere; liquid air; ventilation. ...

(Encyclopedia) Moreno Valley mərēˈnō [key], city (1990 pop. 118,779), Riverside co., S Calif., inc. 1984. In 1990, Moreno Valley was California's fastest-growing city, with a population increase of more than 300...

(Encyclopedia) Posse Comitatus Act, 1878, U.S. federal law that makes it a crime to use the military as a domestic police force in the United States under most circumstances. The law was designed to end the use of f...