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torque

(Encyclopedia)torque, in physics, that which tends to change the rate of rotation of a body; also called the moment of force. The torque produced by rotating parts of an electric motor or internal-combustion engine...

turn and bank indicator

(Encyclopedia)turn and bank indicator, aircraft instrument containing one indicator to show turning, or rotation about the vertical axis, and another to show banking, or rotation about the longitudinal axis. The tw...

North Pole

(Encyclopedia)North Pole, northern end of the earth's axis, by convention at lat. 90°N. Because the earth's rotational axis wobbles slightly over time, the location where the northern end of the axis intersects th...

foot-pound

(Encyclopedia)foot-pound, abbr. ft-lb, unit of work or energy in the customary English gravitational system; it is the work done or energy expended by a force of 1 pound acting through a distance of 1 foot. It is e...

Justo, Agustín Pedro

(Encyclopedia)Justo, Agustín Pedro ägo͞ostēnˈ pāˈᵺrō ho͞osˈtō [key], 1876–1943, president of Argentina (1932–38). An army general, he rose to prominence (1922) as minister of war under Marcelo Torc...

torsion

(Encyclopedia)torsion, stress on a body when external forces tend to twist it about an axis. See strength of materials. ...

Teleki, Count Paul

(Encyclopedia)Teleki, Count Paul tĕˈlĕkĭ [key], 1879–1941, Hungarian premier (1920–21, 1939–41), geographer, and political writer. He studied law, political science, and geography at the Univ. of Budapest...

fold

(Encyclopedia)fold, in geology, bent or deformed arrangement of stratified rocks. These rocks may be of sedimentary or volcanic origin. Although stratified rocks are normally deposited on the earth's surface in hor...

aberration of starlight

(Encyclopedia)aberration of starlight, displacement of the apparent path of light from a star, resulting in a displacement of the apparent position of the star from its true position; discovered by the English astr...

Aristarchus of Samos

(Encyclopedia)Aristarchus of Samos ărˌĭstärˈkəs, sāˈmŏs [key], fl. c.310 b.c.–c.230 b.c., Greek astronomer and mathematician of the Alexandrian school. He is said to have been the first to propose a heli...