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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...

Rankine temperature scale

(Encyclopedia)Rankine temperature scale, temperature scale having an absolute zero, below which temperatures do not exist, and using a degree of the same size as that used by the Fahrenheit temperature scale. Absol...

Celsius temperature scale

(Encyclopedia)Celsius temperature scale sĕlˈsēəs [key], temperature scale according to which the temperature difference between the reference temperatures of the freezing and boiling points of water is divided ...

Natural Bridges National Monument

(Encyclopedia)Natural Bridges National Monument, 7,636 acres (3,093 hectares), SE Utah; est. 1908. Located in an area of colored cliffs and box canyons, the monument contains three huge natural sandstone bridges: O...

Oberalp

(Encyclopedia)Oberalp ōˈbər-älp [key], Alpine pass, 6,733 ft (2,052 m) high, between Grisons and Uri cantons, S central Switzerland. Oberalpsee, a small lake, is nearby, and the Alpine peak Oberalpstock, 10,926...

superconductivity

(Encyclopedia)superconductivity, abnormally high electrical conductivity of certain substances. The phenomenon was discovered in 1911 by Heike Kamerlingh Onnes, who found that the resistance of mercury dropped sudd...

Geneva, canton and city, Switzerland

(Encyclopedia)Geneva jənēˈvə [key], Fr. Genève, canton, 109 sq mi (282 sq km), SW Switzerland, surroun...

open enrollment

(Encyclopedia)open enrollment, a policy of admitting to college all high-school graduates in an effort to provide a higher education for all who desire it. To critics it means an inevitable lowering of standards as...

McKinney

(Encyclopedia)McKinney, city (1990 pop. 21,283), seat of Collin co., N Tex.; inc. 1849. It is a shipping point for cotton, cattle, and grains. Manufacturing includes electronic equipment, leather and food products,...

nadir

(Encyclopedia)nadir nāˈdər [key] [Arab.,=opposite], in astronomy, the point on the celestial sphere directly opposite the zenith, i.e., directly beneath the observer. ...