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sound

(Encyclopedia)CE5 Sound waves: An air pressure wave radiating outward from a loudspeaker is perceived as sound. sound, any disturbance that travels through an elastic medium such as air, ground, or water to be ...

Louisiana State University and Agricultural and Mechanical College

(Encyclopedia)Louisiana State University and Agricultural and Mechanical College, mainly at Baton Rouge; land-grant and state supported; coeducational; chartered 1853, opened as a state seminary 1860 near Alexandri...

American Academy and Institute of Arts and Letters

(Encyclopedia)American Academy and Institute of Arts and Letters, honorary academy of notable American artists, writers, and composers. The National Institute of Arts and Letters, founded in 1898, served as the par...

speed

(Encyclopedia)speed, change in distance with respect to time. Speed is a scalar rather than a vector quantity; i.e., the speed of a body tells one how fast the body is moving but not the direction of the motion. If...

stroboscope

(Encyclopedia)stroboscope strŏbˈəskōp [key], optical instrument for making a moving object appear to be slowed down or stationary. This effect is created by interrupting the observer's view so that the object i...

Allen, Woody

(Encyclopedia)Allen, Woody, 1935–, American actor, writer, and director, one of contemporary America's leading filmmakers, b. Brooklyn, N.Y., as Allen Stewart Konigsberg. Allen began his career writing for televi...

Chatsworth

(Encyclopedia)Chatsworth, estate, Derbyshire, central England, near Chesterfield. It is the seat of the dukes of Devonshire. Begun in 1552, the present Classical-style Chatsworth House was rebuilt in 1686. It has n...

mechanics

(Encyclopedia)mechanics, branch of physics concerned with motion and the forces that tend to cause it; it includes study of the mechanical properties of matter, such as density, elasticity, and viscosity. Mechanics...

Brown, John, Scottish essayist

(Encyclopedia)Brown, John, 1810–82, Scottish essayist. He was a physician. His writing was collected in Horae Subsecivae (3 vol., 1858–82), which included his unique picture of a dog, Rab and His Friends (1859)...

work

(Encyclopedia)work, in physics and mechanics, transfer of energy by a force acting to displace a body. Work is equal to the product of the force and the distance through which it produces movement. Although both fo...