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vibration

(Encyclopedia)vibration, in physics, commonly an oscillatory motion—a movement first in one direction and then back again in the opposite direction. It is exhibited, for example, by a swinging pendulum, by the pr...

camera

(Encyclopedia)CE5 Image formed by a camera camera, lightproof box or container, usually fitted with a lens, which gathers incoming light and concentrates it so that it can be directed toward the film (in an opt...

simple harmonic motion

(Encyclopedia)simple harmonic motion: see harmonic motion. ...

perpetual-motion machine

(Encyclopedia)perpetual-motion machine, device that would be able to operate continuously and supply useful work, in violation of the laws of thermodynamics. A machine that would produce more energy in the form of ...

Burbank

(Encyclopedia)Burbank, city (2020 pop.107,337), Los Angeles co., S Calif.; inc. 1911. Tourism and the entertainment industry are central to its economy; several motio...

Sander, August

(Encyclopedia)Sander, August ouˈgo͝ost zänˈdər [key], 1876–1964, Austrian photographer. During his long life Sander made a remarkable composite portrait of the German people. He began his immense work in the...

Wood, Robert Williams

(Encyclopedia)Wood, Robert Williams, 1868–1955, American physicist, b. Concord, Mass., grad. Harvard (B.A., 1891). After studying abroad he became associated with Johns Hopkins as professor of experimental physic...

Long Island Sound

(Encyclopedia)Long Island Sound, arm of the Atlantic Ocean, c.90 mi (145 km) long and 3–20 mi (5–32 km) wide, separating Long Island, N.Y., from the SE New York mainland and Connecticut. On the W the East River...

Prince William Sound

(Encyclopedia)Prince William Sound, large, irregular, islanded inlet of the Gulf of Alaska, S Alaska, E of the Kenai peninsula. It has many bays and good harbors; the large Columbia Glacier flows into Columbia Bay,...

Port Royal Sound

(Encyclopedia)Port Royal Sound, arm of the Atlantic Ocean, between St. Helena and Parris islands to the north and Hilton Head Island to the south, in S S.C.; it receives the Broad River. The sound was named in 1562...