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wave, in the earth sciences

(Encyclopedia) CE5 A. Diagram of wave: Wave travels one wavelength during one period B. Diagram of wave: Phase relationships wave, in oceanography, an oscillating movement up and down, of a body…

Waves

(Encyclopedia) Waves (Women Appointed for Voluntary Emergency Service), U.S. navy organization, created (1942) in World War II to release male naval personnel for sea duty. The organization was…

Brewer's: Wave

The ninth wave. A notion prevails that the waves keep increasing in regular series till the maximum arrives, and then the series begins again. No doubt…

Breaking the Waves

Director/Writer: Lars von Trier Director of Photography: Robby Müller Editor: Anders Refn Music: Ray Williams Production Designer: Karl Juliusson Producers: Vibeke…

short waves

(Encyclopedia) short waves, radio waves whose frequencies range from about 3 to 25 megahertz (Mhz), corresponding roughly to the high-frequency band (see radio frequency). When they impinge on…

Brewer's: Tenth Wave

It is said that every tenth wave is the biggest. (See Wave.) “At length, tumbling from the Gallic coast, the victorious tenth wave shall ride, like the boar, over all the rest.” —Burke.…

Droughts and Heat Waves

The biggest droughts and heat waves since the 1930s 1930s Many states: longest drought of the 20th century.…

coherence

(Encyclopedia) coherence, constant phase difference in two or more Waves over time. Two waves are said to be in phase if their crests and troughs meet at the same place at the same time, and the…

Hertz, Heinrich Rudolf

(Encyclopedia) Hertz, Heinrich RudolfHertz, Heinrich RudolfGer. hīnˈrĭkh r&oomacr;ˈdôlf [key]Hertz, Heinrich Rudolf hĕrts [key], 1857–94, German physicist. He confirmed J. C. Maxwell's…

ultrasonics

(Encyclopedia) ultrasonics, study and application of the energy of sound waves vibrating at frequencies greater than 20,000 cycles per second, i.e., beyond the range of human hearing. The application…