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zero

(Encyclopedia)zero, that number which, when added to any number, leaves the latter unchanged; its symbol is 0. The introduction of zero into the decimal system was the most significant achievement in the developmen...

absolute zero

(Encyclopedia)absolute zero, the zero point of the ideal gas temperature scale, denoted by 0 degrees on the Kelvin and Rankine temperature scales, which is equivalent to −273.15℃ and −459.67℉. For most gase...

Mostel, Zero

(Encyclopedia)Mostel, Zero mŏsˌtĕlˈ [key], 1915–77, American actor, b. New York City as Samuel Joel Mostel. Mostel made his Broadway debut in Keep 'Em Laughing (1942). A comic actor with an expressive face, h...

Vigo, Jean

(Encyclopedia)Vigo, Jean zhäN vēgōˈ [key], 1905–34, French movie director, whose original name was Jean Almereyda. His reputation is based on two superb films: Zéro de Conduite (1933) and L'Atalante (1934, u...

galactic coordinate system

(Encyclopedia)galactic coordinate system, astronomical coordinate system in which the principal axis is the galactic equator (the intersection of the plane of the Milky Way with the celestial sphere) and the refere...

numeral

(Encyclopedia)numeral, symbol denoting anumber. The symbol is a member of a family of marks, such as letters, figures, or words, which alone or in a group represent the members of a numeration system. The earliest ...

superfluidity

(Encyclopedia)superfluidity, tendency of liquid helium below a temperature of 2.19K to flow freely, even upward, with little apparent friction. Helium becomes a liquid when it is cooled to 4.2K. Special methods...

harmonic motion

(Encyclopedia)CE5 Harmonic motion is exhibited by a weight vibrating on the end of a spring. In A, the displacement of the object from its equilibrium position and the acceleration of the object are at a maximum...

Gibson, William

(Encyclopedia)Gibson, William, 1948–, Canadian science fiction writer, b. Conway, S.C., moved to Canada in the 1960s. He first published short stories in sci-fi magazines; many are collected in Burning Chrome (19...

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...