General science

General science

A variety of science subjects concerning the fundamental knowledge about different aspects of our world and their underlying principles.

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General science

A crustacean within the Malacostraca: Peracarida. All have a well-developed carapace which is fused dorsally with at least the first three thoracic somites and which overhangs the sides to enclose a ...

granite

Science; General science

A crystalline igneous rock that consists largely of alkali feldspar (typically perthitic microcline or orthoclase), quartz, and plagioclase (commonly calcic albite or oligoclase). Its average grain ...

magnetite

Science; General science

A cubic mineral and member of the spinel structure type, space group Fd3m, with composition (Fe 3+ ) IV (Fe 2+ Fe 3+ ) VI O 4 . It possesses the inverse spinel structure, in which half the ferric ...

current sources and mirrors

Science; General science

A current source is an electronic circuit that generates a constant direct current which flows into or out of a high-impedance output node. A current mirror is an electronic circuit that generates a ...

cryotron

Science; General science

A current-controlled switching device based on superconductivity for use primarily in computer circuits. The early version has been superseded by the tunneling cryotron, which consists basically of a ...

lemniscate of bernoulli

Science; General science

A curve shaped like the figure eight (see illus. ), referred to by Jacques Bernoulli in 1694. Let F 1 , F 2 be points of a plane π, with F 1 F 2 = 2 a , a > 0. The locus of a ...

cycloid

Science; General science

A curve traced in the plane by a point on a circle that rolls, without slipping, on a line. If the line is the x axis of a rectangular coordinate system, at whose origin O the moving point P ...