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Gramme, Zénobe-Théophile
(Encyclopedia)Gramme, Zénobe-Théophile zānôbˈ tāôfēlˈ gräm [key], 1826–1901, Belgian electrical engineer. While working as a model maker for a Parisian manufacturer of electrical devices, Gramme became ...light
(Encyclopedia)light, visible electromagnetic radiation. Of the entire electromagnetic spectrum, the human eye is sensitive to only a tiny part, the part that is called light. The wavelengths of visible light range ...Ely, Isle of
(Encyclopedia)Ely, Isle of, region, Cambridgeshire, E central England. Ely is the chief town. The region has extensive fens, drained and devoted to the cultivation of sugar beets and vegetables. Pigs and poultry ar...Simon Magus
(Encyclopedia)Simon Magus māˈgəs [key], Samaritan sorcerer who attempted to buy spiritual power from the apostles. From this comes the term simony. He is mentioned in the Acts of the Apostles. He was said to hav...watt
(Encyclopedia)watt [for James Watt], abbr. W, unit of power, or work done per unit time, equal to 1 joule per second. It is used as a measure of electrical and mechanical power. One watt is the amount of power that...commutator
(Encyclopedia)commutator, device used in an electric generator to convert the alternating current produced in the generator into direct current before the current is sent into an external circuit; it is basically a...Mark, Gospel according to
(Encyclopedia)Mark, Gospel according to, 2d book of the New Testament. The shortest of the four Gospels and probably the earliest, it is usually thought to have been composed shortly before the destruction of the T...mass spectrograph
(Encyclopedia)mass spectrograph, device used to separate electrically charged particles according to their masses; a form of the instrument known as a mass spectrometer is often used to measure the masses of isotop...governor, device
(Encyclopedia)governor, automatic device used to regulate and control such variables as speed or pressure in the functioning of an engine or other machine. A governor may be an electric, hydraulic, or mechanical de...electromagnet
(Encyclopedia) CE5 Electromagnet electromagnet, device in which magnetism is produced by an electric current. Any electric current produces a magnetic field, but the field near an ordinary straight conductor is ...Browse by Subject
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