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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...

torpedo , in naval warfare

(Encyclopedia)torpedo, in naval warfare, a self-propelled submarine projectile loaded with explosives, used for the destruction of enemy ships. Although there were attempts at subsurface warfare in the 16th and 17t...

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...

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...

reggae

(Encyclopedia)reggae, Jamaican popular music that developed in the 1960s among Kingston's poor blacks, drawing on American “soul” music and traditional African and Jamaican folk music and ska (a Jamaican and Br...

Inver Grove Heights

(Encyclopedia)Inver Grove Heights, city (2020 pop. 36,092), Dakota co., SE Minn. A suburb of St. Paul, its manufactures include motor-vehicle and aircraft parts, asph...

pneumatic tool

(Encyclopedia)pneumatic tool no͝omătˈĭk [key], instrument activated by air pressure. Pneumatic tools are designed around three basic devices: the air cylinder, the vane motor, and the sprayer. The air cylinder ...

motorcycle

(Encyclopedia)motorcycle, motor vehicle whose design is based on the bicycle. The German inventor Gottlieb Daimler is generally credited with building the first practical motorcycle in 1885. The motorcycle did not ...

Hazelwood

(Encyclopedia)Hazelwood, city (2020 pop. 25,458), St. Louis co., E. Mo., a suburb of St. Louis; inc. as a village 1949, city charter approved 1969. Manufactures inclu...

Bountiful

(Encyclopedia)Bountiful, city (2020 pop. 43,893), Davis co., N central Utah; inc. 1892. It is a residential suburb N of Salt Lake City with some farming and floral nu...