A B C D E F G H I J K L M N O P Q R S T U V W X Y Z More Biographies Don't see the biography you're looking for? Search 30,000+ biographies Biographies…
The system of checks and balances is an important part of the Constitution. With checks and balances, each of the three branches of government can limit the powers of the others. This way, no one…
(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…
(Encyclopedia) LuleälvLuleälvlüˈləĕlvˈ [key], river, c.275 mi (440 km) long, rising near the Norwegian border, Norrbotten prov., N Sweden, and flowing SE to the Gulf of Bothnia at Luleå. It has…
WHAT IS A HEAT ENGINE? WHAT IS AN INTERNAL COMBUSTION ENGINE? HOW DOES A STEAM ENGINE WORK? HOW DOES A JET ENGINE WORK? GASOLINE ENGINEBIOGRAPHY: FRANK WHITTLE English, 1907-1996 TURBINESFUEL…
(Encyclopedia) fetishfetishfĕtˈĭsh [key], inanimate object believed to possess some magical power. The fetish may be a natural thing, such as a stone, a feather, a shell, or the claw of an animal, or…
(Encyclopedia) tractor, in agriculture, vehicle used to pull such equipment as plows, cultivators, and mowers; to power stationary devices such as saws and winches; and to push snowplows and earth-…
ELECTRIC TRAINSBIOGRAPHY: NIKOLA TESLA American, 1856-1943FIND OUT MOREElectric motors make things move. They convert electrical power into mechanical power using electromagnetic attraction and…
DIESEL TANKER TRUCKELECTRIC CARSFIND OUT MOREVehicles use engines of different kinds to move people and cargo from place to place. Most cars and motorbikes have petrol engines, but vans and…
