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Water wheel. A water wheel is a machine for converting the energy of flowing or falling water into useful forms of power, often in a watermill. A water wheel consists of a wheel (usually constructed from wood or metal), with a number of blades or buckets arranged on the outside rim forming the driving car.
Van de Graaff generator. A Van de Graaff generator is an electrostatic generator which uses a moving belt to accumulate electric charge on a hollow metal globe on the top of an insulated column, creating very high electric potentials. It produces very high voltage direct current (DC) electricity at low current levels.
Interactive geometry software (IGS) or dynamic geometry environments (DGEs) are computer programs which allow one to create and then manipulate geometric constructions, primarily in plane geometry. In most IGS, one starts construction by putting a few points and using them to define new objects such as lines, circles or other points.
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The Pelton wheel or Pelton Turbine is an impulse -type water turbine invented by American inventor Lester Allan Pelton in the 1870s. [ 1][ 2] The Pelton wheel extracts energy from the impulse of moving water, as opposed to water's dead weight like the traditional overshot water wheel. Many earlier variations of impulse turbines existed, but ...
Lottery machine. A lottery machine is the machine used to draw the winning numbers for a lottery . Early lotteries were done by drawing numbers, or winning tickets, from a container. In the UK, numbers of winning Premium Bonds (which were not strictly a lottery, but very similar in approach) were generated by an electronic machine called ERNIE .
Bargain Hunters (1987) The Baron and the Bee (1953–1954) Battle Dome (1999–2001) Battle of the Ages (1952) Battle of the Ages (2019; unrelated to above) Battle of the Network Stars (1976–1985, 1988, 2003, 2017) Battle of the Sexes (1938–1943) Battlestars (1981–1982) and its revival, The New Battlestars (1983) Beach Clash (1994–1995)
Electronic keyboards include synthesizers, digital pianos, stage pianos, electronic organs and digital audio workstations. In technical terms, an electronic keyboard is a rompler -based synthesizer with a low-wattage power amplifier and small loudspeakers . Electronic keyboards offer a diverse selection of instrument sounds ( piano, organ ...