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hydroelectricity

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hydroelectricity Electricity generated from the motion of water. In all installations, this energy of movement, or kinetic energy, is first converted into mechanical energy in the spinning blades of a water turbine, and then into electricity by the spinning rotor of a generator. Many power stations are driven by water held back by large dams to regulate flow, such as the Hoover Dam in the USA. Hydroelectric power (HEP) provides cheap energy for mountainous areas with high rainfall.

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© World Encyclopedia 2005, originally published by Oxford University Press 2005.

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