Hydropower is electricity generated using the energy of moving water. Rain or melted snow, usually ____ (1) in hills and mountains, create ____ (2) and rivers that eventually run to the ocean. The energy of that moving water can be substantial, as anyone who has been whitewater rafting knows. Humans have been taking advantage of this source of energy for centuries. Farmers since the ancient Greeks have used water ____ (3) to grind wheat into flour. Placed in a river, a water wheel picks up flowing water in buckets located around the wheel. The kinetic energy of the flowing river turns the wheel and is converted ____ (4) mechanical energy that runs the mill. In the late 19th century, hydropower became a source for generating electricity. The first hydroelectric power plant was built at Niagara Falls in 1879. In 1881, street ____ (5) in the city of Niagara Falls were powered by hydropower. In 1882, the world's first hydroelectric power plant began operating in the United States in Appleton, Wisconsin. |
Wheels. Solo 22% degli utenti ha risposto correttamente |
Risposta tratta da : Lingua inglese Ministero dell'Interno Quiz - Concorso per 250 funzionari amministrativi a tempo indeterminato, da destinare esclusivamente alle Commissioni territoriali per il riconoscimento della protezione internazionale ed alla Commissione nazionale per il diritto d'asilo |
di seguito le risposte errate:
Engines.
Robots.
Purity.