Física
Autor: M112-Nilópolis | Publicado: 2011-09-29T21:59:00-03:00

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 <![endif]-->  Energia CinéticaEssa energia é chamada de energia do movimento, pois está associada a o movimento do Corpo. Um exemplo de um meio de produzir essa energia é a Hidrelétrica.
Energia Renovável&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 
Existe muitas maneiras de fazer energia sem prejudicar o meio ambiente como:·&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Energia hidráulica·&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Energia fóssil·&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Energia solar·&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Energia de biomassa·&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Energia eólica·&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Energia nuclear·&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Energia geotérmica·&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Energia gravitacionalDestacando uma dessas vou falar da energia hidráulica. Essa energia é feita nas usinas hidrelétricas. A energia hidrelétrica é a obtenção de energia elétrica através do aproveitamento do potencial hidráulico de um rio. Para que esse processo seja realizado é necessária a construção de usinas em rios que possuam elevado volume de água e que apresentem desníveis em seu curso.

A força da água em movimento é conhecida como energia potencial, essa água passa por tubulações da usina com muita força e velocidade, realizando a movimentação das turbinas. Nesse processo, ocorre a transformação de energia potencial (energia da água) em energia mecânica (movimento das turbinas). As turbinas em movimento estão conectadas a um gerador, que é responsável pela transformação da energia mecânica em energia elétrica.

Normalmente as usinas hidrelétricas são construídas em locais distantes dos centros consumidores, esse fato eleva os valores do transporte de energia, que é transmitida por fios até as cidades.

A eficiência energética das hidrelétricas é muito alta, em torno de 95%. O investimento inicial e os custos de manutenção são elevados, porém, o custo do combustível (água) é nulo.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;