Water clock (clepsydra) e rede elétrica: o que têm em comum

1. Passo 1. Water clock (clepsydra) — utiliza — Gravity flow. Water flows out at a constant rate under gravity.
2. Passo 2. Gravity flow — é utilizado em — Water turbine. It is turned by falling water.
3. Passo 3. Water turbine — faz parte de — Hydroelectric power station. Water turbines.
4. Passo 4. Hydroelectric power station — é um tipo de — Power station. A kind of power station.
5. Passo 5. Power station — faz parte de — Rede elétrica. Power stations feed the grid.

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