Water tower e voltaic pile: o que têm em comum

1. Passo 1. Water tower — tem como parte — Bomba centrífuga. Filled by pumps.
2. Passo 2. Bomba centrífuga — faz parte de — Liquid-propellant rocket engine. Turbopumps deliver the propellant.
3. Passo 3. Liquid-propellant rocket engine — utiliza — Hydrogen. Hydrogen is an efficient fuel.
4. Passo 4. Hydrogen — utiliza — Eletrólise. Hydrogen is produced by electrolysis of water.
5. Passo 5. Eletrólise — evoluiu de — Voltaic pile. The first electrolysis of water was powered by a voltaic pile.

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