Mop e voltaic pile: o que têm em comum

1. Passo 1. Mop — é feito de — Algodão. A mop is cotton strands.
2. Passo 2. Algodão — é material para — Vacuum cleaner. The dust bag is a cloth bag.
3. Passo 3. Vacuum cleaner — evoluiu para — Robot vacuum. An autonomous vacuum cleaner.
4. Passo 4. Robot vacuum — tem como parte — Lithium-ion battery. A battery.
5. Passo 5. Lithium-ion battery — evoluiu de — Lead–acid battery. The lithium-ion battery is the next generation of rechargeable chemical current sources, with higher specific energy.
6. Passo 6. Lead–acid battery — evoluiu de — Voltaic pile. Planté’s battery developed the idea of a chemical current source by making it rechargeable.

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