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21 mai 1734 - "Charles du Fay através de estudos sobre os experimentos de Gray, descobriu a existência de dois tipos de eletricidade, conhecidos hoje como positiva e negativa."

Ajouté au bande de temps:

Hist 2

4 déc. 2018

2

0

722

Date:

21 mai 1734

Maintenaint

~ Il y a 291 ans

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