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AIzaSyB4mHJ5NPEv-XzF7P6NDYXjlkCWaeKw5bc
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15 sept 1897 año - 1897 J.J. Thomson determined the charge to mass ratio of electrons.
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Kushaj DWIVEDI [08N02M]
28 nov 2018
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fecha:
15 sept 1897 año
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~ 128 years ago
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