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Who discovered the process of vulcanization?

Charles Goodyear

John Boyd Dunlop

Edouard Michelin

Giovanni Battista Pirelli

Charles Goodyear for many years improved the method of hardening the rubber. When he succeeded in 1839, investors were already offended by earlier failures. Charles died in misery. The Goodyear company was named in his honor, but otherwise is not related to him.

GabrielBaran

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18%

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12

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49

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6%

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15

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19%

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182

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12

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49

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35

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31%

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16

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24%

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313

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351

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12927

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100

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49

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25

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10

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11

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52%

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17

Which tires are made of the softest rubber?

all-season tires

all have the same hardness

Where does the Bridgestone Corporation, maker of the Bridgestone tires, come from?

the United States

the United Kingdom

Which consumer electronics manufacturer also produced tires?

How many countries is Elizabeth II a monarch of?