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Inventions

Inventions
In which decade was the transistor invented?

1960s
1980s
1940s
1950s

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Inventions
What J. B. Dunlop invented?

Rubber boot
Model airplanes
Automobile wheel rim
Pneumatic rubber tire

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Inventions
When was Milk Tray first introduced?

1934
1915
1923
1942

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Inventions
What Enrico Fermi invented?

X ray machine
Cyclotron
Nuclear reactor
Betatron

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Inventions
What Frank Whittle invented?

Sonar
Ethyl gasoline
Radar
Jet propulsion

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Inventions
Where was the yo-yo invented?

England
United States
France
Philippines

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