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Inventions

Inventions
In which decade were the first successful diode and triode vacuum tubes invented?

1800s
1880s
1900s
1890s

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Inventions
What Thomas Davenport invented?

Screw propellor
Electric streetcar
Sleeping (railway) car
Chesterfield

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Inventions
Who among the following invented the small pox vaccine?

Robert Hooke
Louis Pasteur
Edward Jenner
Robert Koch

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Inventions
What invention was first installed at a Hartford, Connecticut bank in 1889?

Burglar alarm
Pay telephone
Automatic teller machine
Time-lock safe

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Inventions
What Enrico Fermi invented?

Nuclear reactor
X ray machine
Cyclotron
Betatron

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Inventions
What Sir Isaac Newton invented?

Microscope
Reflecting telescope
Spectacles
Chronometer

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