[Documentaire] So You Want to Be an Inventor (en anglais)

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So You Want to Be an Inventor (en anglais)

George, Judith

HistoriqueDocumentaireLivres en anglais

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Question 1

How old was Ben Franklin when he invented the bifocals?

He was seventy-seven.

He was fifty-three.

He was sixty-one

Question 2

What year did Igor Sikorsky take off in his helicopter?

in 1931

in 1939

in 1937

Question 3

Who invented the safety-brake?

Elisha Otis

Joe Cochrone

Eli Whitney

Question 4

Who invented alone?

Alexander Graham Bell

Nikola Tesla

Thomas Edison

Question 5

What was not a failed invention?

movable type

haircutting helemt

eyeglasses for chickens