Ralph Samuelson was only 18 when he invented this sporting item in 1922. What was that?
A:
Golf tee
B:
Motorboat
C:
Water skis
D:
Hang glider
Answer:C
The new item was first used on Lake Pepin in Minnesota.
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What invention was first installed at a Hartford, Connecticut bank in 1889?
A:
Automatic teller machine
B:
Time-lock safe
C:
Burglar alarm
D:
Pay telephone
Answer:D
William Gray, inventor of the pay telephone, also invented the inflatable chest protector worn by baseball umpires and catchers.
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What Henry Bessemer invented?
A:
Aluminum
B:
Electroplating
C:
Steel Converter
D:
Steel rolling mill
Answer:C
Invented in 1856.
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What Igor Sikorsky invented?
A:
Hydroplane
B:
Jet engine airplane
C:
Helicopter
D:
Glider
Answer:C
Invented in 1939.
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In which decade was the transistor invented?
A:
1940s
B:
1950s
C:
1960s
D:
1980s
Answer:A
On December 23, 1947, William Shockley, Walter Brattain and John Bardeen, of Bell Labs, announced their discovery of the point-contact germanium transistor to management.
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