This statesman, politican, scholar, inventor, and one of early presidents of USA invented the swivel chair, the spherical sundial, the moldboard plow, and the cipher wheel.
Dr. Hans von Ohain and Sir Frank Whittle are recognized as the co-inventors of the jet engine. Each was working separately and knew nothing of the others work. Although Whittle started first, von Ohain was first to design and develop a turbojet engine to power an aircraft.
Of the many honors received by both, the most significant honor was probably "The Charles Draper Prize" in 1992 which was given to both Hans von Ohain and Sir Frank Whittle for their efforts and contributions to aviation and mankind. "The Charles Draper Prize" is recognized as the equivalent to the Nobel Prize in technology.
What invention caused many deaths while testing it?
A.
Dynamite
B.
Ladders
C.
Race cars
D.
Parachute
Answer: Option D
Explanation:
Many people who tried to test the first parachutes died by jumping from high places. One attempt was a parachute hat, but the inventor broke his neck while testing it. The first successful parachute was tested from a hot air balloon in 1797, in France, by Jacques Garnerin.