What Enrico Fermi invented?
Answer: D
Enrico Fermi built the first nuclear reactor.
Chicago Pile-1, a stack of graphite blocks and uranium, went critical on 2 December 1942 under the stands of the university's squash court - the first self-sustaining nuclear chain reaction. The message sent was that the Italian navigator had landed in the new world.
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In which year was MIDI introduced?
Answer: B
MIDI was introduced in 1983.
The Musical Instrument Digital Interface let synthesisers from different makers control one another. It was demonstrated at the NAMM show that January and has remained compatible ever since - a 1983 instrument can still talk to one made today.
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Where was the yo-yo invented?
Answer: C
The yo-yo came from the Philippines.
It was a Filipino toy and possibly a hunting weapon; Pedro Flores brought it to the United States in the 1920s and began manufacturing there, and the word is Filipino. Similar toys are known from ancient Greece and China.
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Who invented Jet Engine?
Answer: A
Sir Frank Whittle invented the jet engine.
The RAF officer patented the turbojet in 1930 at twenty-three, and his engine first flew in the Gloster E.28/39 in 1941. Hans von Ohain in Germany developed one independently, and his flew first, in 1939.
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What invention caused many deaths while testing it?
Answer: D
The parachute cost many lives in testing.
Early inventors jumped from towers and balloons to prove their designs. Franz Reichelt, a tailor, died in 1912 leaping from the Eiffel Tower in a wearable parachute of his own making, an attempt that was filmed.
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In which decade were the first successful diode and triode vacuum tubes invented?
Answer: D
They were invented in the 1900s.
John Ambrose Fleming patented the diode valve in 1904 and Lee de Forest added a third electrode to make the triode in 1906. The triode could amplify, which made radio, long-distance telephony and eventually electronic computing possible.
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When was the game Frisbee invented?
Answer: C
It goes back to the 1870s.
Students at Yale threw the empty pie tins of the Frisbie Baking Company of Bridgeport, Connecticut, calling out the name as a warning. Walter Morrison made a plastic version in 1948, and Wham-O adopted the old name in 1958.
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When were bar code scanners invented?
Answer: C
They were invented in the 1970s.
The bar code itself was patented in 1952, but no scanner could read it cheaply until the laser arrived. The first commercial scan was made at a supermarket in Troy, Ohio, in June 1974 - a packet of chewing gum.
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The hovercraft travels over land and water. Who invented it?
Answer: D
Christopher Cockerell invented it.
The British engineer worked out in 1955 that a ring of air blown downward would trap a cushion beneath a craft, testing the idea with two tin cans and a hair dryer. The SR.N1 crossed the Channel in 1959.
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When was the first lawn mower invented?
Answer: A
The first lawn mower was invented in 1830.
Edwin Budding, an engineer in a Gloucestershire cloth mill, adapted the rotary cutter used to trim the nap on cloth. Before it, grass was cut with a scythe or grazed by sheep.
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