Optical disc storage 'DVD' was invented and developed by
Answer: D
All of these took part.
The DVD was agreed in 1995 when two rival formats - the MultiMedia CD of Sony and Philips and the Super Density disc of Toshiba, Panasonic and others - were merged into a single standard under pressure from the computer industry.
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Fluxgate magnetometer was invented by
Answer: C
Victor Vacquier invented it.
He developed the fluxgate magnetometer in the 1930s; it was used in the war to detect submarines from the air, and afterwards to map the magnetic stripes of the sea floor that confirmed sea-floor spreading.
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Who invented the mercury thermometer?
Answer: C
Daniel Fahrenheit invented it.
He made the first mercury thermometer in 1714, mercury being better than alcohol because it expands evenly and does not boil until 357 °C. He devised his scale with the same instrument.
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Which vehicle was invented about 3000 BCE?
Answer: D
It was the chariot.
The spoked-wheel chariot appeared on the Eurasian steppe about 2000 BC, and solid-wheeled carts a thousand years earlier. It transformed warfare, and remained the fastest thing on land for two thousand years.
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Who invented waterproof rubberised cloth?
Answer: D
Charles Macintosh invented it.
The Glasgow chemist found in 1823 that naphtha, a waste product of the gasworks, dissolved rubber, and sandwiched the solution between two layers of cloth. The waterproof coat still bears his name, with an added k.
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Which laboratory instrument for measuring the acidity or alkalinity of a liquid was invented by its designer in the 1930s?
Answer: D
It is the pH meter, invented by Arnold Beckman.
He built it in 1934 for a Californian citrus grower who needed to measure the acidity of lemon juice, using a vacuum-tube amplifier to read the tiny voltage from a glass electrode. It founded Beckman Instruments.
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Nuclear fission was discovered in experiment in
Answer: A
It was discovered in 1938.
Otto Hahn and Fritz Strassmann found barium among the products of neutron-bombarded uranium in December 1938. Lise Meitner and Otto Frisch explained it as the nucleus splitting, and gave the process its name.
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Mail-order cataloguing, the flexible urinary catheter, the first pair of bifocals, wooden swim fins, the lightning rod and the glass armonica are the inventions of
Answer: D
They are Benjamin Franklin's.
He also invented the Franklin stove and the lightning rod, and refused to patent any of them, holding that as we enjoy great advantages from the inventions of others we should be glad to serve others by any invention of ours.
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Who invented the microwave oven?
Answer: A
Percy Spencer invented it.
An engineer at Raytheon, he noticed in 1945 that a chocolate bar in his pocket had melted while he stood near an active magnetron. He tried popcorn next, then an egg, which exploded. Raytheon sold the first Radarange in 1947.
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In which year was Facebook founded?
Answer: A
It was founded in 2004.
Mark Zuckerberg launched thefacebook.com from his Harvard dormitory in February 2004. It opened to other universities within months and to anyone over thirteen in 2006.
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