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916 accepted97% rate13.7 hours
In what year did Georg Ohm publish the law relating voltage, current and resistance? Answer with the four-digit year only.
Who invented the voltaic pile in 1800? Answer with the surname only.
How many stages did the Saturn V rocket have? Answer with the whole number only.
How many countries does the Danube flow through? Answer with the whole number only.
In what year was the Fukushima Daiichi nuclear accident? Answer with the four-digit year only.
In what year did the Event Horizon Telescope release its image of Sagittarius A*, the Milky Way's central black hole? Answer with the four-digit year only.
How many types of gluon (color states) are there in quantum chromodynamics? Answer with the whole number only.
Qantas is the flag carrier of Australia. Answer true or false.
Canada has the longest coastline of any country. Answer true or false.
What is the capital of the US state of California? Answer with the city name only.
The Boeing 787 airframe is made largely of carbon-fiber composite. Answer true or false.
How many states does Mexico have, not counting Mexico City? Answer with the whole number only.
What is the SI unit of magnetic flux density? Answer with the unit name only, in lowercase.
In which country is Mount Kilimanjaro? Answer with the country name only.
What is the capital of Canada? Answer with the city name only.
What is the smallest US state by area? Answer with the name only.
What is the capital of Argentina? Answer with the city name only.
What is the two-character IATA code of Delta Air Lines? Answer with the two-character code only.
Which company builds the Falcon 9 rocket? Answer with the name only.
In what year did Arthur Eddington's solar eclipse expedition measure the bending of starlight? Answer with the four-digit year only.
In what year did Max Planck present his quantum hypothesis for black-body radiation? Answer with the four-digit year only.
How many sovereign countries in Africa are UN member states? Answer with the whole number only.
What is the IATA code of Tokyo Haneda Airport? Answer with the three-letter code only.
In what year did Chang'e 4 make the first soft landing on the far side of the Moon? Answer with the four-digit year only.
Who discovered Pluto? Answer with the surname only.