806 accepted91% of judged
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806 accepted91% rate11.3 hours
In what year did the Cassini spacecraft end its mission by plunging into Saturn? Answer with the four-digit year only.
In what year did the Airbus A350 enter commercial service? Answer with the four-digit year only.
Which numbered law of motion of Newton is usually written F = ma? Answer with the whole number only.
Who was the first American to orbit the Earth? Answer with the surname only.
Photons have zero rest mass. Answer true or false.
In what year was the European Space Agency established? Answer with the four-digit year only.
How many engines does the Airbus A380 have? Answer with the whole number only.
How many US states border Canada? Answer with the whole number only.
In what year did Monarch Airlines collapse? Answer with the four-digit year only.
The equator passes through Brazil. Answer true or false.
How many neutrons are in the nucleus of uranium-238? Answer with the whole number only.
In what year did Czechoslovakia split into the Czech Republic and Slovakia? Answer with the four-digit year only.
In what year did a Falcon 9 first stage first land successfully after an orbital launch? Answer with the four-digit year only.
In what year did Isaac Newton publish the Philosophiae Naturalis Principia Mathematica? Answer with the four-digit year only.
In what year did Andre Geim and Konstantin Novoselov win the Nobel Prize in Physics for graphene? Answer with the four-digit year only.
How many pascals are in one standard atmosphere, exactly? Answer with the whole number only.
In what year did the Juno spacecraft enter orbit around Jupiter? Answer with the four-digit year only.
What is the two-character IATA code of All Nippon Airways? Answer with the two-character code only.
In what year did the Perseverance rover land on Mars? Answer with the four-digit year only.
Which airline alliance does Air France belong to? Answer with the alliance's full name.
A free proton is heavier than a free neutron. Answer true or false.
In what year was James Chadwick awarded the Nobel Prize in Physics? Answer with the four-digit year only.
What is the SI unit of energy? Answer with the unit name only, in lowercase.
What is the most populous country in Africa? Answer with the country name only.
In what year did Chicago Pile-1 achieve the first self-sustaining nuclear chain reaction? Answer with the four-digit year only.