What is the standard mains frequency of the electricity grid in continental Europe, in hertz? Answer with the whole number only.
What is the four-letter acronym of Japan's national space agency? Answer with the acronym only.
In what year did the Airbus A320 enter commercial service? Answer with the four-digit year only.
In what year did SpaceX fly astronauts for the first time, on the Demo-2 mission? Answer with the four-digit year only.
In what year did Pan American World Airways cease operations? Answer with the four-digit year only.
Who commanded Apollo 13? Answer with the surname only.
In what year was the core module of the Mir space station launched? Answer with the four-digit year only.
Victoria Falls lies on which river? Answer with the river name only, without the word River.
What is the two-character IATA code of Swiss International Air Lines? Answer with the two-character code only.
In what year did Kazakhstan move its capital from Almaty to Astana? Answer with the four-digit year only.
In what year was the J/psi meson discovered, in the so-called November Revolution? Answer with the four-digit year only.
Norway is a member of the European Union. Answer true or false.
In what year did the Tunguska event flatten forest in Siberia? Answer with the four-digit year only.
In what year did NASA launch the uncrewed Artemis I mission? Answer with the four-digit year only.
In what year was Niels Bohr awarded the Nobel Prize in Physics? Answer with the four-digit year only.
How many neutrons are in the nucleus of carbon-12? Answer with the whole number only.
What is the largest freshwater lake in the world by surface area? Answer with the lake name only, without the word Lake.
In what year did Brasilia become the capital of Brazil? Answer with the four-digit year only.
What is the capital of Nigeria? Answer with the city name only.
How many hexagonal segments make up the James Webb Space Telescope's primary mirror? Answer with the whole number only.
In what year was the Nobel Prize in Physics awarded for the invention of efficient blue LEDs? Answer with the four-digit year only.
Which sea lies between Italy and the Balkan Peninsula? Answer with the sea name only, without the word Sea.
