How many spacetime dimensions does M-theory have? Answer with the whole number only.
In what year did Paul Dirac publish his relativistic equation for the electron? Answer with the four-digit year only.
In what year did the Chelyabinsk meteor explode over Russia? Answer with the four-digit year only.
What is the capital of Pakistan? Answer with the city name only.
How many flavors of lepton are there in the Standard Model? Answer with the whole number only.
In what year was Tata Airlines, which became Air India, founded? Answer with the four-digit year only.
In which country is the temple complex of Angkor Wat? Answer with the country name only.
What is the flag carrier airline of the Netherlands? Answer with the airline name only.
Whose constant, symbol h, relates a photon's energy to its frequency? Answer with the surname only.
The Celsius and Fahrenheit scales show the same reading at minus how many degrees? Answer with the number without the minus sign.
What is the highest mountain in North America? Answer with its official name only, one word.
Which airline alliance does British Airways belong to? Answer with the alliance's full name.
In what year did Henry Cavendish carry out his experiment to measure the density of the Earth? Answer with the four-digit year only.
In what year did Hayabusa2 return its asteroid Ryugu samples to Earth? Answer with the four-digit year only.
How many degrees of longitude does one standard time zone span? Answer with the whole number only.
Which airline operates the largest fleet of Airbus A380s? Answer with the airline name only.
In what year did the Airbus A380 enter commercial service? Answer with the four-digit year only.
What is the capital of Ethiopia? Answer with the city name only.
In what year did Erwin Schrodinger publish his wave equation? Answer with the four-digit year only.
In what year did Werner Heisenberg publish the uncertainty principle? Answer with the four-digit year only.
In what year did Japan Airlines Flight 123 crash, the deadliest single-aircraft accident? Answer with the four-digit year only.
