Composer Sergei Rachmaninoff lent which Russian-born novelist money to come to the U.S. in 1940?

Which composer's last symphony, No. 104 in D major from 1795, is known as the "London"? Composer Benjamin Britten was born in 1913 in Lowestoft, in which English county? Composer Douglas Moore based his opera "The Wings of the Dove" on a 1902 novel by which author? Composer Mario Castelnuovo-Tedesco turned which Oscar Wilde comedy into an opera in 1962? Which composers are known as "the three Bs"? Computers that read "00" as which year needed fixing before 2000? In 1915 Arthur Conan Doyle wrote a tribute on the death of W.G. Grace, a superstar of which sport? The gravitational constant G, central to the law of gravitation published in 1687, is also known as whose constant?