Misc: In which sport was Argentinian Juan Fangio associated?

Questions

What object,later named Eureka was found by children in the dust at Hopetown in South Africa?

What do we call the first visitor after midnight on New Years Eve?

What in sound reproduction is the name of a slow fluctuation in pitch?

By what nickname was George Brummell usually known?

Which driver won the British Grand Prix four years running from 1962 to 1965?