Mach refers to the speed of what?

More Questions:

What holiday comes right before All Saints" Day?

What was H.G. Wells" first novel?

What year was Bram Stoker's novel "Dracula" published?

What literary work inspired Franz Ferdinand's "Love and Destroy" song?

What city is home to the headquarters of the Boeing Company?

The Benelux is a union in Western Europe that is comprised of what three neighboring countries?

The comma bacillus causes what disease?

What spectral class does our sun belong to?

Who's responsible for "The Ballad of A Well-Known Gun"?

Which English city was actor Stephen Fry born in?

Who won the first season of the TV series "American Idol"?

Who plays the role of Captain John Miller in the movie "Saving Private Ryan"?

What year did basketball become an official Olympic event?

In which country was Dominion Day celebrated until 1982?

Before Eddie Money became famous, what was his career?