'Mach One" refers to the speed of what?

More Questions:

What Christmas song's characters" eyes were made from coal?

Who was the first Russian woman to win a Wimbledon singles title?

Whose garden is infiltrated by Peter Rabbit?

What artist painted himself sketching on the far right edge of his painting "The Gross Clinic"?

Of the US states that border Mexico, which shares the shortest border?

Madison is the state capital of which US State situated on the Great Lakes?

Which US state is home to the Catskill Mountains?

What country did the Venetian blinds originate in?

Who played the role of Dr. Frankenstein in the 1974 movie "Young Frankenstein"?

Nicole Kidman voiced a character named Norma-Jean in what animated movie?

What is the name of the Japanese anime starring a wandering samurai with a cross shaped scar?

The "Sacred Order of the Stonecutters" was a fictional club in which TV show?

What did the Pony Express transport to California?

Which war did the Treaty of Portsmouth end in 1905?

What fruit is a cross between a blackberry and a red raspberry?