'Mach One" refers to the speed of what?

More Questions:

What type tree gets its name from the Japanese word meaning "plant in a shallow tray"?

What is philography?

What is the highest musical note on a standard 88-key piano?

Which was the first suspension bridge over the River Thames in London?

Squid, octopus and cuttlefish are all types of what class?

What element are diamonds made of?

Who won an Oscar for her performance in "Mary Poppins"?

Who directed the 1995 film "Boys on the Side"?

What is the name of the rabbit in the 1942 film, "Bambi"?

What CBS sitcom aired Monday nights at 9 pm, from 1951 to 1957?

Whose sidekick was named Pedro Sanchez?

How many Oscar nominations did the 1995 movie "Apollo 13" receive?

Who were the first people to separate copper from its ore?

Archbishop Makarios of Cyprus was exiled in 1956 to where?

Which king decided to transform Versailles into a royal court in 1661?