Mach refers to the speed of what?

More Questions:

Who was the first female to be featured on the front of a Wheaties box?

What year was the AeroPress invented?

Where do you end up if you fly toward the second star to the right and then proceed straight on until morning?

What superteam includes Angel, Beast, Cyclops, Iceman and Marvel Girl?

In what novel would you find the character known as the Artful Dodger?

Who wrote the novel "1984"?

What city is often mistakenly referred to as the "Lost City of the Incas"?

What was Malawi formerly known as?

Dhaka is the capital of which country?

Coal is predominantly made up of which element?

What country provided most of the settings for "The Lord of the Rings" movies?

Who was the first musical host of "Saturday Night Live"?

In what year was Harvard University founded?

What was completed in 1869 at Promontory, Utah?

Who had 1960's hits with "Glad All Over" and "Bits and Pieces"?