A Phon is a unit of what?

More Questions:

What year was boxer Arnold Raymond Cream born in?

The soft drink Mr. Pibb was introduced as a competitor to which popular soft drink?

What cave, found in central Kentucky, is the world's longest cave system?

What duo is credited with the discovery of the planet Neptune?

What is the square root of one-quarter?

Mexican laetrile is extracted from the seeds of what fruit?

Which TV series was set in Walnut Grove, Minnesota?

What year was Alfred Hitchcock born?

What actor/singer played the role of Right Arm in the 1997 movie "The Fifth Element"?

The movie "Reservoir Dogs" marked the directorial debut of whom?

What were Moe Howard, Larry Fine and Curly Howard better known as?

What union did Jimmy Hoffa head until his 1975 disappearance?

The fortification at West Point were originally built during what war?

The plane carrying what country’s national rugby team crashed on Friday, October 13, 1972?

Which brothers published the storybook entitled "Children's and Household Tales" in the 19th century?