A Phon is a unit of what?

More Questions:

What is the first man-made object to circle the earth?

What's the only Grand Slam tennis event still played on grass?

What did God create on the fourth day?

Which US state is known as the “Land of Enchantment”?

On what sea is the Crimea?

What bay does the San Mateo bridge cross?

What is the lowest land point on Earth?

Approximately how many kilometers are there in a nautical mile?

A Sone is a unit of what?

Who is Homer Simpson's half-brother?

What saxophonist released the 1964 album "A Love Supreme"?

Which character did Evan Handler play on the TV show "Californication"?

What popular musician's last name is Norwood?

Who did Dwight Eisenhower defeat twice in presidential elections during the 1950s?

Who is the singer behind the albums "1989" and "Reputation"?