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F facts & stats

7 fact-checked facts about the letter f in science, music and everyday symbols, each with the reason behind it. 5 more are in today's round and join this page after it closes.

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The basics

The temperature unit written as °F is named for whom?

AnswerDaniel Fahrenheit

The Fahrenheit scale is named for physicist Daniel Gabriel Fahrenheit.

F is which letter of the English alphabet?

Answer6th

A, B, C, D, E, F: F is the sixth letter.

Going deeper

At sea level, water freezes at what temperature in Fahrenheit?

Answer32°F

Water freezes at 32°F, which is 0°C.

How many flats are in the key signature of F major?

AnswerOne

F major has one flat: B-flat.

In photography, what does an f-number describe?

AnswerThe lens aperture

The f-number is the ratio of focal length to aperture diameter.

Expert level

What is fluorine's atomic number?

Answer9

Fluorine has 9 protons; chlorine is 17.

The letter F descends from which Phoenician letter?

AnswerWaw

F came from Phoenician waw through the Greek digamma.

Know these cold?Today's round is five questions like these, 20 seconds each. Your streak and level follow you to every arena.Play today's round