If you blow across the top of a half full bottle of soda you can produce a clear tone. If you take a drink of soda to reduce the amount of liquid in the bottle and try this again the pitch (frequency) of the sound produced will
A) increase.
B) stay the same.
C) exactly double.
D) decrease.

Question

Quizplus · Accepted Answer

The pitch of the sound produced by blowing across the top of a bottle is determined by the length of the air column inside the bottle. When you drink some soda, the air column becomes longer, which lowers the frequency and decreases the pitch of the sound.

If You Blow Across the Top of a Half Full