You are holding a drinking straw in your hand so that both its ends are open to the air. When you blow air across one of those ends, the air in that straw vibrates and the straw emits a tone-its fundamental pitch. If you replace the air in the straw with carbon dioxide, which is more dense than air, the sound that the straw emits will
A) have the same pitch but will decrease in volume.
B) decrease in pitch (shift to a lower frequency).
C) increase in pitch (shift to a high frequency).
D) have the same pitch but will increase in volume.

Question

Quizplus · Accepted Answer

The speed of sound is slower in denser gases like carbon dioxide compared to air. When the air in the straw is replaced with carbon dioxide, the speed of sound decreases, leading to a decrease in the frequency of the sound waves produced, which results in a lower pitch.

You Are Holding a Drinking Straw in Your Hand So