eli5 why does it make a loud bang when you pop a plastic bag or bubble wrap?

Question

eli5 why does it make a loud bang when you pop a plastic bag or bubble wrap?

In: 2

Answer 1

sound is just air moving back and forth rapidly. When you move air enough it creates sound create sound. Imagine wind blowing lightly into your ear. Even though its moving in one direction it causes the air molecules to vibrate also.

So when you pop a plastic bag, it causes the air to be compressed. When it suddenly decompresses, it causes the air to move back and forth rapidly. Which creates the sound.