Yes it's true, but that doesn't last very long. It creates a compression of the molecules during exactly half of each vibe, and during the other half, it leans the other way, and the molecules spread out in what's called a "rarefaction" a region of lower-than-normal pressure. This 'train' of compressions and rarefactions is what travels through the air, away from the vibrating object, and it's what some people often call a "sound wave".
String quartet I think I’m not fully sure
Answer:
The notes on the bass clef is a line or space lower than the treble clef. The pitches are also lower. But if you use ledger lines, you can create the same pitch on the Bass clef as the treble clef.
Explanation:
I am a musician so i am 99.9% sure this is right
