What is Motion? O A combination of forces on an object that produce a net force of zero
O A combination of forces on an object that produce a net force that is zero
O Change in an object's location over time
O Contact force that acts between two objects or surfaces that touch each other Need help Asap

Dshould be the right answer i think

Sounds propagates through some kind of medium. usually it's air, but it goes just as well through solid objects like walls, windows etc. a soundwave will compress the (air)molecules in front of it, and if this increased density wave hits your ears, you register it as sound. solid objects like walls are a lot denser than air, this means that they will damp a wave, but also carry it easier.

The correct answer is antinodes