Asap when salt is dissolved in water, the result is a a. gas b. compound c. homogeneous mixture d. heterogeneous mixture

It’s actually C. homogeneous compound because when they combine you can’t separate them

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.