What’s the four things that can happen to sound waves when they reach a barrier?

Type the letter that represents the correct location for each particle type below.

Why is permeable soil best for plants that need a lot of drainage?

Aradio signal from a gps satellite take only about 0.067 seconds to reach a gps reciever. if the speed of light is about 300,000km/s, then approximately how far away is the reciever from from the satellite?