yes they certainly do
The character frequency would never change
Because they are waves, and waves travel that way.
Because they are changing mediums.
no. they slow down.
sound waves bounce off of walls. they need air to travel.
Probably Earth Quakes
No, electromagnetic waves do not need matter to travel. However, they can interact with matter and change accordingly.
The character frequency would never change
The waves are refracted towards the normal (ie towards the line perpendicular to the surface).
Because they are waves, and waves travel that way.
Waves.
by their boundaries
The speed of the waves depends on the density of the material.
no p waves travel faster than s waves
They are called sound waves. Their name does not change just because they travel in water.
Because they are changing mediums.
no. they slow down.