Within the same medium, all electromagnetic waves travel at the same speed.
Gases
Mechanical waves need a medium to travel in
It moves it's slowest in the solid state
Yes
Sound waves don't just travel the slowest in a vacuum, they don't travel at all. The reason is that sound waves, like all mechanical waves, need a medium to travel through.
Within the same medium, all electromagnetic waves travel at the same speed.
surface waves because they are the last waves and also the slowest.
Gases
Mechanical waves need a medium to travel in
Waves need not require medium to travel through. Only Mechanical waves like sound waves require medium to travel through. Electromagnetic waves travel in vaccum like light waves. Some waves transmitted in a medium due to disturbances in the medium .
It moves it's slowest in the solid state
Yes
The molecule of the medium vibrates at the dirction in which the wave travels
They can both travel through a medium.
Earthquake waves travel fastest in the interior of the Earth, as speed of waves increases as we go inside the Earth. The speed of a wave depends on the properties of the medium it travels in. The wave propagates faster in the denser and heavier core.
Mechanical waves are waves that require a medium in which to travel, i.e., a solid or fluid. As sound needs a medium to travel, sound is a mechanical wave.