What is the definition of a mechanical wave? requires a medium

a wave that can move through outer space

a short, high frequency wave

a wave created by machines

A mechanical wave is a wave that is an oscillation of matter, and therefore transfers energy through a medium. While waves can move over long distances, the movement of the medium of transmission—the material—is limited. Therefore, the oscillating material does not move far from its initial equilibrium position.

the answer is 100. i just did this lesson and got a 100% on it. : )

-fishtank