() describe the difference between mechanical and electromagnetic waves. give an example of each kind of wave related to telecommunications. answer using complete sentences and key vocabulary

One difference between mechanical and electromagnetic waves is that mechanical waves need a medium to pass through (solid, liquid, gas). EM waves can travel through matter or though a vacuum. In regards to telecommunications, EM waves can be radio waves, these are used in TV's, phones, computers, radios. Mechanical waves somewhat relate to this since radios produce sound;so an EM wave would turn into a mechanical vibration inside a speaker then sound would be produced.  

Ithink that its like 15 mph.