electromagnetic waves, Do not require a medium and can travel through a vacuum, mechanical waves, Require a medium (solid, liquid, or gas) to travel, longitudinal waves, The particles of the medium move parallel to the direction of wave propagation, Audible sound, 20 Hz to 20,000 Hz (what humans can hear)

Clasament

Stilul vizual

Opţiuni

Comutare șablon

Restaurare activitate salvată automat: ?