Why are sound waves known as mechanical waves?
Sound is produced by the vibration of objects. When objects vibrate, it collides with the molecules in the medium. This collision produces mechanical oscillations in the medium. Because of this, sound waves are known as mechanical waves.
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Sound waves are called mechanical waves because they need a medium to travel through.
Electromagnetic waves can travel through space(without medium), whereas sound waves cannot.
Sound waves always do need a medium, the medium can be different like air, water, metal(solid), but the presence of medium is a must for sound waves thats why they are called mechanical waves.
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