why sound needs a medium to travel
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Sound needs a material medium for their propagation like solid, liquid or gas to travel because the molecules of solid, liquid and gases carry sound waves from one point to another. Sound cannot progress through the vacuum because the vacuum has no molecules which can vibrate and carry the sound waves
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Sound is propagated by the vibration of molecules in the medium
The medium can be solid, liquid or gas
In vacuum, there is no molecules to vibrate and propagate the sound
Hence, sound needs a medium to travel
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