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Describe an environment in which the sound of a ringing cell phone could not be transmitted, and explain why the ringing wouldn't be heard. Justify your reasoning using complete sentences.

Respuesta :

AL2006
The sound of a ringing cellphone could not be transmitted or heard
if the cellphone is enclosed in some sort of closed container from which
the air has been removed. 

Sound is a mechanical wave, and so it must have some material substance
to travel through.  Otherwise sound cannot travel from one place to another. 

The sound of the ringing could not travel through the vacuum inside
the container if all the air were removed.

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