- #1
franz32
- 133
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Most children, play with toy telephones by connecting two plastic cups with a long string. When the string is pulled tightly, sound is transmitted from one cup to the other. How does that thing work? (I 'm used to play with it but I ignored that fact).
Another one... doctors use stethoscope to a patient to know his physical health... how does that thing work? I think most waves need a medium to travel... so thru what medium is the sound transmitted? =)
Another one... doctors use stethoscope to a patient to know his physical health... how does that thing work? I think most waves need a medium to travel... so thru what medium is the sound transmitted? =)