Why does the pitch lower when tapping a cup after adding a hot liquid?

Subject: Why does the pitch lower when tapping a cup after adding a hot liquid?

Date: Fri Jun 23 15:31:10 2006
Posted by David
Grade level: nonaligned School: No school entered.
City: Berowra Hts State/Province: NSW Country: Australia
Area of science: Physics
ID: 1151101870.Ph

Message:


This is the reverse observation to the several posted about pitch change. I 
have searched the archives and reach many posting about the pitch rising. I 
still think it might have to do with the cup expanding. I talking about a 
ceramic coffee mug. Any hot liquid seems to have the same effect. Many Thanks.

Re: Why does the pitch lower when tapping a cup after adding a hot liquid?

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