Blow over the top of two empty bottles and see whether the tones produced are of the
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Blow over the top of two empty bottles and see whether the tones produced are of the same pitch. Then put one in a freezer and try the procedure again. Sound travels more slowly in the denser air of the cold bottle, so the note is lower.
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Related Book For 
Conceptual Physical Science
ISBN: 978-0134060491
6th edition
Authors: Paul G. Hewitt, John A. Suchocki, Leslie A. Hewitt
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