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05:06
@Hema the bottom of the tube must be at a node in the sound wave. That is, the amplitude of the wave must be zero there because the wave can't move when there's a solid surface in the way.
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1 hour later…
06:18
@SmokeDetector k test
@SmokeDetector test2
@SmokeDetector test3
@SmokeDetector n test4
@angussidney That message is not a report.
@SmokeDetector test5
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7 hours later…
13:04
6 messages moved from stack

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