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Bell in a Vacuum W-b3a
An alarm buzzer is suspended inside an evaculated bell jar, turned on, and the bell jar is evaculated. When air is let back into the jar, the sound returns. Fishbane Chapter:   14.6 HRW 9th:   17.03 Reese Chapter:   12.913 RHK 5th:   19.3 SJ 3rd Chapter:   13.1 PIRA DCS classification:   3B30.30

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Physics Lecture Demonstrations at the Department of Physics and Astronomy
The Johns Hopkins University