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H1-01 BELL IN VACUUM 10 years 3 months ago #108

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ID Code: H1-01
Purpose: Demonstrates sound wave requirement for a medium
Description: Start the bell, then pump the air out of the jar. Air pressure in the jar is read by the large gauge. As the air is removed, the sound intensity decreases, ultimately to nearly zero. Turn off the vacuum pump when the jar is evacuated and crack the valve open, allowing air to re-enter the jar. As the pressure increases the sound of the bell comes back, but without the noise of the pump.
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Last edit: by zzfixk21.
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