WAVES AND OSCILLATIONS - WAVE MOTION - WAVE PROPERTIES OF SOUND	NC State University Faculty Access
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Description: Switch on the vacuum pump. Connect the battery to the bell. It takes 2 minutes to pump down to a good vacuum. Purchased/Built: purchased Setup Time: 5 min Quant. in Demo Room: 1 Demo References Hilton S-3a Air is pumped from a bell jar as a battery powered bell rings inside. The Video Encyclopedia of Physics Demonstrations Disc 10-09 Place an electronic siren with a LED in series in a bell jar. Sutton S-52 Ring a bell in an evacuated bell jar. Other methods and hints. Sutton S-53 You can hear a bell in a closed jar while air is present. Freier and Anderson Sh-2 A doorbell is placed in a bell jar which is then evacuated.
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