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Bell Jar and Ringer
The bell jar (named for its shape) and vacuum plate are supplied with a battery-operated electric bell. The bell is mounted on springs to dampen the vibrations, so students can clearly hear the drastic reduction in sound when the air is removed.
Hearing is believing: Can sound travel in a vacuum?
Showing that sound requires a medium to travel through requires specific equipment, and it's the only way to really demonstrate the concept.
The bell is mounted on springs to dampen the vibrations, so students can clearly hear the drastic reduction in sound when the air is removed. 8.5" diameter, 11.5" tall, and requires 2 AA batteries. Electric vacuum pump not included, see recommended products.
Products being sold are not toys. They are for Educational / Labratory use only. They are not for use by children 12 and under.
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What’s Included
This bell jar (named for its shape) and vacuum plate is supplied with:
- A battery-operated electric bell
- Connector hose
