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Demonstration Devices > BELL JAR WITH BELL AND PRESSURE PLATE

Sound waves will not travel through a vacuum. Prove it with this demonstration of a ringing bell inside a sealed glass jar. As air is gradually vacuumed out of the jar, the bell becomes faints into silence.

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Please log in for prices and orders. Product # Product Qty Price 6080-01 PRODUCT SAFETY ALERT (click for larger warnings page) WARNING: ADULT SUPERVISION: To be used under Adult Supervision only. BELL JAR WITH BELL AND PRESSURE PLATE