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Product 12260

Buzzer in A Vacuum Demonstration Kit
Buzzer in A Vacuum Demonstration Kit
The buzzer in a vacuum demonstration kit allows you to show the concept of whether sound waves travel in a vacuum. The buzzer operates on a DC power source. The kit requires ¼" tubing and a vacuum pump, which are available separately.

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Without air or matter, sound waves cannot travel and therefore cannot be heard. This bell jar effectively demonstrates this concept using a battery–operated buzzer housed inside an acrylic tube. When the buzzer is placed beneath the jar and a vacuum seal is created in the chamber, students will observe a total absence of sound. Once air is returned to the chamber, the sound of the buzzer can be heard once more. Activity requires a vacuum pump, not included. Height 14 cm dia. 10 cm.