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Bell Jar with Battery Operated Buzzer

This bell jar demonstrates that sound waves can't travel and therefore can't be heard without air or matter.

  • Battery-Operated Buzzer
  • Vacuum Seal Creates Absence of Sound
  • Bell Jar Shows Can't Be Heard without Air or Matter
  • Height: 14 cm
It features 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 observe a total absence of sound. Once air is returned to the chamber, the sound of the bell can be heard once more.

This activity requires a vacuum pump, not included. It measures 10 dia. x 14 cm



Item # Description Unit Availability Price Quantity
470128-398 Bell Jar with Battery Operated Buzzer
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