Bell Jar with Battery Operated Buzzer
# de catalogue 470128-398
Fournisseur: VWR International
Spécifications
- Description:Bell Jar with Battery Operated Buzzer
- Cat. no.:470128-398
- Dimensions:10ø×14cm
- Supplier No.:BTUZN11
Spécifications
A propos de cet article
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.
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