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Eisco Labs Bell in Vacuum Jar - Acrylic 4-6V DC

Eisco Labs Bell in Vacuum Jar - Acrylic 4-6V DC

EISCO Bell in Vacuum Jar - Acrylic 4-6V DC (1) Bell Jar (1) Electric Bell (1) Rubber cork with terminals Demonstrate that sound requires air to travel through with the Bell in Vacuum Jar set. Slowly decrease the air inside and hear the sound...

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