Description

packaged in a wooden storage box

Metal spouting cylinder with multiple outlet holes at different heights

demonstrating mechanical-to-electrical energy conversion as the crank lights the bulb

sized for acceleration

Acrylic bell-in-vacuum jar with an internal 4-6V DC electric bell that fades and falls silent as the enclosed air is removed

Bell in Vacuum Jar, Acrylic, 4-6V DC Pack Size_100 packaged in a wooden storageAcrylic bell in vacuum jar with an internal 4 6V DC electric bell that fades and falls silent as the enclosed air is removed, visualizing sound transmission dependence on a medium.

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Bell in Vacuum Jar, Acrylic, 4-6V DC Pack Size_100 packaged in a wooden storage

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