Bell in Vacuum Jar, Acrylic, 4-6V DC Pack Size_100 Plug-in 120V AC blower sized

Plug-in 120V AC blower sized to feed a linear air track

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

varying length isolating density as the single variable across materials

Sliding-rail aluminum bench with 1

this concave glass mirror at 100mm focal length runs at f/1 for vivid real-image demos and converging-reflection work

Bell in Vacuum Jar, Acrylic, 4-6V DC Pack Size_100 Plug-in 120V AC blower sizedAcrylic 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.