US$ 140.00
sized for acceleration
Metal spouting cylinder with multiple outlet holes at different heights
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 sized for accelerationAcrylic 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.
US$ 140.00
US$ 100.00
US$ 22.00
US$ 22.00
US$ 29.99
US$ 129.98