Then, as you browse the listings, simply check the boxes corresponding to the demos you would like.
Tubing filled with shot shows the reflection of a transverse pulse from a fixed end.
A Slinky is used to show longitudinal waves. Shows standing waves in a spring with one end fixed and the other free. Shows standing waves in a spring with both ends free. A mechanical analog for transverse waves. An aluminium rod is held at nodal points and rubbed with rosined chamios to produce different pitches.