| DCS # | DEMONSTRATION | REFERENCE | ABSTRACT |
|---|
| 3B20.00 | Longitudinal Pulses and Waves | | |
| 3B20.05 | the wave - longitudinal | PIRA 1000 | |
| 3B20.05 | the wave - longitudinal | 3B20.05 | Not the standard stadium wave. The students bump into each other to propagate the wave. |
| 3B20.10 | hanging slinky | PIRA 200 | A long slinky is supported on bifilar suspension every four inches. |
| 3B20.10 | hanging slinky | 3B20.10 | A long slinky is supported on bifilar suspension every four inches. |
| 3B20.10 | hanging slinky | Sa-12 | Compression pulses are sent along a hanging slinky. |
| 3B20.10 | hanging slinky | 18-3.4 | Time a longitudinal pulse and compare to calculated. ALSO normal mode. |
| 3B20.10 | hanging slinky | S-39 | A long helical spring suspended every few turns with a bifilar suspension. Directions for making the spring. |
| 3B20.10 | longitudinal slinky waves | Disc 09-15 | Show longitudinal waves on a bifilar suspended slinky with paper flags every fifth coil. |
| 3B20.11 | stretched slinky | S-2a.2 | Students stretch a slinky and send longitudinal waves down from one end. |
| 3B20.12 | wave cutoff with a hanging slinky | AJP 57(10),949 | Waves do not propagate below a critical frequency if the slinky is supported by short strings. |
| 3B20.13 | storing slinky | TPT 3(7),320 | Store a slinky around a #6 dry cell. |
| 3B20.20 | longitudinal wave on air track | PIRA 1000 | |
| 3B20.20 | longitudinal wave on the air track | Sa-13 | A pulse is sent down a set of gliders coupled with springs on the air track. |
| 3B20.21 | traveling & standing waves/air track | AJP 33(4),269 | Complete discussion of traveling and standing waves on an air track with the critical point being the special mass and damping necessary for the last glider in the traveling case. |
| 3B20.25 | air tube magnetic waves | AJP 50(6),569 | An air tube support magnetically coupled beads for demonstrating longitudinal waves. Replacing half the beads with larger mass demonstrates a different medium. |
| 3B20.30 | longitudinal wave model (PASCO) | PIRA 1000 | |
| 3B20.30 | springy snow fence | 3B20.30 | The Pasco longitudinal wave machine has vertical rods pivoted at the center and coupled with springs. |
| 3B20.30 | longitudinal wave model | Disc 09-14 | The Pasco device. |
| 3B20.35 | longitudinal wave machine | PIRA 1000 | |
| 3B20.35 | longitudinal wave machine | 3B20.35 | |
| 3B20.40 | ball and spring waves | S-40 | A series of croquet balls are hung from bifilar suspensions and connected with coil springs. Balls of different mass can be used. |
| 3B20.45 | hanging magnets | S-2d | About twenty magnets on bifilar suspension are used to show longitudinal waves. |
| 3B20.50 | hear the reflection | S-41 | Stretch a stiff helical spring across the room to a sounding board and listen as a longitudinal pulse strikes. |
| 3B20.60 | speed of particles vs. waves | PIRA 1000 | |
| 3B20.60 | speed of particles vs. waves | 3B20.60 | Same as Sa-11. |
| 3B20.60 | speed of particles, waves | Sa-11 | A line of sticks with small gaps is pushed from one end. |
| 3B20.70 | Crova's disc | PIRA 1000 | |
| 3B20.70 | Crova's disc | Sa-15 | Non-concentric circles ruled into a plexiglass disc appear to be compressions when projected through a slit. |
| 3B20.70 | Crova's Disc | S-7c.2 | A projection Crova's disc. |