| 8.9.1: Find the frequency of the wave shown in the above animation. | 8.9.2: The above simulation shows disturbances on two identical strings. |
| 8.9.ap 1: The above simulations show disturbances on two identical strings. | 8.9.ap 2:The simulation shows how two waves can add together to produce a standing wave on a string. The waves in the first two panels have been superimposed to produce the wave in the third panel. |
| 8.9.ap 3: The above simulation shows disturbances on two identical strings. | 8.9.ap 4:The above simulation shows disturbances on two identical strings. |