sound fx http://bbcsfx.acropolis.org.uk/
1. Measurement of the speed of sound in air.
2. Investigation of the variation of fundamental frequency of a stretched string with length.
3. Investigation of the variation of fundamental frequency of a stretched string with tension.
One of the main things we learned in the Junior Cert was that light travelled in straight lines. So to does sound, we are not told this in Junior cert. One of the reasons is because you can hear people around corners, we will talk further about this in the waves topic but for now anything moving will move at a constant speed in a straight line.