C4 practical: Speed of sound (drinking straw) support
Apart from the need for a computer with microphone the apparatus is very simple requiring only a drinking straw and a pair of scissors. Drinking straws with out those bendy bits are best but I couldn"t find any in my local shop so had to do with a slightly bent variety. You can also use a sound sensor plus interface instead of the computer microphone plus Audacity, but it seems a bit pointless especially since the computer...
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