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Rubens tube physics project

  1. Mar 10, 2009 #1
    For a Physics project my group and I are trying to build a Rubens tube. It is a device that shows the standing waves inside a closed-closed tube using fire. We are putting a small speaker inside a pvc pipe that is perforated on the top with holes. We will then fill the tube with propane and then light each hole so that you can see a flame. We then will turn on the speaker and if the standing wave formula is satisfied the flame heights will change and the flames form an image of the standing waves. My question is for the standing wave equation

    f = mv/2L

    can we assume that the speed of sound is 343 m/s or because of the higher temperature inside the tube and because of a different gas (propane) will we need to calculate the speed of sound ourselves?

    Any help will be greatly appreciated.

  2. jcsd
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