Editing Flame Tube (section)

== Demonstration ==

;Preparation: 
Set the Flame Tube on the first table, with both sets of feet resting on the same table. On the second table, set the speaker next to the Flame Tube, putting the speaker about half an inch away from the cellophane seal on the side of the tube, or as close as it can get without touching. Next to the speaker, place the amplifier and tone generator. Connect the tone generator cable to the amplifier using the back port labeled "Phono", and the audio cable in the "Aux" port. Put the switch for the ports in the "Phono" position. Make sure the main volume for the speaker is at zero, then plug in the amplifier and tone generator and turn them both on. Connect the propane tank to the flame tube, and before the start of the presentation open the propane tank fully. Attempt to ignite the holes on top of the propane tank once every minute, and once lit let it stand so the flames can grow.

;Presentation:
# Explain briefly the setup you are using; A speaker system is set against the Flame Tube, and by turning on the speaker you will put a sound wave through the tube, which we will see as a Transverse wave in the fire. This is because of the sound compressing the propane gas inside the tube.
# Set the tone generator to 210Hz, and turn up the speaker volume to 1/2 full. The flames will move, creating the wave!
# Turn down the speaker volume, and name the parts of the wave: Peak (high point), Trough (low point), Node (mid point), Amplitude (height), Frequency (note heard), and Wavelength.
# Ask the audience what will happen if we turn up the volume. Show that the amplitude increases, and therefore the amplitude is how ''loud'' a sound is.
# Ask the audience to vote on this: If you doubled the frequency (or "went up an octave"), should we see ''more'' waves or ''less'' waves? After getting responses, set the tone generator to 420Hz and turn the volume up 1/2 full. The number of waves will double! What kind of relationship do frequency and wavelength have?
# Flip the switch on the back of the amplifier to "Aux". Connect your phone or music player, and select a song to play for them! Songs that work well are:
#* Secrets (OneRepublic)
#* Let it Go (from Frozen)
#* Photograph (Ed Sheeran)
#* Fly Me to the Moon (Frank Sinatra)
#* Iron Man (Black Sabbath)
#* Stay the Night (Zedd, Haley Williams)
#* Bangarang (Skrillex)
#*''NOTE: Use the two lighters to keep re-igniting the propane while you have a song playing. The music will put out flames as it plays. Only play 30-45 seconds of any one song, so that you can play a few different songs.''
# When you finish presenting the Flame Tube, turn off the propane tank and detach it. Place the speaker on its side, and prop the flame tube on it, with a set of feet resting on the speaker. Ignite the propane coming out of the lower end of the tube, and let it burn off until it is time to pack up.