Do you agree with me, or Mehdi (ElectroBoom)?

Me and Medie released two videos at the same time giving different explanations for the chain fountain. The person with the correct explanation gets 10,000 Canadian cents from the other person. Some commenters said that not only was his explanation correct, but his approach was better. He came up with hypotheses and tested those hypotheses, whereas I was just interested in trying to break a world record, and frankly that is a fair criticism. So, I am back with some hypotheses and some tests for those hypotheses and some simulations. The crux of our disagreement is the fact that I think for the chain to rise up in a fountain, there must be an extra kickback force from the pot on the chain as it's lifted from the pot, but Medie doesn't think that extra force is required. To prove his point, Medie put together this ingenious test. The beads on this chain are really spaced out, which removes any kickback force. And yet, look, here's the mold effect. But actually, what you see here is quite different to what you see with the normal bead chain. With normal chain, it starts off as a dribble and grows into a chain fountain on its own. Whereas, in Medie's test, he imparts the shape of a chain fountain to the chain at the beginning by hand, and that fountain then slowly decreases in height under the influence of gravity. So, my argument is that this isn't a demonstration of the chain fountain. What it does demonstrate is that a chain will flow through the shape that you give it, and that shape would be maintained in the absence of gravity. In the presence of gravity, the shape that you give the chain collapses over time. Look, here's another demonstration on a horizontal surface. So, there's no issue with gravity here. As I pull the chain around, it moves through the shape that I give it. Actually, the shape does collapse a little bit, presumably because of friction in this case as opposed to gravity. For an intuitive explanation of this behavior, you can think about it in terms of waves. Like, if I whip this chain, the wave travels down the chain. But, if the chain were to be traveling in this direction at exactly the same speed as the wave was traveling in this direction, then the wave would appear to be fixed in space with the chain moving through it. So, when Medie whips the chain in this experiment, the wave he creates travels in this direction, and the chain travels in this direction. The end result is that that wave is fixed in space.

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