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I was doing this in the mid eighties... think a teacher showed me it but can't remember... didn't have tv.
I'm pretty sure I saw it featured in an article in Highlights for Children during the 80s. https://en.wikipedia.org/wiki/Highlights_for_Children
I feel like this is more than just air flow. You're adding energy into the bottle by causing the water to spin in a whirlpool. It seems like that energy would also help push the water out of the bottle through path of least resistance dynamics (the open end of the bottle).
The counter-argument there is that after you've swirled it, each water particle has to travel a longer path to get out of the neck, because it's corkscrewing rather than going in a straight line.
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I'm pretty sure I saw it featured in an article in Highlights for Children during the 80s. https://en.wikipedia.org/wiki/Highlights_for_Children
I learned it in australia many years ago from these guys: https://www.youtube.com/watch?v=DYBw7k_8EbE
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I learned it in australia many years ago from these guys: https://www.youtube.com/watch?v=DYBw7k_8EbE
Do Australians commonly say "elephant" to count seconds as the presenters do? In the U.S. it's usually "one-thousand" or "Mississippi". (I guess I can imagine that Australians wouldn't say "Mississippi"!)
There is a much faster way, using cavitation.. from Bill Beaty of the awesome http://amasci.com/ https://www.youtube.com/watch?v=77gWkl0ZUC8
"That's 'cause they are shards of broken glass."
"...on second thought, I'm not really that thirsty."
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I learned it in australia many years ago from these guys: https://www.youtube.com/watch?v=DYBw7k_8EbE
Do Australians commonly say "elephant" to count seconds as the presenters do? In the U.S. it's usually "one-thousand" or "Mississippi". (I guess I can imagine that Australians wouldn't say "Mississippi"!)
Earlier quoted context omitted.
The counter-argument there is that after you've swirled it, each water particle has to travel a longer path to get out of the neck, because it's corkscrewing rather than going in a straight line.
Except for the fact that those particles are moving faster (velocity)...