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Why don’t we fill bike tyres with helium? (cyclist.co.uk)
2 points by wlkr on Sept 22, 2018 | hide | past | favorite | 1 comment



go flat in minutes. Helium is the smallest solitary gaseous element, as does not form molecular aggregates, like most other gasses. Hydrogen exists as H2 = a far larger molecule. That is why helium novelty balloons go flat in a day or so even when they use metal lined mylar to keep the helium in.




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