Comments by "Peter \x26 Pete" (@PeterPete) on "3 Perplexing Physics Problems" video.

  1. After watching the first part of the video, the video ought be renamed 2 perplexing physics problems because the first one isn't a problem at all. Why the pressure inside the pop bottle remains the same when the bottle is still or shaken with cap closed is simply because the acid/alkali ingredients cannot produce anymore CO2 as an equilibrium state exists inside the bottle. Shaking the bottle frees up the acid/alkali ingredients from the stabilizers so they are able to mix better producing froth within the headspace. However opening the cap and releasing pressure causes disequilibrium within the bottle allowing the mixed acid/alkali to instantaneously produce the extra CO2 needed to force the drink out of the bottle - next problem haha! Oh and why paper straws cause fizz when they are inserted into a pop drink is simply because of the chemicals within the paper react with the acid/alkali ingredients of the drink! CO2 is always produced from an acid/alkali reaction!
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