Sucking an egg into a bottle

I’m currently teaching P3 and we are starting off with some kinetic theory. We thought that we’d start off with a couple of fun demonstrations. I managed to film one of my favourite ones – how to get an egg into a conical flask. Experiment to how atmospheric pressure will push an egg into a bottle… and then how heating the air increases the pressure and pushes the egg back out.

This little demo leads nicely into Boyle’s law.

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