Talking Physics

I took the video below using a Coke Zero bottle, shaking it and opening the lid to produce lots of bubbles. Then, I used the Vernier Video Physics app from my iPad to track the level of the bubbles as they popped. I had to adjust the points and make them a little lower than where they were, because the level of coke was also rising, but if you pause on the y-t graph you get a pretty nice exponential curve.

Thanks to Colin Piper from the SPN (IOP) who gave me the idea by mentioning the decay of foam in beer in his workshop at Chartherhouse School today.

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