Physics SL II                Purvansh Trivedi

Period C                25/10/10


Calculating Values and Placing in Tables

For the Beer Foam Experiment, the main objective was to calculate the exponential decay of the foam in the beer when initially poured. Since it is impossible to count how many bubbles there are in the foam, we must use a formula to derive the exponential decay using the level of the beer until all the foam has evaporated.

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Table of the amount of foam at different times during different trials

Now, we must calculate the average amount of foam, the uncertainty in the amount of foam and the natural log of the average amount of foam.

To calculate the average of the trials at each point, it is possible to use this formula:

Then, it is possible to calculate the uncertainty of each amount of foam using this formula:

Finally, it is possible to calculate the natural log of the average amount of foam using the formula:

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