A schematic diagram of the bubble deflation experiment. A syringe is used to inflate the bubble, and a precision manometer is used to measure the pressure difference between the interior and exterior of the bubble.
Typical experimental data for determining the surface tension of a soap film. As shown in Eq. (1), the surface tension is given by the slope of the best fit line.
Raw data for a deflating soap bubble. A slow decrease in the bubble’s radius is followed by a rapid increase.
A partial sphere results when a plane cuts through a sphere of radius leaving a flat circular face of (fixed) radius . The volume of such a partial sphere is found by integrating slices of thickness along the -axis.
The partial sphere model of Eq. (11) and an appropriately dimensionless version of the full sphere model of Eq. (7) are compared to the experimental data.
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