Ok, so the grandkids are messing about with bubbles. When two bubbles of equal size conjoin, the "membrane" between them appears to be a flat circle. How general is this, we asked? So what if the conjoined bubbles are of unequal size. Our experiments seemed to suggest that the answer was, "No!", and that the smaller bubble bulged into the larger one. Why would that be? Am I correct that a bubble will expand (if it can do so without breaking) until the pressure inside equals the pressure outside? So, the pressure in the two bubbles should be the same? So why would they bulge in either direction?
How did the sale go, Roger? I couldn't get there to block the door. Nick Nicholas S. Thompson Emeritus Professor of Psychology and Biology Clark University http://home.earthlink.net/~nickthompson/naturaldesigns/
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