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Originally Posted by Pip
No, I'm guessing the diffused carbon monoxide in the unopened one lowered the freezing temperature just enough so that it wouldn't freeze, like C4 said. If the water was carbonated, that is... keyshawn?
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Not to nitpick, but wouldn't the freezing temperature have to be raised for this effect to occur?
Secondly, as a follow up on supersix2 (hate to keep treading on your toes
), but if the time derivative of the temperature roughly scales as the spatial laplacian of temperature, then, then scaling analysis roughly indicates that a difference of one quarter of the volume (with constant radius, this implies one quarter of the height) could be expected to render a difference in temperature change on the order of sixteen times faster, give or take. I would argue that the difference in volume would matter less at longer time scales, not shorter ones. Basically, ten days later they would both be frozen; on shorter time scales, the smaller volume freezes first, which is confirmed by the observation which we are discussing.