The reason a wine bottle inside the heel of a shoe that is struck against an object, is able to dislodge a cork, is because of cavitation. The force of the hit causes the bottle to stop suddenly, but because the wine is fluid and keeps moving it causes tiny vapor pockets to emerge. These tiny vapor pockets of low pressure are called cavitation bubbles and they form in the neck of the bottle. The bubbles soon collapse and the wine surges forward helping push out the cork...
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