tomgwyther Posted January 24, 2007 Share Posted January 24, 2007 Here's an odd phenomenon I can't quite figure out... A microwaveable sausage comes wrapped in an air-tight bag (Similar to a bag of crisps/potato chips) When I heat it in the microwave, the bag contracts around the food, as if a vacuum were being created. The hot sausage comes out shrink-wrapped! How is this possible, since the hot meat should make the available air in the bag expand like a balloon. Microwaves only realy have a noticeable affect on sugar, water and fat molecules, not air, and in any case, the bag should expand as it heats. How can hot air contract? Is the meat absorbing the available air? Could the humble sausage be breaking the laws of physics? Will t.v dinners help us toward a unified theory of everything? Why am I so concerned about my lunch in this way? So many questions: Any answers? p.s the same happens with hot lasagne in a bowl, wrapped in cling-film. Link to comment Share on other sites More sharing options...
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