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       #Post#: 2698--------------------------------------------------
       Simple tricky question
   DIR By: Michel
       Date: September 17, 2013, 6:24 am
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       Explain why the lid of a fitting cooking pot sticks to the pot
       after the pot cools down after cooking?
       #Post#: 2711--------------------------------------------------
       Re: Simple tricky question
   DIR By: Potla
       Date: November 21, 2013, 1:08 am
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       [spoiler]
       When the lid is put on while the pot is hot (!), the air inside
       is at a higher temperature. As it cools down, the air contracts,
       and the water vapours also condense, so the pressure inside
       decreases. It drops beyond the atmospheric pressure, so the lid
       sticks to the pot.
       [/spoiler]
       :D
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