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THe question in air pressure lesson .

  1. May 14, 2007 #1
    THe question in "air pressure lesson".

    When I was studying about the air pressure, my teacher showed some examples about them, that is, the water in an upside down glass with covered by a card always do not fall in gravity. Then the question followed. I asked my teacher "Why do the water fall in gravity when the card is taked off? ", but my teacher couldn't answer. I hope that some people in this forums can help me. Thank you.
     
  2. jcsd
  3. May 14, 2007 #2

    russ_watters

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    Staff: Mentor

    Water, being a fluid, has no solid surface to resist deformation.
     
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