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Regarding torus and water

  1. May 15, 2013 #1
    Hi,

    If i use a spoon with a hole in it in a cup of water, bubbles emerge. Does that mean that air got in?

    Regards,

    Justin
     
  2. jcsd
  3. May 15, 2013 #2

    CWatters

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    Water can contain disolved oxygen so could just be that. You haven't really given us much info.
     
  4. May 15, 2013 #3
    Isnt that impossible? Simply mixing something in water does not bring chemical reactions into place. Also not putting oxygen together. Or do you mean water with bubbles?

    I mean normal water at the kitchen sink.
     
  5. May 15, 2013 #4

    CWatters

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    Agitation (eg stirring) is a good way to release disolved gasses. Try shaking a can of soda before opening it.
     
  6. May 16, 2013 #5
    Ok, if there is reaction to agitation, this is chemical. I try to see how 'big' bubbles come into existence by say stirring with a kind of stick.
     
  7. May 16, 2013 #6

    CWatters

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    Cavitation?

    Edit: Perhaps I'd better explain... When an object is dragged through water you can get a pressure reduction behind the object. This can cause air to be dragged down into the water.

    If not that then I suggest you post a video.
     
    Last edited: May 16, 2013
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