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Turning over of icebergs

  1. Oct 20, 2011 #1
    We can easily calculate that 89.5% of an iceberg is submerged. Yet occasionally icebergs turn over with possibly disastrous results to nearby shipping. How can this happen consudering so much of their mass is below sea level?
     
  2. jcsd
  3. Oct 20, 2011 #2

    xts

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    See it yourself:

    Take a glass of water (or - better- your favourite drink...), and put into it a single, possibly strange-shaped chunk of ice.

    Drink it only after your micro-iceberg turns!

    The ice-chunk (ice-berg) melts at different speed in various places - usually it melts faster in its underwater part. So the centre of its buoyance moves differently than centre of its mass - from time to time changing stable equilibrium into unstable one.
     
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