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Rubber band in air vs water?

  1. Feb 28, 2010 #1
    Hmm...some experimenting led to an interesting result. I attached a weight to a rubber band and suspended the rubber band in some hot water. The rubber band expanded. I repeated the experiment in cold water and the band shrank. An expected result, yes? Well I redid the experiment in air and I got something totally different. I used a hairdryer and heated the band with the weight on it and the band shrunk...anybody care to explain why?
  2. jcsd
  3. Mar 1, 2010 #2


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    Do you have an estimate (be close) of the temperatures involved?
  4. Mar 1, 2010 #3


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    Staff: Mentor

    Maybe google to see how "heat shrink tubing" works. Note -- the rubber band's length was permanently changed by the hot air, correct?
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