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Homework Help: Singly charged?

  1. May 3, 2004 #1
    "Singly ionized"? What the...?

    I have a problem where I'm trying to figure out the spring constant of a DNA molecule whose ends become "singly ionized" and so it contracts. The only problem is, I don't know what the question means by "singly charged." I would assume that it means that each side assumes opposite charges with a magnetude of the elemenary charge, but I'm not sure. I'll include the exact wording of the question if that helps:

    A molecule of DNA is 2.17 micrometers long. The ends of the molecule become singly ionized--negative on one end and positive on the other. The helical molecule acts like a spring and compresses by 1.00% upon becoming charged. Determine the spring constant of the molecule.
    Last edited: May 3, 2004
  2. jcsd
  3. May 3, 2004 #2
    I think your interpretation is correct.

    Of course, that's no guarantee. :)
  4. May 3, 2004 #3


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    I second the motion.
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