Guess at slowing of Earth spin

Discussion in 'Physics & Math' started by Billy T, Mar 11, 2006.

?

How big is "SLIGHTLY" (in first post of Billy T if not here)

Poll closed Mar 25, 2006.
  1. Less than 1.0E-4Meters

    58.8%
  2. Less than 1.0E-2Meters

    5.9%
  3. Less than 1Meter

    17.6%
  4. Less than 100Meters

    5.9%
  5. Less than 1000Meters

    0 vote(s)
    0.0%
  6. More than 1000Meters

    11.8%
  1. Tortise Registered Senior Member

    Messages:
    227
    Yes. But the idea of maping atoms and creating an exact replaca might get around this. Sinse knowing the exact position and speed/direction of atoms in imposible according to the uncertainty princible, a quantum model might have to be used. But this is just reiterating what has already been said before. Michael Chrichton made a book about a time machine that used MRI technology - MRIs map the position of hydrogen atoms. Food for thought.
     
    Last edited: Mar 27, 2006
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  3. DaleSpam TANSTAAFL Registered Senior Member

    Messages:
    1,723
    I work with MRI. They do map the position of hydrogen, but the sensitivity is incredibly low. You have to have supermolar concentrations to get any signal at all. Typically only 6 atoms per million are detectable, and then it takes millions of those to generate a detectable signal.

    -Dale
     
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  5. Tortise Registered Senior Member

    Messages:
    227
    Hi Dale, I used to work in a related field (CT) it's nice to know that there are other people on here that have similar backgrounds to me.
     
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  7. DaleSpam TANSTAAFL Registered Senior Member

    Messages:
    1,723
    Cool! I don't know if you still keep up with the field, but there is some really interesting work being done on using carbon nanotubes as a low temperature electron source for x-ray generation. Could be used to have multiple really fast-switching sources so you could do without the spinning tube and detectors arrangement.

    -Dale
     
  8. Tortise Registered Senior Member

    Messages:
    227
    No, I haven't heard about that - it sounds very interesting - and if you had not said it, I would have insisted that it was BS
     
    Last edited: Apr 27, 2006

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