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A due to gravity

  1. Sep 28, 2005 #1
    Hello All,

    Would anyone happen to know where I can find an "exact" measurement of the acceleration due to gravity at a (almost) precise location on the earth's surface? Anywhere in the Rocky Mountain region would be fine. Thanks!
     
  2. jcsd
  3. Sep 28, 2005 #2
    a=9.81 m/s^2
     
  4. Sep 28, 2005 #3

    pervect

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    In the US,

    http://tin.er.usgs.gov/gravity/bouguer/

    looks like a good source (if you can get the ftp link to work)

    but the data will be gravity anomaly data, there's some discussion of the formulas used in the wikipedia

    http://en.wikipedia.org/wiki/Gravity_anomaly

    Google gives lots of other hits, too many to mention, some state specific.
     
  5. Sep 28, 2005 #4
    Oh, just get yourself a simple gravimeter from your local university geology dept. and take your own measurements.

    However, if you happen to have a load of liquid He and alot of free time ( like 24 months just to read the manual), then I suggest you get a top of the line superconducting gravity meter from these guys:he,he :biggrin:
    http://www.gwrinstruments.com/GWR_ctspec.html
     
    Last edited: Sep 28, 2005
  6. Sep 29, 2005 #5

    HallsofIvy

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    The "precise location of the earth's surface"?? And where would that be? There's a heckuva lot of "earth's surface" in the region of the Rockies and a lot of people on earth who would think it would be more reasonable to use the gravitational acceleration at sea leve rather than anywhere near the Rockies!

    Edit- sorry, I misunderstood your question.
     
    Last edited: Sep 30, 2005
  7. Sep 29, 2005 #6
    Hows about going there yourself and using an ultra-fine weight scale, and standing on it, move on, do it again. But you might have to "Invent" to find a scale with that kind of accuracy.
     
  8. Sep 30, 2005 #7
    Thanks Creator and Pervect-- The rest of you are quite useless, but thanks anyway!
     
  9. Oct 1, 2005 #8
    Useless? humor is useless? somebody 'aughta tell you fella :rofl:


    :rofl: :rofl: :rofl: :rofl: :rofl: :rofl: :rofl: :rofl: :rofl: :rofl: :rofl: :rofl: :rofl: :rofl: :rofl: :rofl:
     
    Last edited: Oct 1, 2005
  10. Oct 1, 2005 #9
    Sorry. My english is not very good. I did not catch the humor, and I did not mean to sound like a jerk.
     
  11. Oct 2, 2005 #10
    You didn't, you aren't and My apologies if I seemed somewhat disconcerted in my attempt at humor.

    Not as good at it, sometimes, as I would like to think myself, as being.

    :biggrin: :biggrin:
     
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