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by hwillis
1114 days ago
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Local surface gravity varies by up to a ten-thousandth, about .001 m/s: https://en.wikipedia.org/wiki/Gal_(unit) Sensitive detectors can measure differences in hundreds of millionths (10^-8 parts) or around .1 um/s^2. A 1 million tonne mass on the other side of the earth will create a TOTAL acceleration of 4*10^-16. Changes in that will not be detectable. |
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