How does the gravity anomaly of an infinite slab of a constant thickness depend on its depth? - thickness of an ohio drivers licence
I think it has something to do with the Bouguer. It is quite similar to the definition of the Bouguer, British Columbia, depends on the depth, but I would not say I know how a gravity anomaly of an infinite plate of constant thickness of the depth depends! Any help on this would be appreciated! Thank you in advance.
Sunday, February 7, 2010
Thickness Of An Ohio Drivers Licence How Does The Gravity Anomaly Of An Infinite Slab Of A Constant Thickness Depend On Its Depth?
2 comments:
The attraction between two objects varies with distance from the law of gravity.
Suppose you have a body to a depth of 200 meters and meter reading of gravity on the Earth's surface is 16 units.
If you bury the body itself, which is 400 m depth (twice as deep), then the effect of gravity, reduced by a factor of 4.
That is double the depth (2), the power of 2 raised. And 2 ^ 2 = 4. Therefore, the new reading, 16 / 4 = 4 units.
When the body is buried 3-times the original depth of the effect of gravity is at 1 / 9 or the original value. Since 3 ^ 2 = 9.
The new value is 16 / 9 = 1.78
Here is a good site that talks about the topography of gravity that can help. I've included some excerpts.
Studies of gravity as the acceleration of gravity, g. The average value of G on the surface of the earth is 9.80 ms-2.
The gravitational force depends on the density of the underlying rocks, and the value of g, depending on the surface of the earth.
Density, the parameter R, the natural gravity surveys is sensitive.
If the earth is a uniform sphere, g is constant. However, gravity varies due to the density varies in the earth and the earth is not a perfect sphere.
The density is greater than the depth of burial:
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