Mellinia Posted January 14, 2011 Share Posted January 14, 2011 The Earth's magnetic field is close to the gravity field?..so... Link to comment Share on other sites More sharing options...
timo Posted January 14, 2011 Share Posted January 14, 2011 Magnetism is being considered part of electromagnetism. There is no theory which relates electromagnetism to gravity, despite quite a long history of looking for such a unification (often called "theory of everything" in popular culture). Link to comment Share on other sites More sharing options...
Mellinia Posted January 14, 2011 Author Share Posted January 14, 2011 Because a strong enough magnet could induce a dia- or paramagnetic matter into a temporary magnet, right, just like gravity, in which a large mass, eg earth could attract you and me. Link to comment Share on other sites More sharing options...
swansont Posted January 14, 2011 Share Posted January 14, 2011 The earth's magnetic field is basically a dipole, which is a very different shape that the gravity. Link to comment Share on other sites More sharing options...
Mellinia Posted January 15, 2011 Author Share Posted January 15, 2011 strangely, both poles have the strongest gravitational force on land? Can someone do an experiment to see if there is a difference of G force at the geographical pole and the magnetic pole, take into account the altitude? Link to comment Share on other sites More sharing options...
insane_alien Posted January 15, 2011 Share Posted January 15, 2011 strangely, both poles have the strongest gravitational force on land? Can someone do an experiment to see if there is a difference of G force at the geographical pole and the magnetic pole, take into account the altitude? thats because the earth isn't spherical. the strongest gravitational field is a few thousand kilometers away from the magnetic poles as the magnetic poles are not at the geographic poles. Link to comment Share on other sites More sharing options...
Mellinia Posted January 15, 2011 Author Share Posted January 15, 2011 really? the experiments have been made? Link to comment Share on other sites More sharing options...
D H Posted January 15, 2011 Share Posted January 15, 2011 strangely, both poles have the strongest gravitational force on land? Correct. g varies from 9.780 m/s2 at the equator to 9.832 m/s2 at the poles. This is because the Earth is rotating. It has nothing to do with magnetism. Earth gravity, g, is defined as the local free-fall acceleration as observed by someone at rest on the surface of the Earth. This makes g at some location on the Earth equal to the scale weight of some object at that location divided by the object's mass. From the perspective of an observer at rest on the Earth, an apparent centrifugal force due to the Earth's rotation acts to slightly counter the downward force due to gravitation. Physical geologists distinguish gravitation and gravity. Local gravity, g, accounts for both gravitation and this centrifugal force. This centrifugal acceleration various from 0 m/s2 at the poles to 0.0034 m/s2 at the equator. Note that gravity is about 0.0052 m/s2 higher at the poles than at the equator. Centrifugal acceleration accounts for about 65% of this difference. The remaining 35% results from the Earth's equatorial bulge (which is also caused by the Earth's rotation). A person at sea level at the North Pole is 22 km closer to the center of the Earth than is someone at sea level at the Equator. Newton's law of gravitation says that for a point mass, gravitation due to the point mass is inversely proportional to the square of the distance from the mass. While the Earth is not a point mass, this 22 km difference in proximity to the center of the Earth does indeed account for the remaining 35% of the difference in g. Link to comment Share on other sites More sharing options...
Mellinia Posted January 15, 2011 Author Share Posted January 15, 2011 ah, so magnetism is not linked to gravitation. What are paramagnetic and diamagnetic particles? Link to comment Share on other sites More sharing options...
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