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K0DPW
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Given the increase in geophysical phenomena (such as earthquakes and volcanic eruptions), it is obvious "something" IS going on with our planet. I have no trouble believing in this theory that a reversal of the Earth's magnetic field may be included -- sooner as opposed to later.
However, no one has been able to satisfactorily explain to me the following contradiction:
It is said the Earth's magnetic field derives from its iron core;
furthermore, due to supposedly the intense pressures and temperatures at the center of the earth, this core is said to be a MOLTEN iron core;
yet if a magnet is HEATED, it LOSES its magnetic characteristics and properties.
"above a certain temperature ("Curie point"), iron loses all its magnetism"
http://en.wikipedia.org/wiki/Curie_temperature
When a magnetic material reaches its curie temperature point and supposedly the magnetic moments are jumbled up no longer uniform aligned, as inter-related as magnetic and electrical fields are, it should result in corresponding jumbling of the associated electrical fields as well.
Yet, we have the dynamo theory that is said to explain this.
http://en.wikipedia.org/wiki/Dynamo_theory
As I understand the dynamo theory, electrically conducting material, even though at or above the curie temperature and therefore having lost "internal magnetism", but still capable of "conducting electrically" produce enough electrical current activity to generate an "external" magnetic field.
Yet, electrical current flows best at super COLD temperatures ("super conductors" due to lack of resistance), and heat INCREASES resistance to electrical flow.
But magnetic materials, having lost their "internal magnetic" properties due to at or above their curie temperatures, are still said to realign magnetic domains under the influence of an EXTERNAL magnetic field; as applied to the planet earth, such would have to come from the sun.
So, perhaps the Earth's magnetic field is only indirectly resultant from an iron external/internal core (molten or otherwise), and more directly resultant from the solar magnetic field itself instead.
I think a Noble prize in physics for pointing this out is in order; but I imagine someone else will get the credit and the million bucks.
http://news.yahoo.com/Earth's-magnetic-field-could-flip-lifetime-111411521.html
http://en.wikipedia.org/wiki/Geomagnetic_reversal
http://www.phy6.org/earthmag/dmglist.htm
However, no one has been able to satisfactorily explain to me the following contradiction:
It is said the Earth's magnetic field derives from its iron core;
furthermore, due to supposedly the intense pressures and temperatures at the center of the earth, this core is said to be a MOLTEN iron core;
yet if a magnet is HEATED, it LOSES its magnetic characteristics and properties.
"above a certain temperature ("Curie point"), iron loses all its magnetism"
http://en.wikipedia.org/wiki/Curie_temperature
When a magnetic material reaches its curie temperature point and supposedly the magnetic moments are jumbled up no longer uniform aligned, as inter-related as magnetic and electrical fields are, it should result in corresponding jumbling of the associated electrical fields as well.
Yet, we have the dynamo theory that is said to explain this.
http://en.wikipedia.org/wiki/Dynamo_theory
As I understand the dynamo theory, electrically conducting material, even though at or above the curie temperature and therefore having lost "internal magnetism", but still capable of "conducting electrically" produce enough electrical current activity to generate an "external" magnetic field.
Yet, electrical current flows best at super COLD temperatures ("super conductors" due to lack of resistance), and heat INCREASES resistance to electrical flow.
But magnetic materials, having lost their "internal magnetic" properties due to at or above their curie temperatures, are still said to realign magnetic domains under the influence of an EXTERNAL magnetic field; as applied to the planet earth, such would have to come from the sun.
So, perhaps the Earth's magnetic field is only indirectly resultant from an iron external/internal core (molten or otherwise), and more directly resultant from the solar magnetic field itself instead.
I think a Noble prize in physics for pointing this out is in order; but I imagine someone else will get the credit and the million bucks.
http://news.yahoo.com/Earth's-magnetic-field-could-flip-lifetime-111411521.html
http://en.wikipedia.org/wiki/Geomagnetic_reversal
http://www.phy6.org/earthmag/dmglist.htm
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