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General Science / Is the centre of the earth a plasma?
« on: 11/04/2013 17:48:42 »
If magnetism is lost when the magnetic material is heated.
The curie temperature for a low carbon steel is 770oC or 1390oF.
And the center of the earth is beleived to be much much hotter.
Then isen't all magnetism lost or non existant at the core?
Earths diameter at the equator is 7,926.28 miles. We have seismic refraction measurements that put the thickest parts of the continents/crust at 35 miles thick. Understanding the ocean crust is not as thick but the H2O is very conductive especially with high salt content. For a base lets say the the whole earth has a "cool" enough shell that it can and is magnetic.
So most of the earth would be non magnetic. Unless Alfven waves and plasma was present?
The sun is 10s of thousands of degees yet is magnetic? It ejects plasma.
Simply earth without the solid crust?
The curie temperature for a low carbon steel is 770oC or 1390oF.
And the center of the earth is beleived to be much much hotter.
Then isen't all magnetism lost or non existant at the core?
Earths diameter at the equator is 7,926.28 miles. We have seismic refraction measurements that put the thickest parts of the continents/crust at 35 miles thick. Understanding the ocean crust is not as thick but the H2O is very conductive especially with high salt content. For a base lets say the the whole earth has a "cool" enough shell that it can and is magnetic.
So most of the earth would be non magnetic. Unless Alfven waves and plasma was present?
The sun is 10s of thousands of degees yet is magnetic? It ejects plasma.
Simply earth without the solid crust?