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History

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First Congress of the Communist International

NOTES [172] The First Congress of the Communist International met in Moscow from March 2-6, 1919. In January 1919 a meeting of representatives from a number of Communist Parties and Left-wing...
hyperphysics.phy-astr.gsu.edu

Magnetic Field of the Earth

The Earth's magnetic field is similar to that of a bar magnet tilted 11 degrees from the spin axis of the Earth. The problem with that picture is that the Curie temperature of iron is about 770 C . The...