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A sphere of ferromagnetic material is heated as it is compressed from an initial radius of 2.54 cm to 1.91 cm. If all of the

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A sphere of ferromagnetic material is heated as it is compressed from an initial radius of 2.54 cm to 1.91 cm. If all of the atoms in the sphere originally had their magnetic moments aligned, what fraction of them must remain aligned in the final, compressed sphere if the magnetization of the sphere has not changed? HI

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