The magnetic moment of the earth is about 9 1022 A m2. (a) If the
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The magnetic moment of the earth is about 9 × 1022 A · m2.
(a) If the magnetization of the earth's core were 1.5 × 109 A/m, what is the core volume?
(b) What is the radius of such a core if it were spherical and centered with the earth?
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