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An electron has a spin magnetic moment of magnitude ? = 9.285·10–24 A m2. Consequently, it has energy associated with its orientation in a magnetic field. If the difference between the energy of an electron that is "spin up" in a magnetic field of magnitude B and the energy of one that is "spin down" in the same magnetic field (where "up" and "down" refer to the direction of the magnetic field) is 5.601·10–25 J, what is the field magnitude, B?

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