How much energy is stored in a room 3.0 m by 4.0 m by 2.4 m due to the earth's magnetic field with a strength of 5.0 × 10-5 T? (?0 = 4? × 10-7 T • m/A)
A) 29 mJ B) 57 mJ C) 10 mJ D) 100 mJ E) 570 mJ
A
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