P31_064.PDF

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Chapter 31 - 31.64
64. We use 1ly = 9 . 46
×
10 15 m, and use the symbol
V
for volume.
U B =
V
u B = V
= (9 . 46
×
10 15 m) 3 (1
×
10 10 T) 2
=3
10 36 J .
2(4 π
×
10 7 H / m)
B 2
2 µ 0
×
643282722.001.png
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