P25_044 - 10 9 N m 2 C 2 " 1 1 . 5 m 1 p (1 ....

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44 .L e t r =1 . 5m, x =3 . 0m, q 1 = 9 . 0nC,and q 2 = 6 . 0 pC. The work done by an external agent is given by W =∆ U = q 1 q 2 4 πε 0 µ 1 r 1 r 2 + x 2 =( 9 . 0 × 10 9 C)( 6 . 0 × 10 12 C) µ 8 .
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Unformatted text preview: 10 9 N m 2 C 2 " 1 1 . 5 m 1 p (1 . 5 m) 2 + (3 . 0 m) 2 # = 1 . 8 10 10 J ....
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