problem21_47

# University Physics with Modern Physics with Mastering Physics (11th Edition)

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21.47: a) At the origin, . C N ˆ 4800 ˆ ) m 15 . 0 ( ) C 10 0 . 6 ( 2 4 1 2 9 0 i i E - = × - = - πε b) At : 0 , m 3 . 0 = = y x . C N ˆ 2133 ˆ ) m 45 . 0 ( 1 ) m 15 . 0 ( 1 ) C 10 0 . 6 ( 4 1 2 2 9 0 i i E = - × = - πε c) At : m 4 . 0 , m 15 . 0 - = = y x + - - × = - j i j E ˆ 5 . 0 4 . 0 ) m 5 . 0 ( 1 ˆ 5 . 0 3 . 0 ) m 5 . 0 ( 1 ˆ ) m 4 . 0 ( 1 ) C 10 0 . 6 ( 4 1 2 2 2 9 0 πε C N 209 C N ) ˆ 5 . 164 ˆ 6 . 129 ( = - - = E j i E and ° = 232 θ clockwise from - x + axis.
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