problem21_07

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

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21.7: a) Using Coulomb’s Law for equal charges, we find: . C 10 42 . 7 C 10 5.5 m) 150 . 0 ( 4 1 N 220 . 0 7 2 13 2 2 0 - - × = × = = = q q πε F b) When one charge is four times the other, we have: C 10 71 . 3 C 10 375 . 1 m) 150 . 0 ( 4 4 1 N
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