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Electric Charges, Forces, and Fields - University of Tennessee
relative signs of the charges. Physics 231 Lecture 1-6 Fall 2008 Electric Force The force acting on each charged object has the same magnitude -but acting in opposite directions F12 F21 r r = (Newton’s Third Law) ... permittivity of free space. 2 2 12 0 0 C 8.854 10 4 1 Nm
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