16-5 and 16-6 Coulomb’s Law
13. [II] A charge [I is transferred from an initially uncharged plastic ball to an identical ball 24 cmaway. The force of attraction is then 1? mN. HowI many electrons were transferred from one hallto the other? 15. (ll) At each corner of a square of side IE there are point charges of magnitude IE2. 20, 30, and 40(Fig. 16—54]. Determine the magnitude and direction ofthe force on the charge 20. 1?. [III] Two small nonconducting spheres have a total charge of HUD EC. [0} When placed 23.!) cmapart, the force each exerts on the other is 12.0 N and is repulsive. What is the charge on each?(b) What if the force were attractive?
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