28. ** Two small spheres with charges q₁ =+ 8 nC and q2 =- 4 nC are placed at marks x₁ = 2 cm and x₂ = 13 cm. Where along the x-axis should you place a third sphere with charge 93 so that (a) the sum of the forces exerted by the first two spheres on the third one is zero, and (b) the total electric potential energy of the three spheres does not depend on 93?

28. ** Two small spheres with charges q₁ =+ 8 nC and q2 =- 4 nC are placed at marks x₁ = 2 cm and x₂ = 13 cm. Where along the x-axis should you place a third sphere with charge 93 so that (a) the sum of the forces exerted by the first two spheres on the third one is zero, and (b) the total electric potential energy of the three spheres does not depend on 93?

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter1: Units, Trigonometry. And Vectors

Section: Chapter Questions

Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...

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