Assume that a ball of charged particles has a uniformly distributed negative charge density except for a narrow radial tunnel through its center, from the surface on one side to the surface on the opposite side. Also assume that we can position a proton anywhere along the tunnel or outside the ball. Let FR be the magnitude of the electrostatic force on the proton when it is located at the ball's surface, at radius R. As a multiple of R, how far from the surface is there a point where the force magnitude is 0.78FR if we move the proton (a) away from the ball and (b) into the tunnel? (a) Number Units (b) Number Units

Assume that a ball of charged particles has a uniformly distributed negative charge density except for a narrow radial tunnel through its center, from the surface on one side to the surface on the opposite side. Also assume that we can position a proton anywhere along the tunnel or outside the ball. Let FR be the magnitude of the electrostatic force on the proton when it is located at the ball's surface, at radius R. As a multiple of R, how far from the surface is there a point where the force magnitude is 0.78FR if we move the proton (a) away from the ball and (b) into the tunnel? (a) Number Units (b) Number Units

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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Assume that a ball of charged particles has a uniformly distributed negative charge density except for a narrow radial tunnel through
its center, from the surface on one side to the surface on the opposite side. Also assume that we can position a proton anywhere along
the tunnel or outside the ball. Let FR be the magnitude of the electrostatic force on the proton when it is located at the ball's surface, at
radius R. As a multiple of R, how far from the surface is there a point where the force magnitude is 0.78FR if we move the proton (a)
away from the ball and (b) into the tunnel?
(a) Number
Units
(b) Number
Units

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