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28. An electron at rest at P - (5, 3,7) moves along a path ending at Q (1, 1, 1) under the influence of the electric field (in newtons per coulomb) F(x, y, z)-400(x2 + Z2)-1 (x, 0, z) (a) Find a potential function for F. (b) What is the electrons speed at point Q? Use Conservation of En- ergy and the value qe me1.76x 101 C/kg, where qe and me are the charge and mass on the electron, respectively.

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贝2422 ィ ( Q co en 12(2,-2) ) 2) o-yo, (22) yooz.f. ご @rw ening々at-Hw raert Quell b Ve (VCLII-v (5,3,7))

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