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An electron passes through a region in which there is an electric eld, and while it is in the region its kinetic energy decreases by

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An electron passes through a region in which there is an electric eld, and while it is in the region its kinetic energy decreases by 2.6 X 10'17 J. Initially the kinetic energy of the electron was 3.5 X 10'17 J. What is the nal speed ofthe electron? (You can use the approximate {nonrelativisticl equation here.) v: n m/s

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