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shows electrons 1 and 2 on an x axis and charged ions 3 and 4 of identical charge −q and at identical angles θ. Electron 2 is free to move; the other three particles are fixed in place at horizontal distances R form electron 2 and are intended to hold electrons 2 in place. For Physically possible values of q≤9e, what are the third smallest value of θ for which electron 2 is held in place?
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2
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