A uniform electric field of magnitude 640 N/C existsbetween two parallel plates that are 4.00 cm apart.A proton is released from rest at the positive plate atthe same instant an electron is released from rest at thenegative plate. (a) Determine the distance from thepositive plate at which the two pass each other. Ignorethe electrical attraction between the proton and elec-tron. (b) What If? Repeat part (a) for a sodium ion(Na*) and a chloride ion (CI¯).

The Electrostatic force on an electron can be expressed as:F=qEUsing the Newton's Second law of…

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