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Q. A proton is released from rest in a uniform electric field of magnitude 1.20×10^5 N/C. Find the speed of the proton after it has traveled (a) 1.70 cm and (b) 11.0 cm.

Q. Three positive charges are located at the corners of an equilateral triangle. Find an expression for the electric potential at the center of the triangle. (Use the following as necessary: ke, Q, and d.)

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