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A proton and an electron are moving due east in a constant electric field that also points due east. The electric field has a magnitude of 8.0 ¡Á 104 N/C. Determine the magnitude of the acceleration of the proton and the electron.

Identical point charges of +1.1 ¦ÌC are fixed to three of the four corners of a square. What is the magnitude q of the negative point charge that must be fixed to the fourth corner, so that the charge at the diagonally opposite corner experiences a net fo...