# Physics

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.

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1. 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 force of zero?

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posted by Bin
2. F = m a

F = E q same for both where q = electron charge, + for proton, - for electron

m = mass electron for electron
m = mass proton for proton

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posted by Damon

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