Finding the force on an electron due to two charges.

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Physics Final Exam
Question 1

There are two charges.

Q1 = - 5 nC located at the origin
Q2 = 4 nC located with the position (0, 0.4, 0) meters.

Find the vector electric force on an electron (charge of -1.6 x 10-19 C) at the location (0.3, 0, 0) meters.
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