A charge of -20 nC is placed in a region with constant electric field of 4.5 x 10^5 N/C directed in the +y direction. What is the magnitude of the force on the negative charge? a. 0.0090 N b. 9.0 N c. 900 N  d. 9000 N  e. 9.0 x 10^5 N  f. None of the above

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