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A point charge with 72 μC sits at the origin, while another point charge of -12...

A point charge with 72 μC sits at the origin, while another point charge of -12 μC sits at x = 6.8 m. What is the electric force on the -12 μC charge?
-1.144 N to the RIGHT
-1.144 N to the LEFT
-1.682×10-1 N to the RIGHT
-1.682×10-1 N to the LEFT

A third charge of -6 μC is placed at x = 1.7 m. What is the magnitude of the TOTAL electric force on the -12 μC charge? (in N)

-1.542x10^-1

1.822x10^-1

1.433x10^-1

1.931x10^-1

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