The three point charges +4.0 μC, -5.0 μC, and -9.0 μC are placed
on the x-axis at the points x = 0 cm, x = 40 cm, and x = 120 cm,
respectively. What is the x component of the electrostatic force on
the -9.0 μC charge due to the other two charges? (k =
1/4πε0 = 9.0 × 109 N ∙
m2/C2)
The three point charges +4.0 μC, -5.0 μC, and -9.0 μC are placed on the x-axis at the points x = 0 cm, x = 40 cm, and x
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