4) Four charged particles are placed so that each particle is at the corner of a square. The sides of the square are 20 cm.
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4) Four charged particles are placed

so that each particle is at the corner of a square. The sides of the square are 20 cm. The charge at the upper left corner is 2 × 10−6 C, the charge at the upper right corner is −6 × 10−6 C, the charge at the lower left corner is −3.3 × 10−6 C, and the charge at the lower right corner is −8.9 × 10−6 C. The value of the Coulomb constant is 8.98755 × 109 N · m 2 /C 2 . Assume right and upward are positive. Answer in units of N.

a) What is the magnitude of the net electric force on the +2 × 10−6 C charge in the upper left corner?

b) What is the magnitude of the net electric force on the −6 × 10−6 C charge in the upper right?

c) What is the magnitude of the net electric force on the −8.9 × 10−6 C charge in the lower right?

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