Two similar metal spheres, A and B, have charges of +2.0 × 10-6 coulomb and +1.0 × 10-6 coulomb, respectively, as shown in the diagram below.
The magnitude of the electrostatic force on A due to B is 2.4 newtons. What is the magnitude of the electrostatic force on B due to A?
1. 1.2 N
2. 2.4 N
3. 4.8 N
4. 9.6 N
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