Work out the strength of the extra force which would need to be added in order to achieve equilibrium (zero resultant force).

Global warming was a major concern some people do not care global warming is fake it is not real the percentage of it happening  is slight 

Answerthe force between the charges will be  f/9 (one-ninth of force f)explanationcoulomb's law relates the magnitudes  two point charges q₁ and q₂, the distance, r, between the charges, and the electrostatic force, f, between the two charges:     k represents coulomb's constant, k = 8.99×10⁹ n·m²/c².note that if we have r = 3r, then   

Answerthe distance between the two ends of the galaxy is 150,000 light years;

Not sure but i think it's b.