Which of the following items is most sensitive to increased acidity in the environment? concrete buildings
glass windows
railroad tracks
paved roads

Answershe should not have multiplied the sulfur atoms by the subscript 4

The answer is 4f======since electrostatic force is given by    we let f be the electrostatic force when  r = 1 m    if we let  denote the electrostatic force when the distance is decreased so that r = 0.5m, then    we established earlier that f = kq₁q₂. therefore    the force will now be 4f.