Which of the following is not true concerning the effects of pollutants on exercise? a. pollutants can cause dehydration. b. pollutants can impair respiratory and cardiovascular systems. c. pollutants usually surround large roads and freeways. d. pollutant advisory warnings should be ignored.

What is the thinnest soap film (excluding the case of zero thickness) that appears black when illuminated with light with a wavelength of 480 ? the index of refraction of the film is 1.34, and there is air on both sides of the film. express your answer in nanometers. hint 1. how to approach th