Cars are safety tested to see how quickly they come to a stop under many conditions. the distance and time of one of these tests is graphed. what is the change in velocity during the first second? a) 20 m/s eliminate b) 30 m/s c) 0 m/s d) 50 m/s

When you see distant streetlights through smog, they look dimmer and redder than they do normally. but when you see the same streetlights through fog or falling snow, they look dimmer but not redder. use your knowledge of the interstellar medium to discuss the relative sizes of the particles in smog, fog, and snowstorms compared to the wavelength of light.