determine numerical values for the average velocity, average speed and average energy in problem la) if a) the particles are electrons, and if b) the particles are oxygen ions (o for t-0° k, t-300 k (86° f), and t-1000° k. express the values of average energy both in joules and in electron volts (1 ev = 1 volt times 1.6 x 10-19 coul.)

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.