PhyFl18-2.5.33Kinetic theory needs to be brought up to start to understand why the a vs. t graph is not parabolic in shape. Basically, Kinetic THeory says that everything is made os molecules (this idea is only a little over 100 years old). Phillip Leonard was a jerk and turned out to be a Nazi, but he WAS right about molecules. Einstein believed him, but he hated Einstein because he was a Jew. Can you believe that? That is like thinking someone is less than you because of the color of their skin. What kind of a monster would ever believe that? Anyway . . . the air molecules in this room are moving about 800-900 mph. You like that because it makes your skin vibrate at just the right frequency. Ahhhh. . . warmth.