Hank explains how the constants in the gas law aren't all that constant. The ideal gas law has to be corrected for volume because atoms and molecules take up space and for pressure because they're attracted to each other. Einstein was behind a lot more of what we know today than most people realize, but a Dutch scientist named Johannes van der Waals figured out those correction factors in the late 19th century and earned a Nobel Prize for his efforts. [11:34]