<p>Physics C was broken up into two parts so college board could charge you twice for one test, and give you a chance to opt out of one of the halves if you’re not as good at it. Despite having two tests, its often considered just as one big curriculum. </p>
<p>For the link I gave, the physics C mechanics unit only encompasses part I, while the E&M is everything in part III. Physics B is represented in every area, you just don’t have to know the stuff checked off for C only. As stated by people before, C doesn’t include fluids, waves, optics, and nuclear stuff.</p>