<p>The Collegeboard Course Outline tells that only Fluid Thermal Wave Optics Atomic and Nuclear are in B but not in C.
Since these are quite easy I can just prepare them with the free Peterson’s Guide online.</p>
<p>But , is it necessary to buy a Barron’s or PR’s Physics B guide to prepare the things that are covered in the Physics C? </p>
<p>I am currently using a Barron’ Physics C now.</p>
<p>Thanks.</p>