<p>Physics 7A labs are just a worksheet that you’re required to complete during the class period. Virtually everyone who completes the worksheet is given full credit. That hardly constitutes being a “lab course” like chemistry or computer science. Lab is effectively another discussion in this case, as there is nothing you do outside of class. CS61A is a completely different story, of course.</p>
<p>And the minimal lab work, coupled with the fact that only one fairly short homework assignment is assigned per week, means that Physics 7A is probably less work than a math course (which can have multiple assignments per week).</p>
<p>Anyways, 20 units is a bit much, but it’s doable because the classes aren’t that difficult (except for 61A). Expect a lot of overlaps of midterm days (even potentially 2-3 on the same day). And if you want all A’s you’ll be working quite a bit more than most people you will meet. Don’t expect to have free time.</p>