<p>Four books are listed on bkstr.com for Physics 7B. One of them is:</p>
<p>STUDENT ACCESS CODE CARD (COLLEGE SEMESTER) -- WEBASSIGN</p>
<p>What is this?</p>
<p>weekly online homework assignments. you can sign up online. problems are straight out of your texts, but webassign changes the numbers slightly so you guys can't blatantly copy each other.</p>