You will find Homework 13 ready in Webcourses, due Thursday morning for section 0003 and on Friday morning for section 0004. It will be helpful to have chapter 11 of the textbook open as you work through this assignment.
BONUS: In the bonus podcast area of iTunes U, there is a special mini-podcast about Exercise 11.5, about ham sandwiches. This podcast will help you with some of the homework. Good.
Also, there is an extra readings page in the homework, which links you to short biographies of Thales, Aristotle and Lavoisier, about whom we talked in lecture.