PHYS W80/IDIS W83 Biophysics. Biophysics is a growing discipline in which the tools of physics are used to elucidate biological systems and develop advanced medical technology. The course covers a broad spectrum of topics, including why ants can easily lift many times their own weight, how CAT and PET scans work, how bees fly, and why our lungs must be coated with surfactant (biological soap). Medical biophysics is emphasized, both in using physics to understand the human body and in explaining how medical devices work. An additional feature of the course is that no calculators are used. All results are achieved by estimation, with a focus on learning the art of approximation. The class is highly participatory and the hope is that students will make the application of physical reasoning to biophysical systems their own, so that they can draw on this skill in the future. In addition to the above items, there is also a section devoted to the construction of simple biophysical simulations using the open source software package Sage. Note that no previous experience with simulations or Sage is needed. This course may fulfill an elective in the Biology major. Prerequisites: a semester of algebra based college physics or a year of algebra based high school physics. P. Harper. 2:00 p.m. to 5:00 p.m.