PRELIM II ANSWERS
November 8, 2012
Day and Time of Your
Complete academic integrity is expected of all students of Cornell University at all
times, whether in the presence or absence of members of the faculty or teaching staff.
Understanding this, I declare that I shall not give, use, or receive unauthorized aid
in this examination.
There are 6 (multipart) questions and a total of 13 pages (including this cover sheet, a blank
page after all the questions, a page of potentially useful facts and a periodic table at the end).
Make sure that your examination booklet is complete.
The prelim is not designed with the idea
that all, or necessarily any of you, will complete each and every question. Work strategically; if you
find a problem that seems to require a large amount of time, you should probably work on other
questions first. . . and when you return, try a different approach!
Write your answers directly on these sheets.
Use the blank page, or if necessary the backs of
pages, but clearly indicate on the problem page where work can be found.
If you need to include
additional pages, please attach them securely to the rest of the test book. Be brief, concise, and
neat. Proctors are not allowed
to interpret questions for you. No additional formulas, or values of
fundamental constants, are required to answer these questions; if you believe that there is missing
information, please check to make sure that you have taken advantage of any information provided
to you in the problem.
You may leave when you are finished, except in the final minutes of the exam. Please do so
quietly after turning your paper.
Show your work! (Unless you don’t care to receive partial credit).