Physics 214b-2008 Exam 1 Haverford College Walter Smith
Exam Guidelines:
1. IMPORTANT:
Shortly before beginning the exam, you must check your e-mail, and also
send an e-mail to wsmith@haverford.edu
to notify me that you’re about to start.
This way, if there are last minute corrections, it will be easy to
distribute them to the rest of the class.
If you find something on the exam which is erroneous or ambiguous, call
me immediately (Office: 610-896-1332, Home 610-896-1565), even if it’s very
late at night! Although I try
extremely hard to make everything completely clear, it is sometimes difficult
to anticipate the way that others might interpret the problems. If you call me, we can straighten it out, and
using the e-mail mechanism above, we can straighten it out for the other
students, also.
2. This is a 120 minute, take-home
exam. It must be completed in one
continuous sitting (i.e., the clock doesn’t stop if you take a break).
3. No books, notes, etc. of any kind are
permitted, with the exception of a “summary sheet” which may contain up to 20
equations.
4. You should
have a calculator to take this exam. If
your calculator has graphing, programmable, or symbolic algebra/calculus
features, your may not use these during the exam. You may not use Mathematica. You should have a ruler marked in mm and cm.
5. This exam contains four problems. When you’re ready to begin, please check that
all are present.
6. For each problem, circle your final answer.
7. The exam is to be turned in to the envelope
outside my office (L110) by 4:00 Wednesday.
Please do not turn in this exam itself or your equation sheet; only turn
in your examination book. You should
carefully keep this exam for future reference when your graded exam is returned.
8. Please note your starting and ending times on
the front cover of the examination book.
9. Use three significant digits on all problems,
unless otherwise indicated.
Some Words of Advice:
I look forward to giving you partial credit for your work. To receive credit, present your work in a clear, readable format. If you find yourself stuck on a problem, don’t panic. Instead, carefully explain what you do know about the problem, what you think is going on, and how you might proceed if you could somehow get yourself “unstuck” from the part of the problem that is giving you trouble. Remember, make sure you clearly explain what you write down, since I cannot give partial credit for things I find ambiguous, or for simply copying down equations from your summary sheet. SHOW ALL YOUR WORK! SHOW ALL YOUR WORK IN THE EXAMINATION BOOKLET! Be sure to label your work with the problem number.
IMPORTANT: You will
find some multiple-part problems on the exam.
Even if you can’t get the first part of such a problem, it is almost
always possible to go on and do the other parts!!!!!!!!
There will be some time pressure on this exam. Use the time available wisely.
There are 100 points
total available on the exam.
After You’ve Completed the Exam:
1. Indicate your ending time on the front cover of your examination booklet.
2. Please sign the honor code pledge on the front cover of your examination booklet.
3. Please do not discuss ANY aspect of this exam with your classmates until I tell you it’s okay (this includes, for example, even such things as whether the exam was easy or difficult, long or short, etc.).
k = 8.999 Nm2/C2 eo = 8.85-12 C2/Nm2 = 1/(4pk) Charge of electron = -e, where e = 1.60-19 C
c = 3.008 m/s mo = 4p-7 N/A2 Mass of electron = me = 9.11-31 kg
h = 6.63-34 J s
= 1.05-34 J
s Mass of proton = mp
= 1.67-27 kg
kB = 1.38-23 J/K NA = 6.022 atoms/mol
, where K is the
spring constant.
, where 
.
.
.
