Physics 116, Section  A

 Oscillations and Waves

 Winter 2005

Epost         -    Umail

Textbook   -    Homework     -    Tycho

Exams         -   Grading          -    General Remarks

Solutions    -   Syllabus              -    Suggested Reading in Other Sources
 

 The answer keys for the exam questions can be found in the Syllabus.
 

Please note that a number of things can change and for accurate information you should always check this web page.
 

Instructor:    Aurel Bulgac
E-mail:         bulgac@phys.washington.edu
Class:           Section A  MTuThF,  12:30 pm - 1:20 pm, PAA A102

Office:                PAB B478
Phone:               (206)685-2988
Office Hours:     W 2:00- 3:00 pm, PAA Study Center AM018  and by appointment.

TA Office hours:      Brian Smigelski    -  M 1:30 - 2:30 pm, W 4:00-5:00 pm, Th 1:00-3:00 pm, F 9:00-10:00 am, PAA Study Center, AM018

Course web page:  http://faculty.washington.edu/bulgac/116W05/index.html
 
 

Epost for Phys 116, Winter 2005

Use Epost to start a discussion group, find buddies to study with, etc.  I shall only ocasionally check this discussion board.
 

Send an anonymous message to the instructor

Unless you sign the message, there is no way for me to know who send the message or the sender's email.
The best thing is to use the link above to my e-mail if you want me to know who you are, as then your e-mail
address will show up. Several times I tried to answer to anonymous e-mails, in which the author sent me an
e-mail address and he/she expected an answer, but the e-mail address supplied was wrong.

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Tycho

Textbook:

Douglas C. Giancoli, Physics, 5th Edition, Prentice Hall.

  You might find the following link of interest and helpful:
  http://cw.prenhall.com/giancoli/

  Suggested reading:
  E-book by David J. Raymond (here you can read about waves in particular)

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Homework assigment:

Homework is not required, but it is strongly advised that you do it. One cannot
master the material unless one is able to solve correctly problems. As a matter
of fact this is how you are going to be tested in exams, but solving problems
and providing exact numerical answers. Unless you practice by solving problems
the most likely outcome of the exams will be failure. As you already know, unlike
many other fields of human inquiry,  physics is an exact science.

You must have a computer account for email and work. Your homework will be
done on the web using a system called Tycho, developed at the University of
Illinois.  This system is still under development and so far it has been greatly
appreciated by the students using it. There are essentially two things we will use:
homework  and  gradebook.

In the homework portion, every week several problems will be posted for you to
solve. As you will discover immediately, there are two types of problems:
a) Standard Homework Problems have a numerical answer. You will get
immediate feedback as to whether the answer supplied is correct or not. In many
problems, you can ask for pre-programmed help. Full credit is given (if done
before the deadline) for the correct answer, independent of how many submissions
were needed to obtain it. b) Interactive Examples are often somewhat more
difficult problems (level 2 or 3 of Giancoli's text). Help in these problems usually
comes in the form of more questions. The hope of the writers is that solution of
these problems will lead to better conceptual understanding rather than just
equation manipulation.

I strongly suggest as well for you to solve the problems at the end of each chapter. They
will not be either graded or required. However, the exams will most likely consist of
problem chosen from the end of the chapters

Each week I shall provide solutions to the end of the chapter problems. The
solutions would be accessible from here with an uid and passwd that I shall provide.
Many students in the past have found these solutions extremely helpful in gaining
a deeper understanding of the material presented in class and in the textbook.
Please note that some of the symbols do not show up correctly, mostly various
Greek letters, so you will have to do some guessing. There is no simple way for
me to correct this.

Click on the link  http://tychosrv.phys.washington.edu/courses/phys116/spring04/
to login into the Tycho sytem and do your graded homework. Follow the
instructions on the login page. Your homework, exam and final grades will be
posted using the Tycho system as well. The sudent database is updated daily
during the first week of the quarter daily and every two days during the second
week. If you experience difficulties login into the Tycho system please write to
Laura Clement   lclement@u.washington.edu.

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Exams - The Rules:   EXAMS MAY NOT BE TAKEN LATE OR EARLY!

THERE WILL BE NO MAKEUPS.  If for some reason you miss one of the midterms,
the one you missed will be your low grade.  Please arrange your vacation schedule
so you take the final exam at the proper time.

There will be three one-hour mid term exams and one final exam. Each hourly
exam (from 12:30 pm to 1:20 pm sharp) will consist of multiple-choice questions
and these will be machine graded. No partial credit will be given. The exams are
closed book, but you will be permitted to have one  8 1/2" x 11" sheet of hand
written notes to aid you, no xerox copies or any other copies of any kind. In
addition you will only be allowed to have a calculator, an eraser,  a #2 pencil and
a pen. Scratch paper will be provided.  Do not forget to bring a bubble sheet
(Standard Answer Sheet). You can get them at the Hub, By George and other
places around the campus.
 

The final exam will be over all the material covered during the quarter. The
problems on the exams will be chosen from  the Tycho homework or the end of the
chapter problems (level II or III of difficulty).  You will be expected to solve
numerically each problem and choose the correct answer among the 4-5 alternatives
suggested.  On a typical exam the average student will provide correct answers
to about 5-7 problems, with a standard deviation of approximately 2.
 

Cheating will be dealt with harshly.

For exam schedule see the Syllabus

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Grading:

Grading will be done on a curve, with the class average being about 2.7. This will
vary depending on the performance of the class as a whole. Approximately 5-10 %
of the class will receive 4.0, and 0.7 will be the lowest passing grade.

Each hourly exam will also count for 25 % of the grade, while the final two-hour
exam will count as two one-hour exams for 25 % of the grade. Your score on each
exam will be normalized so that each exam, regardless of the number of questions
or the difficulty of the exam, will count the same. This score will be converted to
an exam grade point (2.3, 3.2, etc.).  The approximate (it can change!)
formula which will be used to compute each grade for each exam is

Your Grade = (Your exam score - Average exam score)/Standard Deviation + 2.7

At the end of the quarter, your lowest exam  grade will be dropped and your course
grade will be the average of the remaining  three exam grades and, if that is the
case the extra credit for the homework. The graded homework on Tycho is not
required for the grade. However,  if you have worked out the assigned problems
and obtained the correct answers before the posted deadline you can received
up to 0.3 point towards your final grade (on top of the grade based on exam results).
0.3 will be awarded for 100% correct  answers.

The instructor reserves the right to modify this grading procedure in any way as long
as no student receives a course grade lower than one calculated by the method
described above.
 

Partial Credit?

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General remarks

All the mathematics you need to know to be able to take this course is summarized
in Appendix A of the textbook. Please review various number notations, solving
linear and quadratic algebraic equations and systems of 2-3 linear equations
with respectively  2-3 unknowns, plane geometry, areas and volumes and basic
trigonometry.
 

People often ask for suggestions on problems to solve. Let me
say it again here, hopefully, for the last time, as I hate sounding so
professorial, but I am one. As with studying a foreign language, there is
no minimum you can do, after which you become fluent. Even your
native tongue requires a continuous effort to master it, if you care of
course. It is the same with sports, with fitness and essentially
everything else worth knowing and having in life. This is your education
and you are at that age when you are fully responsible for it. You cannot
get away with the idea that you will not need physics in the future. That
is a bunch of BS (which, if you did not guess, does not stand for Bachelor
of Science). You live in the 21st century, so you should have a
minimum science background, unless you want to relate more with people in
caves of course and shoot arrows at clouds when you get angry at gods.
Moreover, this course is more than about physics, it is about teaching
you a new way of thinking, on how to approach problems, to solve them, to
understand Nature and so  forth. This way of thinking is not something you
are born with, to most of us it does not come easy, it is very "unnatural"
but extremely effective. Not even gods had it! They all (at least those
who "took care" of the ancient Greeks) lived in a small village on
top of Mount Olympus, never used cell phones (people in villages hardly
ever need them) never flew to the Moon, or to America, never had TV of CD
players and so forth. I am here to help you,  as I put it often, to "coach"
you. I cannot simply show you how to run, you have to do the running, I
will tell you how much more you need to and where.

So, about problems. Solve ten at random in each chapter, see how
comfortable you are, how long it takes. If it takes too long or you do not
get the correct results, then you need more practice. And go from there.
You will know when you had enough and more practice of this type will
simply blunt your edge. Then you can go to the next level, whatever that
might be. The solutions are given to you mainly to check yourself, not to
read them at once. The same with "meditation", you cannot meditate
for ten minutes every day and then you achieve everlasting happiness or
whatever you are supposed to achieve. It is the same as it was with that
fellow in New York City, who asked "How do I get to Carnegie Hall?" and
the answer was "Practice, practice, practice!"  Nobody ever found another
way, maybe you will, and then lots of students like you will build a
temple to honor you and you will become rich and famous and guys like us
professors will be obsolete. Imagine that, no school at all, ever! At
least no lectures and homework and exams, but keep the parties.

Many would think that having only one small cheat sheet, instead of an open book
exam, makes life harder. You would be surprised to know that is just the opposite.
And to give you an example. I do have a book, which is supposed to help me use
some piece of software. It has just about twice as many pages as the Bible
and even though it's on my shelf, next to me, I hardly ever open it, it
takes forever to find something there.
 

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                                              Tentative Syllabus
 
Dates  Topics Chapter-Section



Jan   3 - 10
  Vibrations and Waves       Chapter  11,  review Chapter 9, section 6
 


Jan 10 - 14
  Waves and Sound        Chapters 11 and 12



Jan 17
  Martin Luther King Day




 Jan 18 - 20
  Review of Faraday's law        Chapter  21



   Friday, Jan 21
                                Exam # 1
 
 

     Version A

      
     Version B   
   

     
    
 Chapters 11 and 12
     
Version A   Version B
Average    - 8.30
 Average    -  8.43
St. Dev.    - 2.63
 St. Dev.    -  2.47
Lowest score   -  0
 Lowest score   -   3
Highest score  - 12
 Highest score  -  12

     




 Jan 24 - 28
  Electromagnetic waves, Light, Geometric Optics        Chapters  22 and 23



 Jan 31 - Feb  4     Light, Geometric Optics, Wave nature of light      Chapter  23 and 24



 Feb   7 - 10
  Wave nature of light        Chapter 24



   Friday, Feb  11
      Exam # 2
Version A
 
Version B
 

 Chapters 21, 22 and 23
Version A
Version B
Average    -  7.16
Average    - 7.85
St. Dev.    -  3.05
St. Dev.    -  2.58
Lowest score   -   1
Lowest score   -  2  
Highest score  - 12
Highest score  - 12




 Feb 14 - 18
   Optical instruments       Chapter  25



 Feb 21
 Presidents Day




 Feb  22 - 24
  Early quantum mechanics, Models of atom       Chapter 27



  Friday, Feb 25,   Exam # 3
Version A
 
Version B
 

Chapters 24, 25
Version A
Version B
Average    - 7.02
Average    - 7.75
St. Dev.    -  1.98
St. Dev.    -  1.73
Lowest score   - 2
Lowest score   - 1
Highest score  - 9
Highest score  -  9




Feb 28 - Mar  3 Quantum mechanics of atoms
Chapter 28



 Mar  7 - 11
 Quantum mechanics of atoms, some nuclear physics        Chapter 28 and maybe 30 
     
 Thursday,  March 17
          8:30 am - 10:20 am
     Final Exam
 Version A
 
 Version B
 

     Comprehensive

  

Version A
Version B
Average    -   12.73
Average    -  12.00
St. Dev.    -     4.16
St. Dev.    -    3.82
Lowest score   -   4
Lowest score   -  6
Highest score  -  20
Highest score  -  20

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