ANNOUNCEMENTS
MTH 255 - Winter 2003

All chapter numbers are based on the Early Transcendentals version of the 4th edition of the text,
and must be increased by one for the Multivariable version.
For further information, click here.

3/21/03

Course grades should now be available online.

3/20/03

The finals have been graded, but grades have not yet been reported online. You may email me to find out your exam and course grade, but please do so from a campus email address, such as your ONID account. You can pick up your exam from Sam, but you may not be able to catch him until next term.

3/19/03

Below are the answers to the final; an answer key will be posted outside my office.

1. (a) 0 (b) 2+12y (c) 3

2. conservative; potential=x²sin(y) e^z+ xy+ln(z)

3. (a) conservative (b) not conservative (c) not conservative (d) conservative

4. (a) 0 (b) 0 (c) negative (d) positive

5. -32 Pi

6. (a) 8 Pi (b) 8 Pi (c) F (d) Stokes' Theorem

7. -81/2 Pi

8. 16/9

3/14/03

I will be in my office Monday morning as usual from 9:30 until 11:15, and almost certainly also beforehand, starting before 8.

3/10/03

The final is 9:30-11 AM on Tuesday 3/18 in Kidder 364 (our regular classroom).

• The final will be roughly twice as long as the midterm, and will cover material from the entire course.
• The new material emphasizes Lessons 12-15 (surface integrals and applications) in the Study Guide, as well as the related material in Lessons 9-11.
• The relevant sections in the text are §16.4-§16.9, and §15.9. Please bear in mind that the presentation in class differed somewhat from that in the text; we covered topics in class that are not in the text, and there is material in the text which we did not cover.
• You may wish to look at the review section at the end of Chapter 16. There is also a nice review in §16.10.
• You may also wish to look at Chapters 19 and 20 of the text by McCallum et al, which is on reserve, and which is an excellent source of additional practice problems. (Some of your homework comes from this book.)
• The exam is closed book, and calculators may not be used.
• You may bring 1 sheet (8½"×11"; one side; handwritten) of notes, as well as the handout from class containing the formulas for divergence and curl in spherical and cylindrical coordinates.
• Please write your exams in pencil or black ink (blue ink is OK).
• Please turn off all electronic devices, such as cell phones and alarms; this also includes personal music players.
• Both Wednesday and Friday will be devoted to review. Come prepared to ask questions!

3/3/03

You can run the software I used in today's demonstration yourself! All you need to do is click here, then follow the first link. Since it's written in Java, it *should* work on just about any computer.

2/26/03

I will be out of town 2/27-28. My office hours tomorrow (2/28) will be in Weniger 493 with Professor Manogue, who will also teach tomorrow's class.

2/24/03

Deborah Hughes Hallett, coauthor of the alternative textbook on reserve at the library, will be giving the Mathematics Department Colloquium next Friday, March 7. The talk will be about the uses and abuses of computer algebra systems in teaching mathematics; you can find more information here.

2/14/03

Here are some online resources about planimeters:

• Planimeter 1
• Planimeter 2
• Planimeter 3
• Planimeter 4

2/7/03

Below are the answers to the midterm; an answer key has been posted outside my office.

1. (a) 4 (b) 0 (c) 0 (d) 2 k

2. (a) not conservative (unless z=const) (b) conservative; potential=x³+ yz²+ x²siny cosz

3.  4

4. -6

5. 16 + 12 Pi grams

2/5/03

Tomorrow's group activity should be short; the remaining time will be available for review.

1/31/03

The midterm is 12 PM on Friday 2/7 in Kidder 364 (our regular classroom).

• The primary focus of the midterm is Lessons 7-8 (line integrals) in the Study Guide, including the necessary background material from Lessons 1.5 and 2.5 (differentials) and Lesson 6 (vector fields). Some material from Lesson 1 (parametric curves) and Lesson 3 (gradient) is also fair game.
• The relevant sections in the text are §13.1-§13.4, §14.6, and §16.1-§16.3. Please bear in mind that the presentation in class differed somewhat from that in the text; we covered topics in class that are not in the text, and there is material in the text which we did not cover.
• You may wish to look at the review sections at the end of Chapters 13, 14, and 16.
• You may also wish to look at Chapters 17 and 18 of the text by McCallum et al, which is on reserve, and which is an excellent source of additional practice problems. (Some of your homework comes from this book.)
• The exam is closed book, and calculators may not be used.
• You may bring a 3×5 index card (both sides) of handwritten notes;
• Please write your exams in pencil or black ink (blue ink is OK).
• Please turn off all electronic devices, such as cell phones and alarms; this also includes personal music players.
• Wednesday's lecture will be devoted to review. Come prepared to ask questions!

1/31/03

A short paper describing the material in today's lecture can be found here; this material is not in the text.

(I recommend not reading this paper until after the lecture.)

1/30/03

The homework originally due today is now due tomorrow at the start of lecture.

1/29/03

Homework hints:

• All curves can be expressed in terms of a single variable.
  If more than one variable is changing along the curve, there must be a relationship between them.
• "Increases like" means "is proportional to".
• Is (linear) charge density (the amount of charge per unit distance) a scalar or a vector?

1/28/03

There are now 2 vector calculus texts on reserve:

Stewart, Calculus: Early Transcendentals, 4th edition (the official textbook);

McCallum et al, Multivariable Calculus, 3rd edition (the source of some of your homework problems).

Click here for the catalog info at the Valley Library.

1/27/03

This week's homework assignment is available from the homework page as a PDF file. A copy has been posted on the bulletin board outside my office; please remove only to photocopy.

1/24/03

I will hold regular office hours this morning from 9:30-11:15 AM in my office; ignore the earlier message below which says otherwise.

1/14/03

When completing this week's homework assignment, ignore second-order terms such as dr*dphi, which are much smaller than first-order terms such as dr.

1/13/03

My office hours will be MF 9:30-11:15 AM (and other times by appointment; feel free to drop by my office to see if I am available).

I will be out of town 1/16-18 and 1/22-25. During my absence, you may contact Professor Corinne Manogue in the Department of Physics with questions about the course. She can be reached by phone at 737-1695, via email at corinne@physics.orst.edu, and in person in Weniger 493. In particular, she will cover my office hours on 1/17 and 1/24 (in her office, not mine). All classes will meet as usual during my absence.

1/12/03

Both this week's and next week's homework assignments have been posted on the homework page as PDF files. Please let me know as soon as possible if you are having difficulty downloading these files. A copy will be posted on the bulletin board outside my office; please remove only to photocopy.

1/9/03

You can use this website to determine the magnetic deviation (angle between true north and magnetic north) for any location. You will need to know the latitude and longitude -- or the zip code. (Enter a zip code, press the button labeled "Get Location", then press the button labeled "Compute".) The first number in the output, labeled D, is what you want -- positive numbers denote magnetic deviations EAST.

1/5/03

Make sure to read the note about the various editions of the text.

Make sure to read the grading policy.

Good things to review:

• Vectors (§12.2-§12.5)
• Chain Rule (§14.5)
• Double Integrals (§15.3-§15.4)
• Parametric Curves (§13.1-§13.2)
• Gradient (§14.6)

Note that the material in Lessons 1-5 (but not 1.5 & 2.5) in the Study Guide, covering §13.1-§13.4 & §14.6-§14.8, has been moved to MTH 254.