Physics 360

Winter 2006

In order to view homework scores, go to

https://www.physics.byu.edu/faculty/rees/360/www/CID.PASS.N.htm

- CID is your 3-digit CID
- PASS is your 4-character password
- N is the homework number

**Interpreting the results:**

- If an numerical answer is incorrect, I usually give you an order of magnitude estimate of your error.
- If your answers are wrong by a minus sign or are exactly off by factors of 10 or 2, these are also indicated.
- If the message says "Error," this is a Maple error. See specific error messages below.

**Common Maple Errors:**

- cannot determine if this expression is true or false Usually this means that Maple cannot numerically evaluate your expression. 1) You may be using a variable in the answer that I have not defined in the worksheet. The easiest fix is to enter the numerical answer from your Maple worksheet. 2) You may have an invalid character that you accidentally cut and pasted from Maple. See if the expression looks like what you entered. If you see a square, for example, this is the likely problem.
- missing operator or ';' Your syntax is in error. You may have left out a multiplication sign. Implicit multiplication is not accepted. That is, write 'A*B', not 'A B'.
- := unexpected You probably typed in := that was not needed because it was already provided in the answer. Check the format of the answer on the submission form. If something like "P:=" appears before the text box, don't type that into the text box.
- : unexpected or ; unexpected Maple was waiting for further information when it reached the end of the line. This message occurs, for example, if your parentheses are unbalanced or if you just put a "-" in the text box.
- <char> unexpected You have a character in your string that Maple cannot interpret.
- unexpected number Did you leave out a * in your answer, as in 3.56 10^7 rather than 3.56*10^7 or 3.56e7?