12/07 A copy of the solutions to Test 4 is now available at the Noble Library Copy Center. 12/04 A copy of the solutions to Test 3 is now available at the Noble Library Copy Center. 12/03 The book's version of Ch 28 #34 is misleading. The wording for this problem is different in the book than it is on EGrade. The second question is asked incorrectly in the book version (i.e. it is asking a different question than is asked in the EGrade version of this problem). The posted answers are for the EGrade version of the problem, with the book numbers. The question as it appears in the book basically asks, "If the aliens are unaware of special relativity, and if they simply measure two speeds and subtract them according to Galilean relativity, what will they calculate for.. (c) and (d)?"; which is not a very interesting question (the answers would be .2c and .194c). The really misleading part about the book's version is that it reads "At what velocity to the aliens SEE.... move away from the cruiser." The aliens can only measure the cruiser speed, the light speed, and the ion speed, all relative to themselves. They must calculate the speeds relative to the cruiser. The EGrade version of this problem makes much more sense. Sorry for the confusion. GBA 11/05 A copy of the solutions to Test 2 is now available at the Noble Library Copy Center. 11/03 My email is restored at 8 PM 11/03. GBA 11/03 My email is again down as of 11/03 1 PM. If you send messages during this time, they may be lost. I will post another update as soon as the email problem is fixed. GBA 10/28 My email is now restored. GBA (2 PM). 10/27 My email is down as of 10/27 1 PM. If you send messages during this time, they may be lost. I will post another update as soon as the email problem is fixed. GBA 9/26 Because one of ASU's servers was down on Friday night, many students had difficulty getting to their EGrade home page, simply because they could not get to my page. For this reason, I have made HW8 accessible to all students. You may enter your answers and submit your work. HW8 will show up in your gradebook as "Past Due", but your scores for HW8 will be given full credit nonetheless. For future reference, it is a good idea to write down the URL of your EGrade home page so that you can get to that location even if one of ASU's servers is down. To see the URL for your EGrade home page, put your cursor over the link for your recitation on my EGrade info page. The correct URL will appear on the border of your browser. HW8 will become inaccessible again Tuesday 9/28 at 5 PM. GBA 9/20 A copy of the solutions to Test 1 is now available at the Noble Library Copy Center. 09/03 Due to scheduling conflicts, my TTH office hours will move to F366, beginning next week. The MWF office hours will remain in F306. 08/31 Because some students were still having difficulty getting registered with EGrade, I have extended the deadlines for HWs 1 and 2 by two days each. Also, there are problems with the EGrade versions of two problems in HW2, CH18 #30 and CH18 #41. Please skip these two problems for the time being (i.e. only do the book versions for now). Once the EGrade versions of these problems are correct, I will give you an opportunity to submit these two problems. Thanks. GBA 08/27 The problem for returning EGrade students should now be fixed. You should now be able to log in to this year's class with the same username and password that you used last spring. 08/26 We are having a problem with the accounts of some students who purchased EGrade in Spring 2004. Hopefully, this problem will be resolved tomorrow. If you are a returning EGrade student, and if you are having difficulty registering, please be patient. For the time being, just work the book versions of the problems, and I will make sure that there is sufficient time to submit the answers for the EGrade versions once this problem is resolved. Thanks. GBA 08/24 If the bookstore is running short of those EGrade packets which are packaged separately from the book, you can buy an EGrade code online (downloadable direct from the publisher). See the bottom of our EGrade Information Page.