This assignment is due before 9 AM, Friday, September 22^nd, 2000.

• Puzzle solutions are due by 9:00 AM on Friday of each week.
• Puzzles are worth 5 points of extra credit each.
• Answers must be accompanied by valid reasoning. Just like the tests, the answer alone isn't enough!
• Each week, the first student to submit a correct answer will recieve the stylish 251 T-shirt.
• Previous winners get a "virtual t-shirt." No shirt, but a chance to win a prize with actual value at the end of the semester (often a book, or maybe software).
• Please enter your solution in the text area at the bottom of this page. DON'T FORGET TO GIVE YOUR NAME!

Consider the figure above. The blue balls are located at (-1,1,0) and (1,-1,0) each carry a charge, Q. The green balls are located at (1,1,0) and (-1,-1,0). They each carry a charge -Q. There are three points marked in red, O is the origin, P1 is (0,0,2) and P2 is (2,0,0). There are no charges at these points. I would like to rank the points O, P1, and P2 in order of decreasing electric field strength. The correct answer is:

1. P1>P2>O
2. O>P1>P2
3. P1>O>P2
4. O>P2>P1
5. O>P2=P1
6. P2>P1=O
7. P2>P1>O
8. P1=P2>O
9. The fields are all equal
10. None of the above

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