SO, i just had my physics midterm. I knew how to do everything. Except these 3 problems cause me so much headache. I was so sure i was doing everything cxorrectly, but the numbers never came out that matched the choices. those 3 problems were worth 5 points each, i ended up getting them all wrong and getting 85/100 Well, take a look http://courses.washington.edu/p121ca07/Exams/Exam1/Exam1_Solutions.htm [Broken] it was problems 11-13. Now, the diagram it shows the angle is 30 degrees. But, in the solutions, it says the angle is 2pi/9 radians, which is 40 degrees. What a load of bullcrap. No wonder i kept getting the wrong numbers. Either the writers of the test used the wrong angle in making the solutions, or whoever put the digram there put the wrong angle. And this is a friggin university. hOW CAN They make a mistake like that? WHAT WERE THEY THINKING? but i believe i deserve all those points back. I should have gotten 100%.