tag:blogger.com,1999:blog-5088860151651047897.post4393274994762792502..comments2024-03-25T10:56:59.380-04:00Comments on Jacobs Physics: 2012 AP Physics B exam solutions -- my own attemptGreg Jacobshttp://www.blogger.com/profile/03854009948036330746noreply@blogger.comBlogger6125tag:blogger.com,1999:blog-5088860151651047897.post-6885188315688376812012-07-14T17:03:30.387-04:002012-07-14T17:03:30.387-04:00The second free response problem is interesting. I...The second free response problem is interesting. I didn't the math and ended up with h>H. The astroblaster experiment may prove that my answer is correct.Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-5088860151651047897.post-50274212128526982142012-05-17T08:21:32.556-04:002012-05-17T08:21:32.556-04:00Darren, you're right that I calculated through...Darren, you're right that I calculated through X. <br /><br />Anon, I'll first answer your question that I think the difficulty was dead-on normal overall. I thought that #2 was extremely tough, especially for a 10-point question. However, I thought that #7 was the easiest atomic/nuclear question in ages. Everything else was on target, so the overall difficulty was standard.<br /><br />Two caveats: (1) That's a first impression.<br /><br />More importantly, (2) IT DOESN'T MATTER to the scoring. If the free response section is harder than usual, then a lower total score will be necessary to earn each grade; similarly, an easy free response drives the scores for each grade up. <br /><br />I might sometime post a discussion of how AP score cutoffs are set.<br /><br />GCJGreg Jacobshttps://www.blogger.com/profile/03854009948036330746noreply@blogger.comtag:blogger.com,1999:blog-5088860151651047897.post-65757947994347957672012-05-17T00:08:39.334-04:002012-05-17T00:08:39.334-04:005ci asks for the current through Y, not X. Check y...5ci asks for the current through Y, not X. Check your solutions since it's not the total current anymore.Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-5088860151651047897.post-40176080699294787412012-05-17T00:04:48.125-04:002012-05-17T00:04:48.125-04:00What were your thoughts on the level of difficulty...What were your thoughts on the level of difficulty of the free response this year (relative to previous exams)?Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-5088860151651047897.post-73021299547590442472012-05-16T22:23:56.973-04:002012-05-16T22:23:56.973-04:00Of course you can! $1 million, cash or wire trans...Of course you can! $1 million, cash or wire transfer, and I'll throw in solutions to all your homework the rest of the year. When the money arrives, I'll release the file to you.<br /><br />GCJGreg Jacobshttps://www.blogger.com/profile/03854009948036330746noreply@blogger.comtag:blogger.com,1999:blog-5088860151651047897.post-24498044264624714132012-05-16T20:21:23.866-04:002012-05-16T20:21:23.866-04:00Can you release your possible solution to me? I ha...Can you release your possible solution to me? I have a huge homework assignment due tomorrow and these problems need to be solved, I have no idea how to solve them!!!<br /><br />Please let me know if I can have them!Anonymousnoreply@blogger.com