Recent content by Jenga

Au contraire -- his parents pay for lots of tutors.

Seagate's new perpendicular recording technology stores data in dipoles pointed normal to the surface in order to increase platter density. I believe they currently sell a 160gb notebook drive using this, and expect to increase that significantly in the future. They believe it will allow < 1"...

And in case you haven't checked it out already, there's also the accompanying http://ocw.mit.edu/OcwWeb/Mathematics/18-06Spring-2005/CourseHome/index.htm". The video lectures on the page are pretty good, although you may want to download the full ~100 mb file to reduce stuttering if your...

My only concern with taking linear or diffeqs is that I already have a fair amount of experience with both of those subjects. Will a rigorous treatment of linear really be that revealing? Will a full-blown proof of the existence theorem give me insight into diffeqs? I've been told by the...

Regarding upper division math courses, I was hoping I could get some advice from you guys as to what I should take. This spring, I have room for one and only one of these classes: Complex Analysis A study of complex valued functions: Cauchy’s Theorem and residue theorem, Laurent series, and...

What's wrong here is the laptop current figure. 20A for the 120V mains seems reasonable for the fuse, but a laptop will not draw ~500w. That is completely crazy. It might draw 5A from the power supply at 12V, the power supply is not drawing 5A from 120V to get that. Probably more like <1A...

Huh, this is new to me. Since when is there any use of a "practical" name for anything higher than the 3rd derivative of position? Sure they can be useful, but why bother assigning misleading nomenclature?

racprops, I think I know what the problem with your conception of this device is. You say your alternator is 110 watts or something. Assume that 20 watts is needed to deal with spark plugs and other car-running needs. Then, by your logic, there are 90 watts just sitting there in a sense. But...

Indeed. I hope most of the tough parts are left "as an exercise for the reader" :)

Speaking of griffiths - if anyone comes up with a stumper nobody here can solve, he's my current physics prof, and I talk to him on a daily basis. You wouldn't believe how much his writing sounds like his talking :)