Recent content by NruJaC

Gentoo is as stable as you make it to be. Used to be that messing with CFLAGS was a really popular option (setting things like -03 and -funrollallloops, etc.), that may have changed. And I also was using it before the binary installer (so it took something like a week to install and get set up...

Ahhhhh, Gentoo. That was my first distribution. Trust me, it's very easy for an Arch install to be quicker than a Gentoo install, all it takes is a couple of those seductive CFLAGS here and there and you've got instabilities and performance loss everywhere. Sometimes, waiting hours for apps to...

Been using linux for something like the last 6 or 7 years. I started on Gentoo and have been moving around distributions and have tried most of them (though I somehow missed CentOS, I'll have to give that one a shot). Out of every distribution I tried, I must say, I absolutely love Arch. If you...

18. Maybe, but that's science! Someone has to propose the preposterous ideas until the one that's just shy of preposterous is found. 19. Science is usually 50+ years ahead of its applications. Only two you missed I believe Christoph.

In general, a force is conservative iff the path integral of F around some closed path is equal to 0. This is equivalent to stating that the curl of F = 0.

Basically, you need to come up with a mapping yourself. Here's a hint, create a notation such as G(n) represents the matrix with n in Z, in the first row second column. The ideal isomorphism should pop out at you now. Let me know if that helps!

I'm not sure why you're integrating from r(0) to r(1). The problem wants you to integrate from 0 to r, where r = <x,y,z>. Easiest way to accomplish this is to look at each direction of the E-field one at a time. Integrate that piece with respect to its direction. Then compare the three results...

It's much simpler than that. As soon as that switch is closed, a driving force (a voltage), is applied to the electrons in the wire. The bulb receives power as soon as the electrons RIGHT next to the bulb receive the signal (voltage change) to move forward; why does the bulb care if it gets the...

So course registration is next Wednesday for me, and I've got some choices with the classes I can take next quarter. I'm a math/physics double major, and I'm looking to go to grad school in physics (theoretical). Two of my classes are fixed: Many Particle Physics (basically a 4th quarter of...

Good question, I've been asking this of many of my professors and not getting much of an answer out of them (in both physics and math). So I'm interested in hearing what more experienced people have to say on this as well.

Oh wow, I'm retarded, I was using (n+1) rather than (n-1). Had the same thing as you other than that. Thanks so much, I couldn't have done it without your help. Arjun

Got it! I had my diagram wrong. I was connecting k and l to the ring for some reason, and by dropping that requirement, I quickly get the result you got. EDIT: My final answer came out to -\frac{GM}{2R^{3}}[2R^{2}-a^{2}(1+\frac{1}{4}sin^{2}(\theta}))]. Look right? Thanks for all your help...

Glad to hear I helped! You are very welcome. Arjun

Wait, I don't see where you got the expression for the distance. It appears that you're using a different angle phi than I am. I have phi as the horizontal angle that I plan to integrate around the ring. Am I missing some part of the geometry? Thanks, Arjun

Sure, no problem. Here's a list of moment of inertia formulas: http://en.wikipedia.org/wiki/List_of_moments_of_inertia But more importantly, you really need to take a moment to learn rotational mechanics to really understand what's going on in this problem. From the description of the problem...