Recent content by dtl42

1. 3 math classes in one semester- too much?

I'm taking partial differential equations, modern algebra, and Fourier analysis this semester. It's definitely doable if you prioritize.
2. Physics REUs for 2011

I also got into PPPL NUF, but I haven't been matched with a site yet.
3. This might be serious

Don't even do that (elfboy's suggestion), just do lots of practice with computational stuff.
4. REUs for current sophomores (and other summer stuff)

I think between 5 and 10 is good. The recs shouldn't be too bad, likely very repetitive, so it wouldn't be too much more work than doing a single one. Last year, I only applied to 3 things and got lucky, I guess. I'm planning on around 5 apps this year. What subjects are you interested in?
5. REUs for current sophomores (and other summer stuff)

I'm also a rising junior. I was able to snag an REU last summer, as a rising sophomore, so I think you're chances should be fine. It's certainly a bit random, but cast a wide net. You could tutor over the summer, get your own hours, and you'd still be doing something related to physics/math...
6. UChicago or Columbia

So, I've got 5ish days to decide which of these institutions (UChicago, Columbia) to attend next year. At UChicago, I'd like to double major in Physics and Economics. At Columbia, I am accepted at the engineering school and I would major in Applied Physics and minor in Economics. The main...
7. Fnet=ma 2008 #15

Homework Statement A uniform round tabletop of diameter 4.0 m and mass 50.0 kg rests on massless, evenly spaced legs of length 1.0 m and spacing 3.0 m. A carpenter sits on the edge of the table. What is the maximum mass of the carpenter such that the table remains upright? Assume that the force...
8. Fnet=ma 2008 #14

Thanks, I get it now.
9. Fnet=ma 2008 #14

Homework Statement A spaceborne energy storage device consists of two equal masses connected by a tether and rotating about their center of mass. Additional energy is stored by reeling in the tether; no external forces are applied. Initially the device has kinetic energy E and rotates at...
10. Green's Theorem well, sort of.

I forgot a factor of 1/8 that should be in the second expression when I factored, thanks for the help!
11. Green's Theorem well, sort of.

I realized my mistake, I had been thinking that I needed to get positive 32/15, but it all depends on the direction of the curve, which in my case was clockwise, and is usually taken to be counterclockwise. Is that correct?
12. Green's Theorem well, sort of.

Yes, that's what I had, but I factored it just a little bit in the above expression.
13. Green's Theorem well, sort of.

Homework Statement Evaluate \displaystyle \int_C y^2dx + x^2dy for the path C: the boundary of the region lying between the graphs of \displaystyle y=x and \displaystyle y=\frac{x^2}{4}. Homework Equations The catch is that you can't use Green's Theorem. The Attempt at a Solution...
14. Polar Double Integral

Hmm, to check it, I plugged both expressions into my calculator and they're spitting out different numbers. The rectangular one gives me around 28.4 and the polar one gives me around 10.6.
15. Polar Double Integral

Wow, I'm sorry for that typo. That would change things. Would the correct limits for r be \frac{1}{cos(\theta)}\text{and}\frac{2}{cos(\theta)}?