# Recent content by guyguy

1. ### Astrobites analog for physics?

I have been wondering this same thing - a google search directed me to your post. I'll keep an eye and post back here if I find anything. Hopefully you can do the same. I'm also very interested in finding such a source or creating one if there is a void.
2. ### Physics Question about the different types of physicists

For actual theoretical research in time travel, you should have a look a the work of http://www.phys.uconn.edu/~mallett/main/main.htm". Also, you might enjoy his book. Again, you should be careful how you think about claims theoretical physics, because while there is sometimes nothing to say...
3. ### First Law of Thermodynamics - Correct Formulation?

Okay, gotcha! Thanks a bunch
4. ### Bell's Theorem Problem

Give this book by Blumel a look. He explains it very well, and I didn't fully understand Bell's Theorem until I gave it a look either. http://books.google.com/books?id=GOYtFsJN9dQC&lpg=PP1&dq=blumel&pg=PA182#v=onepage&q=blumel&f=false
5. ### First Law of Thermodynamics - Correct Formulation?

So, if we use the ideal gas law, and divide by V^2... \frac{P}{V} = \frac{Nk_BT}{V^2} = k So we see that, if P \propto V , the expansion cannot be isothermal; moreover there must be a specific relationship between T and V? I don't really think that makes much sense that the...
6. ### Hyperfine Splitting the same as Polarization?

I think this is just what you need: http://www.physicsclassroom.com/class/estatics/U8L1e.cfm the polarization comes from the electric dipole within the atom caused by the charge distribution
7. ### Electrostatics - spherically symmetric charge density

I agree, because the main part of the problem is inside the sphere. You can use \mathbf{E} = (1/4 \pi \epsilon_o) \int \frac{\rho}{r^3} \mathbf{r} dV and then break down the differential volume element to integrate
8. ### Hyperfine Splitting the same as Polarization?

Hey there, Hyperfine splitting is not the same as polarization. Hyperfine splitting is due to a property of quantum particles called spin. This property creates "hyperfine splitting" in the energy levels of quantum systems past the fine structure that arises due to first order relativistic...
9. ### First Law of Thermodynamics - Correct Formulation?

Okay, so that's the only difference thanks a bunch. I think my professor had mentioned that she was using a difference book for her notes than we had read. She hadn't been able to reconcile the difference by the end of class though--it just became a big mess. Regarding why P changes, I think...
10. ### Electrostatics - spherically symmetric charge density

This seems odd to me for the charge density \rho (r) = C r I don't think you can simplify to a point charge, since the potential for a point charge drops as 1/r^2 and this density says that there is more charge as you get further away from the origin. That is not the same field as a...
11. ### First Law of Thermodynamics - Correct Formulation?

Homework Statement A gas expands from 1L at 1atm to 3L. Assume P is directly proportional to V. This is a simple question from my second lecture on Thermal Physics, and I have found a way to solve it after my professor made it very confusing in class. My question is more about the...