Recent content by PRodQuanta

I'm so sad I read this forum post...

Not necessarily. In general, materials with FCC or HCP have a high ionic or metallic character, since they are close packed. That is, since ionic and metallic bonding is isotropic in nature, the atoms don't care as much about relative orientation and just fill space the most efficiently as...

I know I'm a little late and you don't care about the answer, but someone else may someday. Basically, strain is a dimensionless variable (units of distance/distance). Thus, it doesn't matter how long your sample is, only the ratio of how much the sample elongated (final length - initial length)...

I'm still not sure what exactly it is you are trying to do, but if you are trying to synthesize piezoelectric nanofibers, you must understand the mechanism for piezoelectricity. All piezoelectric materials' space group lacks a center of symmetry. So, if you try to synthesize a polycrystalline...

Yo mama's so fat, her thighs Generate an symmetry operation on a transformation of spacetime that doesn't result in a physical observable... -PR

I am not sure what you mean? Ultimately, piezoelectric materials arise from the symmetry of a crystals point group, which is a property of its bonding. A piezoelectric material generates an electric field upon being stressed, or vice-a-versa. http://en.wikipedia.org/wiki/Piezoelectricity...

I agree with HallsofIvy. I think you have it backwards. In fact, I am sure you have heard of electron microscopes and electron beam lithography. These machines exist for this very reason: electrons have a shorter wavelength than light (they give more resolution than optical microscopes and...

This is a great question, and one that I believe deserves more thought than is often given! However, this question is almost impossible to answer. If you have ever been introduced to physics, you have probably been exposed to all sorts of equations and formula which, of course, are all math...

I'm a senior undergrad student and I am going to give a 50 minute lecture on Degenerate Fermi Gases to the Thermodynamics and Statistical Mechanics class. I was wondering if anybody could help me out with coming up with some interesting stories, factoids, thought experiments, history lessons...

I have 1 more year as an undergraduate physics major. I've been looking for programs that are really a mixture of physics and something else (say engineering of medicine, but mostly physics). I've found some really good programs. These programs are titled Applied Science and Medical Engineering...

This is my first post in a while... to say the least. I joined PF about 6 years ago, and initially tried posting as many times as possible. However, I just came across this post through an email and was astonished on how similar G01s story and feelings are to mine. I was a sophomore in hs when I...

Yeah, I don't understand how one could do mechanics or the other physics classes without having taken linear algebra and diff. eq.

If he/she graduated fairly recently, you could try the http://www.archive.org/index.php" . Paden Roder

The ball is not accelerating/moving up or down in the example. Thus, the y-hat component of force must = 0. Thus, the y-hat component of tension must equal mg. Thus, the tension vector must be at some angle up and to the left. You are a little off here. Think about why the ball is not...

Verse One:I like your little sexy style love the way you gettin wild girl in the club with me girl you need to be in magazines with a crown on your head cause yous a ghetto queen like bling, bling, bling the way you shakin that sexy (ow) body shaped like an hour glass can we spend some...