Behavior Definition and 317 Threads

As a chemist, I'm accustomed to thinking of electrons in the wave/particle dualistic sense and their energy orbitals in terms of quantum mechanical wave equations and probabilities. But I would like some input on the following thought experiment relating to photons and the wave behavior of...

Recently, I came across some who suggested that a plasma between half the temperature of the sun (2889 K) and the temperature of the sun (5,778) would have the same burn patterns as lava. I felt skeptical about this for two reasons Lava's viscosity affects how it behaves. I did not think...

Are people more closely related to dogs or to cats? Based on behavior I would guess dogs, but what does the DNA say? What about the fossil record? Anybody know?

I'm always reading about reactions or physical phenomena having Arrhenius behavior. But I can't figure out what that means. I obviously did a search and I learned a lot about the physical chemist Arrhenius, but nothing about what the adjective named after him means.

Given present theory, how would a laser photon stream behave at a tangent point to an event horizon (EH)? Is it possible for a photon stream to orbit a black hole? Could the beam be split at the EH with one branch spiraling into the black hole while one branch follows some geodesic (perhaps not...

On http://en.wikipedia.org/wiki/Aurora_(astronomy ), about 1/2-way down the page, there is an image of, quote, "Aurora australis (September 11, 2005) as captured by NASA's IMAGE satellite, digitally overlaid onto the The Blue Marble composite image." Next to it, there is a rolling video of...

I'm not sure if I should post this in the politics part of the forum. I found in an excellent source of information claims that dolphins, penguins, frogs and birds engages in homosexual behavior. I was wondering what remains of the argument that homosexuality is against Nature, such as, for...

This analysis seems elementary but I haven't seen it anywhere: 1) In special relativity, we are amazed that a beam of light emitted by a spaceship moving at .99c and measured by either a stationary observer (relative to the space ship) or by an observer on the moving ship has velocity c...

If you take the derivative of, say, xk, you get kxk-1, a function that grows more slowly as x approaches infinity. On the other hand, if you take the derivative of xx, you get xx( ln(x) + 1), a function that grows faster than xx. In fact, if you do this experiment with most standard "nice"...

Homework Statement http://img14.imageshack.us/img14/7694/picture1yao.png second part: the voltages across the resistor and the inductor are... The answer given is always out of phase. Can someone explain why? If the it is in resonance, wouldn't the impedance be equal to the resistance...

Could someone explain to me the reason why the 3d level of Singlet Helium is lower in energy than the 3p, since it is supposed to be higher because of less penetration...? The energy diagram is here: http://hyperphysics.phy-astr.gsu.edu/hbase/quantum/helium.html#c1 Thank you!

No, they are not the NotAGoshawk. These are either Cooper's or sharp shinned hawks. I was sitting outside the other evening when a hawk swooped in and landed on a tree branch with a dead dove in his claws. He ate about 1/3 of it and left the rest on the branch, a few minutes later another...

In some discussions here about quantum effects in the macro world, ZapperZ will only admit that things like superconductivity, Bose Einstein condensates etc. are good examples. But these are just macroscpic quantum coherent phenomena. Of course, if you have a flux qubit, you can directly...

Today, my professor said something like "The series 1 + -1 + 1 + -1 and so on is defined to be one half... but let's not go into that." and then didn't feel like explaining when people asked him why. I have no idea why that would be true... It seems like a similar case might be...

The behavior of the tracetrix(need help to verify properties) :( Homework Statement Howdy Given the parametric function \beta(t) = (sin(t), cos(t) + ln(tan(t/2)) where t is the angle between the tangent vector and the y-axis and where \beta: (o,\pi) \rightarrow \mathbb{R}^2...

If you check out https://www.physicsforums.com/showthread.php?t=282332", you'll see some LaTeX strangeness. Specifically, not all the images appear, and the ones that do appear seem not to match the LaTeX source. It's almost as if the images are offset: i.e. the n-th bit of source ends up...

Homework Statement Sketch the graph of the polynomial function. Make sure your graph shows all intercepts and exhibits the proper behavior. No calculator allowed. P(x)=x(x-3)(x+2) Homework Equations P(x)=x(x-3)(x+2) The Attempt at a Solution P(x)=x(x-3)(x+2) 0(x-3)(x+2)=0...

Homework Statement Assume that resistor R has a resistance of 34.2 Ω, inductor L has an inductance of 152 mH (milli-Henry), and the battery has a voltage of 33.7 V. Also assume that the circuit elements are ideal. If the switch S is closed suddenly, the time for the current to attain a...

We had company Sunday evening and my old dog decided to do her half twist butt in the curtains routine. :redface: http://img397.imageshack.us/img397/5793/1000788jpgolddogcv4.jpg

finding the eigenvectors (and behavior of solution) around the critical points found in this thread: https://www.physicsforums.com/showthread.php?t=258349&referrerid=110346 D_{f} = \[\begin{pmatrix}32x & 18y \\ 32x & -32y\end{pmatrix}\] D_{f}(1,1) = \[\begin{pmatrix}32 & 18 \\ 32 &...

Homework Statement limit as x approaches 0 of (sin^2 (x))/x^2 Homework Equations i generally know how to solve the equation, but I'm not sure what to do about the top. is sin^2 (x) the same as sinx^2? The Attempt at a Solution

"Behavior of light accelerating" Imagine a spaceship which has got a small lightbulb standing on the floor. You turn on the lightbulb and the light shoots towards the ceiling, but before the light reaches the ceiling the spaceship accelerates a bit and stay at some velocity. My question is...

There's lots of talk about finding "a gene for aggression" or "a gene for homosexuality" etc. I'm less interested in cases where the results are clearly ambiguous like in most (if not all) human studies. Rather I'd like to know what people think we even mean when we refer to a gene as being...

Why is it that systems organize? For example, the planets orbit around the sun and the stars orbit around in their respective galaxies. Another example on a smaller scale is the atom. The electrons move about in probable clouds around the nucleus (if I got this right). Why do systems do this?

Hiya. I've gotten behind in physics lately. Disturbingly so, in fact. I just can't stand how little I know, so I've recently undertaken the task of educating myself using Wikipedia, but it's terribly hard. I may have misinterpreted some things, and some things don't make much sense at all, so...

Homework Statement I'm having trouble understanding the physics equations related to Steering Behaviors For Autonomous Characters (present in the book "Programming Game AI by example"). For those that don't know- Seek is a kind of behavior whereby an object with a given mass, current...

This is probably a complete noob question, but due to my general lack of experience in this area I wasn't able to find the answer on my own. When you want to reroute a signal on the PCB to an external location, or replace a signal with one of your own, what situations do you need to cut the...

Ok, let's say we have at our disposal a thermometer of constant volume gas. Inside it, we'll put a real gas, like Helium or Molecular Hydrogen. Ok, the gas compartment is placed inside a mixture of liquid water and ice, so we guarantee the gas inside is at 273.15 K. We measure its pressure...

I am still trying to get a handle on plasma behavior, if I had a gap intended to apply a field for the purpose of compressing a hydrogen ion stream, using the Z-pinch effect could one discharge a current through the ion stream to affect the Z-pinch? I am thinking that it would, that the...

Ok i love Mathematica... but theirs 1 ONE thing i hate about it... if i select text... and let's say i typed "1234" and i select "23", but i only wanted to select "2"... so i assume Mathematica's cursor works like every other program in the world and press [shift]+Left... my goal is to...

Does anyone has some literature or any idea about this topic?More precisely i would like to know about the local and global effects due to neative and positive curvature.Thanks!

So it's been said that the wavefunction has no physical meaning except to predict the presence of a particle at a particular space and time. Yet quanta seem to exhibit wave-like properties even in isolation (single-electron interference, for example). Further, quanta _NEVER_ exhibit...

I have a design issue. I've programmed a CPLD so that it controls whether a MIC can activate or not. There are 8 MICs. A MIC is allowed to activate if there are no opens nor shorts on its lines. Each MIC has 4 wires (red, black, white, green). The red and black wires are for the...

Repulsive interactions are an attribute of Cooper Pairs, which mean that Cooper Pairs don't behave like an ideal gas . Are these the only attributes that prevent Cooper pairs to behave like an "ideal" boson? How could we show that the two superconductors of a JJ behave just like two BEC's?

consider the function \frac{1}{\epsilon^2 + z^2} So we know that there are two poles, one at z = i \epsilon, one at z = - i \epsilon. So when this function never hits 0 on the real line, how do the singularities affect its behavior on the line? Okay, so poles are a subclass of singularities...

Hopefully this isn't a foolish question but, I am up to CalcII and am anxious to apply what I've learned but have found nature fails to provide functions for it's behaviour like textbooks do. Is there a book or something I can read to develop this skill?

So, I've noticed that when I freeze ice cubes these strange icicles appear on the top of the ice. I took a picture, included as an attachment. Not really sure how something like this forms. Please no speculation.

Don't know if this is the right place for such a question... I plotted these graphs based on data taken from the black box of a plane: http://www.planetmobile.it/jumpjack/immagini/volo93-grafici.GIF I can't fully understand these data: looks like while the plane was falling down, it was...

http://www.komotv.com/news/local/8810622.html

If there were no law requiring the use of seatbelts, would you choose not to wear one? I'm questioning the effectiveness of the seat belt law. I think that someone who is irresponsible enough to not wear a seat belt is also irresponsible enough to ignore the law requiring that they do. While...

I would appreciate some practical advice on a problem I'm having with a project I'm working on. I have implemented a simple voltage adding circuit using an op-amp. (see http://homepages.which.net/~paul.hills/Circuits/Adder/Adder.html for the generic circuit) Using one amp of a LM348...

I noticed when I stick a cylindrical magnet on a smooth metal surface (longways) and roll the magnet along the surface, it does not roll smoothly. Instead, it seems to resist movment, then 'pop' forward into another position. It is almost as if the magnet has a preference on which side sticks...

Hi all, I have attached a notebook which I am doing a calculation in. For some reason, Mathematica is acting inconsistently. When I run the calculation for the first time, it usually doesn't work. By that I mean I get the output that you can see in the notebook attached. You can that...

Homework Statement Use the Mean Value Theorem to show that: a)Suppose f is a diferentiable function on the interval a < b, and suppose f '(x) is not equal to 0 for all x Element Symbol (a,b). Show that f is one-to-one on the interval (a,b). b) Assume that |f ' (x)| < or equal to C < 1...

Here's a problem the TA made but now that I look back at it, I wonder how he did it. A system contains N weakly interacting particles, each of which can be in either one of two states of respective energies \epsilon_1 and \epsilon_2 with \epsilon_1<\epsilon_2. a) With no explicit computation...

I have been running IV tests on polypyrrole nanowires and i see a time varying resistance that is linear over 3 time periods... can somebody explain this to me?? i am basically a EE student and i need help with the this... maybe it has to do with transport in the wires or some kind of...

Hello All, I'm currently trudging through my physics class which is teaching about electric and magnetic fields, and their interactions. As I have been reading through the textbook, I have been trying to formulate ideas and understand exactly what is happening inside of current carrying...

I was separated from my extended family for many years. When I returned, I noticed similarities among the members' behavior. My mother and first cousin possesses similar beliefs in health, and a general similarity in personality. My second cousin possesses the same sleeping patterns that...

Hi, my first post to this forum: I'm curious whether the hanging mass of the fuselage beneath a helicopter rotor can be said to exhibit pendulum behavior. Specifically, in the case of a helicopter or other rotorcraft with a so-called teetering rotor, no torque is present at the rotor head...

First, I'd like to mention that these are just some random questions I thought up about waves. 1. How can you hear sound through a barrier and why is it muffled when you hear it this way? I know waves are transmitted through materials, so I guess I'm really only asking why the sound is...