Picture Definition and 416 Threads

I don't know any better place to put this one. I am looking for DVD recorder for tv programs. Problems is I need to find one that still have composite video and stereo output to drive the tv even when the power is off. I have a few that work this way and I am trying to buy more of the same...

whats a good way to picture the vector potental A in terms of B & like what exactly is A & how does it even exist outside a torus where B & etc =0 for example its easy to see the electric potential uses the electric field E like E*ds & its quite obvious, wheras how does A not even contain...

How many nails are in the picture? How did you arrive at this solution?

Its the attached picture. I'm not seeing why when using the dot product, they start using sin.

Hi, I recall some years ago seeing a composite picture of what our galaxy would look like from outside the galaxy, for example from Andromeda but was not able to find one or even how to search for it on the web. I was wondering if anyone here is familiar with it and perhaps even if we've...

Here's the Cassini image from Saturn. Suppose I map an x-y coordinate system on that picture with the Earth (that pale blue dot down there) at the origin. Without looking at anything else, can you place points at the perimeter of the square picture, giving the angle pointing to where the sun...

Homework Statement Homework Equations KCL The Attempt at a Solution See picture. I got ix=i1. And I am stuck. Would someone please help me? Many thanks in advance.

"As we all know..." (Uh-Oh...), Bohr and those Wacky Copenhageners were adamantly against trying to form "Pictures" of the emerging Quantum theory. Bohr berated Schrodinger (Who had tuberculosis!) while S was suffering in bed at the Institute, harassing S for hours - "Get rid of the pictures!"...

I honestly don't remember the teacher teaching this but I need help with. I attached image of #8, and #9Only those 2^

What sort of field would be generated from this type of coil layout?? This isn't homework, just a general inquiry. (see picture)

Homework Statement so.. I'm taking a electrotechnical engeneering at university and now I'm talking a lot about telecomunitactions and i find myself working with Fourier transforms and laplace transforms, and majorly, the e^(jx)... and this last one shakes up my concept of the usual number...

I am wondering whether there is a possibility to somehow intuitively explain how does that happen that gauge field acquires mass after spontaneous symmetry breaking? I mean something visualizable, not just referring to Lagrangian and the algebra. I would suspect it might be possible at least for...

These days have been full of news of the Planck Telescope. The most popular is the actualization of the CMB picture (the ellipse with dots red and blue). I know the idea of it. Each dot represents the "temperature" in some direction (from the earth) in some sort of (θ;ψ) chart -0≤(θ;ψ)≤2\pi ...

The path of an electron in a magnetron is shown along with the electric field, see below. Assume the electric field shown is maximum at time t. Without calculation can you argue and approximate where along the electron path is the most likely positions of the electron at time t? Picture in...

"Picture" of electro-magnetic vector potential in 1+1 dimension spacetime? I'm trying to model the electro-magnetic vector potential, does the following come close for 1 + 1 dimension spacetime? See sketches below. Consider an elastic string, under tension, between two fixed points A and B...

Camera help -- Win7 HomePremiume and picture uploads I have the Canon SD 1000 Camara and Win7 Home Premiume on my Desktop. When I plug the Camara in a windo opens asking me what do I want to do and I click Import Pictures and it works. On my Laptop I am running Win7 HomePremiume the same...

This picture is on a blank piece of paper but is rendered 2in below the margin. Why is this happening? I want it to be at the top of page right below the margin. The $z$ node is causing the problem. If I remove the $z$ node, the picture moves back to the top. What can I do about this...

Homework Statement A (rectangular homogeneous) picture is hung with a nail on the wall from a twine. Neglecting the friction of the twine with the nail and that of the wall with the picture, a.-Could there exist equilibrium in other positions than the one where the picture is hanging...

Hello, It's my first time here on this forum and if my English is bad, than I at least hope I have chosen the right topic. Well, let me describe my problem: Imagine a .jpg with a balloon. What I have to do is determine a volume of it in the moment before it blows up. So in reality I have a...

Consider the S-matrix: <f|U(t,-t)|i> When going into the interaction picture, this becomes: <f_I|U_I(t,-t)|i_I> where the propagator is the interaction picture propagator, and the states are interaction states. Can you say that: <f_I|U_I(t,-t)|i_I>= <f|U_I(t,-t)|i> ? It...

Homework Statement This isn't really a homework probelm, I'm trying to answer some questions about a picture to use in my final paper for physics. I thought it would be a fun thing to have thrown in there but I can't seem to figure out how to start...

Homework Statement I need to analyze these pictures for my homework and find out the curl of the vector field at the point (red) on the picture. Homework Equations http://i1242.photobucket.com/albums/gg525/sjrrkb/ScreenShot2012-11-26at61615PM.png The Attempt at a Solution basically...

Disclaimer: Even though this problem originates from a project I was given in a math class, it doesn't really follow the format of any homework assignment and is really much more about general math question. In my math class I was given a project to draw an image with parametric equations. I...

In several textbooks of QM I have read that Lorentz invariance is manifest in Heisnberg picture. How can we deduce that?

The picture in the addition, you see one integral equation and I have moved forward to solve it but when I tried to use patial integrant ( uv-∫v.du) I couldn't go further, Is there anyone to help me solving that equation.Actually, I stuck while putting the boundries (from 0 to ∞ ) because it...

Homework Statement can you judge the diagram I want to make sure i have the forces being exerted in the correct order. Homework Equations The Attempt at a Solution

Homework Statement Two balls, one with charge Q1 = +Q and the other with charge Q2 = +2Q, are held fixed at a separation d = 3R as shown. See picture. Another ball with (non-zero) charge Q3 is introduced in between Q1 and Q2 at a distance = R from Q1. See right below first...

The following was given as an intuitive explanation of understanding why a sphere's area is four times the area of the flat circle sharing a perimeter with a greater circle on the sphere. I don't understand spatially how the cylinder and sphere are oriented. Please help. Let Z be a cylinder...

Homework Statement 5. There are two charges in space. In which region of the line connecting these two charges can we find a point of zero electric field? Homework Equations None. The Attempt at a Solution I know this isn't even that hard. I was thinking it was somewhere in...

Hi folks :smile: I am thinking that there are plenty of people here that have these and was hoping for some input. I bought a 46" Insignia (Best Buy's own brand), 60 HZ, 1080p, LCD television. I got it on sale at Best Buy for $399 and it had fairly decent reviews (average of 4.3 stars out...

Homework Statement If you calculate W, the amount of work it took to assemble this charge configuration if the point charges were initially infinitely far apart, you will find that the contribution for each charge is proportional to kq^2/L. In the space provided, enter the numeric value that...

I'm a biology dilettante who is trying to get a correct picture of the cell. From this web page http://www.arcfn.com/2011/07/cells-are-very-fast-and-crowded-places.html one gets a very chaotic impression. Small molecules are racing around with 250 miles per hour. Ken Shirrif: "In addition, a...

I was reading the wikipedia page on laser light, and on a linked article, I saw this image: http://upload.wikimedia.org/wikipedia/commons/b/b0/Flickr_-_Israel_Defense_Forces_-_Nachal_Brigade_Reconnaissance_Battalion_in_%22Commando%22_Training_%282%29.jpg What is causing those red specks to...

I have two circles with the same radius and I want to calculate the points of tangency. For example, in the picture below, I want to calculate (x3,y3) and (x4,y4). I have the radius and the distance between the two circles as shown below:

The single most common obstacle to understanding cosmology is probably the picture of expansion as an explosion outwards into empty space from some central point. It's a mistaken picture instilled in the public mind by popular media channels and reinforced by time-honored slang: the misleading...

Im sorry, I accidently edited my opening post instead of posting a new one.. The question was regarding the statement that the state ket is stationary in the Heisenberg picture when the basis kets are transforming in time. Because the state ket is a superposition of the base kets it should the...

Homework Statement Homework Equations The Attempt at a Solution So angle 1 was giving and through that they found angle 2. I need help on how they found angle 2. The dark red arrow is a vector. This is a physics problem asking for something else but I got stuck here lol. Homework Statement...

I've been dabbling with linear algebra lately and on the MIT OCW course for linear algebra, the professor talks about a column representation of a system of linear equations. For example, you teaches you to represent a 2x + 3y = 4 5x + 7y = 9 as a x [\stackrel{2}{5}] + y...

Homework Statement LOOK AT NUMBER 1. Homework Equations The Attempt at a Solution Dont know where to begin...

Homework Statement I want to include a .jpg picture in my report and got struck here form two days. I tried in the following way and i included all headers like graphicxs so on. Homework Equations \par \begin{figure}[h] \centering...

That is, conscious decisions are said to be regulated by the prefrontal cortex, whereas inherited reactions (fear of snakes, etc.) are more regulated by the hypothalamus and the amygdala. (Yes, I am aware that this is something of a simplification, but this is valid enough for my question, I...

I would like to find out how popular is Heisenberg picture. Is there someone who finds Heisenberg picture useful? And as well - are there any ideas how photon double-slit should be treated in Heisenberg picture?

Hi, I can't find any picture of a two-torus T² in the net after much searching. Does anyone have a link or can draw what it looks like? Thanks.

(This may sound like home work but it's not) What does it mean to display a picture in its frequency domain? A solid square box becomes a star shape? SHORT VERSION As title thanks. Firstly, what does it mean to show a picture in its frequency domain? and secondly, how do you do it...

Hello all, The standard meter was said to be the distance between two scratches on a platinum iridium bar. http://en.wikipedia.org/wiki/Metre Where are these scratches? I only see the bar.

Homework Statement To make it easier on the people who will try to help me, I've scanned the problem: We are interested in finding the following variables: Angles a and c The tension between A and B (TAB) Homework Equations The pulley is a "perfect pulley" no friction The system...

Hello, The time-derivative of an operator A(t) = U^\dagger a(t)U in the heizenberg picture is given by: \frac{dA(t)}{dt} = \frac{i}{\hbar} [H,A(t)] + U^\dagger(\frac{da(t)}{dt})U Now, I know that under some conditions, we can write: \frac{dA(t)}{dt} = \frac{i}{\hbar} U^\dagger[H,a(t)]U +...

This idea is based on the metaphor: Line->Paragraph->Book->Bookshelf->Library It is an idea that several small things make up something bigger. From just the metaphor above what could it be used to represent. For me I have: (1) 1D->2D->3D->4D->5D? (2) Visual->measurement->observed...

Homework Statement I've encountered problems like this: A bullet with velocity v strikes a stick (intially at rest) at a distance d from the center of mass, then the bullet sticks to it, and the bullet-stick system rotates about the center of mass. But they ask me to find weird things like the...

Consider the equilibrium situation on the picture attached. The wire supports a rod attached to an axle in the wall and the mass is suspended at about half the length from the point where the where the wire is attached (the exact position is unimportant for my point). We neglect friction from...