Diagram Definition and 1000 Threads

If I have a scalar field $$\alpha$$ and a Dirac particle $$\beta$$ and its anti particle $$\overline{\beta}$$ such that the three couple to give a vertex factor of $$-ik$$ when evaluating the Feynman diagram (where k is an arbitrary constant). How do I evaluate the first order diagram of...

I am doing a ER Diagram for a class and having a lot of trouble with a specific piece of the sentence. Anyway, here is the business requirements we are diagramming: The video rental company has several branches throughout the USA. The data held on each branch is the branch address made up of...

Hi all, I'm hoping for some help/guidance on this problem: 1. Homework Statement The complex number z is represented by the point P on the Argand diagram. Sketch and describe in words the locus of P if: i) ##|2-iz|=2## ii) ##|\dfrac{1+i}{z}-2|=2## The solutions read: i) ##|2-iz|=2...

Hello I’m wondering if my understanding of how different processes relate to the phase diagram here is correct. 1) If a piston cylinder assembly maintains a constant 1atm pressure on some water and the water is cooled, we would be going horizontally along the red line from 373.15K to 273.15K...

This is what I was able to get from the problem but it is clearly wrong and I have no idea what the right way to go about this would be. Thank you in advance for your help. Homework Equations : None available for this type of problem.[/B] 1/3:

Consider the lower right plot in this picture (or many similar ones). I interpret the angle of the t' axis with respect to the t axis as: From the point of view of the stationary observer, all progress in time for the moving observer will be accompanied by the latter's spatial progress (to the...

I drew a force diagram of one charge with gravity downward, electric force to the right, and tension at 20 degrees left of +y. I summed the forces in the x and y directions: Fy = Tsin20° - mg = 0 T = 0.1434 N Fx = kq^2 / r^2 - Tcos20° = 0 q = 6.29 x 10^-12 C The correct answer is...

Homework Statement I have a 5m long simply supported beam, with supports at points 0m and 5m. There's a UDL of 10kNm^-1 from 0m to 4m. It has downward forces acting at 2m (10kN) & 4m (15kN). I need to sketch a bending moment diagram to determine the position & value of the max bending...

static electricity diagram Hello! I am new here! I need your help... How would I draw a simple diagram to show how static electricity is made use of in a photocopier to position the black toner where is needed. It sounds a litte bit tricky and I think how it would looks like. Thanks in...

Hey guys I am having trouble understanding this circuit. Can someone help me get through it, and explain to me what the signal is doing form start to end please?

SOLVE THIS PROBLEM And this is the figure I need the free body diagram because the book solve this problem in this way the force normsl is n = fcosx the verticall componente is fsenx = w + miuN why does the fr is vertical in this case?

Homework Statement I'm trying to make a Nyquist diagram based on experimental data obtained of the gain and phase of a high-pass RC filter which has the transfer function: ##\frac{V_{out}}{V_{in}}=\frac{R}{R+1/(j \omega C)}=\frac{1}{1-j\omega_0/\omega}## Here are the superimposed...

Homework Statement I need to be able to draw a Sankey diagram for wave power, help? Homework Equations The Attempt at a Solution

Homework Statement At the point specified in the diagram, isn't pressure coming from all directions, namely gauge pressure. So wouldn't some of the gauge pressure be used to counteract the effects from the atmospheric pressure. Doesn't this mean the equation Ptotal = Patsurface + Pgauge is...

Homework Statement I am not sure if this goes here but I am doing research on solar panels and am confused on some of the physics in a particular scientific journal I am reading. More specifically I am having trouble with the equations on the last part of page 1 and the entire second page. I...

[SIZE="4"]Definition/Summary A free-body diagram is a diagram of all the contact and non-contact forces acting directly on a body (in a non-inertial frame, that includes "fictitious" forces). Indirect forces (such as the weight of a different body), and internal forces, should not be...

Hi all, is anyone familiar with the term 'three-line diagram'? I've been searching and googling up the wazoo, but all I've uncovered so far is that "A three-line diagram is more detailed than a one-line diagram," which is frustratingly vague. I'm guessing that this term is an alternate one for a...

Hello, as just a fun curiosity, I was pondering what the circuit diagram of a square inch of air would look like. I figured I would ask the folks here what you think it would look like... I am thinking it would have a certain amount of capacitance, and maybe a very large zener with the...

If one has a 4-fermion vertex, like in Fermi theory : ##G_f (f_1 \Gamma f_2)(l_1 \Gamma l_2)## And you are calculating a one-loop diagram where you have the diagram of : f1-> f2,l1,l2 -> f1 (used for dispersive/unitarity approach) Where in the end you'll use Cutkosky rules to calculate...

Hi, I'm not from Software Engineering background and I'm trying to learn State Machine Diagrams on my own by looking at resources on the internet. I'm trying to come up with a State Machine Diagram for a telephone but I can't seem to find an answer on the internet. Can you help me by telling...

Hello, I am doing research and I was told that I need to create an O-C diagram for an eclipsing binary. Unfortunately, I haven't been given too much instruction on how to do this. Right now, all I have are minimum times of light, the period of the system, and cycle numbers. I know that O-C is...

Homework Statement A 5.0kg mass is suspended from the ceiling. A horizontal force F is applied to hold the string in position as shown http://i.imgur.com/ZdR72ff.jpg Determine the reading of F on the spring balance by using a scale diagram Homework Equations None The Attempt at...

Homework Statement Find the shear and bending moment diagram for a fully restrained beam with a length of 5m, a uniform distributed load of 1kN/m from x=0 to 2m, a point load of 1kN at 2m, and another uniform distributed load of .9kN/m from x=2, to x=5. Homework Equations The...

Homework Statement As per attachment. Part iii How would you do this question by integrating the work? Homework Equations W = - ∫P dV PV^gamma = constant The Attempt at a Solution So I integrated the work with P= constant/ V^gamma and came up with this: W = constant* (...

Hi, I perform my post-processing and analysis of data from silvaco in MATLAB and would like to export values from the .str file to a file that can be read easily into matlab. Does anyone know of a way to do this programmatically? I can do it in tonyplot, but I've got everything else scripted...

In the bottom left, why does the BM diagram start at -4kNm rather than 4kNm? I understand that if you make a cut you yield this result but if you don't make a cut how would you know whether it starts at -4kNm or 4kNm? Thanks

Homework Statement Find the locus of points which satisfy 2π*|z −1| = Arg(z − 1) where |z −1| ≤ 2. Homework Equations n/a The Attempt at a Solution I know that |z-1| ≤ 2 is the 'inside' bits of a circle center (1,0) with a radius 2 After that I get confused surely with |z-1|≤2 then...

For the circuit shown below, determine i) The voltage (V) at points Y and Z. ii) The current through each resistor. For (i) do I have to split into series and parallel?

Homework Statement For the circuit shown below, determine i) The voltage (V) at points Y and Z. ii) The current through each resistor. Homework Equations V=IR, I=V/R, R=V/I The Attempt at a Solution For (i) do I have to split into series and parallel?

Hey guys i done every thing and i just wan to know how to draw the acceleration diagram, thanks. Homework Statement Θ=30° velocity of b=0.9m/s radius =0.15m Homework Equations The Attempt at a Solution in the attachment question 3

Hello, If you visit this link (http://maia.ice.cat/cosmocomp/bcn_workshop/woodward.pdf ) you will see in page 3 a light-cone diagram! How is it possible to generate it in GNUPLOT? Note: i have a "data.file" with points and the columms are: 1) z (redshift) 2)Right ascension (RA)...

How do we interept what is going on in the block diagram? We have u going in and being added or subtracted from noise but we arent giving the plus and minus to determine which it is. Then there is a branch off u going straight to the Kalman filter. Then y comes from the plant and is added or...

HELLO everyone.. i have read some journals and some researchers (not all but most of them) said that bismuth manganate MUST be synthesized in high pressure conditions. in other words, not in room temperature/pressure. it that true? because some of researchers also synthesized that BiMnO3 in...

Homework Statement Need to design a system where the lamp (output) turns on when sound is heard and turns off after 10 seconds of no sound, but it must also be dark (light sensor).Homework Equations The Attempt at a Solution I have put a Light Sensor (that is set to let current flow when it is...

Hey guy, I would like to ask a few question about force and free body diagram. First question, I conduct a compressive experiment a few day back, using compression machine to test the strength of different materials e.g., Aluminium, PVC and Ceramic. However there is one thing that I don't...

…or must it be of displacement, x? In a shear force, V (or bending moment, M) diagram, isn't it usually the shear force (or bending moment) plotted as a function of displacement, x? When someone asks to "draw the shear force and bending moment diagrams as a function of the applied load...

Homework Statement Sketch the energy diagram for a system with l = 2 and s = 1/2: before spin-orbit splitting, after spin-orbit splitting, after additional application of external magnetic B (label all m values). Homework Equations m values from -l to l (total 2l+1 values) j values...

Homework Statement http://postimg.org/image/vnn9m9au9/ For the car why is the friction acting towards the left. Shouldn't it be towards the right since the car is moving to the left And why is there no friction for the trailer? Homework Equations The Attempt at a Solution

Homework Statement a) What is the length, rmr_m, of the moment arm of the force F→F_vec about point p? b) Find the torque τtau about p due to F→F_vec. Your answer should correctly express both the magnitude and sign of τ.The Attempt at a Solutiona) I'm inclined to state the answer as -rsinΘ...

Hello all you physics folks, this is my first post, so if I screw this up, go easy on me :) Here's the problem I'm working on and that I simply can't get my head wrapped around: I have a table of 10 values of counts per second (cps) of alpha decay of Americium-241, depending on the...

I am having a difficult time understanding how they're transforming this capacitor schematic...what exactly is going on here? The example states that each cap is 7pF and the final answer C(eq) = 4.308pF...but why?

Hi, I was just trying to draw a Feynman diagram for ψ' to χ_{c} states. So we have a electromagnetic transition. I feel tempted to just have c and \bar{c} coming in and letting a γ leave from one of the legs. But that looks like an incomplete Feynman diagram to me. Maybe I have to get two...

Hi, I've been reading about Feynman diagrams lately and I'm trying to understand the pair annihilation diagram. The picture's here: http://en.wikipedia.org/wiki/File:Feynman_EP_Annihilation.svg I don't understand the following things about the diagram: 1. Why anti-patricles have to...

So I wanted to create an enthalpy-concentration diagram generator in Excel using Dalton's Law and Raoult's Law (ideal stuff). The problem is with the formulation. I studied and used this .pdf file form a university in HK: http://ihome.ust.hk/~kexhu/ceng3210/221-05.pdf Seeing as it also agrees...

Homework Statement A person pushes perpendicularly on a block of wood that has been placed against a wall. Draw a free body diagram and identify the reaction forces to all the forces on the block. 2. The attempt at a solution I'm not exactly sure if I've covered all the forces or if I'm...

Hi, I am designing a system to run a certain sequence when the control input is off, and then run a different sequence when the control input is on. When drawing a state diagram, for the loop where the control input is on, can the system repeat the same state twice throughout its sequence and...

Homework Statement http://postimg.org/image/5h0hvdi4l/ Can someone explain why the FBD of Block C would involve three cord tensions? Homework Equations The Attempt at a Solution

Homework Statement Draw the shear diagram for the compound supported beam. Homework Equations Statics... so sum of moments at any point or forces in any direction are 0 The Attempt at a Solution I summed the forces in the y direction, as well as the moments at A and moments at B...

Homework Statement Attached, where AC=BC=2R and CD=CE=3R. I need to work out the force the cylinder exerts on the cross section (in order to work out the moment at C). So first I'm trying to work out the free body diagrams for this system. Is it as I've attached? How do I draw the tension...

Here's the question: The following figure is the H-R diagram of a star cluster. Use this diagram to determine the age of the cluster. The answers are multiple choice: (A) 600 thousand years (B) 6 million years (C) 60 million years (D) 600 million years (E) 6 billion years...