Diagrams Definition and 659 Threads

Trying to do my first Physics home work assignment for college and I'm not really making any headway. He went thru the martial so fast while throwing in calculus that I'm not sure if I do or don't need. My main problem with Motion Diagrams is I'm not sure how accurate I'm supposed to be and...

In the drawing is described a system to the control flow of a liquid. The control is done by changing the rotary speed of the electrical engine that moves the pump. Changing of the speed is done by changing the voltage for the motor.BUILD A BLOCK...

Hey! I'm trying to understand time dilation in terms of minkowski diagrams. Below I've added a diagram showing the two coordinate systems where the primed one moves relative to the unprimed one with a speed v. http://mindseye.no/wp-content/uploads/2012/01/time1.png My reasoning in this...

partial orders :hasse diagrams theorem : if [A,R] is poset and A is finite , then A has both a maximal and a minimal element A={a1,a2,a3...an} but i know prove it is maximal , but i not know how i prove it is minimal ? please answer ?

Why are some lines on a PV digram curved and some lines are straight?

I have this question: "What micro-structural features of metal alloys can be studied by using equilibrium diagrams and how? Can the equilibrium diagrams be used for some other purposes? What are the limitations?" I think that only the composition of micro-structure can be predicted in a...

Homework Statement 1. A truck is pulling a car on a horizontal highway using a horizontal rope. The car is in neutral gear, so we can assume that there is no appreciable friction between its tires and the highway. As the truck is accelerating to highway speeds, draw a free-body diagram of...

Homework Statement Suppose a monatomic ideal gas is changed from state A to state D by one of the processes shown on the PV diagram. (Let V1 = 4.80 L and P1 = 3.30 atm.) (a) Find the total work done on the gas if it follows the constant pressure path A−E followed by the constant...

Homework Statement Construct the slope and deflection diagrams. I've attached the problem with the original diagram (problem #1). The Attempt at a Solution Considering the number of diagrams required, I thought it would be best to attach a photo of my work. I drew the shear and moment...

(Go on easy on me, this is my first attempt and first course at control engineering) Homework Statement In systems who has a huge consumption of hot water, such as food factories, chemical industries or hospitals, it's customary to heat the water through fuel type "mazut". the hot water...

PV diagrams for heat engines are "legitimate"? Hello forum Since my student days i was wondering about how is it possible to represent the cycle of the gas in a heat engine (e.g. otto cycle) in a PV or whatever diagram when it is obvious that the gas is not in equilibrium during the process...

Figured it out.

Folks, I was checking to see was it possible to determine the bending moment diagram from the shear force diagram. Seemingly one can do it for simply supported beams but if we consider a rigidly supported beam on either end its not possible to derive the bending moment diagram from the shear...

HI every one,i m confused between three line,single line and ladder circuit diagrams.Plz tell brief discription about them.

Homework Statement This would be really difficult to type, so I've attached the given problem and my work. I think it is legible for the most part, but let me know if you have problems reading something. The Attempt at a Solution My shear diagram worked nicely. I've run into a problem...

Homework Statement For each of the following equations sketch the bifurcation diagram, determine type of bifurcation, and find the critical value of r. ẋ = rx + cosh(x) ẋ = x(r - sinh(x)) ẋ = rx - xe-x2 The attempt at a solution Fixed points satisfy f'(x) = r + sinh(x) = 0 ⇒ x* =...

If you take a look at the attachment that I have posted, you will see 4 wave diagrams labeled A, B, C, D, respectively. My objective to is to answer the questions after the A-D diagrams. The first one is a AND logic gate with A and B. So how would I combine A and B. Do I draw only the highs of...

Hi, what do you think are the most important Feynman diagrams (or probably better: what do you think are the most important processes in particle physics)? Thanks, Quantum Cosmo

Homework Statement I need to create N-, M-, V- and T- diagrams for a frame beam. (see picture attached) The beam is 1m. The force on top is 1200N. Homework Equations /The Attempt at a Solution I started with the shear diagram. But i was having difficulties with the two normal-forces on the...

Homework Statement This cantilever confuses me so much. The negative point loads and negative distributed load. And is the other one that's -40kN/m moment/torque or something. My question is how do I do the shear force and bending moment diagrams of this. Am i suppose to redraw the diagram...

Two moles of an ideal gas are heated at constant pressure from a temperature of 29C to 110C. calculate the work done by the gas So work is the area under the PV curve, the only problem is I have no volume or intital pressure so PV=nRT doesn't help. Then I was thinking about Q= delta U -W...

I am reading Srednicki's Quantum Field Theory recently. I have thought over the descriptions of the Feynman Diagrams on his book in chapter 9, but I still can not understand what these diagrams mean and how do they help us to calculate the right-hand side of the equation 9.11 on the book. Is...

http://www.mathsisfun.com/geometry/" http://www.mathsisfun.com/algebra/trigonometry-index.html"

I've got a few diagrams (on the twin paradox), that I'd like to repost occasionally. It seems that if I just post a link, people are less likely to look at them. PF, however, complains that I've already uploaded the file. I can tweak it a bit, and re-upload it, but that seems anti-social...

Where can one find a general and detailed exposition of Penrose diagrams? What I have seen so far, in the books, are relatively brief general comments and a couple of specific examples. Usually Minkowski and Schwarzschild metrics, sometimes one or two more.

I passed my statics course and am currently taking material stength course. The thing that has been on my head is the fact that, although I know how to do shear and bending moment diagrams... I do not know how to READ them. In other words, the diagrams don't mean anything to me. For...

I'm reading QED. At first I thought I understood Feynman diagrams, but due to ones like these I'm not so sure anymore. In either of these diagrams, the photon "curves" around in space time. Why would it travel in anything BUT a straight line if nothing is influencing it? I liked to picture these...

Hey there, this isn't a homework / coursework question so I didn't think it should be posted in that section. I can't seem to find a source which explicitly tells you how to determine which bosons are used in reactions. I understand how to work out if a reaction is legal or not by using charge...

Hello.I have done all the parts and just have problems with the last one. I've pasted the whole question though to include all the details which may be needed Homework Statement The complex number −2 + i is denoted by u. (i) Given that u is a root of the equation x3 − 11x − k = 0, where...

Just a check here... I'm doing some ray diagram practice for optics and I've hit a road block. Hyperphysics is stating that for a concave mirror o is usually negative due to it measured against the direction of light propagation when applied to the mirror equation (below)...

Consider the penrose diagram for anti de sitter spacetime. It looks like the picture at the bottom of this wikipedia page: http://en.wikipedia.org/wiki/Anti_de_Sitter_space but sandwiched down I guess. Anyway, the bit I've just been reading claims that \mathcal{I} (null and spacelike) infinity...

Hi, So I'm a phd student of physics, but my research overlaps a little with inorganic chemistry, specifically transition metal oxides and spectroscopies of them. I can glean some information MO diagrams and find them quite useful when writing about what I'm doing... however it's difficult to...

Dear All I am having problems with how to draw band diagrams with band bending for Schottky Barriers and PN junctions. My issue is that I don't know how you determine which Fermi level remains fixed at its equilibrium level and which Fermi level moves to align with it when the two materials...

I was reading about those in my textbook and they drew an example of a block resting on a ramp. The diagram showed the force of friction. How is there friction if the block is not moving? Thanks, Peter G.

Very often we've identified sets of particles with the weights of a semi-simple Lie algebra - for example, the 8 particles of the baryon octet with the weights of the 8 representation of SU(3) global flavour symmetry (in the old days of the Eightfold Way), or the 3 weak bosons with the weights...

If I have a molecule of pb2SO4 for example, how would I draw that? What are the rules that tell me what attaches to what? When it's only 3 or 4 atoms, it's pretty easy to draw them, but when it's more than that, I have no clue what to do.

1) So, does the binary phase always represent the materials 100% on each end? That is to say, if you have lead and antimony, the right side will always represent 100% of one of the two, and the other side will present 100% of the other. If we look in the middle of the diagram, it's 50-50%...

Does anyone here use the package feynmf to generate feynman diagrams? I can use it to build diagrams, but I don't know how to build sums of diagrams i.e. diagramA + diagram B + diagram C Does anyone know how to do this? Thanks

I am writing a paper for a journal. The paper is supposed to have quite a few circuit diagrams. What software should I use to draw the circuit diagrams?

i need some read up material regarding the title any links or references please?

Hello, I want to draw the detailed logic level diagram for a basic computer. For this i found a software that will work which is microsoft visio 2010. But i m not satisfied with that because it has some limitations. Such as re-arranging the wires automatically and also the simulation...

Homework Statement Essentially I am pursuing clues as to what I should do in order to clean up the following circuit: . I'm kind of confused regarding the portion where it says "no contact". Help?

Ray diagrams (lenses) urgent problem. I need full explanations. 1. The question An object of height 2cm is placed 15 cm from a thin converging lens of focal length 10cm. Complete the paths of two rays on the figure to show their passage through the lens to the image formed. 2. The...

Hi everybody, as usual I need help with some definitions regarding many-loop calculations. In particular what do we mean with planar and non-planar topologies exactly? I have an idea but I'm really not sure how to formalize it for an arbitrary big number of loops and legs. Second, once...

Homework Statement Two rockets are sent off at t=0, one from x=0 and the other at x=4. The rocket leaving from x=0 is moving at .8c and the rocket leaving x=4 is moving at .2c. When the paths of the two rockets meet, they send a light signal to x=0. Read off the coordinates in the S frame...

In these notes: http://www.damtp.cam.ac.uk/user/tong/qft/qft.pdf Why can we not have a u-channel diagram in Figure 13 on p64?

Homework Statement Draw free body diagrams: A rectangular block being accelerated on a horizontal, frictionless surface. A skydiver who had just jumped from a plane and hasn't reached terminal velocity. A cube being accelerated up a 30° incline with μk > 0. A pendulum bob that has just been...

...compared to normal particles? I was told this was something about, for a particle moving forward in spacetime, its antiparticle can be considered as moving backwards in space time. but that really doesn't mean anything to me. what's wrong with putting a forward arrow on an...

I'm currently reading Griffiths book (I'm at chapter 4) on Particle physics, and I had a question about Feynman diagrams. In every "node" of a Feynman diagram, what quantities are conserved? Further, what quantities are conserved over the entire diagram?

Homework Statement I have been having a little discussion with a friend. We both know that for a spring/damper system in parallel like shown below, the associated free body diagram is correct. http://img337.imageshack.us/img337/2023/para0.jpg But when it comes to the same system in...