Diagrams Definition and 659 Threads

Im very confused when I see schematic diagrams with ground symbols. In my understanding, those ground symbols are placed in the negative connection in the circuit . Can someone explain me what are "grounds" for?

could anyone help me with cnc turning process, diagram of machine. it be better if you can give me manual book about it. i need to learn about cnc from introduction and part of that machine. I'm new in this course.

Homework Statement Blocks A & B each have mass 5kg, and all contact surfaces are frictionless. Determine the force F needed to keep the blocks in static equilibrium, and the forces on all contact surfaces. Homework Equations I know I need to find where Fx= 0 and where Fy= 0. The Attempt...

Hello. I have a concern in relation to ray diagrams. So I read that the first incidence ray I draw must be parallel to the principle axis and be reflected such that it passes through the principle axis. Ok so this part isn't too much of a worry. However it states that the second ray must be...

[SIZE="3"]In a question He gives that : 0.1 kg of water contained in cylinder-piston device . Water is initially at 1.5 bar and 403 k (Kelvin). More 0.1 kg of water at 2 bar and 403 kelvin is admitted to the cylinder. Through out this filling process, pressure and temperature of cylinder...

Hi Guy's I am just starting out in topology and I was wondering if someone might know of a good link that may have venn diagrams of some important topological terms ie closure of A, int A, limit points etc. regards Brendan

a motor vehicle has a wheel base of 3m. four posta ramp with two wheels each side. ramps front wheels have 6kn and rear 8kn. determine the reaction of the supports on the beam? vehicle is raised 2.25 m vertically this is done in 45 seconds calculate power of electric motor required use...

Hi I need you help a find one article, calculation of multiloop diagrams in arbitrary order Published in Phys.Lett.B267:382-388,1991, please. Thank.

Homework Statement Regarding two-dimensional collisions, I just don't understand why my book suddenly changes vector positions and theta angles at different places than what I was accustomed to. I understand that they're getting me to think by changing questions and answers, but I'm confused...

A help to understand how gravity works in our universe is called an embedding diagram. It is a three-dimensional representation of what happens to a two-dimensional universe in the presence of mass, i.e. the plane is distorted into a 'gravity' pit. What happens if we extend this concept to...

Homework Statement Draw a clearly labelled “Minkowski spacetime” diagram illustrating two events ((1) a farmer firing his laser gun at his cow, which is sitting along his positive x-direction, and (2) the cow dying) as observed by two observers (S at rest in the farmer’s and cow’s frame...

I have some well ordered feyman diagrams which have an incoming neutrino interacting at a vertex with a w boson and emitting an electron. since a neutrino can pass through some 18 light years of led without interacting, I'm wandering how a single neutrino interacts at this vertex?

Roger Penrose is reported to have said: And I understand that, in Minkowski space-time, the relative velocity between two inertial frames of reference is a rotation of the frames, with respect to one another, about a common origin. Now in the description of Minkowski diagrams given...

Is this right? To calculate a scattering amplitude for a certain scattering event, you take the term in the wick's expansion of the S-Matrix that suits your situation best. Then you draw a Feynman Diagram that corresponds to the term in the wick's expansion, then just use the Feynman Rules to...

hi everyone, I want to know how i can draw the schematic diagrams of the circuits. I understand the therory but i have no idea how you make the circuits and draw the schematic diagrams of them. Thanks

What is the difference between a circuit diagram and a wiring diagram. And while your at it can anyone explain the difference between diagram that routes fibers/ connections to from a battery to a lamp for example as opposed to the alternate... one that routes to the connector on the battery...

if you go down to the section called "do they always exist?" you'll find a venn diagram for 6 sets: http://www.combinatorics.org/Surveys/ds5/VennWhatEJC.html would a horizontal cross-section resemble a cantor set, if there were infinitely many sets? it looks like it would vaguely resemble...

Hello I'm looking for diagrams (Kruskal and Penrose diagrams) representing Minkosky spacetime. I found two diagrams at http://nrumiano.free.fr/Estars/int_bh.html (the two first diagrams of the page). Do they represent a Minkowski spacetime ? Thanks, Jeff

Hi everyone. So I'm typing up some notes for some high school kids I'm helping with their math (I'm not tutoring them for money, I'm helping them informally). I want to put diagrams in my notes, you know the usual stuff: graphs of the usual functions; explaining concepts in diagrams; geometry...

Hi. The question is: Draw the shear force and bending moment diagrams for the simply supported beam shown below. State the values of the greatest shear force and bending moment, and the bending moment at D. The diagram is attached as is my attempt at the answer. I hvae not stated the values of...

I'm confused about how to draw scaled vector diagrams. I have a scale and I can do the first two vectors, but then I get confused. Let's say my vectors are 10 cm at 0 degrees, 5 cm at 45 degrees, and 11 cm at 212 degrees. How do I draw this? I have this:

Is it really necessary to learn how to calculate loop diagrams in QFT? In the Wilsonian approach, you only need to calculate tree diagrams. In the loop approach, you have to relate the experimentally measured coupling constant to the bare coupling constant, and I guess the difficulty is...

Homework Statement In each of the two free-body diagrams, the forces are acting on a 2.6 kg object. For each diagram, find the values of ax and ay, the x- and y-components of the acceleration, with F1 = 5 N and F2 = 3 N. Picture is attached. (a) Diagram A ax =____ m/s2 ay =____ m/s2 (b)...

Hi Does anyone know any good libraries to use to draw circuit diagrams in LaTeX2e? (except CIRC which looks ugly in my opinion)

Homework Statement A hockey puck slides along a horizontal, smooth icy surface at a constant velocity as shown. (Part A figure) Which of the following forces act on the puck? Okay, for this the choices are (list check all that apply) force of velocity x air drag...

Homework Statement Show that a point Q outside the "light cone" can occur either before or after a point P inside the light cone (eg: at the origin), depending upon the frame of reference. Show that a point R inside the light cone is always in the future or in the past with respect to P...

Homework Statement If i have a picture of a motion diagram of 2 objects , how do i tell when they have the same speed and acceleration? and at what time one object is ahead of Object B ? I have a diagram here http://i33.tinypic.com/28kpk02.jpg Homework Equations none The...

Hey all, I am just wondering if one can directly calculate the Einstein coefficient in spontaneous emission of, say, two-level atoms through feynman diagrams? I searched for sources in google but could not find anything. Thanks a lot for an answer! Wit best regards, blue2script

Homework Statement Here is pictures of some of the mechanisms I draw the free body diagrams for Homework Equations EF= 0 EM= 0 The Attempt at a Solution I am not sure how to even begin on the first problem other than drawing the force from the hand of 400 N.

Homework Statement http://img3.imageshack.us/img3/2178/9b26f2dd8dd8a8686c9c8c2.th.png Homework Equations \vec{\upsilon}= \vec{\Delta} V / ( B d) \vec{\upsilon}= u E The Attempt at a Solution from the diagram , we have \vec{\upsilon} = 1.25*10^-5 V/(B)(0.001m) using the...

Homework Statement so I've had no real problems with this unit at all until i got to this first question. I had no idea where to start, but i tried working some things out, and couldn't get the right answer. the second question seems to be along the same lines with my problem. when the given...

I have just started a class that deals with relativity. My professor uses space-time diagrams all the time but has never bothered to fully explain them. Every time I have questions about my homework problems, people tell me to work it out by drawing a space-time diagram. Could anyone explain...

how do we go about deciding the directions while drawing the velocity and accleration diagrams for a given slider crank or slotted crank mechanism.while drawing the accleration diagrams,2 components -tangential and radial component need to be shown ,so when we draw the tangential...

hi all, i have a question regarding page 81 in Srednicki's QFT book. He states there that the sum over all connected diagrams with a single source is zero. Then he says that if you replace this single source by an arbitrary subdiagram the sum will still be zero. Can somebody explain why this...

Hi everybody! I'm a new Physics Forums user and hope someone could help me out with my minor dilemma. I'm a PhD student in mathematical/theoretical physics and I' working on the Boltzmann equation in QFT. Up to now, there was no major emphasis on Feynamn diagrams - the approach was rather more...

Homework Statement I do not understand the following statement (Please, see the attachment): "C4 has trivial subgroups and only one cyclic subgroup of 2 elements, namely <b>. This is because both a and c can be verified to be generators of C4." The Attempt at a Solution The notation...

Homework Statement Let G be a group, and let H and K be two subgroups of G. Then the union of H and K is a subgroup of G such that the intersection of H and K is an empty set. Can you visualize the product hk in a venn diagram for all h which belongs to H and for all k which belongs to...

Homework Statement "Three blocks (m1, m2 and m3) are in contact with each other on a frictionless, horizontal surface. A horizontal force is applied to m1. http://i4.photobucket.com/albums/y111/kathy_felldown/sb-pic0556.png What is the net force on block 1? " When drawing free body...

Hello all I have been at ease with spacetime diagrams of the usual sort where the y and z dimensions are suppressed until I came across this passage from the following book. Problems of Space and Time. A reader edited and with an introduction by J.J.C.Smart. Page 293 of the chapter...

"...lowest scatter Hubble diagrams ever published" (Bailey et al) This is big news for cosmology. More accurate determination of distances and therefore of the Hubble parameter---a key proportion basic to the whole field. http://arxiv.org/abs/0905.0340 Using Spectral Flux Ratios to...

I was wondering if anyone could please explain what an intensity diagram would look like if you had a layer of fresh water ontop of x amount of meters of salt water (or vice versa). What is the concept behind this? How could you draw it? The question keeps popping up in past exam questions but i...

Hi all, I have been reading the book "Computational Dynamics" by Ahmed Shabana, and have a few questions. The book talks about creating "free-body diagrams" for constrained rigid multibody dynamics problems. I have attached two examples: The first is a "pendulum with a moving base": which...

Hello. I'm looking for electronics diagrams & schematics of very fist TOF mass spectrometers like the one of W.E.Stephens or Cameron's Ion Velocitron. These electronics equipements used vacuum tubes and present very interesting characteristics. If someone knows where I can find such schematics...

I'm sorry if this is the wrong forum but I think that mathematicians often work with LaTex and should be able to answer. Could you please recommend me any kind of software for creating diagrams (plotting functions, drawing vectors, writing down matrices, etc) and then converting these...

A person is on a bicycle, there are several situations like the bike is at rest, accelerating,etc. The one I'm having most trouble with is when bike is in constant velocity. For the bike,I have gravity and force of person acting downward, normal force upward, force applied to the right and...

Does the TeX install here have a diagram package? For diagrams like commutative diagrams. It would be nice.

hello, I am trying to follow the arguments in Peskin pages 96-97 where the exponentiation of disconnected diagrams are performed. I think the 'proof' is too 'not detailed' and was wondering if there exists a better explanation elsewhere? My biggest question is the sentence on page 97 "The sum...

Homework Statement Draw the diagram P=(X,P) where X={1,2,3,5,6,10,15,30} and x<y in P IFF x divides y. Homework Equations The Attempt at a Solution We just started this discussion in class and I am really not getting the concept of how to draw the corresponding Hasse diagram. I...

Hey, can anyone help me with drawing karnaugh maps using venn diagrams? i don't full understand how to.. thanks

Hey everyone hows it going? I am not sure if this is the right place to be posting this question, but hopefully it is. My names Shawn and I am a senior in high school. I currently have AP calculus and gen physics, and I plan on taking the AP calculus test (ab) and hopefully the physics AP test...