Diagrams Definition and 689 Threads

A diagram is a symbolic representation of information using visualization techniques. Diagrams have been used since ancient times on walls of caves, but became more prevalent during the Enlightenment. Sometimes, the technique uses a three-dimensional visualization which is then projected onto a two-dimensional surface. The word graph is sometimes used as a synonym for diagram.

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  1. honestrosewater

    LaTeX Create Clear, Concise Tree Diagrams in LaTeX for Linguistics | Easy Tutorial

    Like so. Can we already do this? Does anyone else want to? I think it would be helpful. For explaining some things, trees are just so much clearer than anything else. What I can do in code seems quite limited. N /\ / \ A -ness /\ / \ un- A...
  2. J

    Info/help/cct diagrams on ECG machines

    I'm looking for info/help/cct diagrams on ECG machines, how they work etc etc. the full works. Looking to make a "simple" wireless ecg on bluetooth/rf. any help? sites? thanks:)
  3. S

    Phasor Diagrams of Series Parallel RLC circuits

    Hi Guys! well! can anybody tell me the correct way of drawing phasor diagrams of Series-Parallel RLC circuits. I know how to draw for Series RLC and Parallel RLC but don't know WHEN it comes to SERIES-PARALLEL combined. Plz help me. Plus can u recommend me any website from where i can...
  4. F

    Draw free body diagrams for each sphere

    https://www.physicsforums.com/attachment.php?attachmentid=4225&stc=1 Determine the reaction forces at the four contact points A,B,C,D. The hollow balls which are homogenous and made of the same material have masses of 1.02kg and 2.04kg and the chamber they sit in is 55.98cm wide. Everything...
  5. A

    How do you draw electron dot diagrams for pentyne?

    I am having a difficult time understanding how to do dot diagrams, more specific for "pentyne"
  6. C

    Why don't I get these free body diagrams?

    A man sits in a bosun's chair that dangles from a massless rope, which runs over a massless, frictionless pulley attached to the ceiling and back down to the man's hand. The combined mass of the man and chair is 90.0 kg. Ok, I found a solution that had T=Mchair*a + Fnormal + Mchair*g. How did...
  7. G

    .Drawing Ray Diagrams: Tips & Tricks for Solving Problems

    I'm having a lot of trouble drawing ray diagrams (this is for a lab assignment). If anyone could give me some tips or links to websites that are helpful in teaching how to draw ray diagrams that would be great. One example of a problem is: A 1-cm tall arrow (the object) is placed 2 cm to the...
  8. X

    Free software to make energy level diagrams?

    Hi, I am currently doing the write up for a project (Mercury spectroscopy), and would like to put some energy level diagrams in, with the transitions being shown. Does anyone know any software (preferably free/open source) that could do this, or help? Or if there is a way to do it in latex...
  9. S

    Hydraulic piston/ram diagrams or schematics?

    Can anyone lead me to some good hydraulic piston/ram diagrams or schematics? thank you
  10. F

    Simplifying Complex Circuit Diagrams

    i want to transform the black diagram into a series and parellel circuit (as u a see that the black diagram isn't exactly series or parellel). i made the two top left resistors into one (blue circle), and i want to do the same thing for the other two in green circle. however, if i make the top...
  11. J

    Master Free Body Diagrams: How to Draw Them for Different Scenarios

    Free Body Diagrams...help please! hello hello, i'm just having a bit of difficulty concerning free body diagrams: how would i draw an FBD for the following... a) an object has reached terminal velocity. would this mean that the object has reached a constant velocity, therefore force...
  12. A

    Draw diagrams representing Locus

    Draw the diagram that represents the locus in each of the following situations. What is the locus of each? Going down an escalator Sitting in a seat on a Ferris wheel as it rotates. All the points that are 2 cm from a parabola. All the points that are 5 cm above a line. I don't...
  13. J

    How do I draw shear and moment diagrams for a beam?

    I'm not quite sure how to do this. I posted the diagram at my web site...the question is also there, but I typed it here just to give you an idea of what it is about. Thanks! The website: http://www.geocities.com/jessparker502/ For this problem establish the x-axis with the origin at...
  14. J

    Plotting Shear & Moment Diagrams for a Beam

    (i guess this should be easy, but I'm struggling with this section...) I'd appreciate help! I'm not quite sure how to do this. I posted the diagram at my web site...the question is also there, but I typed it here just to give you an idea of what it is about. Thanks! The website...
  15. W

    Free body diagrams for forces on a block

    Hi all, For an online physics assignment I have a question about a block resting on a slope. The question asks what forces are acting on the block.. and I was thinking normal and weight force? But it turned out to be incorrect... list of possibilities to choose from weight kinetic...
  16. V

    Counting Feynman Diagrams with n Vertices

    Is there a systematical way to count all the possible feynman diagram with vertices less than or equal to n...
  17. M

    Stress-Strain Diagrams: Comparing Cast Iron & Stainless Steel

    How the stress-strain diagram of Cast Iron differs from that of Stailless Steel? If someone can post a link of a website from where I can find stress-strain diagrams of different materials, it would be very helpful for me. Thanks in advance!
  18. M

    Constructing Phasor Diagrams for Circuits

    Can anyone direct me to some good sites describing how to construct phasor diagrams based on different circuits? Didn't have much luck using search engines.
  19. R

    Complex amplitude,Feynman diagrams

    A physical process can be represented by Feynman diagrams, each with a complex amplitude. Squaring the sum of these amplitudes gives the rate at which a process occurs. Since a rate can be a frequency,doesn't this imply that before the sum of amplitudes is squared, we are dealing with the...
  20. S

    Solve Free Body Diagrams: What to Do?

    im having trouble solving this? what do i do with mew? thanks :cry:
  21. A

    Solving High Voltage Problems: Circuit Diagrams & Current Calculations

    Please help me wif these problems! I have no idea. A person with a body resistance between his hands of 10 kohms accidently grasps the terminals of a 20 kV power supply. (a) Draw a circuit diagram including all the data. (b) If the internal resistance of the power supply is 2000 ohmns, what...
  22. G

    Into the past ?: Tricky SpaceTime Diagrams?

    Into "the past"?: Tricky SpaceTime Diagrams? It's commonly stated that according to GR, traveling faster than light would mean going backwards in time (to "the past"). When I try to picture the situation with the aid of a spacetime (light-cone) diagram, I still don't get why should it lead...
  23. O

    How Can I Understand Obversion in Venn Diagrams for the First Time?

    I am studying Obversion for the first time in terms of Venn Diagrams. I'm am struggling to understand the conventions. Obversion requires two steps: (1)The quality must be changed. (2)The predicate is replaced with it's complement. Before I go on, I want to point out two types of...
  24. Z

    Program for graphs and diagrams

    Hi, I'm typing up all my maths notes for when I go to university and I have some fairly good programs for displaying all the maths symbols etc. However could someone please point me in the direction of a good program that I could use to quickly make graphs of functions or easily make diagrams to...
  25. T

    Exploring 4D Diagrams: The Possibilities Beyond Our Perception

    I read a book called hyperspace. And in it it mentioned that 4 d diagrams are unperciveable by man and he can picturize only in 3 D. Is that the opinion of everybody? Because i believe that dimensions are themselves only projections of shadows of points. THis is probably already known, i really...
  26. F

    Image formation and ray diagrams

    Ok, a lens is held upright with a piece of clay. In front of it is a bulb, and behind it is a screen at the location of the image of the bulb. Now, what would happen to the image if the top half of the lens were covered by a mask? And what if the mask had a small hole in the center and were...
  27. S

    Question regarding Feymann Diagrams and other QED things

    I have been going through many books on QED, trying to get a general non-mathematical feel for it before I take a course in it and I have come across some questions that I have not been able to answer. Nearly all of the sources I have gone to refer to Feymann Diagrams as a easy way to depict...
  28. U

    Bode Diagrams for Transfer Function: (s+2)/(s*(s+10)*(s^2+2s+2))

    So I have a midterm on Bode Diagrams and Root-Locus on Thursday...and I can not do either. At this point I am only focusing on the Bode diagrams because they are a bit easier and I want to master them now so that I can devote the rest of my time to the Root-Locus. Say I have the transfer...
  29. T

    How Do You Visualize Unit Conversions and Percentages in Diagrams?

    Need help showing diagrams... I am to draw diagrams of: There are 16 units is a cad and 5 units is a gad: how many gads in a cad? I know 16/5 = 3.2 how many cads in a gad? I know 5/16 or .3125 One cad is what percent of one gad? 16/5 * 100 = 320 ONe gad is what percent of one cad...
  30. U

    Understanding Magnetic Forces: Drawing Force F Diagrams

    forces exerted by a magnet After learning about the right hand rules for a magnet on a wire, my packet asks for me to draw the vector diagram for the force F from a magnetic field B on a moving positive charge with velocity v. What is it looking for? I don't know if B is into or out of the...
  31. E

    Application for drawing Feynman diagrams

    Hi, I'm seeking for a software, witch will alow me to easily draw Feynman diagrams. I have currently found: FeynMF: LaTeX package. Not very nice to use, but very good quality diagrams FeynmanDraw: Very primitive WIN software. Not fine diagrams. FeynDiagram: C++ source for drawing...
  32. E

    What Software Can Be Used to Draw Feynman Diagrams on Windows?

    Hi, I'm seeking for a software, witch will alow me to easily draw Feynman diagrams. I have currently found: FeynMF: LaTeX package. Not very nice to use, but good quality diagrams FeynmanDraw: Very primitive WIN software. Not fine diagrams. FeynDiagram: C++ source for drawing. Complicated...
  33. R

    Good references on Feynman diagrams

    I'm looking for some excellent references on Feynman diagrams, from an overview of the basics to a description of the relation between the diagrams and the heavy duty mathematics that they represent. Any information would be appreciated.
  34. B

    Physics Problem: Drawing Vector Diagrams

    Our physics teacher gave us some chapter review questions from another book and I don't understand exactly what to do. Here is the question: a) TownA is located 380km[S64oW} of TownB. Draw a displacement vector diagram and a velocity vector diagram to the same scale. (Our book only shows...
  35. J

    Hydrocarbon Structural Diagrams

    Hello, I was quite curious about this one here... If I were asked to draw a structural diagram, for example, of trimethylbutane, where would I put the three branches of methyl. When they don't specify the location of the branches what does one do? I'd normally be expecting something like...
  36. D

    Help for High School Physics Student: Drawing Force Diagrams

    Hey all, I'm a junior in high school and taking physics. My teacher isn't really one of the best teachers, and we do nothing from a textbook, all done from her drawings/lectures from a whiteboard. It's safe to say I'm just about completely lost in that class. We have a test coming up...
  37. S

    Dispersion Diagrams: Guide to Reading & Creating

    Can anyone provide me with information on dispersion diagrams. I am trying to understand how to read/creat them.
  38. J

    Can Asymptote Approximations Fully Construct a Bode Plot?

    Hi If you have asymptote approximations of a Bode plot - do you just find the vector sum of each asymptote to construct the 'full' bode plot? I hope that makes sense Any help much appreciated Jimbo
  39. R

    Feynman Diagrams and free electrons

    Richard Feynman in his Physics lectures and diagrams show a free electron emitting a photo and/ or absorbing a photon. He (They?) always show the electron being deflected. My question is if the photon has no mass how can or why does the electron react by being deflected in motion? If it is a...
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