What is Diagram: Definition and 1000 Discussions

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. S

    Need Help with Free Body Diagram of Oil & Gas Packer Tool

    Has anyone created a thread on Free Body Diagram on assembly having many components ? For example a Casing having premium threads in both end and a set packer within it. What would be the FBD equations to determine various forces and reaction forces
  2. hagopbul

    Find the schematic diagram for a power amplifier (for repair)

    Hello all: Doing some training in electronics repairing , and need to find some schematic diagrams for power amplifier , Google is not helping with that ,any suggestions where should I look Best Hagop
  3. Athi Sankar

    Turning Moment of Single Cylinder 4-Stroke Engine | Explanation

    Figure 1 shows the Turning Moment diagram of Single Cylinder four stroke Engine. Can anyone tell me, how the turning moment becomes positive at the end of suction and exhaust stroke. Net force F = Force due to gas pressure - Inertia Force - Reaction Force due to friction If the net force...
  4. amare

    Where can I find a wiring diagram for this Toyota air throttle body?

    Where I find the wiring diagram for the throttle body in the link? https://www.eurofrance.pl/en_GB/p/Air-Throttle-Body-192300-2010-0R011-Toyota/65407?currency=PLN
  5. jisbon

    Help Me Solve My Diagram Problem: Calculating Center of Mass

    Not sure what I went wrong here, anyone can help me out on this? Thanks. EDIT: Reformatted my request. Diagram: So as far as I know to calculate the center of mass for x, I have to use the following equation: COM(x): ##\frac{1}{M}\int x dm## And I also figured that to find center of mass, I...
  6. J

    How does applying potential affect the energy band diagram for a diode?

    Ref: http://hyperphysics.phy-astr.gsu.edu/hbase/Solids/pnjun2.html Hyperphysics Asstr Why does the band diagram shift up or down when I apply potential? Why does it shift down when positive potential is applied? Professor said it's because electron has negative charge and so we consider...
  7. msfd

    Question regarding this Basketball Kinematics Diagram

  8. berlinspeed

    B Why Does Proper Time in Lorentz Geometry Use t²-x² Instead of t²+x²?

    Can someone tell me why the proper time between αβ is not t2+x2 but rather t2-x2? Background:
  9. Shivam

    Draw the F.B.D. (Free Body diagram) of two blocks

    Summary: In the situation given, all the surfaces are friction less, pulley is ideal and string is light, F=mg/2, Find the acceleration of block 2 ? Here's the diagram-- My attempt- (i) I tried to solve the question by making FBD of the two blocks, but i am not able to draw all the forces...
  10. SamRoss

    I Why Is the Green Observer Always the Bent One in the Twin Paradox?

    I feel a little guilty writing this post because I'm sure there are people here who are tired of answering questions about the twin paradox, hence the FAQ post on the subject, but there's something which is still nagging me. First I have a question about the FAQ post itself. Toward the bottom of...
  11. E

    G-force diagram on a roller coaster?

    So, while we were going up the track, the z-direction gforce seemed to go up. It went from -1 to about -0.6. The x-direction seemed to be around 0, more or less? All x values were under 0.177. The y-direction decreased, more or less, from -0.4 to -0.9. I think if I understand how the force...
  12. C

    What will the phasor diagram of this LCR circuit looks like?

    I know the current of capacitor and inductor must be parallel but pointing in opposite direction due to the fact they are connected in parallel thus having same voltage (please see attached screenshots). The current of resistor will simply be the sum of these two vectors, but what about its...
  13. P

    Get the Voltage from the I(A)-Time diagram

    The area under the diagramm is the capacity.Q=I(A)*t(s) How can I can get the Voltage so tha I get the energy of the battery and capacitor?
  14. Benjamin_harsh

    What is the moment for this diagram?

    What is the moment for this diagram? I am getting two moments; ##M = F.S## and ##M = -F^2.S## I am getting confused.
  15. Benjamin_harsh

    Why is moment ##F.S## instead of ##F.\frac{S}{2}## for this diagram?

    Why is moment ##F.S## instead of ##F.\frac{S}{2}##?
  16. Benjamin_harsh

    Where I am going wrong in summing moments for this diagram?

    ##\sum M_{A} = F.(d+d` )-F(d+d` )-F.d## I am getting negative answer. Where I am doing wrong in summing moments for this diagram?
  17. Benjamin_harsh

    What direction is the force acting at A in this diagram?

    What direction is force acting at A in this diagram?
  18. Benjamin_harsh

    How Fx = F(4/5) in this diagram?

    ##Fx = F\frac{4}{5}## How Fx = F(4/5) in this diagram? I am confused.
  19. M

    MHB Minimizing Expression w/ Karnaugh Diagram

    Hey! :o I am looking the following: Determine a disjunctive normal form for the expression $$x_1\left (\left (x_2x_3\lor \bar{x}_2x_4\right )\lor x_2\lor x_3x_4\right )\lor x_2\bar{x}_4\bar{\left (\bar{x}_1x_3\right )}\lor x_1x_3\bar{x}_4$$ and minimize it using a Karnaugh Diagram. The above...
  20. Benjamin_harsh

    How to represent this statement in a diagram?

    Statement: My friend represented this sentence "Two forces have magnitude of 3N and 5N, and have an angle of 60 between them" into this diagram: But why didn't he represent like this?:
  21. jk22

    B Should the 'time' axis of a Minkowski diagram be time's imaginary unit?

    Since the metric is euclidean in coordinates ##(ict,x)## it can be drawn in a plane, but if the metric is ##diag(1,-1)##, can both axis still be drawn in a plane ?
  22. H

    What is the Well-Known Feedback Expression for Block Diagram Manipulation?

    Hello I hope someone can help me, as i am kinda stuck for the moment. As you can see, the assignment states that I need to find the poles from the closed loop transfer function. I plan on doing so, by using block diagram reduction method. This is as fare as I've come, and can't come...
  23. R

    Piping and Instrumentation Diagram (Question)

    Hey everyone, I am an energy modeling engineer, and I would like to ask a question regarding a project I am working on. In the attached instrumentation diagram (and I also found this on AHU specification tables), what does it mean to have "air flow1/air flow2" (see figure). I deduce it is the...
  24. H

    I Pole Identification Using Block Diagram Reduction

    Hello I hope someone can help me, as i am kinda stuck for the moment. As you can see, the assignment states that I need to find the poles from the closed loop transfer function. I plan on doing so, by using block diagram reduction method. This is as fare as I've come, and can't come further...
  25. Zouatine

    Question in thermodynamics -- Two paths on a P-V diagram....

    Hi every one , I have this question today : The two arrows in the figure show two thermodynamic processes of a certain amount of ideal gas. The dashed line is a hyperbola. Which of the following statements is not true? a. The heat transfer is the same in the two processes. b. The temperature...
  26. C

    How does specific volume play its role in the phase diagram?

    So, I am casually sifting through a chapter in a thermodynamics textbook talking about the multiphase process that pure substances go through. I understand how the P-v and T-v diagram works and that out of the three properties (specific volume, temperature and pressure), two of them are...
  27. S

    A Penrose diagram of black hole with a changing event horizon

    Dear all, I have a question on Penrose diagrams. Consider a collapsing star that forms a black hole with a Schwarzschild radius normalized to 1. What happens in the Penrose diagram when additional matter falls in? I suspect the diagram then has to look like this : When the outer shell (second...
  28. F

    B Any interest in a spacetime diagram generator?

    Hi, I've written a script-based spacetime diagram generator. I have no idea if it has any value for anyone besides myself—you may have access to better tools than I do. When I looked for spacetime generators, I only found some very limited web tools and one downloadable program that wasn't much...
  29. Romain Nzebele

    Understanding Free Body Diagrams: Explaining the Forces on a Compressed Board

    Hello everyone. I find the following problem confusing. A board sandwiched between two boards in the figure below weighs 95.5N. If friction exists between the middle and the compressing boards, draw the free body diagram of the middle board. Below I attached the diagram found in the solution...
  30. opus

    Force Diagrams for Sliding Block on Inclined Plane

    Homework Statement This is more of a general question, not specific to any problem. I am not too good at drawing force diagrams so I was hoping I could post an image and get some guidance on how to find the forces acting on the object. In this case, we have a block sliding down a plane of angle...
  31. morrobay

    B Rocket Sends Light to Mirror: Event A to Event C Diagram

    https://www.cockcroft.ac.uk/wp-content/uploads/2015/10/gratus_RelWorksheet.pdf Refer to diagram at top page 8 showing light signal reflected (Event A) back to rocket (Event C) on t'.axis. If the space axis x' were drawn showing the position of rocket when the light signal was returned from...
  32. physics_pi_rate

    Thermodynamics: P-V diagram question

    Homework Statement A monoatomic ideal gas undergoes a linear process whose equation is given by P/po+V/vo=1. find the volume when the process turns from an exothermic to an endothermic one. P-Pressure V-volume Po= pressure when volume is nearly 0 and Vo is the volume when pressure is...
  33. V

    Analyzing Forces & Electrons: Free Body Diagram

    Hi i am posting this to double check my work. Please help and feel free to ask any questions. I posted a picture of my work and what i currently have. 1. Homework Statement Two small insulating objects are hung from strings attached to the ceiling. The masses of each object is 0.0076 kg. The...
  34. J

    Electric Potential and Field Diagram - True/False

    Homework Statement Four charges are arranged at the corners of a square as shown in the figure. Q1 is at (-L/2,L/2), Q2 is at (L/2,L/2), point a is at the origin and Q1=Q2=-Q3=-Q4. Which of the following statements correctly describe the electric field E and the potential at points a,b and c...
  35. L

    Engineering Synchronous Induction Motor Phasor Diagram & Calcs Help

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  36. S

    B Minkowski Diagram: Expanding Universe

    Is this how you would draw the Minkowski space diagram with space expanding, (without acceleration or black holes) ?
  37. L

    MHB Creating XML DTDs from UML Class Diagram

    The question first asks to generate a UML class diagram for a bus company, which I did in the attached image. The methods arent filled in. Then the Q asks to" generate several XML DTDS, with atleast 1 attribute in each DTD, and take care to represent associations between classes" Im familiar...
  38. Adrian Tudini

    I Diagram of CO2 dip at 4.3 microns

    hi I am trying to find a free diagram of the CO2 absorption dip at 4.3 microns? I need it for interest purposes! Thanks.
  39. YC_128

    Thermal efficiency of the engine in a PV diagram

    A heat engine takes 2.0 moles of an ideal gas through the reversible cycle abca, on the pV diagram shown in the figure. The path bc is an isothermal process. The temperature at c is 820 K, and the volumes at a and c are 0.010 m3 and 0.16 m3, respectively. The molar heat capacity at constant...
  40. nomadreid

    I Compton scattering in a Feynman diagram

    Attempting to understand the following: Compton scattering can happen either (a) an electron could absorb a photon and later emit a photon, or (b) an electron could emit a photon and later absorb a photon. OK, the maths works out, but I am trying to get intuition on track. These two are...
  41. cookiemnstr510510

    Reading a Binary Phase Diagram (lever rule etc.)

    Hello All, Wanted to see if I am approaching this problem correctly, I have an exam coming up and am pretty sure something like this will show up. Examine the phase diagram (phase.jpg) with a 20WT% A and 80WT%B which is allowed to cool slowly from liquid A) what temp does the first solid...
  42. Raymont

    Divergence of the amplitude for a Feynman diagram

    1. The problem statement In calculating the amplitude for the diagram[1], view 1.jpg. [1] Voja Radovanovic, Problem Book Quantum Field Theory 2. Homework Equations View 2.jpg. The Attempt at a Solution View 3.jpg.[/B] Why the integrals is divergent? Why the other terms are finite?
  43. Cardinalmont

    B Feynman Diagrams: Uncovering the Issue

    Hello, I assigned a work packet to my IB Physics students that guides them through how to make Feynman diagrams. This particular problem seems to have some issue, but perhaps it is something that myself and my class have all over looked. Note: At the beginning of the packet it states that some...
  44. Alice_in_Wonderland

    Two linebackers simultaneously hit a quarterback: Force Diagram

    Homework Statement Two linebackers simultaneously hit a quarterback, who has a mass of 90 kg. One linebacker exerts a force on the quarterback of 500 N, 25° N of E. The other linebacker exerts a force on the quarterback of 450 N, 60° S of E. Determine the net force acting on the quarterback...
  45. A

    What are the equations for circular motion on a Ferris wheel with R2D2?

    Homework Statement 3. Consider R2D2 (a droid) with mass 30kg riding on a Ferris wheel with diameter 25m, with a velocity of 2.8m/s. a) Compute the free body diagram for R2D2 at the exact top, exact bottom and at both horizontal positions. Remember to include gravity. (Note: The forces act in...
  46. M

    Free body diagram on a block pushed against a ceiling

    Homework Statement A 2kg block is being pushed along a ceiling with friction by an angled force of 70 degrees. I'm asked only for the free body diagram. Homework EquationsThe Attempt at a Solution I figured both the gravitational and normal force would point downwards, but the force applied at...
  47. YMMMA

    PV diagram/ which labeled process has no temperature?

    Homework Statement I have had a question in my quiz that I don’t remember very well, but here’s a diagram and there’s no need for numbers in axis because it’s a concept- based question with no calculations. The question asks if an ideal gas system moved from A-B-C-A. Where is the process by...
  48. Wrichik Basu

    B Which ray diagram is correct for a Compound microscope?

    Here are two ray diagrams for compound microscope, the first one proposed by the book, and the second one recommended by the teacher: In the first image, the light rays form a real image A'B', which becomes the virtual object for the eyepiece. See, the original rays are carried forward to...
  49. EastWindBreaks

    Why is the output in the middle of the block diagram?

    (mentor note: not really a homework as the OP seeks understanding from an article) 1. Homework Statement I saw this on https://www.electronicshub.org/open-loop-system/, I thought the dry clothes should be the output, and heating the cloth should be the plant/process, I am so confused...
  50. P

    SR - Time dilation, space-time diagram, and radio signals

    Homework Statement P.S.: I'm not sure if it is allowed to ask multi-part questions. Two equally old sisters Alice and Barbara leave Earth simultaneously in opposite directions. The following velocities and distances have been measured in the Earth system. Alice travels with a speed of ##v_A =...
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