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. P

    On a P-V diagram, if the pressure stays constant and the volume

    On a P-V diagram, if the pressure stays constant and the volume increases, what happens to the temperature? Does it increase, decrease, or stay the same?
  2. O

    State diagram of 4 connected d flip flops

    Homework Statement Draw a complete state diagram for this circuit. http://img829.imageshack.us/img829/7396/unledlwr.th.jpg Homework Equations N/A The Attempt at a Solution http://img208.imageshack.us/img208/1908/20111009003.th.jpg
  3. O

    State diagram for reversible mod-4-counter

    1. Draw a state diagram for a reversible mod‐4‐counter with the following in signals. 00=stand still in the current statement 10=count up. 01=count down. : 2. The attempt at a solution My first problem is that I'm a bit confused about what "reversible mod-4-counter" means. Do they mean...
  4. T

    Analaysis Forces on Free Body Diagram

    So, I have created some blocks, and draw the FBD myself, am not sure if I did it right or not, so I'm going to upload these FBD here, and hope you guys can correct me if I'm wrong. Thanks a lot. A block of m1 and m2, m2 is siting on top of m1. Assume there is no friction on the ground under m1...
  5. B

    Vectors Diagram: Simplifying and Solving Using Trigonometric Laws

    Hey everyone! :) Homework Statement Okay. Here's a snapshot of the question (I'm only interested in parts b) i) and ii) ): 2. The attempt at a solution I know the answer, and I got it too. But I have a feeling that I'm doing too much. Below are snapshots of my attempt (please let me...
  6. S

    Feynman diagram of secondary Sigma plus decay

    Can someone describe the Feynman diagram for the Sigma plus decay to a positive pion and a neutron? I'm fine with the primary decay to the neutral pion and a proton. There appears to be insufficient down quarks created.
  7. 1

    Center of Mass Diagram Don't quite understand

    Homework Statement http://imageshack.us/photo/my-images/24/wtfdiagram.png/ Homework Equations The Attempt at a Solution I really haven't the slightest clue how to read this diagram. I see nothing resembling a U.
  8. S

    LaTeX Making circuit diagram in LaTeX

    Hi I'am having problem making one line diagrams (Power Systems) in LaTeX, I will manage but it shure is troublesome and time consuming. I'am using the package tikz and circuitikz. Attached is a preview of what I would like to draw, and the code assosiated with it. What I would like is...
  9. M

    Shear and moment diagrams: help with moment diagram

    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...
  10. T

    Force and motion in Newton's laws and free body diagram

    A 40 kg girl and an 8.4 kg sled are on the frictionless ice of a frozen lake, 15 m apart but connected by a roped of negligible mass. The girl exerts a horizontal 5.2N force on the rope. What are the acceleration magnitudes of (a) the sled (b) the girl (c) how far from the girl's initial...
  11. 3

    Minkowski diagram - the angle between axes

    I was reading through my textbook and it said that the angle between the axes of two inertial frames, one stationary and one moving at velocity v is supposed to be tan^-1(v/c). I assumed this would be easy to show, but after spending a couple of hours on this probably trivial problem, I can't...
  12. S

    Bifurcation Analysis for the ODE x' = \mux - x2 + x4

    Homework Statement Consider the ODE x' = \mux - x2 + x4 where x \in R and \mu \in R is a parameter. Find and identify all bifurcation points for this equation. Sketch a bifurcation diagram, showing clearly the stability of all equilibria and the location of the bifurcation points. You may...
  13. L

    Simple Forces Question with Diagram

    Homework Statement The following is a physics problem taken directly from my online assignment. As you can see, I only have 6 attempts available in total and I have already exhausted 5/6: As shown in the diagram, someone is pulling on a HEAVY straight rope with force F. Points A and B are one...
  14. J

    Understanding centripetal force and free body diagram

    Homework Statement a person is standing stationairy on Earth (whilst it is rotating) there is a net force towards the centre of the earth. What would the free body diagram look like. Please could someone explain why thanks Homework Equations I know the formula for...
  15. S

    Simple Circuit diagram Question

    The diagram shows identical lamps X and Y connected in series with a battery. The lamps light with normal brightness. A third lamp Z is connected in parallel with lamp X. What happens to the brightness of lamp Y? A) Brighter than normal B) Normal C) Dimmer than normal D) Very dim (cannot...
  16. P

    What is the pattern of circular wavefronts produced by a moving source?

    Hi, :smile: The diagram below shows wavefronts produced by a stationary wave source, S. The spacing of the wavefronts is equal to the wavelength of the waves. The wavefronts travel with a speed V. a) The source S now moves to the right with speed 1/2 V. In the space below, draw four...
  17. Z

    Collapsing Stars on the H-R diagram

    Hi, I've been looking at the Hertzsprung-Russel diagram and was wondering exactly what types of stars collapse to form a black hole? What temperature range/radius etc. turn into black holes. I understand that its most likely the supergiants that form black holes, but what about the giants? Are...
  18. P

    Energy Level Diagram of Magnesium Ion

    Homework Statement Create an energy level diagram for a Magnesium Ion Homework Equations n/a The Attempt at a Solution Correct?
  19. A

    Ideal gas PV diagram heat transfer process

    Homework Statement There is a Pressure-Volume diagram of an ideal gas. The processes make up a (rough) triangle. At constant pressure, we have point A to point C to the right of it to point D to the right of C. Then above A we have point B. C goes to B and D goes to B.. thus forming something...
  20. A

    Heat transfer processes in ideal gas PV diagram

    Homework Statement Note: I know the wording of this post may be lengthy but the problem shouldn't take too long in theory and it's a basic problem from an introductory thermodynamics class so I desperately wish to understand this beginning part so I don't fall behind, so I'd REALLY appreciate...
  21. reddvoid

    Boolean equivalent of shaded area this venn diagram

    1. what is the boolean equivalent of shaded area https://www.physicsforums.com/attachment.php?attachmentid=38605&stc=1&d=1315313022" i tot its abc'+a'b'c but its not one of the options...
  22. W

    Control Engineering: Block Diagram

    Hi guys, this is quite an inbetween question , not really homework but still theory. http://img850.imageshack.us/img850/1290/81696653.jpg Came across this diagram and was wondering if the arrow (in blue box) can be ignored ? Quite irritated by it now since I can't be sure how I should...
  23. H

    Mastering the V and M Diagram: A Comprehensive Guide for Success

    I should know how to do this because I know I've learned it a year ago. This is just a refresher homework assignment and for the life of me I can't remember how to do this. In the attachments, I'm including the problem, the questions, as well as my attempts, which are likely, very wrong. Any...
  24. A

    Venn Diagram problem (Set Theory)

    Homework Statement The universal set u=40 Set A = 20 Set B=17 n(A∩B) = 1/2n(A'∩B') What is the value of n(A∩B)? Homework Equations none^^The Attempt at a Solution The first thing I thought was that because Set A and Set B add up to 37 there must be 3 remaining outside the two sets, and since...
  25. M

    The Typical diagram of a standing wave

  26. A

    Motion Diagram: Swimmer at a Swim Meet?

    In this problem I am asked, in one or two sentences, to explain what this motion diagram is and explain if its an object or a person. http://session.masteringphysics.com/problemAsset/1012700/6/jfk.Figure.01.U37EOC.jpg I have posted a jpg file here of the picture that I need to describe...
  27. R

    How to Model Complex Equations in Simulink?

    [b]1. I am working on a project to achieve maximum power output from a motor using the MEPT (MAximum Energy Power Point) algorithm for a small scale compressed air energy storage system. In the equation to attain efficiency, I am using simulink. I am not able to form the equation for this part...
  28. K

    Al-W Phase Diagram: Research & Info Source

    hey all. i am doing some research about the Al-W system. and i wanted to find out how the diagram was made. i searched and found who made it - Clark W.D.: "THE ALUMINIUM-TUNGSTEN EQUILIBRIUM DIAGRAM", J. Inst. Met. 66 (1940) 271–286. but i can't find any more info , and i cand...
  29. A

    Fully labelled block diagram of 3-bit ‘Flash Encoding’

    Homework Statement Draw a fully labelled block diagram of a 3-bit ‘Flash Encoding’ analogue to digital converter (ADC) and explain how the device converts an analogue voltage into a 3-bit binary number. The Attempt at a Solution anyone know how to do this or have any sources would be...
  30. Q

    Isothermal transformation diagram (picture included)

    using the isothermal transformation diagram provided of an iron-carbon alloy at eutectoid composition, determine the final microconstituants and approximate percentages of a small specimen that has been subjected to the following time-temperature heat treatments. in each case assue the specimen...
  31. M

    Bending moments diagram at T intersection

    Homework Statement Draw the axial force, shear force and bending moment diagrams. Show the locations and magnitude of the maximum and minimum values. Homework Equations See diagram. The Attempt at a Solution I've worked out the values from points A-B and then from points B-D. I...
  32. R

    Assisstance with electrical diagram

    Hello all, I recently began a small project and ran into some trouble with the electrical components. I purchased a small 12v reversible DC motor that came with a potentiometer/PWM controller and a 12v power supply. The motor is capable of running in either clockwise or counter clockwise...
  33. Q

    Plotting S-N Diagram with Cycles to Failure

    how do i plot the follwing S-N diagram, i am having trouble with what I am supposed to do with the 'cycles to failure' figures: stress amplitude ... cycles to failure (y axis)- .... (x axis) 170 ...... 3.7 x 10^4 148 ...... 1 x 10^5 130 ...... 3 x 10^5 114 ...... 1 x 10^6 92 ..... 1 x...
  34. N

    What is the meaning of k in E(k) diagram?

    hello :) , like I said in the title of this topic I am confused about physical interpretation of physical quantity ˝k˝. I came to this problem while doing the first chapter of book in semiconductor physics, where authors simply define some value (parameter) ˝k˝ thanks to solution of some...
  35. S

    Calculating Re-acting Forces of 10m Beam w/ 3 Forces & Bending Moment Diagram

    Question : A beam 10 meters long, with 3 forces acting on it and 2 re-acting forces on it to keep it in equilibrium. The re-acting forces are at 2 meters from either end. The forces onto the beam are at 3 meters from the left end of 10kN, 10 meters from the left end of 20KN and a distributed...
  36. S

    Calculating Bending Moment of Pinned Beam: Is it Negative?

    I have just calculated the bending moment of a beam for every metre over a 10 metre length, the beam is pinned at both ends. Is it possible for the full diagram to be Negative?
  37. G

    Feynman diagram of K0 transmutation

    Homework Statement I need to find the Feynman diagram of the transmutation of a K0 particle (one anti-strange quark and one down quark) into its anti-particle (one strange quark and one anti-down quark). Homework Equations / The Attempt at a Solution s- has a charge of +1/3, d has a charge...
  38. J

    Drawing an argand diagram of complex voltage

    Homework Statement draw an argand diagram of the complex voltage v at t=pi/1800, also how do i obtain the instantaneous voltage Homework Equations i = lcoswt The Attempt at a Solution well so far i have a straight line
  39. R

    Calculating current from diagram.

    Homework Statement from the diagram i drew I want to calculate the current in the battery for the circuit, can someone help me with this. Want to use symbols too. R1 and R2 are in series, they are in parallel with R3, and R4 is in series with R1, R2, and R3. The diagram is attached...
  40. B

    How do I draw the diagram of the mirror charge

    Homework Statement Two point charges +q and -q are placed respectively in positions (-a, 0, +a) and (-a, 0, -a) of a cartesian reference frame, with a being positive and known. The half space of positive x is fully occupied by a conductor. What are the positions and values of the mirror...
  41. R

    Eye diagram on an oscilloscope

    I'm working on some stuff using an oscilloscope, and I need to figure out how to obtain an eye diagram, or eye pattern on it. Right now I just have a function generator hooked up to it. There's a sync output on the function generator as well as the output for the signal. Do I just hook up the...
  42. R

    Electric field and electric charge, whats going on in the diagram.

    Homework Statement This picture shows two points charges, q1 = +5 nC, and q2 (unknown), fixed in place on the x axis. At the location marked P, the net electric field due to both charges is zero: EP = 0 N/C. Based on the information shown in the picture, what can you conclude about the...
  43. M

    Need Help Creating a Free Body Diagram of a Car on a Slope

    Hello. I have attached an image of a free body diagram of a car traveling up a ramp at 30 degrees. I was wondering if anyone can help me determine the sumation of forces in the X and Y direction. I understand that the forces in the Y-direction must be equal to zero or else the car will not...
  44. I

    Renormalisation group - Which critical points are usefull in a RG flow diagram?

    In a RG flow diagram for a physical system where we have two fix points, which one is the most important one and describes the physical theory of the system? Is it the unstable fix point or the "stable" one where some of the flow lines flows towards?
  45. D

    Classical physics (phase diagram

    A ball of mass m rests at times t less than 0, at height h above the ground. at time t=0 the ball is released and fell on the ground after hitting the ground, the ball rests there. a) x represents distance from the ground, drive and expression for the phase diagram when the ball moving toward...
  46. S

    Lewis dot diagram configuration

    So I am doing my lewis dot diagram work, does it matter where i put the valence electors? for example oxygen has 6 valence electrons, i go with using the N E S W (North, east south, west) I put 2 north, 2 east, 2 south but none of west(6 in total so far) but the book puts them in the...
  47. S

    Free body diagram of atwood machine

    Homework Statement I need to find the forces on this modified atwood machine: http://imageshack.us/photo/my-images/36/atwood.jpg/ The Attempt at a Solution What I think: - On mass M there are two forces, Mg and -T. - On the mass above the spring there are two more forces, -2mg...
  48. D

    Question pertaining to Alchemy Diagram

    Before you go all skeptic on me, I am just curious of the meaning of this: My friend and I are curious. So far we've gathered, - Ouroborous - The Seven Stars Raised some assumptions referring to the eternal cycle of life. I understand it's not exactly within the realms of...
  49. Femme_physics

    Engineers view of the world - Free Body Diagram

    Okay, I'm still working on it... but this is a free body diagram of the front of my college's view from a nearby park, which I have special feelings too. It's the place that introduced me to the beauty and majesty of physics, and first place that showed me that I am able to be an excelling...
  50. D

    Where is the Phase Diagram for X and XDot?

    phase diagram for x and xdot.
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