Graph Definition and 998 Threads

  1. C

    Converting dt graph (and table) to velocity/time using two point

    How can we convert a distance/time graph (that also contains a table of info) into velocity/time, using the two point method?
  2. M

    Graph Theory Textbooks: Bondy, Murty, Diestel, Trudeau

    Hi All, I am contemplating which graph theory text to purchase. I am stuck between a) Graph Theory by Bondy and Murty B) Graph Theory by Richard Diestel I have already been through Trudeau's intro text on my own and am looking for something deeper and more advanced. I am...
  3. F

    MHB Can a bipartite graph have two non-connected parts?

    For example vertice A connected to vertice B and vertice C connected to vertice D? Would this be considered two different graphs? Here is a graph, would it be bipartite?
  4. P

    Displacement as Function of Time Graph Question

    Homework Statement The graph below shows the vertical displacement of an object as a function of time. (a) Construct a graph of the object’s velocity as a function of time. (b) Construct a graph of the object’s acceleration as a function of time. (c) Describe a scenario in which a...
  5. R

    Theoretical Curve Graph vs Straight Line

    Homework Statement What could be the reason why the graph is formed the way it is?Homework Equations τ = 2π(L/g)^(1/2) The Attempt at a Solution I don't know how to explain it. Anyone know why one is a linear and another is a curve?
  6. W

    How to find the average accleration on a velocity time graph

    My physics problem ask me to find the average acceleration on a velocity time graph. On the graph, velocity is at -6 constantly from 0 - 5 s. I know that an question to use would be average accerlation = delta v/ delta t The problem is I did that and I still got it incorrect on...
  7. P

    Troubleshooting a Velocity vs. Time Graph: Position at t=10

    We are given a velocity vs. time graph. It starts at 15 m/s at t=0 and goes to -10m/s at t=4 then it goes from -10m/s at t=4 to 15m/s at t=10 and we are told to find the postion after t=10 I first found the slope of the first segment which was -6.25. so I did ∫-6.25t+15 dt from 0 to 4 and...
  8. R

    Graph of double absolute values

    Homework Statement |x| + |y| ≤ 1 What is the region in the plane that solves this inequality? Homework Equations The Attempt at a Solution I first tried graphing it by isolating the y variable |y| ≤ -|x| + 1 Then I looked at the hint we were given, which was to assume that x and y...
  9. T

    Proving the Even Degree Property of Vertices in Closed Trails

    Homework Statement All vertices in a closed trail have even degree. Homework Equations The Attempt at a Solution Intuitively, I know this statement is true, but I can't seem to see a clear way to show it. I know that a closed trail is a path that connects vertices, so one would follow an...
  10. A

    Searching 4 graph optimization software

    I'd like 2 solve the following problem (well, routinely solve a bunch of such problems): Let us have a number of points (vertices), that can be interconnected. Not any 2 points are connected. Each connection is assigned a value. I want 2 find the maximum path in the graph, that is, the one with...
  11. R

    What is the 1/e Lifetime of a Graph?

    Homework Statement Given that... The units of voltage are “Volts” and the units of time are “seconds” Show τe (1/e life-time) on your graph and find a value for τe from your graph. ( The definition of τe is similar to the definition of τ1/2 (half-life)) V(t) t(s) 24 0.1 20...
  12. M

    Evaluating Temperature v time graph

    Can someone verify if the answers to part a of the question are correct? Question and answers are in doc
  13. M

    Snapshot graph of Superposition

    Homework Statement The figure is a snapshot graph at t = 0s of two waves approaching each other at 1.0 m/s. Draw six snapshot graphs, stacked vertically, showing the string at 1s intervals from t = 1s to t = 6s. Homework Equations...
  14. W

    What Is the Orbital Length in Km on This Graph?

    Hello I'm not a professional cosmologist but I wanted to know what the orbital length is equal to in Km units in this graph: http://ej.iop.org/images/1538-4357/707/2/L114/Full/apjl334146f3_lr.jpg Thank you so much.
  15. T

    Can a Connected Graph with 2k Odd Vertices be Composed into k Trails?

    Homework Statement Use ordinary induction on k or on the number of edges (one by one) to prove that a connected graph with 2k odd vertices composes into k trails if k > 0. Does this remain true without the connectedness hypothesis? Homework Equations The Attempt at a Solution If k...
  16. N

    Find the max and min of trig function without calc or drawing graph

    Homework Statement y = (4/3)cos(x/2 + pi/6) - (2/3) (0 <= x < 2pi) Find the maximum and minimum values for the trigonometry function without calculus or drawing the graph. Basically in the solution they apply the transformations to the domain given in order to find a new domain...
  17. N

    Shape of mass vs acceleration graph?

    So I know the shape but I forgot what its called. This is what it looks like but what is it called :L, I can't remember. http://antonine-education.co.uk/Image_library/GCSE/Newton_II.GIF
  18. O

    Calculating Displacement from a Velocity-Time Graph

    Hey guys, so I'm having some trouble, not sure if back of the book is wrong or if I'm doing it wrong, probably me though lol. Alright so I have this graph, http://imageshack.us/photo/my-images/27/wqqf.jpg/It's asking me to find displacement at 10.0s. So I know that displacement = area of a...
  19. G

    Displacement on a Position vs. Time Graph

    Homework Statement The graph is of a runner- time(min) is the x position(x1000 m) is the y these are the points 0,0 10,3 20,3.5 30,4.5 The question is- For the time interval between 10 min and 20 min, what is the runner’s displacement? Answer in units of m Homework...
  20. T

    What does the slope of a velocity vs time squared graph represent?

    Basing on the units, the velocity vs time is equal to acceleration. What about the velocity vs time squared and distance vs time squared graph? Is the slope of the distance vs time squared graph one half of the acceleration? If it does, please explain.. :)
  21. J

    MHB Number of Walks in K5 of Length 2: 15

    Consider the complete graph with 5 vertices, denoted by K5. F.) How many walks of length 2 are there in graph K5? Explain. Is this correct as follows for the walks of length 2? K squared (2) = K x K = 0, 1, 0, 1, 0 1, 0, 1, 0, 0 0, 1, 0, 1, 1 1, 0, 1, 0, 1 0, 0, 1, 1, 0 x 0, 1, 0, 1, 0 1...
  22. D

    Hp vs rpm to displacement vs time graph?

    Hello, I am a high school student trying to compare two motorcycles on a displacement vs time graph. The information I have is the mass of riders, mass of bikes, gear ratios, tyre circumference and dyno results indicating hp vs rpm. I am not taking air/rolling resistance into consideration...
  23. O

    How can we determine velocity from a position-time graph without using calculus?

    Hey guys, so I have a quick question about position - time graphs, so without using calculus for let's just say a particle moving west along a horizontal straight line every 0.10 s and the displacement is 0.022, 0.032, 0.042, etc. Well the displacement from t = 0 aren't really good numbers...
  24. U

    What does the area under a Distance vs Time graph indicate

    Homework Statement Given a graph with distance (in meters) on the y-axis and time (in seconds) on the x-axis what does the area under this graph illustrate ? The object has a velocity of 1m/s so after 5 s it has traveled 5m. Homework Equations This is a linear line (i.e y=x) so the area can be...
  25. N

    Finding current and voltage amplification via load line graph plotting

    Homework Statement This is a question refer to a transistor in a common emitter configuration. And this is the table with data of Vce and Ic at certain range of Ib stored in microsoft excel, and the graph is plotted within the file attached(in another tab)...
  26. Q

    Scientific knowledge dependency graph

    I'm asking this question here on a physics forum because a physics question sparked this off. However, it is applicable to all aspects of scientific knowledge. I am looking for a scientific knowledge dependency graph. This is one centralised database which captures the specific and required...
  27. C

    Estimating the damping ratio from the waveform graph

    Homework Statement From the waveform shown below, estimate a) the damping ratio ζ (you may compare response with a standard chart); b) the forced or damped frequency of oscillation; and c) the natural or undamped frequency of oscillation. Homework Equations Since the waveform is under...
  28. R

    MHB What Are Key Strategies for Solving Discrete Math Graph Theory Problems?

    I have these problems I need help with. Can anyone take a look at them? https://www.dropbox.com/s/vq8rk6z5ea5gpwd/Problems.docx
  29. R

    MHB What Factors Influence the Number of Connected Components in Random Graphs?

    Having a hard time with this problem. Can anyone guide me in the correct direction? Random graphs are a fascinating subject of applied and theoretical research. These can be generated with a fixed vertex set V and edges added to the edge set E based on some probability model, such as a coin...
  30. S

    How is the slope of the temperature graph determined?

    In a series of experiments, block B is to be placed in a thermally insulated container with block A, which has the same mass as blockB. In each experiment, block B is initially at a certain temperature TB, but temperature TA of block A is changed from experiment to experiment. Let Tf represent...
  31. B

    MHB What is the Name for a Graph with Loops That Join a Vertex to Nothing?

    Hello, Just wondering if any of you have encountered a term for a particular type of graph. It is like a graph that allows for loops, but for loops, instead of joining a vertex to itself, it joins a vertex to nothing. I just want to be consistent with existing terminology, if there are none...
  32. MarkFL

    MHB Find Tangent Lines to Polar Graph: r=2-3sin(θ)

    Here is the question: I have posted a link there to this topic so the OP can see my work.
  33. H

    Velocity vs displcement graph

    i was wondering what the equation of the line/curve on a velocity vs displacement graph would be which would indicate constant acceleration. I am totally stumped. EDIT:please feel free to shift the thread to any other place if need be, but since it wasn't coursework this seemed to be the natural...
  34. karush

    MHB TI-Nspire CX CAS normal distribution graph

    I am trying learn how to graph Normal distribution with TI-Nspire CX CAS went to the Ti.com but just found a work sheet. or else I missed it some where. but saw some examples on the display. thanks ahead for help:cool:
  35. D

    Graph of f:[0,1]->R compact <=> f continuous

    I know this proof is probably super easy but I'm really stuck. I don't want someone to solve it for me, I just want a hint. One way is trivial: suppose f continuous. [0,1] compact and the continuous image of a compact space is compact so f([0,1]) is compact Now the other...
  36. A

    Pre-reqs for graph theoretic Hurwitz Groups

    So I'm trying to understand this paper (found here: http://arxiv.org/abs/1301.3411) but my math skills are very limited. These include: -Groups (the very basics, like the first of Charles Pinter's book) -Analysis (the very basics) But what all books/papers/topics would you suggest I...
  37. S

    RC Circuits: Graph Homework - Determine Flash Frequency & Voltage Sketch

    Homework Statement A simple type of blinking light circuit can be constructed using a neon lamp. The circuit has a 4.0uF capacitor in parallel with a neon lamp. When the voltage is low in the RC portion of the circuit, the lamp does not conduct electricity. Therefore, it is effectively not...
  38. R

    Pressure-temperature graph without zero y-intercept

    I am a high school physics teacher and I've been trying out an experiment for my students. I used a manometer (a plastic tube in a U-shape partially filled with water) to measure the pressure of the air in a boiling tube. I placed the boiling tube into a beaker of water and varied the...
  39. E

    [Group Theory] Constructing Cayley Graph from Given Relations

    Homework Statement Show that there exists a group of order 21 having two generators s and t for which s^3 = I and sts^{-1} = t^2. Do this exercise by constructing the graph of the group.Homework Equations Based on the given relations, we have t^7 = I.The Attempt at a Solution Since ##s## and...
  40. C

    Notation for time in a relativistic graph

    I was just curious as a possible confusion that might occur when graphing a v vs t Graph. Because velocity is a function of time, but time is also dependant on velocity, so how would we denote this on a graph? Hope i got my point across, thanks!
  41. R

    Where is the Electric Field + Potential zero? Draw a graph

    Homework Statement A -1.0 nC charge and a 1.0 nC charge are separated by 10.0 cm. a) At what position(s) is the electric field due to the two charges zero? b) At what position(s) is the electric potential due to the two charges zero? c) Draw a graph showing the zero electric field and zero...
  42. H

    How to Draw an Acceleration vs Displacement Graph?

    Homework Statement The graph is as folllows-(SEE ATTACHMENT) Q.draw acceleration vs disp. graph. Homework Equations Basic equations of motion, basic calculus The Attempt at a Solution I have tried to write a linear equation in v and s and then differentiating it w.r.t. to time. but I am not...
  43. T

    What is a Clique in Graph Theory?

    Okay, so I just started reading a few books on Graph Theory and Topology (I wasn't sure if I should put this in Topology or here.), and I am just here to clear up some concepts, mainly about Cliques, to be precise what is a Clique? I have read Wikipedia articles and the books, and still No clear...
  44. N

    Writing the equation of a transformed exp function given the graph

    Homework Statement EXPONENTIAL FUNCTION The graph represents a transformation of the function f(x) = 2^x, Write an equation for it. The graph in question is the second one, graph B. http://ars.els-cdn.com/content/image/1-s2.0-S0006349598778683-gr1.gif Since there are more variables...
  45. A

    Speed-time graph What is the highest speed?

    Homework Statement The problem is telling to write the interval of time in which a car has the highest speed. We see in a graph (time-speed) negative and positive values. Homework Equations Definition of speed. Logic. The Attempt at a Solution So, I wonder whether they are...
  46. B

    Understanding the Graph of an Equation | Calculus Help

    Hi everyone, I'm learning calculus at school. Recently I was taught this equation like. Y = (2X^2)/(9 - X^2) So the teacher did all by himself. So I came home and now confused. I know there are 3 graphs(sorry if the word is not right ) so I was doing it again. And I'm stuck at where to get the...
  47. Petrus

    MHB How to sketch the graph of a function

    Hello, I wanted to take some time and show how to sketch the graph of a function! If you see anything that is wrong, please PM me and I will correct it!:) I hope you enjoy, understand and learn!:) 1. An exponential function Draw the graph of $$y=e^{-2x^3+3x^2+1}$$ Okay, the first thing I...
  48. T

    How to remember which to graph first?

    I have a kind of embarrassing problem. When I'm working on problems, especially if there's more than one in a row where it involves a bunch of coordinates I inevitably flip graphing them, instead of going for the x first ill go for the y. Is there a simple way of remembering to do it so I can...
  49. U

    Prove this inequality via graph

    Homework Statement 2x>3sinx-xcosx, 0<x<∏/2 Homework Equations The Attempt at a Solution One possible way is to draw the graph of the functions and compare but plotting a graph manually is not easy in this case. I want some other methods.
  50. A

    MHB Prove Triangle-Free Graph w/ 2n/5 Degree is Bipartite

    In a group of $$n$$ people, each pair are friends or strangers. No set of three people are mutually friends. For any partition of the $$n$$ people into two groups, there exists two people in a group that are friends. Prove that there exists a person who is friends with at most $$2n/5$$ people in...
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