Diagrams Definition and 659 Threads

Shear and Bending Moment Diagrams! Homework Statement Homework Equations Newton's 2nd and 3rdThe Attempt at a Solution So my main confusion is this: I found the reaction at A to be 19 kN If I make a vertical cut through some arbitrary point along the beam and and do some analysis I get...

Heya! I'm new in the forum, and here is my first entry. I don't really understand the diagram for wave difraction. Let me try to draw it... | | | | | The space between the four three lines is suppose to be the wavelength. | | | | | | | | | | The last line is suppose to...

I'm trying to understand Feynman diagrams interpretation in terms of virtual particles. What I still can't understand is how this interpretation is compatible with the fact that one should divide each diagram by its symmetry order. As far as I understand, diagram symmetry order means how many...

I was thinking about how one would teach special relativity using a spacetime-geometric approach. I think you would first show spacetime diagrams in a single frame and describe velocity as the slope of the worldline. Then when you moved onto other frames it would be natural to leave the slope...

Homework Statement Two friends are carrying a crate of mass 200 kg up a flight of stairs. The crate has length 1.25 m and height 0.50 m, and its center of gravity is at its center. The stairs make a 45.0 angle with respect to the floor. The crate also is carried at an 45.0 angle , so that its...

Okay I'm supposed to draw a circuit diagram of an apartment, including the circuit breakers power meter. How do I draw that something is plugged into an outlet? I'm supposed to draw the 'kitchen' with 3 panels, parallel circuits used, and following these requirements: -one panel contains...

Homework Statement (*I have solved similar problems before and know the method, but my results don't make sense, so I want to make sure I understand this particular potential. Also, I am new to Latex so ignore the equal portion of the less/greather than or equal two signs.*) I made a diagram...

What distinguishes Fermions form Bosons in Feynman diagrams?

Category Theory: ?What is up with these Diagrams? So I found a basic category theory book online and was trying to learn some of the basics. Many of the proofs are done in diagram form (and it seems to very greatly reduce their lengths). However, no where in the book does the author prove...

Is there any Short circuit protection diagram designed for power supplies which the current doesn't drop below 1A? Can you show me any?

[SOLVED] current and potential difference, simplifying circuit diagrams Consider the circuit shown in Figure P31.69, in which RA = 25 and RB = 7 . Tabulate the current through, and the potential difference across, each resistor. Figure P31.69 resistor current (A) potential...

Goodevening, I am confused with Venn diagrams questions(2/3 circle diagrams). Can i find some online resources which explains its concepts(including advanced concepts). Eg. 3circled(A,B,C) diagram is there. Find minimum/max. possible of ONLY A such that B is minimum/maximum - how to do these...

Homework Statement A skier goes down a slope with an angle of 35 degrees relative to the horizontal. Her mass, including all equipment, is 70 kg. The coefficient of kinetic friction between her skies and the snow is 0.15. A. Please draw a free-body diagram of the skier. B. Calculate the net...

Here is the problem i need help with. I run up a down escalator at a speed of 2 m/s while the escalator is moving at a rate of 0.75 m/s. What is the resultant velocity? Of course, I do not need help getting the resultant velocity. I just need help drawing the vector diagram that can help...

So here I'm begging for your suggestions. Thanks.

Homework Statement Which of the following vector diagrams represent "A" as a sum of "B" and "C". (A=B+C) http://img402.imageshack.us/img402/94/vectorsnj3.jpg Homework Equations None that I know of. The Attempt at a Solution I think the answer is number 1, because A is the...

Hey guys, So I've Latex'd some papers and assignments in the past, but something that's always daunted me is how to make those snazzy custom figures that the TAs always make in their homework solution writeups. Is there some program that most people use to make their diagrams that they then...

I'm looking for a good book for graduate students that indicates how one can obtain a (classical) potential from a tree-level Feynman process. For example, how can one go from the S-matrix of e.g. Compton scattering and derive the Coulomb potential. Any help would be appreciated.

Homework Statement http://img61.imageshack.us/img61/4585/8m1cdhx1.gif I understood every except, How do they get the 9 degrees in part c? Homework Equations The Attempt at a Solution

Hey guys I'm new here and I'm lookin' for some help as I'm sure a lot of you come here for that reason as well. I did an experiment where I fill a 150 mL half full, place a pencil in the middle and move it sideways until it reaches the side of the beaker. Then I am to draw a ray diagram of what...

Hi everybody, I am a MAC OS X user, and I have a trouble with feynmf package in latex. I have downloaded the package from CTAN website and followed the instructions for installation. Then in my latex file I coded a generic 2-body scattering process labeled as "generic", after typesetting...

Given S is set for all real number. A is set for all even number, B is set for all positive integer, C is set for odd number represent the relationship between the sets with Venn diagram. This question is seems easy. However, there is a problem that how can we illustrate the three sets in...

Homework Statement i've never had a QM class let alone QFT, I've only even had intro physics 1 & 2, but I've been given a problem that is very similar to this: -ie^3 \int {d^4 q \over (2\pi)^4} \gamma^\mu {i (\gamma^\alpha (r-q)_\alpha + m) \over (r-q)^2 - m^2 + i \epsilon} \gamma^\rho {i...

My question is for free body diagrams with tension on top and mass hanging from the bottom. Why is it "T-mg" sometimes and "mg-t" other times. How do I know which one to use? I was doing gravitation questions where "T-mg=Fc" sometimes and "mg-t=Fc" other times.

Hi I have some very basic doubts on spacetime diagrams. Please refer the figure attached. Here in this spacetime figure an event E is shown as observed from K and K'. K' moves with v with respect to K. The axis CT is tilted angle alpha following vt, so that any event that occurs at x' = 0...

There is nowone who can help me on the homework forum, so i'll try it here...

In dispersion relation diagrams, where omega is plotted against k, omega is sometimes nonzero at k=0. How is this possible? I thought a wave had to have a nonzero wavenumber :confused:

1.in band diagrams, books usually show parabolic bands for the conduction band and the valence band. They will also make note of the acceptor and donor leves in the band gap. However, they always draw straight horizontal lines for these levels. Is that correct? The impurity levels are...

Homework Statement If w=costheta + i sintheta and theta is between -pi and pi: Find theta if E O and A are on the same straight line. E is a point on diagram representing w(z3). Homework Equations The Attempt at a Solution Ive found the following: z1 (1+(sqrt3)i) z2...

Homework Statement All I'm trying to do is translate the cell diagram below into a into a an equation so I can determine which is the anode and which is the cathode. Here is the cell diagram. I know how to balance it, I just want to make sure I'm putting reactants and products on their...

General Questions: How do you show Free-Haul Distance, Limit of Economic Haul, and Volumes of Waste and Borrow on a mass diagram? I don't have one in particular to ask because I'm pretty much lost in general with this topic. Windrose: Another general question, how do you determine which...

Hey does anyone know what prgram you could use to draw a ponchon and mccabe diagram for mass transfer. Particularly one that's downloadable :P. Cheers.

I have posted a question on the Tutorial subforum because there was already a thread on that subject but I figured that people here may be more likely to be able to help me out https://www.physicsforums.com/showthread.php?p=1313121#post1313121 Thanks! Patrick

Hi, I am not too sure about my lewis dot diagrams, can someone check them and let me know if anything is wrong with them, thanks.

does anyone know of any software i could use to construct simple circuit diagrams? (such as series and parallel circuits containing bulbs, resistors, thermistors, voltmeters, ammeters...) i teach physics 11-18 and it'd really help with lesson planning, thanks in advance

I am in an electronic circuits laboratory class, and I am looking for a free, easy to use program that will allow me to construct circuit diagrams for my reports. Any ideas? Thx!

just a clarification cause it's been so long if you have intersection in a venn diagram, is it general practice to label the section including the intersecting diagrams. say you have two sets of 10 with 5 things in the intersect. do you label it 10 in the 2 sets and 5 in the intersect. or. 5...

shear force diagrams simple stuff hey!? hey guys this is probably very straight forward stuff for u but i have an example question on a loaded beam. there is a UDL, 2 pure couples and 2 fixed points. now how do i do the shear force and bendin moment diagram for this really lookin forward...

Homework Statement I have to do this for a lab. Draw and label the free body diaggram of a pendulum when it is at its maximum amplitude of 30 degrees. The magnitudes of the vectors must be correctly scaled and the directions correct. Homework Equations The Attempt at a Solution...

Why is it that we align the vacuume level (when drawing the band diagram) first before we put two pieces of semiconductor together? (My book talks about how the energy of the two free electrons should be the same when each of them jumps out of its respective material...but it is not entrirely...

http://arxiv.org/abs/hep-th/0611042 Hidden Quantum Gravity in 4d Feynman diagrams: Emergence of spin foams Aristide Baratin, Laurent Freidel 28 pages, 7 figures "We show how Feynman amplitudes of standard QFT on flat and homogeneous space can naturally be recast as the evaluation of...

Are there any tutorials available that explain how to create an energy level diagram for related reactions? I've done a search on google but came up with nothing. Thanks.

Hi physics fans, I've made four diagrams for inclusion in a physics lab report. They depict situations in which a meter stick is in static equilibrium (no net torque, no net force). My professor mentioned to me that my analysis of the forces on the stick is not correct, but was not more...

Hi, I have had a slight confusion on the Force and Free-Body Diagrams. I know that they are represented by arrows for the vectors in the direction of the force and that forces exerted on the object are shown. Are the forces exerted by the object also shown for the Force and Free-Body Diagrams...

I keep getting the wrong answers on a few problems I am working on. Could anybody tell me how do get the answers from these motion graphs please? Thank you! (They are attached) The question is as follows for motion_diagram1.jpg The figure below shows 3 motion diagrams A, B, and C. The time...

http://www.sendspace.com/file/czhuhx http://www.sendspace.com/file/gviky7 pls have and look at the link above and kindly tell me how to draw the bending moment and shear force diagrams.this is in the chapter of statics mechanics thanx

In a molecular orbital diagram that shows the bonding of two electrons (like a diatomic molecule), there are sigma and pi bonds, and the sigma and pi antibonds. Here is an example: http://www.westga.edu/~chem/courses/chem410/410_09/sld024.htm I don't understand how to determine where to put...

I Have A Project To Design And Construct An Active Band Stop Filters I Need Circuit Design Please Thanks

Hi everyone I have a hard time finding complex electrical circuits that high school students solve ...i.e. current, voltage and resistance within the circuit itself. If anyone can kindly find some of these complex electrical circuits to solve over the internet that can be any type series...

Could anyone direct me to a coherent tutorial for drawing simple Feynman diagrams in Latex (I use TeXnicCentre) using the Feynmf package? The only ones I've found are rather complicated, given that I don't have a huge deal of experience with the writing of lengthy 'tex. Cheers, guys. [If this...