Loops Definition and 275 Threads

Does anyone have any ideas? Marcus, do you have?

Homework Statement A circuit composed of one battery and four resistors is arranged as shown in the attached pic. E = 19 V R1 = 12 W R2 = 2 W R3 = 15 W R4 = 2 W Calculate the current I1 through R1? Homework Equations V=IR (obviously) The Attempt at a...

Hi I'm a new user in Comsol and Matlab and I have to create boxes within a box. Of course those boxes are easy, my problem is how do you make loops in MATLAB that translates to the g1=rect2(blah blah) g2=rect2(blah blah).. For example: The boxes within the outside box varies so it's better...

matlab matrix selection of data using for loops and if statements,,,,, Hi people I was wondering if someone could assist me with the following; You received the following data values from a coworker: data = [-1.2, 3.3, 5.1, 0.2, 2.9, -0.1]; It turns out that the sensor used to collect...

This problem deals with current and the magnetic fields of these wire loops & straight wires. The question is listed below, as is the link to the picture. Thanks SO Much for your help! http://i597.photobucket.com/albums/tt59/JMoore4116/PHY232--Ch31--5-4.jpg If that one doesn't work, try...

Hie all Can anyone please help me with this problem I need to vectorize the following MATLAB code : for c=1:3 h = randn(3,3) + j * randn(3,3); z( :, :,c) = h; end Im basically trying to create a 3-D matrix - which has 3 , 2-D matrices (these matrices contain radomly generated complex...

Homework Statement A long, straight wire carries a current of 14 A. Next to the wire is a square loop with sides 1.0m in length. The loop carries a current of 2.5A in the same direction as the wire. Calculate the net force acting on the wire. Homework Equations Magnetic Field for...

I'm only stuck at the very end of this quesstion but ill wirte out the whole thing anyway. Two tiny wire loops, with (vector) areas \vec{A_1},\vec{A_2} respectively are separated by a p[osition vector \vec{r} with r^2>>A_1,A_2 a) Treating the loops as magnetic dipoles, find their mutual...

Could someone please tell me how to make the following code in MATLAB more efficient? I am particularly keen to remove the for loop, as I understand that vectorizing the loop makes the program run much faster. Here ret and len are positive integers and pm is a number between 0 and 1. X is a...

I set this circuit up in my physics lab and measure all the required voltages, currents and resistors. I have been ask to prove that Kirchhoff's Voltage Rule is valid by applying it to all 7 loops. I am only able to find 3 loops and I am unsure as to where the other 4 are. I found 4 other...

I'm doing some experiments, and I need to measure the current (and/or voltage) going through several loops of wire as a magnet slides through. The magnet slides parallel under the loops at a certain speed. I have a multimeter and an ammeter. The problem with the ammeter is that it's just a...

I have a very simple question, but have been unable to find an answer for it. When using fortran 90 can you use a DO loop to calculate a complex number? For example: [code] COMPLEX FUNCTION forwards (tincdum,tstartdum,tenddum,fdum,ydum,idum,wdum&...

Homework Statement A roller coaster begins with a steep downhill descent followed by a vertical loop. How much higher does the initial hill have to be to than the height of the loop so that the riders experience a force of 1G keeping them in their seats at the top of the loop? Assume that...

So, what are the theories' predictions which are going to be tested on LHC? And if they won't be found, Does it mean they will be refuted or not?

Homework Statement Write a program that will roll a pair of six-sided dice (int variables named redDie and blueDie) and will give you 5 points every time you roll doubles (pair of 2s, 3s, 4s, and 5s) and 10 points if you roll snake-eyes (pair of 1s) or boxcars (pair of 6s). Run your program...

Homework Statement The figures below show two different situations where a current may be induced in a loop according to Faraday's Law, with the direction given by Lenz' Law. The magnetic field is shown by the x's in Fig. 2. Select ALL correct answers (i.e. B, AC, BCD) for the current in the...

Homework Statement show that the forces between two current loops obey Newtons 3rd law. Homework Equations \textbf{F}_{12}=\frac{\mu I_{1}I_{2}}{4 \pi s^{2}} d\textbf{r}_{1}\times(d\textbf{r}_{2}\times \textbf{s}) s is the distance between the elements of current The Attempt at a Solution...

The emf given -\frac {d \Phi}{dt} produces a non conservative field right? Then is it right to use Kirchoff's loops rule in the circuit? Also if a coil with self induction L, is kept in a constant magnetic field perpendicular to the plane of the coil, and the flux associated through the coil...

Hello! I'm experimenting with classes in C++. It works fine for now, but there is something I can't find an explanation for. I tried to develop a 'matrix' class, and I overloaded some operators in order to define addition or multiplication for matrices. This works like a charm, except for the...

Homework Statement There is a cross-section wire or radius R with a uniform current density j flowing through it. There is a hole in the wire's cross section (a vacuum) a distance b away from the centre of the cross section. The hole has radius a. What is the magnetic field B in the hole as a...

http://www.fuw.edu.pl/~kostecki/zakopane08/ Last year about this time there was a Zakopane Quantum Gravity School, we got some great pictures reports and comment from Francesca, F-H, Alejandro Satz, and also the main coordinator Richard Kostecki posted some here at PF about it. Zakopane is a...

Homework Statement You have a 1.1-m-long copper wire.You want to make an N-turn current loop that generates a 1.66 mT magnetic field at the center when the current is 1.01 A. You must use the entire wire. What will be the diameter of your coil? Homework Equations The Attempt at a...

Homework Statement In each of two coils the rate of change of the magnetic flux in a single loop is the same. The emf induced in coil 1, which has 200 loops, is 2.67 V. The emf induced in coil 2 is 3.78 V. How many loops does coil 2 have? Homework Equations E=-N(delta Phi/delta t)...

Im curious if anyone knows if it is theoretically possible to place the human mind into an infinite loop in a similar manner to the placing an electronic computer into one. If not, why? What is principle physical/neurological process that prevents this from occurring?

Applying the Biot-Savart eq'n for inside a current loop is pretty simple to find the magnetic field inside a current loop. But how would one find the magnetic field outside of one?

Given the curvature of space-time, are all lines through space also loops? If so, are the loops always circular? If the loops are not always circular, what determines the shape of the loops?

http://www.matmor.unam.mx/eventos/loops07/talks/PL5/Smolin.pdf http://www.matmor.unam.mx/eventos/loops07/talks/PL5/Smolin.mp3 The Loops 07 website continues gradually posting the slides and audio of the talks and several very interesting new ones are now online as of 14 August. I just...

Let be a classical particle with Hamiltonian \pi _{t}-p^{2}-V(x)=0 can we describe the QM version of it (particle under the influence of a potential) using 'Loops' instead of Waves ?? i mean, although this is a toy model can we apply 'Quantum Loops' to solve the problem ??

Alejandro Satz blog has comment on Reuter's Loops '07 talk Also several people have remarked about what Reuter had to say in his lectures at the Zakopane QG school earlier this year. It made a big impression on the grad students there. I have listened to his Loops '07 talk several times while...

http://www.matmor.unam.mx/eventos/loops07/ click on "program"

How can I wind magnetic wire around a half sphere so that I end up with closed loops? How can I wind magnetic wire around a half sphere so that I end up with individual closed loops? There may be a better way to accomplish this so any suggestions would help a great deal. The way I would...

The dates are already set June 30 - July 4, 2008 This time it will be correctly called the Conference on Quantum Geometry and Quantum Gravity---more accurate than just saying "Loops"--- and will be hosted at the University of Nottingham. http://www.maths.nottingham.ac.uk/qg/Meetings.html...

Registration deadline for Loops '07 is coming up deadline for early registration is 25 April late registration in May. Looks like most splendid Loops conference yet (even includes string as a small auxilliary sub-department :smile: See Rozali's talk further down the page) TOPICS COVERED *...

Homework Statement The 10-turn loop of wire shown in the figurelies in a horizontal plane, parallel to a uniform horizontal magnetic field, and carries a 2.0 A current. The loop is free to rotate about a nonmagnetic axle through the center. A 50 g mass hangs from one edge of the loop...

Homework Statement Well the only thing the problem gives is 210 V Homework Equations Q=VC series Q=Q=Q.. V+V=V 1/C=1/C+1/C.. parallel Q+Q+Q.. V=V=V.. C+C+C.. around a loop the voltage is zero. The Attempt at a Solution Now I have no where to begin. I can see three...

Homework Statement Hi. I sort of doubt that anyone will reply to this post since it is a MATLAB problem, but ill give it a shot. I am trying to write a MATLAB function that will graph the logistic map. Homework Equations x(n+1) = r*xn*(1-xn) (1) The inputs are r, x0...

Hey, Im pretty new to c++ so my knowledge is limited. I have been set an assignment to create the following triangles only using Do...While loops. I'm having difficulty trying to code it. The underscores are just their to illustrate spaces. 1 *_________________5 * 5__________* * * * 1 *...

Roller Coaster loops! does anybody know why do roller coasters have more of an oval loop then rounded loop? Thankss

HI I have loops made of 85% platinum and 15% iridium. It brokes down after 3 or 4 steralization cycles (by getting red on Bunsen Burner) please advice reason and solution thanks

I expect this to turn out to be an important non-string QG paper this year. http://arxiv.org/abs/gr-qc/0607014 Particles as Wilson lines of gravitational field L. Freidel, J. Kowalski--Glikman, A. Starodubtsev 19 pages "Since the work of Mac-Dowell-Mansouri it is well known that gravity...

Is it possible to integrate quantum loops into helical quantum loops which might be related to twistor string theory? Wilson lines / loops are common to both quantum loop gravity [QLG] and the various string theories [ST]. As I attempt to understand QLG and ST, I developed some speculative...

Hey guys, Is there anyone good with MATLAB for loops? I am having trouble with getting an embedded loop within another loop to work. I am trying to vary two parameters and create a surface plot with a third variable as the dependant. What I really need help with is how to get the LHS...

As I attempt to understand the conflict between Quantum Loop Gravity [QLG] and the various types of string theory, I noticed that quantum loops appeared to be very similar to Wilson lines, sometimes called Wilson loops. Speculation: relating [QLG] to twistor string theory [TST]. 1 -...

I'm trying to ascertain if there is any "consensus" on the cause of coronal loops in current theory?

i just can't do loops in pascal. the handout we're given doesn't make any sense, so can someone give a quick guide on how to do it?

I need some help. So far I have some for loops that print the following patters: * ** *** **** ***** ****** ******* ******** ********* ********** and ********** ********* ******** ******* ****** ***** **** *** ** * Here is the code: for(int rows=1;rows<=10;rows++) { for(int...

I am sorry to be bothering you - I am a high school student and I need help with something I don't understand. It is understandable if we think of why magnetic fields form closed loops if we think of the North and the South Poles not being separate from each other. This has been given as a proof...

Help - Loops Currents. :( hey there I'm revising for an exam and i can't really do loop currents i was trying to do this sum http://mathonweb.com/help/backgd4.htm (example2) but kept getting the rong sign for equations (for shared resistors):( could someone please explain to me! thanx in...

I've been reading on cosmic strings lately and discovered that if they exist they could pinch themselves off into tiny closed loops that would evaporate via radiating gravitational waves. What would happen if a straight piece of cosmic string could be created? Say, for this question, it's 4...

go here http://loops05.aei.mpg.de/index_files/Programme.html click on whoever's talk you want to hear Rovelli and Smolin have the SLIDES as well as the recorded talk. the slides (either pdf or powerpoint) are quick to download and give a quick idea of what the talk was about---where it fits...