Loops Definition and 262 Threads

I am working on a system that requires expansion loops. I have located formulae on engineering toolbox.com and the spirax sarco website for determining the size of the loops required. So a 2m wide loop needs to be 4m tall, and I need one every 17m, roughly. What I struggling to get my head...

Homework Statement One interesting property of a Fibonacci sequence is that the ratio of the values of adjacent members of the sequence approach a number called “the golden ratio” or PHI. Create a program that accepts the first two numbers of a Fibonacci sequence as a user input and then...

Homework Statement The radius of the circular loop is R = 21.2 cm and the wire carries the same electric current I = 19.3 A in all three cases. In the first and in the second case the plane of the circle is parallel to the straight wire segments, in the third case the plane of the circle is...

A cart slides down a frictionless inclined track to a circular loop of radius R = 13 m. In order for the cart to negotiate the loop safely, the normal force acting on the cart at the top of the loop, due to the track, must be at least equal to the cart's weight. (Note: This is different from the...

The Erlangen group just posted 7 papers: a series developing an new canonical approach to LQG more explicitly able to generalize to spatial D > 3, also possibly with some advantage in accommodating matter. Thiemann has been invited to address the Loops conference at Madrid and present the main...

Homework Statement Consider two rectangular loops. An outer and inner loop. Assign outer loop a length a and width b. Assign inner loop length c and width d. Apply a current to the outer loop. Determine an expression for the mutual inductance between the loops. Homework Equations...

Homework Statement Determine an equation to calculate the flux density at the center of a range of current loops encircling each other. Homework Equations The equation for the magnetic flux density at the center of a current loop is mu*I / (2*r) The Attempt at a Solution I...

http://loops11.iem.csic.es/loops11/index.php?option=com_content&view=article&id=75&Itemid=73 The Loops 2011 conference starts in a little over 3 weeks (23 May) in Madrid. On the posted schedule, the titles of the talks link to abstracts. So we can see in more detail what each talk is about...

Hi I'm using the fsolve method to solve for 3 variables in 3 non-linear equations. I would like to find out, how the 3 variables change, when I change a parameter in the 3 equations. Let's assume the parameter runs from 1 to 5 (1:1:5). The iteration looks like this: c=(1:5); for i = 1:5...

Basically, I need to solve a transient heat transfer conduction problem. I've got most of the work done but I need to solve the problem using MATLAB or C++ or some other kind of coding. That's what I need help with. The actual aspects of the problem aren't really that important, so I will try...

Hello, I'm quite new to Wolfram Mathematica and do like the elegance of some parts of the language. However, I think that loop controls are quite different and not very intuitive. Here is a simplified version of what I'm trying to do (now of course done manually): k[1] = {200, 300, 400...

Homework Statement Three wire loops and an observer are positioned as shown in the figure below. From the observer’s point of view, a current I flows anticlockwise in the middle loop as that loop moves towards the observer with a velocity of v ms^-1 Loops A and B remain...

Here's small part of a project I'm working on. The code is not part of the grade. I'm just doing this for my own benefit and I figured that MATLAB can do the plotting automatically for me. Calculate the Mach number at each of the three altitudes for mdotf=.1, .2, .3, .4, .5, .6, .7 The flight...

MatLab "for" loops Homework Statement Write an m-file to evaluate y(x)= x^2 - 3x +2 for all values of x between -1 and 3, in steps of .1 . Do this twice, once with a for loop and once with vectors. Plot the resulting functions. Homework Equations The Attempt at a Solution...

Homework Statement In the circuit below find the current I2 (in A) when R1 = 64 , R2 = 32 , R3 = 243 ; V1 = 86 V, and V2 = 200 V. Be careful about the sign! Homework Equations The Attempt at a Solution I1 = I2 + I3 V1 - I1*R1 - I3*R3 + V2 = 0 V1 - I1*R1 - I2*R2 = 0 V2 - I2*R2 - I3*R3 = 0...

Homework Statement What is the direction of the magnetic field at the center of the two current carrying loops of wire? Homework Equations Right hand rules The Attempt at a Solution I understand that the current from the horizontal wire produces a field going in the upward direction...

1. What causes the algebraic sum of the currents (signs included) flowing into each of the four junctions NOT equal to zero? 2. What causes the algebraic sum of the EMFs in each closed loop NOT equal to the algebraic sum of all the IR drops in each loop?For the first question, I thought that...

i know i haven't understood the concept of eddy current and that is why i am posting this question: why are EDDY currents CIRCULAR (why form a loop in circular form)? please also explain this answer that statement that i found on : http://wiki.answers.com/Q/What_is_an_eddy_current "When...

greetings, what is the meaning of controlled loop and count controlled loop? advanced thanks.

I have recently found a silly problem with Matlab loop try the following simple program : >> clear all >> for s=0:0.1:1 >> V(10*s+1)=s; >> end it will get into trouble when s reaches 0.6 would anybody please check and let me know the result

I'm self studying some alg topology for next semester just working through chapter 0 and 1 of hatcher really. My question is: for any universal cover p of X there are two actions of pi_1(X, x0) on the fiber p^-1(x0) given by lifting loops at x0 and given by restricting deck transformations to...

Homework Statement I am doing Kirchoff's law and i have problems in identifying different loops in a circuit, especially multiple loops. For example, in my attachment for diagram 1, there are 2 loops(ABCFA and ABCDEFA) ? But for diagram 2, the loops are ABCFA and CDEFC?

Hello! I consider myself typically a confident Matlab user. But I have encountered a new problem that I have no idea how to solve, so I'm hoping I can find some help. I have set up a for loop in my code to the effect of for i = 1:n if MyArray(i,1) < some value perform other...

I've been stuck for weeks on a code that I have been generating for image processing. And made an example of what I need. I have this code: (BTW I am new to this MATLAB world) A = [2, 5, 6; 3,6,7]; B = [5, 3, 1; 7,3,2]; for i=1:3 v = genvarname('C', who); eval([v '=...

I am trying to create a code that does the exact same thing as this does #include <iostream> using namespace std; int main() { int len; cout << "Enter a number: "; cin >> len; for (int i = 0; i < len; i++) { for (int j = i+1; j < len; j++) {...

Homework Statement I'm just trying to interpert how the return statement works. bool check(int item, vector<int>& v2) { int i = 0; while (i < v2.size()) { if (item == v2[i]) return true; i++; }return false; } Homework Equations The Attempt at a Solution I'm confused about the return parts of...

Homework Statement Two circular loops of wire, each containing a single turn, have the same radius of 3.6 cm and a common center. The planes of the loops are perpendicular. Each carries a current of 2.0 A. What is the magnitude of the net magnetic field at the common center? I have been...

Building a matrix using "while" loops? (MATLAB) Hello Here is my code: i = 1; j = 1; S = zeros(11,11); while i < 12 while j < 12 S(i,j) = Test1(a(i,j),b(i,j),c(i,j)); j = j + 1; end i = i + 1; end a,b,c are all 11x11 matrices and Test1 is a...

I assume that if one has several current loops that the magnetic fields that they generate just add together linearlly. Just want to make sure.

Hello all, First let me state the following: 1. The programs that I write are not production code. 2. I am not a trained developer. 3. I do not work for a software development company. My question pertains to the use of try catch exception handling vs. using do while loops...

Homework Statement I need to get 2 major loops in my method or hypthesis. My experiment is which of the following factors affects strength of electromagnet the most: number of coils, the voltage of the power source, the diameter of the core, or the thickness of the wire. Can you...

So I'm writing a program for a professor (not for class) for research related with spike triggered averages in neurons. Which involves a lot of data analysis. So basically my code looks like this: for(int i=0; i<SIZE; i++){ Write a lot of things into arrays in memory (although far fewer items...

The Law of Biot and Savart Law tells us how to find a differential form that generates the first de Rham cohomology of S3- embedded loop. Run a steady current through the loop. This form is just the dual of the induced magnetic field (using the Euclidean metric). Ampere's Law tells us...

Homework Statement http://img33.imageshack.us/img33/1147/question1x.jpg Homework Equations V = IR, Sum of currents at junction = 0. The Attempt at a Solution Just doing some exam revision, and found this one in my notes. I'm not really sure how to go about it. Using Kirchhoffs rules, you...

Homework Statement Can someone help me set up a "for loop" for this equation I intialize hc = x0 then I have to compute hc1 = C.*(log(hc./b)+1)+ gamma.*(1-exp(-hc./gamma)) hc2 = C.*(log(hc1./b)+1)+ gamma.*(1-exp(-hc1./gamma)) hc3 = C.*(log(hc2./b)+1)+ gamma.*(1-exp(-hc2./gamma)) hc4...

It is a bit hidden in the page, because you cannot get the links directly from the main page. But an easy guess lead me to this: http://www.mighty-security.com/loop/resource.htm It is now up all audio and video recordings of the conference.

In eqn. (82.37) Srednicki derives for the string tension between two quarks as \tau=\frac{c(g)}{a^2} where c(g)=ln(g^2), 'g' is the coupling, and 'a' is the lattice spacing. He later goes on to say that the string tension should be independent of the lattice spacing 'a', and using this...

Hi There Can anyone check the following algorithm and tell me what I am doing wrong. If every thing is OK then please give me some feedback to make it robust. Please check both the algorithms Algorithm-1 B=gallery('tridiag',10,-6,4,4);n = 10; BL = kron(eye(n),B); [p1,q1] = size(B)...

Hello, I am trying to store the results in the form of an array every time the code goes through a loop. This is what my code looks like: for j = 1:100 for i= 1:100 if S(i)==0 if rand < T S(i)= 1; t_inf(i) = j; end...

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...