Loop Definition and 1000 Threads

For a ferromagnetic material in the hysteresis loop, when increasing field from H=Hc, its magnetization (M) will saturate. But if we decrease field instead, will M decreases clockwise according to the loop? How can we make the ferromagnetic material back into the initial state (H=0, M=0)...

Suppose that I am plotting some data that corresponds to "i" different functions. So on the plot I have "i" number of curves on one plot. Instead of using a legend, I would like to label the y-axis x mark that corresponds to the function. I can do this using the set gca tick label function...

Hi, I am running FindRoot on three variable system of three non-linear equations for a variety of parameters (four) and a huge range of parameter values. A simplified example is as follows: one parameter and one variable: I want to solve the equation f(x,a)==0, where 'x' is the variable...

Abhay Ashtekar has just posted a surehanded insightful survey of the main approaches to QG, focusing on current Loop hamiltonian and spinfoam developments. The first 8 or 9 pages give historical perspective. The next section gives a pedagogical introduction which will serve well the needs of...

Homework Statement A bar magnet is dropped through a horizontal coil as shown below. An EMF is induced in the coil with the resultant voltage shown on the graph. Explain the shape of the graph, in particular the differences in the regions marked as A, B and C. Homework Equations...

Hey everyone. Having a bit of trouble with a 4-part question. So I thought I'd post here, if someone could check the first 3 parts and perhaps help me with the last part, I'd really appreciate any feedback! Thank you so much! :) Homework Statement a) A circular loop is held to the left of a...

I'm have a really hard time understanding for loops in matlab. How can I solve y=x^3+1 with a for loop?

hi, i am facing some problem in my for loop or ifesle statement in matlab. i used a for loop to load the images from a folder, after the images loaded, it will gone through some calculation to get the average. if the images average <=10, then i want to display the images name in a listbox. let...

Hi all, I have the following code which runs without error but gives no output. It's probably simple but I just can't see the problem. [FONT="Times New Roman"]LM={}; M[line_, cur_, lq_, ld_, k_] := For [i = 1, Length[line[[1]]], i++, Module[{m}, If[line[[1, i]] == "Q", m =...

I tried to write this program but the loop just won't run, am I missing something ? import java.io.*; import java.util.*; public class basicswitch { private static void main(String [] args)throws IOException { int a ,b,y, x = 0; double c = 0; BufferedReader in; in = new...

Homework Statement Hi, I am trying to use pspice student to work out a ideal opamp. This is what i did: Homework Equations I have find out the gain for my opamp using simulation. But the problem is how can i find out the DC open loop gain using this software? i have google it and it just...

Problems integrating in a "for" loop in Matlab My problem strikes me as embarrassingly simple, so hopefully someone can set me straight with ease. I'm writing a Matlab code in which I'll be wanting to do a good amount of integrating of products of various eigenfunctions. Presently, I'm just...

Problems integrating in a "for" loop in Matlab My problem strikes me as embarrassingly simple, so hopefully someone can set me straight with ease. I'm writing a Matlab code in which I'll be wanting to do a good amount of integrating of products of various eigenfunctions. Presently, I'm just...

Homework Statement this comes from griffiths 7.46/11 A square wire loop is placed so that its top portion is in a uniform magnetic field. It is then allowed to fall under gravity. We then repeat this experiment but instead rotate the loop 45° so that it is a diamond. Which orientation...

How do I go about building a simple antenna to measure 25MHz to 100 MHz radiated emissions? I have an oscillator in my ckt that's radiating at 75MHz. Just want to make sure it's the 3rd harmonic of fundamental frequency (25MHz).

Homework Statement Given a rectangular loop of length C by length D (C >> D) through which a current I flows, calculate the self-inductance L of the loop (consider only the long sides of the rectangle). Homework Equations Self-inductance: L = \frac{N \cdot \Phi_B}{I} magnetic flux: \Phi_B =...

Hey all, I'm very new to Mathematica, so I'm looking for some help here. I'm writing an elementary program using a "For" loop, and getting this error message: "Sum::write: Tag Plus in i-1 is Protected. >>" Any ideas what might be wrong? Thanks!

I've uploaded my attempted solution here. The problem I'm having is highlighted at the bottom in red. The issue I'm having is expressing the direction of H. I realize the cancellation that occurs at point (0,0,z), where the only the z-component of the H-field remains. I also realize that my...

Help me here. I need to figure out how to launch a marble so it navigates a vertical loop, then follows projectile motion at the end of the loop The design must use elastic potential energy to do this and must consistantly launch it consistantly to a specifyied location. I can't figure...

This was a question from my C++ midterm. I see an infinite loop, but the correct answer is 12. Can anyone explain this? Question: What is the value of i after the loop exits? int i; for(i=0; i < 10; i++) i+=3; i=1;

Homework Statement See figure attached. Homework Equations The Attempt at a Solution I'm having some confusion about the negative sign within this problem. If you compute the curl of the expression shown in the figure you'll find that it's equal to, -10v_{0} \hat{k} But...

Homework Statement I need to construct the Feynman loop integral for the following diagram: (*) where \nuL is the left-handed neutrino, \phi is a scalar particle and N is a heavy neutrino with a Majorana mass. Homework Equations N/A The Attempt at a Solution I'm trying to determine it...

Need to interrupt a low voltage lighting "loop" circuit I configure a lot of low voltage lighting for a living. Although it's not a deal-breaker for the project I'm working on, I'm having a disagreement with a colleague as to whether the following configuration should work: Shapeable...

Homework Statement Adjust a program loop so frequency will change linearly with a keyboard increment or decrement. The current calculation adjusts about 40 counts in the delay loop but when the frequency gets high the step is frequency is very large with each decrement in the loop. A...

Was sitting in class thinking about this problem, did some rough sketches of a solution but never really managed to solve it. ![Ice cream cone and a loop-de-loop][1] The problem boiled down to finding out how much time the boy uses getting from the top of the loop to the bottom. Any...

can the PLL achieve phase lock and not frequency lock? and can the PLL achieve frequency lock and not phase lock? Please advise. Thank You

Hello everyone! I just start using C programming as i execute a numerical method in MATlab for a heat diffusion problem. I have solve my problem but my code can be a little better. HERE is part of my code and i use comments to ask for help! for i=2:10 E(i,1)=20; T(i,1)=1...

Kirchhoff's Loop Rule: The directed sum of the electrical potential differences (voltage) around any closed circuit is zero. I'm an electron. I'm in a single loop series circuit with just a 5 volt battery and a resistor. The battery gives me a voltage boost of 5 volts and sends me on my way...

Homework Statement A wire Loop R with a current I=10A running through it, is distance d above an infinite plane of iron with mu=5mu_0 R=2d. Find the force on the loop Homework Equations I would assume you could use image currents in the plane of iron to solve this The Attempt at a...

Homework Statement A square loop with sides l is centered on the origin and fixed in the center so it is free to rotate around the x-axis. A magnetic field is changing with time B=B_0(1-exp(-a*t)). I need to find a differential equation to describe the motion of the rotating loop...

I am editing code which was developed to model a mass spring damper system in the time domain using the equations of motion of the system. One damping ratio in particular,cpto, was constant originally but I am trying to vary it according to the if statement below. if k3*(x2(i)-x1(i))>=0 &&...

They say that if quantum entanglement were meditated by actually superluminal exchange, causality is not violated because you can't use it to send information. This is because quantum randomness can't be control. But note there is still actual exchange of randomness information between past and...

Homework Statement The rollercoaster moves freely without negligible friction. The radius of the loop is 20m and the car barely makes it through the loop. Find the speed at position 3. Find the speed at position 1 and 2. Find the difference in height between position 1 and 4 if the speed...

Homework Statement The current loop is in the y-z plane. The direction of the magnetic field is in the z-direction. A) Which way is the torque on the current loop? B) If the current is 4 amps and the magnetic field strength is 2.5 Tesla, what is the magnitude of the torque? here is the...

Homework Statement The wire shown is being pulled through a constant magnetic field of 0.25 Tesla at 3 m/s. A) Find the power required to pull the loop at this speed. B) If the wire has a resistance of 100 ohms, what is the current in the wire? Homework Equations The Attempt at...

A small object goes down a ramp and through a loop with a 2 metre diameter. In order to complete the loop, what is the minimum speed the object must have when reaching the bottom of the ramp? (consider there is no friction) a) 5 m/s b) 0 m/s c) 3 m/s d) 7 m/s I'm a bit clueless on...

Recently, I am very interested in Loop Quantum Gravity. But I hope I can know more about the recent development of Loop Quantum Gravity. I mean the development from 2000 to 2011. Any conceptual or practical or technical development in this realm? Further more, I do not know the relationship...

Homework Statement A roller-coaster car starts from rest at a high point 2 times as high as the top of the loop-the-loop. When it is just about to enter the loop from the bottom, a 100 lb bag of bricks fall on the car, causing it to lose 25% of its speed. Neglecting friction, do you think the...

Homework Statement Homework Equations I know this is supposed to use Lenz's law, but I don't really understand it V=IR The Attempt at a Solution I calculated the resistance of the circuit to be 6.4e-6 / .0015 = 0.00426666667, but that's as far as i know what to do

Homework Statement I need to create a loop that asks the user to input double numbers into an array. The number of elements in the array is not predefined; the user will continue to enter numbers as long as they wish until a NEGATIVE number is entered, at which point the control will exit...

Homework Statement 12. A motorcycle travels around a vertical 12 m radius loop. What is its speed at the top of the loop if the normal force exerted by the seat on the driver is equal to ¼ of his weight? a. 7 m/s b. 8.1 m/s *c. 9.4 m/s d. 15 m/s e. 88 m/s Homework Equations...

here is import java.util.*; public class oddNumbers { public static void main(String[] args){ System.out.println("enter two number"); Scanner kb=new Scanner(System .in); int number=kb.nextInt(); int number2=kb.nextInt(); int s=number2/2; String decision...

I would like to continue discussing SF (i.e. PI) models of LQG based on chapter 3 from http://arxiv.org/abs/1009.4475 Critical Overview of Loops and Foams Authors: Sergei Alexandrov, Philippe Roche (Submitted on 22 Sep 2010) Abstract: This is a review of the present status of loop and...

I would like to continue discussing canonical LQG based on chapter 2 from http://arxiv.org/abs/1009.4475 Critical Overview of Loops and Foams Authors: Sergei Alexandrov, Philippe Roche (Submitted on 22 Sep 2010) Abstract: This is a review of the present status of loop and spin foam...

Homework Statement I recently got a problem that confuses for days, the picture for this problem is in the attachment field, is there someone can tell me that, if an oscillator is topology is described using the negative impedance model in the picture, should I have R>r to ensure that the...

Some new research has emerged as a potential challenge to the main Loop version of quantum geometry/gravity. We may disagree as to which new work presents the most interesting challenge, I want to know what you think. I personally think that the Freidel Geiller Ziprick (FGZ) paper that just...

Homework Statement http://pastebin.com/7ehbwkvE expires in 1 month... the problem statement is very vague... we are given this code of an infinite loop, and need to fix the problem that it poses by either using a correct while loop or a for loop. Homework Equations The Attempt at a...

Homework Statement [PLAIN]http://img856.imageshack.us/img856/8508/circuit.png Homework Equations Loop Analysis and Node Analysis The Attempt at a Solution The Question states I have to find the equivalent resistance within the circuit. But, since there is a dependent source...

Homework Statement As shown in the figure below, a circular loop of radius a = 0.1 m lies in the horizontal x-y plane with its center located at the origin, with steady current I = 2.0 A circulating in a counter-clockwise direction in the loop. The magnetic field strength B(0,0,z) at the...

Homework Statement Consider a long wire running in the vertical direction with a rectangular loop of wire beside it as shown. Now suppose that a constant current, I, flows upward along the long wire, and the same magnitude current, I, flows clockwise in the loop. As viewed from the top...