Loop Definition and 1000 Threads

Long story short I have an integral which is something like this: (in Mathematica code) Integrate[1/{(1 - b^2)*{((1 - y)*z + y)^2 + (1 - y)^2*(1 - z)^2} + 2*(b^2 + 1)*{(1 - y)*(1 - z)*((1 - y)*z + y)}}, {y, 0, 1} ] Written without assumptions. b is actually only in [0,1] and I think I...

[SOLVED] Rotating Square Loop in Constant B-field Homework Statement Homework Equations \epsilon = - \frac{d\Phi}{dt} \Phi = BAcos(\theta) = BAcos(\omegat) d\Phi = -BA\omegasin(\omegat) The Attempt at a Solution I'm trying to study for an exam and I've got this practice...

I am supposed to read from 2 text files containing numbers in ascending order, then output the all the numbers in ascending order to an output file, For some reason my output file is reaching an infinite loop it orders the numbers correctly but the last number reapeats forever. I am thinking it...

There is a natural way to formulate Loop quantum geometry as the dynamics of line defects in a flat vacuum. Just under 2 months ago, I attended a 90 minute seminar talk on this at the UC Berkeley physics department. Unfortunately that talk is not online, but we do have an earlier talk given last...

Hi I am attempting to calculate the mass of the W boson according to one loop energies using the equation, Mw2=(πα/GF√2)/sin2θw(1-Δr) where (Δr)top=(3GFMt2)/8√2π2tan2θw using values:- α=α(MZ)=(127.916)-1 GF=1.16634×10-5 sin2θw=0.23116 =>...

Lenz law problem wire and expanding loop Homework Statement The loop has current radius R the red bar moves at velocity V. The distance the wire is from the loop is d and the top of the loop is length l Find the induced emf and the direction of the current in the loop. Homework Equations...

Homework Statement electromagnetic field Homework Equations E=hv The Attempt at a Solution I know that t is the variable and h1 and h2 I and I2 are considered given all we are doing is doing the algebra set up but not sure how to show this exactly.?

Homework Statement THe problem is number 3 in the picture. Homework Equations The Attempt at a Solution Lens law changing magnetic flux through the loop not sure which way for each one little confused. Thank you

Homework Statement Imagine a pliable round metal loop that can expand or contract. In a region with a constant magnetic field B0 that is oriented perpendicular to the plane of the loop, suppose that the loop expands, with its radius growing with time as r = r0(1+at2). As the loop expands and...

Homework Statement 1. Find the current in each resistor and voltage at point Vx Homework Equations Using Kirchoff's rule and system of equation I found currents but I am not quite sure how to calculate voltage at point Vx. I am pretty sure I got the currents right. Is it Vx =...

Homework Statement A 0.69m long and 0.69m wide loop is moved at a constant velocity of 0.81m/s from a region of zero magentic field into a perpendicular constant magnetic field of 0.21T. Calculate the magnitude of the induced voltage in the loop while it is entering the B-field Homework...

Homework Statement I've obtained the node equations that's in the matrix for rows 1, 2, and 4. I got 3 as well but I'm not sure if my analysis was correct. http://img252.imageshack.us/img252/3151/nodeq.jpg The Attempt at a Solution http://img684.imageshack.us/img684/9803/dsc0010van.jpg So...

Homework Statement A circular loop in the XY plane of radius R and with current I moving in the counterclockwise direction. Compute B at (L,0,0) for L >> R0. Homework Equations Biot–Savart law dB= μ0I/4∏ *(dl X r)/r^2 The Attempt at a Solution I know that the B on the axis...

Homework Statement Which describes the magnetic flux through a section of a loop? A. It is a vector that is directed outward through the section. B. It is a vector that is directed inward through the section. C It is a vector that is tangent to the section. D. It is a scalar...

1. A small current loop of area A=0.0007m2 and moment of inertia I=6.6e-07kgm2 carries a current i=0.0045A with its magnetic moment perpendicular to the Earth's magnetic field. The magnitude of the Earth's field is B=4.2e-05T. What is the magnitude of the net torque T on the loop? Homework...

1. An infinite straight wire on the z-axis carries current I2=3.6A in the +z direction, upward. A rectangular loop is placed in the xz plane with its nearest side parallel to the wire a distance d=0.9m away. The loop has height (z-length) h=1.5m, width (x-length) w=1m, and carries a current...

Energy Dissipated in Loop (Magnetic Field)-- Please Help! Homework Statement What is the energy dissipated as a function of time in a circular loop of N turns of wire having a radius of r and a resistance of R if the plane of the loop is perpendicular to a magnetic field given by...

Homework Statement A square loop, with sides of length L, carries current i. Find the magnitude of the magnetic field from the loop at the center of the loop, as a function of i and L. Homework Equations B=μ0/4∏∫i * dl X r^ /r^2 The Attempt at a Solution

Homework Statement A current-carrying circular loop of radius R is placed next to a long straight wire, as shown in the diagram below. The current in the straight wire points to the right and is of magnitude 3 A. see diagram...

Magnetic Force on Various Sides of Spinning Loop?? Homework Statement A horizontal uniform magnetic field of magnitude 0.4 T is oriented at an angle of = 65° relative to a line perpendicular to plane of a vertical, rectangular loop, as indicated in the figure. The loop has a height of 8 cm...

Homework Statement (see attached file) Homework Equations (see attached file) The Attempt at a Solution isbn=input('Enter 9 Letter ISBN number: ','s'); for i=1:1:length(isbn) (%indent)num=str2num(cat); (%indent)check=num*i %somewhere in...

Homework Statement A rectangular loop of wire with dimensions 2.32 by 7.91 and resistance 0.557 is being pulled to the right out of a region of uniform magnetic field. The magnetic field has magnitude 3.01 and is directed into the plane of the following figure . At the instant when the...

Homework Statement A block moves on the frictionless slide shown in the diagram. What is the minimum height from which the block can be released if it is to complete the loop without leaving the surface of the slide? (Assume that the dimensions of the block are small compared to R, and that...

Homework Statement What hysteresis loop shape would you require for a magnetic material to be used in A) a permanent magnet B) transformer core The Attempt at a Solution No idea what this means...but it is for my lab tomorrow so I probably should. Any help would be greatly...

Homework Statement What is the force acting on a magnetic dipole that falls through a loop of wire? Any sort of answer, exact, approximate or a reference to a source that covers this would be excellent. I haven't been able to find much of anything on this problem. Homework Equations The...

I hope you don't mind if I'm a little liberal in your cute format. I'm looking for why method 1 does not equal method 2. 1. Homework Statement : Method 1--the "cute math" method. Alright, so... I have a circular loop of radius A, let's place it in the xy plane, with a steady current I...

Which do you think are the main quantum geometry (QG) lines recently appearing to rival Loop? Do any look especially promising to you? Any favorites? Here are some to consider. The authors shown aren't a complete list! Just enough for an arxiv search: [Colored] tensor models (e.g. Gurau, Ryan...

Homework Statement https://fbcdn-sphotos-a.akamaihd.net/hphotos-ak-prn1/553004_1959186995753_1725123128_934768_456680196_n.jpg In case the words are too small: I2= 6.61I1 The net magnetic field at center of loop is 0. I'm looking for the radius of the loop Homework Equations for...

Hi, I'm having trouble getting a loop invariant expression for this algorithm: Majority(A): c = 1 m = A[0] for i = 1 to len(A) - 1: if c == 0: m = A[i] c = 1 else if A[i] == m: c = c + 1 else: c = c - 1 return...

Homework Statement A rectangular loop with dimensions 4.2 cm by 9.5 carries current I. The current in the loop produces a magnetic field at the center of the loop that has magnitude 5.60×10−5 T and direction away from you as you view the plane of the loop.Homework Equations...

I have been tardy in realizing the interest/significance of some 2011 and 2012 papers co-authored by Valentin Bonzom with various people (Alok Laddha, Rivasseau, Livine, Gurau, Smerlak,...). Maybe some others here have been more alert and seen this already. I simply want to rectify the...

Homework Statement The small mass m sliding without friction along the looped track shown in the figure is to remain on the track at all times, even at the very top of the loop of radius r. http://session.masteringphysics.com/problemAsset/1057653/6/GIANCOLI.ch08.p090.jpg A)In terms of...

Homework Statement The problem is shown in the link below: http://postimage.org/image/do2b7xz0b/ Homework Equations Biot-Savart Law's and dF=Idl x B The Attempt at a Solution My attempt is really just a mess. I essentially want to break it up into 2 segments. (1) Being the...

for(k=0;k<10;k++) { c+=shift; dedispersion(c, displacement, fbk, result); Here, if I use "c=shift", the program runs well but the c will not change. If I keep the code like the above, then it can be compiled and linked but it will be closed when running. I am not able to change the...

How do you understand about Gravitons in Loop Quantum Gravity? All I know about it is from what I heard that "LQG hopes that its predictions for experiments occurring far below the Planck scale will be almost identical to that of gravitons on flat spacetime". So do you consider it a pure...

Find the area of the loop of the curve y^2=x^3(1-x)^2 using integral calculus. y=√x^3(1-x)^2 y=√x^3/2 (1-x) To sketch the curve, I assigned values for x and then solved the corresponding values of y. x= -1, y= -2 x= -0.5, y= -0.53 x=0, y= 0 x= 0.5, y= 0.177 x=1, y=0 how can i...

Hello all. I have a platform that is controlled by two electric motors (one for elevation, one for rotation). During the application, I would like to have the platform maintain it's current position. I'm imagining a system where you set the position manually, and then press a button that...

How fast must a plan fly in a loop-de-loop if the pilot experiences no force from either the seat or the safety belt when he is at the top of the loop? I just need to be pointed in the right direction. Thanks in advance for your help.

Homework Statement Answer the following with regard to the current loop shown in the figure. http://i.imgur.com/Lkp4D.gif TRUE OR FALSE: The B Field at C points into the plane of the paper. If an external magnetic field directed out of the plane of the paper were introduced, the torque on...

Homework Statement A very strong magnet is suspended by a non-magnetic thread. A student forms a loop out of a wire attached to the Pasco 750 Interface as shown on the left. During a half second interval, the student moves the wire loop until it is below the magnet as show a) Describe...

Homework Statement A single conducting loop of wire has an area of 8.0×10−2 m^2 and a resistance of 110 Ω. Perpendicular to the plane of the loop is a magnetic field of strength 0.37 T. At what rate (in T/s) must this field change if the induced current in the loop is to be 0.33 A...

Homework Statement A circuit is constructed with four resistors, one capacitor, one battery and a switch as shown. The values for the resistors are: R1 = R2 = 49 Ω, R3 = 64 Ω and R4 = 64 Ω. The capacitance is C = 88 μF and the battery voltage is V = 24 V. The switch has been open for a...

Recently I read about Saab's experiments at closed loop spark advance, and it got me wondering. If you are controlling spark advance to maintain a constant peak pressure position of 20 deg after TDC is it possible to get into a situation where detonation or pre-ignition is possible. It seems to...

Thought experiment. Imagine building two optical mirrors around the sun an astrophysical body of the right mass, lined and diametrically opposed, at the right distance so that the sun is acting as a gravitational lens. Mirror A reflects the light from any extrasolar object and directs...

I posted this in number theory "Ramsey Primes" but I don't think this qualifies as an improper use of this forum. I need help with my code. My code for Mathematical is short so I will include it below for reference. There are some flaws. For instance the Reap/Sow function generates a list of the...

Good Day All, I would like to know if anyone can help with the following; I am running it a few problems and I am not able to find the formulas that will allow me to prove my idea. I have a loop of 20 Gauge magnet wire; it's 24 inches by 2 inches. I'm using this as a detector, but i want to...

"Capacitor loop with no resistance" ? In Circuit Simulator at http://falstad.com/circuit/ I created a circuit attached below which refuses to run because "capacitor loop with no resistance". To me it seems that there is no problem with this circuit and that the two capacitors will simply act as...

At the top of a "frictionless" loop that is 75 cm high, a 75 Kg ball bearing is traveling at 1.9m/s. From what height was the ball released? I have absolutely no Idea where to start here. Diameter= 0.075m Velocity=1.9m/s Force related to Gravity=0.74N m=0.075Kg

Homework Statement a single loop of wire with radius A is rotating in a uniform magnetic field at angular frequency ω. The loop of wire drives a current through a resistor R. Determine the torque as a function of time needed to turn the wire. Homework Equations 1) Emf = ∫Fmag.dl...

Say we have a roller coaster, and we want to calculate the speed the roller coaster can go at barely making the loop. Normally, the equation would be n+w=m*v^2/r, but why do we set normal equal to zero when we're solving for the minimum speed? Where does the normal come from on top of the roller...