Loop Definition and 1000 Threads

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 A triangular loop of side length a carries a current I. If this loop is placed a distance d away from a very long straight wire carrying a current I', determine the force on the loop. See attachment for diagram. Homework Equations F=(\muII'/2\pir)L F=I'LB...

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...

More precisely, my question is, Is the wilson loop used to calculate the heavy quark potential always positive in the lattice simulation? (i) as we are usually told, wilson loops of the following form are related with the heavy quark potentials ......... _________ <WC_______... |......|../\ ...

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 An electron moves in a circle of radius r = 5.29 x 10^-11 m with speed 2.19 x 10^6 m/s. Treat the circular path as a current loop with a constant current equal to the ratio of the electron's charge magnitude to the period of the motion. If the circle lies in a uniform...

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...

Hi My lecturer was talking about hook and loop fasteners in class the other day and since then I have done some basic back round information on it (who discovered it) but what I want to ask you is how are the hook and loop fasteners made with nylon? I know the hooks are created under an...

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...

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. LM={}; M[line_, cur_, lq_, ld_, k_] := For [i = 1, Length[line[[1]]], i++, Module[{m}, If[line[[1, i]] == "Q", m = {{Cos[k*Sqrt[Abs[cur]]*lq]...

I was reasoning about this matter and i found myself asking a question ... i tried to search the answer in quite a number of books (mainly Physics_For_Scientists_And_Engineers_6_Ed._By_Serway_And_Jewett and and Physics_by_James_S_Walker) but no way ... all the information i found are related to...

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!