Loop Definition and 1000 Threads

Homework Statement A wire loop of area 2·0×10−4 m2 contains 40 turns, and has a total resistance of 40Ω. The plane of the loop is perpendicular to a uniform magnetic field of magnitude B0. The magnetic field is now turned off such that the flux through the loop drops linearly to zero. A total...

Homework Statement Use a double integral to find the area of one loop of the rose r = cos 3\theta Homework Equations The Attempt at a Solution This is a past test question. The only thing I got wrong was the set up while I got the rest of the mechanical steps right. I set up as...

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 = 52 Ω, R3 = 41 Ω and R4 = 129 Ω. The capacitance is C = 62 μF and the battery voltage is V = 24 V. 1) The switch has been open for a...

Homework Statement A nonuniform magnetic field exerts a net force on a current loop of radius R. The figure shows a magnetic field that is diverging from the end of a bar magnet. The magnetic field B at the position of the current loop makes an angle θ with respect to the vertical, as the...

Hello, Examining the following DO statements and determining how many times each loop will be executed. Assume that all loop index variables are integers. (a) DO irange = -32768, 32767 (b) DO j = 100, 1, -10 (c) DO count = 2, 3, 4 (d) DO index = -4, -7 (e) DO i = -10, 10, 10 The loop will...

I would think this should be an easy one... For i=0 to i=M, I want to run a a calculation and get M different results. I want to store those M results as a vector so I can plot them. Simplify version below: for i=0:10 T = i/2; T end This spits out a list of numbers: 0...

Hi guys, I have been given a problem to complete, but at the moment my progress has been minimal. I have only had two classes on using Matlab since September, thus I am not very experienced. To complete this problem I know I need to use nested For loops but I just don't know where to...

dear users I want to do a triple integration over x ,y ,z in MATLAB but because my expression under the integral is so complicated I want to change integrals to sum by Trapezoid method using a loop in MATLAB but for doing that I have 3 integrals and so 3 for loops for summing over x , y , z...

Hi, I wasn't sure where to post this so I hope it's ok to post my questions here. I would like to learn the basic fundamentals of Loop Quantum Gravity as efficiently as possible. I'm currently 63 years old. I majored in Physics and Chemistry eons ago, and so I'm rusty on everything but...

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 = 22 Ω, R3 = 91 Ω and R4 = 129 Ω. The capacitance is C = 40 μF and the battery voltage is V = 12 V. The positive terminal of the battery...

1. Explain briefly an example of open loop system. At the same time, explain how this example works with the functions of the elements in the system. example is pop up toaster The Attempt at a Solution The pop up toaster can be set for the desireddarkness of the toastedbread. The setting of the...

I just had a question pertaining a circuit that consists of 3 loops in the attached picture: The textbook states that the loop inside with the 50[V] source is independent of the rest of the circuit, but I have a hard time rationalizing it. The only reason I feel it is the case is because the...

Can someone please give me a list of examples of closed loop functions, the only one I know is the equation for a circle y^2 + x^2 = r^2 Also are there any closed loop functions that aren't multi variable, i.e in the form y=f(x) and not z=f(x,y) Is there a way to tell that a function is...

One of the papers on the 4th quarter MIP poll is one which introduced for the first time a new version of LQG which could be important. It directly gives rise to the corresponding LQC application to cosmology. Because instead of first reducing the classical system (say to Bianchi I, a simple...

Hello I am designing single phase inverter with TMS320LF2406 DSP. I created sinusoidal output voltage, and now i want to make regulation. While reading about regulation i found that it is recommended to use outer loop as voltage loop to generate Iref using PI controller, then this Iref...

Hi, I'm trying to calculate the outward force on a loop of wire carrying a current, radially from the center to the perimeter. I found the formula for the force between two parallel wires: http://hyperphysics.phy-astr.gsu.edu/hbase/magnetic/wirfor.html F/L = u0*I1*I2/(2*pi*r) And the...

Homework Statement This is the problem 10.10 in Griffiths' Introduction to Electrodynamics, 3e (See attached image) I am only concerned about finding the retarded vector potential \textbf{A} Homework Equations \textbf{A}(r',t) = \frac{\mu_{0}}{4\pi} \int \frac{...

You have this loop of water (or some other "incompressible" fluid) with a nuclear powered water pump that constantly pumps the water in a circle. This loop is slowly lowered near the event horizon of a black hole, let's even make it a super duper massive black hole to minimize tidal effects...

Hey guys, I have a loop integration of the form below: -i\lambda\int_{-\infty}^{\infty}\frac{d^4k}{(2\pi)^4}\frac{i}{k^2-m^{2}} Where 'k' is the four vector: k=(E,\mathbf{p}) And so this integration could also be represented by expanding out the four vector...

Hey, I was wondering what exactly a loop is of this kind : I understand the initial & final four momentums to be the same and so there is no boundary on the possible allowed momentums in the loop. My professor said the loop is equal to (or can be modeled as) the self-interaction by...

Homework Statement Okay, so I know that I have to find the gain of the negative feedback part (1+ R2/R1). But then to find the transfer function of the bottom part of the oscillator, would the resistor and capacitor that are attached to the '+' terminal of the op amp be considered in...

Homework Statement Find the area of the region bounded by one loop of the lemniscate r2 = a2sin(2θ) with a > 0 using double integration. Homework Equations The Attempt at a Solution I was able to figure out the limits of integration for theta (0 to ∏/2), but what would my...

control system -- open loop transfer function and open loop gain Is there any difference between open loop transfer function and open loop gain ?

Energy, Angular Momentum, Torque, solid ball rolling down loop track? help!? A solid brass ball of mass .280g will roll smoothly along a loop-the-loop track when released from rest along the straight section. The circular loop has radius R = 14.0 cm, and the ball has radius r<<R. (a) What is...

Homework Statement Homework Equations The Attempt at a Solution #include <iostream> #include <cstdlib> using namespace std; using std::cout; int main() { int sum=0; int Array[] = {1,2,3,4,42,5,6}; // int Array[] = {42,1,2,3}; // int Array[] = {12,-10,42,10}; // int...

Homework Statement The closed loop is vertical and the magnetic field is a north and south pole such that the looped end faces the magnetic poles. A multiple choice question answer stated that the closed loop will have a smaller acceleration than 10mls ^2 as it would experience an...

I skipped all of my lectures since I usually like to understand things on my own but I am regretting it for recursion. I don't know why but I am finding it quite unintuitive and confusing. I have an exam coming tomorrow so I have to make sure that I understand it correctly. I know that...

Homework Statement A solid sphere of mass m and radius r rolls without slipping along the track shown below. It starts from rest with the lowest point of the sphere at height h above the bottom of the loop of radius R, much larger than r. (Consider up and to the right to be the positive...

Homework Statement A uniform non-conducting ring of radius 0.816 cm and total charge 6.76 µC rotates with a constant angular speed of 1.73 rad/s around an axis perpendicular to the plane of the ring that passes through its center. What is the magnitude of the magnetic moment of the...

Homework Statement Hello, the problem is in this video. It is displayed near the end starting from 6:19 onward. It's titled "Extra Credit" Homework Equations For Loops and If Statements? The Attempt at a Solution Here is my attempt at the problem: http://www.getcode.me/3sr0mzy7rz1cgrfu

Hello, I am a high school student trying to learn physics out of Kleppner and Kolenkow. Unfortunately, the solutions to some of the problems are not available online, nor is a solutions manual available, so I am unable to find out where I am wrong in some cases, such as this one. I would...

Hi, I'm working on an idea and i need some guidance say i have a wire loop of a single wire (not solenoid) the area of the loop is about 1-2 cm^2 now say i change the area of the loop slightly by about 0.1%-0.01% could i measure with today's electronics this slight change of L thanks in...

I can't generally map Loop Invariant method for proving the correctness of an Algorithm. Take the case of an Insertion Sort http://csnx.groups.allonline.in/pool/Introduction%20to%20Algorithms-Cormen%20Solution.pdf in the above link, at the page 2-3, they have proved the correctness of...

Hey guys, I have an ArrayList<String> al = ArrayList<String>(); and I have a textbox, the textbox allows a user to enter a word and that word will be added into the ArrayList. When I print the list out it looks like this [Cat, Dog, Mouse] can you please write out the for loop that I need...

Homework Statement I have a hill with a roller coaster cart on it and it goes down and around a loop-the-loop the radius of the loop is 10m Diameter=20m What is the minimum speed the cart needs to go to keep it on the track? There is no friction, what is the height of the hill...

3. Consider the motorcyclist riding on the inside of a vertical circle of radius b. His initial speed at the bottom of the circle is u. a) Explain why the three domains (i) u^2 < 2gb, (ii) 5gb > u^2 > 2gb and (iii) u^2 > 5gb are qualitatively different. b) Describe what happens in domain...

Hi, I'm writing a program in fortran that basically creates a loop from 1 until a certain number x (input by the user), and goes through each value between 1 and the certain number x in order to determine if each value meets certain criteria. The criteria is that the sum of the square of the...

Homework Statement Find the potential difference between points a and b. Picture of Circuit involved. Homework Equations V=IR ΔV=Vb-Va The Attempt at a Solution Pretty much completely lost, due to the only one current shown I'm not sure which way the current flows through...

I have asked many times this question to many people and have many different answers: Let X be a widebody jet airliner like an Airbus or Boeing, larger than a typical business jet. Can X do a vertical loop manoeuvre? If X cannot, what is it that stops X?

changing part of a name of a variable in a "for" loop hello everyone! let's say i have the equation between two variables: DT10sec= A*T10sec, working in matlab. How can i use a "for" loop to calculate the equation DT20sec= A*T20sec DT30sec= A*T30sec, DT40sec= A*T40sec,... etc How can i...

Hi.. Speedo, flying in space, is at large speed compared to c relative to his brother on earth. Therefore, after a long time meeting at rest relative to each other, Speedo aged less than did his brother from his brother perspective. But from Speedo's point of view, his brother was also moving...

Dear all, I have a list of pairs say Li={{a,x},{b,y},{c,z}...}. I want to eliminate from this list all pairs that have their second part i.e the x, y, z...>1 and I was thing of using an If loop. Can anyone tell me how please... Thanks...

Hello, I have a few questions regarding machine tool drive and feed back system. Say I have a 1 meter long guide way and a carriage that is driven by DC motor. This carriage glides on air bearings. The drive mechanism has pinch rollers that pinch a drive rod and these rollers are driven by...

I will be attempting to make liquid nitrogen from air. Part of the process involves passing air compressed to 200 atm through a coil and rapidly expanding it. The expanded air that does not form liquid from the rapid cooling will pass back over the condensor coils in a counter-current fashion to...

Homework Statement Question: A ball is launched from a height of 12m. It should land in a pool that has a length of 22m and is 9m away from the wall. Find the minimum and maximum initial velocities for the ball to land in the pool. The ramp is angled at 1 radian such that vy = 0.54v and vx =...

Trying to make a three line loop that would differentiate x2√4x+1 to the nth term starting from the original function (n=0) to the 5th derivative (n=5) and then substitute 2 into the derivatives. Here's what I got f = @(x) x2√4x+1 For n=[0:5] - As the nth term goes from 0 to 5...

Homework Statement A Hertzian dipole at origin generates a signal in empty space which is detected at a wire loop with position vector; r=(50m)ez Homework Equations Signal is detected by changing magnetic field; B(t)=B0 sin(2∏ft)ex Show it is consistent with the Maxwell's solution to a plane...

Hi, I'm a non-expert on LQG, and have a question about it: What is the status of the correspondence principle applied to LQG? I.e., in which sense can we take the classical (h --> 0) or non-relativistic (c --> oo) limit in order to obtain classical GR or Newtonian gravity out of LQG...

For Loop Circuit -- calculate the nth derivative of the signal I'm trying to design a circuit that differentiate a signal using a differentiating amplifier. What I want to do is to calculate the nth derivative of the signal based on a count I specify. How can I apply the same amplifier to the...

Suppose we have a neutral uncharged square current loop, carrying a constant current I. If we boost it in the x direction, x' = \gamma \left( x + \beta t \right) , so that x' increases as t increases (hence the plus sign), what happens to the current? I get that the current density in the y...