Computing Definition and 683 Threads

Hey guys. I'm sure some of you are aware of how to analytically integrate e^(-x^2) dx from - infinity to infinity using polar coordinates. I have taken that logic and showed that the integral of the normal distribution( not necessarily standard) integrates to 1 over the entire domain...

My linear algebra textbook presents a technique for computing the transition matrix from an old basis B' to a new basis B. Apparently if you set up an augmented matrix with B on the left and B' on the right, then put B into RREF, the resulting matrix on the right after those row operations will...

I need to compute the yield point for an experimental true stress vs true strain plot of a material as attached in the screenshot. See attached; I have true stress vs true strain plot. I took some initial points on the curve and fitted a straight line which gives me the elastic part of the...

I'm having a hard time assessing the reality of job prospects in quantum computing research. The research seems mostly limited to schools I wouldn't dream of getting into and the companies pursing the technology seem limited as well. I'm currently undeclared and taking the basic math...

Homework Statement Question: "Given that the surface x^4 * y^7 + y^6 * z^8 + z^7 * x^9 + 4xyz = 7 has the equation z = f(x,y) in a neighborhood of the point (1,1,1) with f(x,y) differentiable, find the derivatives. Find: a) ∂f/∂x(1,1) b) ∂f/∂y(1,1) c) ∂^2 f/∂x^2" Answers...

Homework Statement Problem H-10. We will compute the mean of the geometric distribution. (Note: It's also possible to compute E(X^2) and then Var(X) = E(X^2)−(E(X))^2 by steps similar to these.) (a) Show that E(X) = (k=1 to infinity summation symbol) (k
*q^k−1*
p) where q = 1−p. (b)...

Homework Statement The problem says to compute the expression shown for the permutations σ, τ, and μ. My problem in particular says to compute |{σ}| for σ= (1 2 3 4 5 6; 3 1 4 5 6 2) The Attempt at a Solution My attempt to solve this problem was by first trying to change σ into σ^2...

Hi there I am working through a quantum gate section of my course and I am a bit puzzled on how to calculate a matrix for consecutive quantum gates. I understand how to generate a matrix for |q0⟩--------[H]------- |q1⟩------------------ Which is simply the tensor product of the hadamard...

Hi, In my fluids work I have come to integrals of the type: \int_{0}^{\infty}\frac{e^{ikx}}{ak^{2}+bk+c}dk I was thinking of evaluating this via residue calculus but I can't think of the right contour, any suggestions? Mat

Homework Statement An alloy steel shaft has an outside diameter of 100 mm. A central hole of 60 mm diameter is bored in part of its length as shown. Compute the shearing stress in the hollow section if the stress in the solid section is 200 MPa. Homework Equations angle = TL/GJ t = torque L...

Homework Statement If the scalar electric potential v in some region is given in cylindrical coordinates by [SIZE="4"] v (r, \phi, z) = r^2 sin \phi e^{\frac{-3}{z}} , what is the electric field \vec{E} in that region? Homework Equations E = -\nabla v The Attempt at a Solution...

Homework Statement Find the magnitude and direction of the magnetic force on a charged particle with charge -4nC and velocity \vec{v} = (2.5\times 10^{4}) \hat{i} + (1.1 \times 10^{4}) \hat{j} (m/s) if the magnetic field in the region is given by \vec{B} = (1.2\times...

Homework Statement Find the length of the polar curve. Complete the cardioid r=1+cosθHomework Equations L=∫αβ√[f(θ)2+f'(θ)2] dθ The Attempt at a Solution Given f(θ)2 is equal to cos2θ+2cosθ+1 and f'(θ)2=sin2θ I arrive at the integral ∫αβ√[2cosθ+2] dθ which I cannot for the life of me...

Physics Help Computing Force Homework Statement Two insulated balls with a mass of 0.8g each are suspended on 25 cm threads from the same point on the ceiling. Each ball has a equal positive charge. The angle formed between the two threads is 36 degrees. What is the charge on each ball...

Computing the period of a meteor using two ways. I'm looking at code that computes the orbit found for a meteor. It computes the period of the meteor as: a = 13.07 # semi-major axis in AU P = m.sqrt(a*a*a) # From the program which yields P = 47.2512586393 Years If I use the...

I have to decide on what subjects I want to continue on for A level and was just wondering what I should pick as my last slot. I want to do Electrical Engineering at uni when I leave school. I'm really interested in either really big applications of EE like large HV plant stuff but also I'm...

Homework Statement integrate 4e^(2x)^(1/2) - 1/7e^(-pix) using a guess and check method (haven't learned many rules of integration) Homework Equations The Attempt at a Solution i'm not really sure how to do this integral... i tried 4/(2x)^(1/2)[e^(2x)^(1/2)] using a table of...

Is it possible to compute the Galois Group of a polynomial manually (without a computer)? If so, can someone please explain how? I can't seem to find any information (aside from computer algorithms) on how to find a Galois Group or how to factor a polynomial modulo a prime. If it helps to...

I wrote a game with a rocket that orbits a planet, and you can change the orbit with thrusters. As part of it I draw the predicted orbit for the rocket. To do this I compute the eccentricity vector, then the eccentricity e, then the major and minor axis of the ellipse or hyperbola as...

What of importance of superposition in quantum computing? What I understood is we have two states |0> and |1> which represent logical 0 and 1 . So the mixed state can be given by the combination of logical operators like OR, AND and NOR Etc. For example 1/3 |0>+2/3 |1> The particle...

Hi! I wonder if it is possible to get some book recommendations on the subject of efficient data structures and memory management in scientific computing? I do a bit of parallel programming in C/C++ with MPI, and I'm now considering trying my hand at some GPU programming as well. When...

Homework Statement Consider a particle in a one dimensional box of length L, whose potential energy is V(x)=0 for 0<x<L, and infinite otherwise.Given the wave function at ground state ψ=sqrt(2/L)sin (pi*x/L) Compute ΔxΔp where Homework Equations Δx=sqrt(<x^2>-<x>^2) and...

My task is to 1) compute the Fourier transform of the function \frac{x}{1+x^2} 2) compute the integral \int_{-\infty}^{\infty}\frac{x^2}{(1+x^2)^2}dx 1) I can write my function as x \cdot \frac{1}{1+x^2} and by using the formula we let f(x)=\frac{1}{1+x^2}...

Hey, I'm learning about quantum computing for a project and I'm a bit stumped about a concept: They say in quantum computing you can have the superpostion of all possible states, then perform an operation on that wavefunction, and thus have all possible states processed in one operation...

hi, let's take something simple, for example: (a>b) && ((b>c) && c>d) || (d > c) Intuitively, it's easy to work out given the values of a, b, c and d and just evaluating the brackets in order of precedence. i.e. Is b > c?? then is c > d Then in addition to the above answer being...

Homework Statement f(x,y) = \sqrt{1+9xy}, y = x^{3} for 0≤x≤1 Homework Equations The Attempt at a Solution I don't even know how to start this problem. I thought about c(t) since that's all I have been doing, but there isn't even c(t). I only recognize domain. Can anyone help me...

The factorial of 1 trillion ends in many trailing zeros. Find the five digits that comes before the trailing zeros. I know how to calculate the number of trailing zeros, but don't know what to do afterwards. This is a computational problem.

Hello I am a senior EE student who just got an internship for a Control Systems Engineer position. The position's main task is PLC programming. However, I would like to ultimately go into computer hardware using technologies such as VHDL, Labview, Verilog, etc. I don't know much about PLC...

find the total derivative dz/dt, given: z=(x^2)-8xy-(y^3) where x=3t and y=1-t my steps look like this, can someone point out where i am going wrong, please? z'=2x-8(x'y+y'x)-3y^2 where x'=3 and y'=-1 2(3t)-8[3(1-t)+(-1)(3t)]-3(1-t)^2 =6t-8[3-3t+(-3t)]-3(1-2t+t^2) =6t-8(3-6t)-3(1-2t+t^2)...

Hi, I'm curious what is a general view on parallel computing? Is it something that's important only for science and computer graphics professionals or does it also have applications in business, etc. Are there any particular skills in parallel computing that employers are looking for, any...

At university of Toronto, do certain physics courses teach computer programmings? or do I need to take extra course for computer Not that I don't want to take it but I think I will have full course for both 1st year uni even without the computer courses. I think it is important to learn...

Homework Statement <e^{ip'x}|x^{2}|e^{ipx}> Homework Equations The Attempt at a Solution Its pretty obvious that its difficult to integrate in position-space, so I rewrite x in momentum space (i.e. the second-order differential operator with respect to p). If that is...

Homework Statement find the limit of \sqrt{x^2+x}-\sqrt{x^2-x} as x approaches infinity Homework Equations The Attempt at a Solution Multiplying the original expression by \frac{sqrt(x^2+x)+sqrt(x^2-x)}{sqrt(x^2+x)+sqrt(x^2-x)} I get the following...

Hey all, I'm an undergraduate physics major, thinking about what I want to study in graduate school. Lately, I've been extremely interested in the field of quantum computing. However, I'm not sure what the best background is to do research in this field. Is is physics? Computer science...

hi math wizards, a simple problem i have...work time is 8.5 hours while paid break is 1.25...paid break is divided into 3 parts 0.5, 0.25 and 0.5...any body knows how to compute the adherance to this? the goal of this problem is to compute the break adherance of an employee. An employee has 3...

Hi all. I'm having a very hard time understanding this portion of Physics so please bear with me. The furthest I got with this problem is deciding to use the sum of the potentials at each point to calculate the potential of the system. Something like... \frac{kq_{1}}{r_{1}} +...

Homework Statement Consider scalar functions u = u(x). Compute the gradients ∇u for: u(x) = (x, y, z) u(x) = (y, z, x) u(x) = (x^2y, 10, z + x) Homework Equations This is a question on my homework for undergraduate Fluid Mechanics. The teacher has been assigning math problems in topics...

Please I need Visual Basic algorithm for computing Hermite polynomials. Any one with useful info? Thanks.

dl (dot) r hat in computing potential?? when computing the line integral "from infinity" back toward charge, the direction is pointing to the circle. But r hat is pointing away from circle. So vector dl should equal magnitude dl times negative r hat, which would change sign of potential...?

Hi all! Having decided to return to coding some of the physical problems that I require solving(in lieu say, of Mathematica), I endeavored to adapt the Crank-Nicolson to my needs, but, in order to test my algorithm, I had first attempted to resolve the common and trivial heat equation, in one...

Homework Statement there are four particles A(0,0) B(10,10) C(0,15) D(0,5) with masses of MassA=5kg MassB=10kg MassC=20kg MassD=25kg Questions: a)total force acting on A. b)total force acting on C. Homework Equations F=Gm1m2/r^2 The Attempt at a Solution

This might go into stats, I'm not sure. But I'll throw it out there. You are at the grocery store and they have two product bundles: Four bananas and three limes for $10. Two grapefruits and five limes for $12. You want to come up with a way to compute the average cost of a lime, the...

Homework Statement Compute the magnitude and location of the resultant of the parabolic loading shown in the figure below. The slope of the parabola is zero at the origin. See figure: http://imageshack.us/photo/my-images/819/prob6.jpg/ Homework Equations The Attempt at a...

I have heard the phrase quantum computing my question is what is it? Thanks.

It takes a lot of time for my Fortran program to do I/O jobs. Is there any way to do I/O jobs while at the same time it is doing computing jobs? To do I/O jobs and computing jobs at the same time would save a lot of time. Thanks.

hello, having given 2 speeds v1 and v2 and the equation: k1*v'=k2-k3*v^{2} how do i compute the distance traveled from v1 reaching v2 and the time needed. (k1,k2,k3 are constants). i think i have to integrate to find the distance, but i just can't figure quite how to do it. any tips...

Hi, I am doing masters in Physics. For few days i am studying a book on microprocessor and it catch my interest. I'm now really curious about the whole world of computing. I'v decided to study farther on computing (may b quantum computing,robotics,etc) rather than general physics. Please...

Hello everyone, I'm from Toronto in CANADA and I am going into grade 12 this September. I figured that it's time to figure out what I want to do with my life and how to achieve it. So I've been debating between research/building a quantum computer, working on teleportation (far-fetched I...

http://www.physicspost.com/articles.php?articleId=245" I'm really hesitant about jumping on the cloud computing bandwagon. There's something about it that makes me uneasy. Am I being a curmudgeon for wanting to have complete control of my data? FYI: We back up our data twice each day onto...

An interesting electrostatics puzzle! This is a simplification of a real problem I've been hurting my brain on. Luckily the simplification is a fun challenge in its own right. Homework Statement There is a 3D rectangular solid object in space. Each face of the solid is a perfect...