Multiple Definition and 1000 Threads

Homework Statement Prove that a^3 - a is a multiple of 3 a^5 - a is a multiple of 5 Generalise … to a^n - a a multiple of n Homework Equations The Attempt at a Solution a^3 - a = a(a^2 - 1) = a(a+1)(a-1) thus three consecutive numbers are multiplied. if three numbers are...

Hello, I am relatively new to this forum as a registered member but have been reading as an unregistered guest for quite some time. I have searched and searched through search engines and forums and am really not having too much luck finding any information on using several 555 timers in an...

Homework Statement Do you see how y gets converted to csc? I don't get that. I would y would be converted to sin in polar coordinates.

Homework Statement do you see how the integral of r is .5? I don't get how that follows?

Homework Statement The Attempt at a Solution I understand the steps, although it took quite a while, but what I don't understand is that a triangle with base 2 and height 2, it's area is 2. With two triangles of that size the area should be 4. The books says the area is 8.

I need to send out a whole bunch of the same e-mails to different people and I know I can use CC or BCC, but I want to address them by their name as well. Is there a way to do that in Gmail?

So I know that the equation for the natural frequency of an RLC circuit is: ω0=(LC)-1/2 I'm just wondering how this would change for a circuit with more than one inductor or capacitor. Say for instance an inductor in parallel with a capacitor, both connected in series to another inductor...

Homework Statement The Attempt at a Solution Is there a formula for determining x = 3v1 - 2v2 It looks like you just have to do trial and error. I tried Gaussian Elimination on the two vectors and got -1.5 and .5 so that didn't work.

Dear All, Please I need your assistance in solving this MATLAB problem. I will be glad to hear from you as early as possible. Thanks for your anticipated help I have three functions First one function f_PR_W=Newtonphasemolefraction1(W_PR, z,C,K_PR ) f_PR=0; for c=1:C...

Hi, Please I need your assistance in solving this MATLAB problem. Thanks for your anticipated help I have three functions First one function f_PR_W=Newtonphasemolefraction1(W_PR, z,C,K_PR ) f_PR=0; for c=1:C f_PR_W=f_PR+z(c).*(1-K_PR(c))./(1+W_PR.*(K_PR(c)-1)); end...

Homework Statement Three masses are connected by strings and swung in a verticle circle. You are holding string 1 which is attached to a mass attached to string 2 likewise attached to another mass string 3. Which string has the greatest tension? Which string has the smallest tension?Homework...

Hi, I've lurked around this forum for a while but I wasn't able to find a great answer to this question. If you know of a thread regarding this on this or another forum, please refer me to it! My question in short (in case you don't want to read this entire lengthy post): If I have...

can i submit same research work (multiple submission) in two different journal and conference? after getting the final result i will keep the work either in the journal or in the conference. i have submitted the work to a journal and the review result will take a long time. in the...

I'm taking a final tomorrow and was just wondering if someone could confirm that these (most missed) multiple choice questions on the previous exams are answered correctly. Again, this isn't homework, they are old test questions The "Principle of Equivalence" states that __________ and...

I am trying to use Queuing Theory to do some computer architecture studies . Is there any mathematical treatment of Queuing Theory in which there is single queue but multiple classes of traffic along with multiple servers such that for every class of traffic there is one dedicated server...

Lets say you have a particle A, which then physically interacts with particle C and B to become entangled. Since A is entangled with B, and C is entangled with A, then it would follow that c is entangled to B. I guess my main question is it possible to have multiple systems entangled with each...

Flexibility -- multiple methods for solutions? I found that for some mathematical equations, for example quadratic equations or other equations where f(x)=0, the solutions for f(x)=0 could be 2 i we solve certain way and only 1 out of 2 if we use another method, somethings like changing the...

Homework Statement Two spaceships, each measuring 300 m in its own rest frame, pass by each other traveling in opposite directions. Instruments on board spaceship A determine that the front of spaceship A requires 1 microsecond to traverse the full length of B. What is the relative velocity...

1. Homework Statement Write an m.file that will integrate a function f(x, y) on any given rectangle (a,b)\times(c,d) and returns the value of the integral from a to b and c to d of the function f(x,y) . Include error-catching code in the case that the integral diverges. The program...

My dilemna is not lack of knowing what I want to do, it's knowing too much that I want to do. I'm very passionate about both Electronic Engineering, and Computer Science. I'm intending to apply for both at different universities (because I'd love to study either of them, and what I've applied...

Homework Statement To find the voltage at the 5 ohms resistor. Homework Equations V=IR Kirchoff's first and second law The Attempt at a Solution The attempt was simply too long I ended up with a voltage of 6.5V on the 5 ohm resistor... Please help me, I have been stuck in this...

Homework Statement I'm currently doing some thermodynamic analysis. I don't know where to put this question, but here goes: I have a system that has two streams entering a condenser, and one leaving. I don't know mostly anything about two of the streams. One stream I have fully defined...

I belong to a group of people who, inter alia, (try to) apply Bayesian Theory to miscarriages of justice eg the recent spate of medical staff arrested when rare (but to be expected eventually) clusters of deaths occur in hospitals. A somewhat opposite case has recently arisen which has generated...

I posted this first in the homework section, but no one answered it. I figured this might be a better section... I have multiple 1D data sets, let's call them data1, data2, data3, etc. Each data set has the same number of entries. Each one is either a row or a column (I can just use...

Homework Statement A charged particle traveling with a velocity v in a magnetic field B experiences a force F that must be: A. parallel to v B. perpendicular to only v C. parallel to v-B D. parallel to B E. perpendicular to v x B Homework Equations Requires this right hand...

Newton Law Gravitation - Multiple choice question?? Homework Statement Newton’s law of gravitation can be applied to the Earth-Moon system. Which of the following statements is not correct? A The value of G at the surface of the Moon is the same as that at the surface of the Earth...

Law of multiple proportions states that "if two elements can combine to form more than one compound, the masses of one element that combine with a fixed mass of the other element, are in the ratio of small whole numbers" I was thinking how it makes sense. and i concluded this just simply means...

Homework Statement see attached file Homework Equations The Attempt at a Solution ok so I get that the answer is B but is it because they have the same q/m ratio?

Homework Statement Let D be the set of points (x,y) in R^2 for which 0 is ≤ x ≤ 1 and 0 ≤ y ≤ 1. Find a function g: R^2 --> R for which: ∫_0^1 ∫_0^1 h(x,y)dxdy = ∫_0^1∫_0^1 h(y^5, x^3) * g(x,y)dxdy is true for all functions h: D--> R integrable over D In the question before this I...

Homework Statement I am currently taking calc III and we have starting getting into double and triple integrals. I was wondering what you are actually doing when you take a double or triple integral? And what the difference is. I understand that you find area with a single integral and find...

Homework Statement If you step up the voltage in a wire by a factor of 100, how is heat affected? A. No change B. Heat loss increases by a factor of 10000 C. Heat loss decreases by a factor of 10000 D. Not enough information to tell Answer: "C, heat loss decreases by a factor of 10000...

5. A force of 12 N is applied tangentially to the rim of a wheel with radius 0.70 m and rotational inertia 3.0 kg-m2. What angular acceleration results? a) 2.6 rad/s2 b) 2.8 rad/s2 c) 3.2 rad/s2 d) 3.4 rad/s2 e) none of these ____6. If the force in question #5 acts for 20 s, what will be the...

I need to find an equation to figure out the breakdown voltage of layers of materials. In my case it will be air then glass then an inert gas. Any one have any info on how to get this. Thanks.

Multiple Pulleys and Masses with Friction (Picture Included) [SIZE="2"]Homework Statement http://content.screencast.com/users/Waraa/folders/Snagit/media/2d699ba1-32e0-4d9c-b79f-1a1d85dccd12/03.19.2012-15.49.46.png I have solved the question but I am still iffy as to whether my solution is...

Hi guys! I think I need to explain myself before I ask for the advice :) I'm 27 (so been in grade 12 ages ago) - I didn't have science, I wrote it years later. Now I'm enrolled for a Bsc degree in the hope of getting into medical school (very tough in South Africa). I'm putting a lot of time...

I have tried solving for the exciton energy in GaAs/AlAs QWs but my calculated results do not agree with published experimental results. My model in the calculation is just a single GaAs well with AlAs barriers. Using the material parameters of both materials, and the well width, I calculated...

I already asked this question on physics.stackexchange.com, but did not get the desired response. I am interested in the opinion of your community. Picture an entangled pair of spin 1/2-spin particles with total spin 0. In the diagram, particle 1 of the pair is moving to the left (-y), and...

any one universe is infinite. So as there are multiple (parallel right?) universes, how do multiple infinities co exist? Lets say, even conceptually or mathematically? If not parallel, then again, what happens after completion of 10^500 universes?

I need to apply D'Lembert's method but in this case I don't know how. How to proceed? Determine the solution of the wave equation on a semi-infinite interval $u_{tt}=c^2u_{xx},$ $0<x<\infty,$ $t>0,$ where $u(0,t)=0$ and the initial conditions: $\begin{aligned} & u(x,0)=\left\{ \begin{align}...

Homework Statement Find the volume of the given solid. Under the plane x − 2y + z = 8 and above the region bounded by x + y = 1 and x2 + y = 1 The Attempt at a Solution Here's how I set it up. \int^1_0 \int^{1-x^2}_{1-x} (8-x+2y) dydx When I do the math, I get 21/20. I have...

Suppose I know that the diastolic blood pressure of my 30 patients is normally distributed with the same mean and standard deviation. Then the odds of one patient having a diastolic blood pressure is x higher than the others is the probability that the observed value of a normally distributed...

Series and parallel circuit with multiple resistors?? Homework Statement If R1 = 27Ω and R2 = 7Ω : a. What is the equivalent resistance of the circuit? b. What is the current from the battery? c. What is the voltage drop across the R1 resistor? Homework Equations I=V/R ΔV=-IR...

Gentlemen, I have a subform with the following fields: name of the step, the scheduled date, place and date rescheduled date. I'm having trouble making a statement in a query that has the following criteria: need to know what the step is smaller than today's date between the date scheduled...

I have a bunch of photodiodes and I want to interface to these to a computer using my sound card. I have 12 sensors and stereo input samples at around 96000hz. My idea is to connect 12 sensors to each line and have them turn on or off at a specified offset so that the total output signal would...

Homework Statement Hello everyone. My task is to find the largest positive root in a specific interval of a function using the bisection method, Newton-Raphson method, and secant method. I've written code for all three of these methods, but the only way I can find all of the roots is to hard...

On the subject of gravitational lensing there seems to be two rather different phenomena. The "arc" phenomena seems rather plausible to me, if light is affected by gravity which is natural then there should be able to get that kind of behaviour. But the multiple imaging stuff, seems rather...

Homework Statement Hello everyone. My task is to find the largest positive root in a specific interval of a function using the bisection method, Newton-Raphson method, and secant method. I've written code for all three of these methods, but the only way I can find all of the roots is to hard...

Homework Statement The circuit used in this problem is attached as an image. I made this in gEDA (the circuit is from the homework problem, I just didn't feel like using a scanner to get the image) The 2-microfarad capacitor shown in the circuit attached is fully charged by closing switch...

What are the products of electrolysis of brine solution? At cathode i know it will be hydrogen But i am confused about the products at anode:- Either water will get oxidised or chlorine. Considering the oxidation potential values - water should get converted to oxygen but practically...

Homework Statement Ok, so I am going to French University, I have to translate in English. There is a hemisphere with the radius of 2. Inside of it, there is an empty space shaped as a cylinder with the radius (a< 2) which is perpendicular to the base of the hemisphere. The density of...