Multiple Definition and 1000 Threads

I've recently been looking for information on how to describe elastic and inelastic collisions in a way that spans the full set of possibility of different levels of elasticity between objects. In both of my physics textbooks I was only able to find quantified information on the two extremes...

Hi Guys. I have a question on the behavior of active filters (low/high/band) that are connected serially in multiple order magnitude. For instance given 2 low pass filters. Now I understand there exists a -6dB/octave cutoff, and generally f_o or the -3dB value is situated at the...

Hello everyone! I am struggling with calculating the normal forces for a vehicle that is in contact with the ground at three places (scoop, front wheels, rare wheels). To calculate the normal forces with two locations (such as front and rare wheel) it is just to balance the forces as well...

Hi, I have three M.C. questions. The answers to these questions are A, D, C. I am not exactly sure why exactly those are the correct answer (I guessed for the first one and happened to be right). Homework Statement http://ploader.net/files/1ddefae5044a52afb36b512bc019aaf5.PNG Source: IB...

Homework Statement Determine an equation to calculate the flux density at the center of a range of current loops encircling each other. Homework Equations The equation for the magnetic flux density at the center of a current loop is mu*I / (2*r) The Attempt at a Solution I...

Rather than hijack an on-going thread that is similar, I'm starting a new one to ask very specific question. Regarding the question of multiple universes, there seem to be two (maybe more, I'm new to this) types that are frequently discussed. The first are the types that are separated from our...

I am trying to compare two groups (for statistical significance), a control and a treatment group across more than one time point, for a single variable. For example Control Treatment 0 sec x x 5 sec x x 10 sec x...

Homework Statement http://physics.ku.edu.kw/LectureNotes/TheoryCourses/PHYS102/ExamPapers/y0910-2-md2.pdf page 6 number 5 Homework Equations The Attempt at a Solution I don't understand how they got the answers ? i applied the loop and junction rule but they only give me more...

I have a problem regarding concatination of multiple matrices in MATLAB. For finite number of matrices there exists a command called cat or we may even put the matrices directly in a matrix representation format to get the desired concatenation. Like, for A and B to form a matrix C in...

I have 2 gyroscopes that are aligned on a common plane. The first one is larger than the second and the second resides inside the first. The first one is proportionately less dense to account for it's size and therefore, both discs have the same kinetic energy. Also both gyroscopes are attached...

Hi, for spring break homework I had to take this "calculus readiness test" thingy and I got a score of 19/24 and I'm trying to go through the test and see which ones I got wrong. I'm however perplexed because I don't see which ones I got wrong. I guess I got five wrong but don't see which...

HELP! How to process multiple files in C++ I have been bashing my head against my desk in my cubical trying to figure this out. I have approximately 500 files I would like to read in, one at a time, into a C++ program, do my processing, and send the results to a new file. I can do the...

Homework Statement Find all solutions to the following equation: sin((5*x/2)+15)=0.433 where 0 < x < 360 Homework Equations The Attempt at a Solution i can find the first value of x that satisfies this equation. (5*x/2)+15=sin^-1(0.433) 5*x/2=10.6581 5*x=21.2162 x=4.2632...

Hi, I'm trying to import multiple files into Mathematica. Each file is a 2d matrix and I would like to import multiple files into a nested list. So far I have something that only allows me to load a single file. In:= SetDirectory["/directory"]; In:= filenames = FileNames[] Out:=...

Homework Statement Find the Jacobian of the transformation. 1) x=uv, y=u^2+v^2 2)x=v+w, y=u+w, z=u+v Homework Equations ? The Attempt at a Solution The textbook gave the answers for 1) ad-bc and 2) 2 How do I do this type of problem? I don't know how to get these answers...

Homework Statement the capital letter option was the answer that i have chosen in my test. Homework Equations The Attempt at a Solution 1. The areas under the hysteresis loop is proportional to a) Magnetic energy density b) Thermal energy per unit volume C) ELECTRIC...

“Non-integrable” multiple integrals for Mathematica Dear all, I have been trying to crack one problem in Mathematica, but I keep getting a wrong answer probably because I have something either fundamentally wrong analytically or code wise. OK, here is the problem. Suppose we have to...

Homework Statement Somebody please check my multiple choice questions, I have attempted in my exam. The capital letter is the answer that I have ticked in the exam. Homework Equations The Attempt at a Solution 1. The angular momentum of a particle under the influence of a...

Hello, In DM, how can I create two separate bodies which are connected to each other? Apprently, ANSYS would merge them as one body by default. I've checked the manual and put one of them into frozen body, they did separate as two. However, I can't transfer the model to Mechanical, I...

Hi, I hope this is going in the proper place, its essentially maximizing a matrix so here goes: Given the independant variables a, b, c, d, and e, and the system [ 1 1 0 5 1 | A ] [ 0 3 0 1 1 | B ] [ 4 1 1 0 1 | C ] [ 1 0 3 1 0 | D ] I want to find the a, b, c, d, and e that will...

Homework Statement Find the volume of the cone bounded below by z=2root(x2+y2) and above by x2 + y2 + z2 = 1 Homework Equations The Attempt at a Solution Ok I have the solution, I just don't understand how to get it! So I know I have to change into spherical coordinates but...

Homework Statement a) How many micrograms are equal to one kilogram? b) What is the power dissipation of a light bulb of the kind commonly used in households? (In your answer, give the order of magnitude only; the exact value is not required.) c) By what factor will the kinetic energy of an...

Homework Statement prove that the sum of a number's digits is a multiple of 9 if and only if it is divisible by 9 Homework Equations none that i can think of The Attempt at a Solution say any real integer can be written as: anan-1...a2a1a0 where a0 is the units, a1 is the tens...

I'm studying for a test tomorrow, I found these multiple choice questions but no answers to them. If you can help me out so I know which one is correct so I can study properly, that would be much appreciated :D 1. A 24-kg traffic light is suspended from the midpoint of a cable suspended...

I was looking at how to derive an integrating factor for a non-exact DE that has multiple variable dependency, i.e. µ is xy-dependent, and I found the explanation at the link in the middle of the page at equation (22) (link...

Topic can be Closed! EDITED: Got answers from a friend!

I'm trying to get a method to determine the time, t, when two sine waves added together peak, an exact solution. For instance, F(t) = sin(w1*t) + sin(w2*t) Obviously this is not really mathematically straightforward because there are infinitely many solution based on the nature of the sine...

Homework Statement Find terminal voltage, currents of each battery [PLAIN]http://img26.imageshack.us/img26/8667/questionl.jpg Homework Equations \epsilon=I(R + ri) Vterminal= \epsilon \pm I*ri The Attempt at a Solution Find current: I=\frac{\epsilon1+\epsilon2+\epsilon3}{R+r1+r2+r3} Fine...

[b]1. See following attatchment [b]2. Moment of force= (force)*(perpendicular distance) only for scalar problems. [b]3. Well i know that moments are a cause of roation among a certain point and when computing equilibrium we have to calculate the moment for every force on the free...

Homework Statement Which of the following are ways that catalysts can speed up reactions rates? You must check all answers that apply. A.) Increase the activation energy. B.) Decrease the energy of activation. C.) Change the path of the reaction. D.) Speedup the reaction without changing...

I recently solved a problem involving multiple points that were intended to be proven to be coplanar. Someone else suggested to me that I should be using the much messier scalar triple product. However, I worked the problem in a different way. I treated it like a conjecture (I assumed that...

A text I am reading noted that as a multichromatic light source (consisting of many individual peaks) is passed through the my slit (order .25mm) the peaks will be spread over the neighboring wavelengths in a roughly Gaussian distribution. I am trying to understand why this is, and how I would...

The Specific Absorption Rate (the rate at which energy is absorbed by a unit mass) given in W/kg is calculated by the following equation SAR = (sigma * Erms^2) / p Where sigma is the conductivity of the material (given in S/m), Erms is the RMS electric field (V/m) at the location and p is...

Guys, I was wondering if any of you has encountered a problem with multiple energy sources and the analytical solution for that problem. Is there any way to formulate this problem "without" superposition? Thanks, Frank

Let me phrase the problem in a general way. Given n objects in a set. All the objects can be categorized into k groups such that no two objects from different groups are identical. Objects in the same group are indistinguishable from each other within the group. Number of objects in each...

The Power density (Pd in W/m^2) at a distance r (in meters) for a transmitting antenna with gain Gt is given by: Pd = ( Pt * Gt) / 4 * Pi * r^2 where Pt (in Watts) is the power transmitted from the antenna. All these variables are scalar values so if there were multiple antennas and...

Homework Statement Find the critical point for z=(x^5)y+(xy^5)+xy Homework Equations fx(x,y)=(5x^4)y+(y^5)+y=0 fy(x,y)=x^5+(5xy^4)+x=0 The Attempt at a Solution After finding fx and fy shown above, I attempt to find the critical points in one of the equations above, but the only...

Problem: A = n by m matrix x = m by 1 vector y = n by 1 vector C = c by m matrix E = e by m matrix Alpha, gamma and theta are constants. norm(Ax-y) = min subject to: norm(Cx) = alpha norm(Ex) = gamma transpose(Cx)*Ex = (alpha^2)*(gamma^2)*cos(theta) I read a paper on how to do this with 1...

A billiard ball has an initial speed of 5 m/s and it collides with another billiard ball of the same mass initially at rest. If the speeds of the two billiard balls are 3 and 4 m/s, then a) momentum was conserved but not kinetic energy b) kinetic energy was conserved but not momentum c)...

Guys, I am trying to get my citations to do a "through" type thing, ala,. . .gotten using this method [1-4]. Rather, I am getting an entire listing, ala. . . gotten using this method [1, 2, 3, 4]. I am simply using . . . gotten using this method~\cite{ref1,ref2,re3,ref4}. which...

Assuming that theories regarding the existence of multiple universes are true, what would separate said universes? If multiple universes exist, it can be assumed that there is some form of separation between said universes. This could be in the form of a barrier, or a kind of "space" between the...

Homework Statement Evaluate double integral (x-y)^2 (sin (x+y))^2 dxdy taken over a square with successive vertices (pi,0), (2pi,pi), (pi,2pi), (0,pi) Thank you.

Hi Folks I hope this is the correct forum for this question. Has anybody theorized on the subject of overlapping multiple universes, I mean in a specific context, which would be that each primary particle has a mini universe that exclusively belongs to it, the parameters of which are...

In the Doppler shift or radial velocity method for detecting exoplanets, it is assumed that the orbital period of the star's planetary companion is equal to the period of the star's detected wobble. I'm assuming that this fact comes straight from the solution to the two-body problem. My...

Homework Statement A 3.00-KG mass and a 10.0-KG mass are attached to opposite ends of a massless cord which is strung over a frictinoless pulley. a) What is the acceleration of the two-mass system? b) What is the tension in the cord? Homework Equations F = net forces Fg = force...

Hi I am a beginner in using Matlab software. I want to combine 300 columns into one matrix. The dimension of each column is 24x1. Meaning, the resultant matrix should have a dimension of 24x300. Anybody can help me in this? Any help is much appreciated! Thanks

Hi everyone I was wondering how to determine the parity of a function of multiple variables. Say the function is: f(x,z) = xz How would I determine its parity? For the above function it is true that #1 f(x,z) = f(-x,-z) but its also true that #2 \int_{-a}^{a}\int_{-a}^{a}xz \dx...

Say I command the following simple script: [SIZE="2"]figure; plot([1:12],[1:12],[1:12],[4:15])' 1. How can I create a data cursor on one curve that automatically creates a data cursor at the same x-axis value for the other curve without having to manually create (Alt-Click, then line up) a...

Hi, I'm working on a paper about the problems with standardized testing. On a recent test that I took there was one problem that I thought could demonstrate one of the problems with standardized testing, multiple answers to a single question based on interpretation, and I thought I might use it...

Homework Statement Hi all, I am trying to plot multiple curves in matlab. If i have the function: y=x^i where i goes from 1 to 10. I want to plot the function y for each i. Homework Equations The Attempt at a Solution x=[1 2 3 4 5 6 7 8 9 10] for i =1:10 y = x.^i end...