Application Definition and 945 Threads

Hi everyone I have a quick question regarding heat transfer. I have yet to study heat transfer yet but I have a basic understanding of the mechanisms from general physics courses. My particular question is regarding airflow across a surface and its ability to cool a heat source. The situation...

I'm applying to Cambridge Maths. Will I be disadvantaged if I only take 3 A levels and no additional AS? I have no GCSE equivalent as well.

Homework Statement Find the value of the line integral \int C(e-x^3 - 3y)dx + (tan y + y4 + x) dy where C is the counterclockwise-oriented circle of radius 4 centered at (0,2). The Attempt at a Solution First off, I didn't think this was path independent since the derivative of the dx term...

Hello everybody, I will be graduating with an undergraduate degree in physics this year. I am not an American and I would like to go to graduate school in the US. Last semester I failed some upper level classes and because of some personal stuff and my GPA is lower than 3 now. I want to...

Homework Statement Let f(x,y) = xe^{x^2 + y^2} + y^3 + cos x a) Show there exists a differentiable function \phi(y) such that x = \phi(y) solves f(x,y) = 1 in some neighborhood of (0,0) in R^2. (Meaning (x,y) satisfies f(x,y) = 1 for (x,y) near (0,0) if and only if x = \phi(y)) Prove your...

how is the wavefunction of 1-D infinite well modified by the application of an electric field to the well.

My name is Andrew Bentley, a Geology student of Temple University. I am currently working on a thesis that uses a geostatistical technique that uses semivariograms on ground-penetrating radar (GPR) data. I would have posted this in the Earth Science section but all my issues are in the...

This device was sitting outside my work area 2 weeks ago. I am enjoying working on devices which are at the forefront of oceanographic research.

Hi everyone! I'm trying to work out a physics problem using Lenz's Law, but I'm having trouble with the Right Hand rule, which as I understand is supposed to be used to solve the problem. 1. Basically, there are 2 copper wire loops, Loop A and Loop B. They are lying flat on the table. There...

Hello, I have to give a presentation on an application of electromagnetic field theory of my choosing, and I was wondering if anyone had any suggestions that might be more interesting than the ones that have been suggested. It's for a 2nd year university level physics (E&M) course, so the...

Hi everyone, I do economics but am very poor at Math. I had a specific and perhaps silly question about the implicit function theorem, but will be grateful for an urgent response. Suppose we have a function, U(x, y). x and another variable z are linearly related so the function can also...

Homework Statement Use the shell method to find the volume of the solid obtained by rotating the region bounded by y=x2, y=0 and x=1 about the x-axis. Homework Equations lim Ʃ2∏RhΔw Δw->0 The Attempt at a Solution I realize this is hard to visualize without a graph. I...

I have an idea in which I need to manipulate a positron using an electrical field. However, in order for the problem to work, I need to make sure that the positron's kinetic energy is under 511 keV. to do this, I used Coulomb's law (F=\frac{kQ1Q2}{r^2}) to obtain the force. Because F = ma, I...

I am looking a definition and application of Radii of Gyration. I want to understand this concept by looking at a 50x100 Tube withstanding wind pressure as I have drawn using Autocad. So far I do know that the greater the Radii of Gyration, the greater the rigidity of the section i.e the...

Investigate the possibility of solving x2-4x+2y2-yz = 1 for each of its variables in terms of the other two near the point (2,-1,3). Attempt: Ok so using the IFT I was able to determine that I can only slze for y,z. But in the question they ask me to solve for y and z. z was not problem, but...

[FONT=Lucida Grande]Hello everyone. [FONT=Lucida Grande]I wish to get the solution to the following: [FONT=Lucida Grande]x'(t) = [A*exp(B*t)-C]^(m) [FONT=Lucida Grande]I can get the plotted solution by Matlab, but I wish to find the analytic solution by myself. [FONT=Lucida Grande]Does anyone...

Homework Statement Hello, When a current carrying loop (of any shape) is placed in a uniform magnetic field B , the field is given by MχB where M is the magnetic moment vector I*A where I Is current and A is the area vector. I want to know at which point or for which axis is the torque...

There is mention that dot products of vectors are used in backface removal in 3d graphics. Does anyone know of any article which explains the application of dot products to this area of graphics? I am looking for a concrete example.

A cylinder shaped container of tar has a diameter of 2m. If it is half full of tar with a density of 920 kg/(m^3) and is on it's side, find the force on each end. Helpful hints: 920 kg per m^3 is the mass density not the weight density. Take g= 9.8 m/ sec^2Please assist. I'm not sure at all how...

Hi, I want to develop an application. For this purpose I found a site that deals with this kind of topic. Information is given about a software called (link and name deleted) have you heard about it? There are samples proiveded but they are in C# and I am not familiar with that programming...

I have a problem in my logic course which I can't get my head around: I have to show that there is a well formed formula \mathcal{A}(x_1) in the formal first order system for arithmetics, \mathcal{N}, with precisely one free variable x_1, such that \mathcal{A}(0^{(n)}) is a theorem in...

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How can I put laboratory equipment as a real-life application? Because I have this Formal Report that contains: Introduction Theory Methodology Data and Results Conclusion References and I don't have any idea how to start. can someone help me?

I applied for a job at a semitech company that makes NAND. Anyone know of a good book or source that I can find detailed structure information. The job posting also mentioned probe and param, which I don't know details about. Any help is appreciated.

Homework Statement http://img836.imageshack.us/img836/9994/27794040.jpg The Attempt at a Solution Here is the circuit I re-drew: http://img403.imageshack.us/img403/6752/dsc0048ga.jpg Working out: http://img857.imageshack.us/img857/5633/dsc0049mo.jpg I got the denominator correct, but my...

I was thinking that a car battery is a 12v source that delivers between 300 and 900 cold cranking camps. That'd put the cranking wattage at between 3600 watts and 10,800, right? Here's a car battery 'helper': http://goo.gl/Roo2l This is hypothetical at this point but what I was wondering...

Hi everyone :). I have one question about classical mechanics, which is illustrated in the attachment. The question is: for rigid bodies, how can the same external force F produce more overall movement in situation A) than in situation B)? This seems to contradict the conservation of energy...

Can someone help explain the difference between EDX(Energy-dispersive X-ray spectroscopy) vs. (XPS) X-ray photoelectron spectroscopy? Which is used for what application? Advantages/Disadvantages of each? From what I have been reading from documentation, they seem to be the same. Thanks.

We have this system of equations: \begin{cases} x'= -x + 2y & (1)\\ y' = -2x - y + e^{-t} & (2) \end{cases} where x(0) = 0 ; y(0) = 0 We apply the Laplace transform on (1) and (2) and get: (s + 1)X - 2Y = 0\\ 2X + (s + 1)Y = \frac{1}{s + 1} We can use elimination here...

but I have a headache. Here's the question: A laundry powder company wishes to produce a 27mm^3 washing powder capsule in the shape of a rectangular box. Due to production rescrictions, the width and the depth of the capsule must be equal lengths, and all dimensions of the capsule must be equal...

For a fixed number a, find the number of solutions $z^5+2z^3-z^2+z=a$ satisfying $\text{Re} \ z>0$. Not to sure on how to tackle this one.

Application of Schwarz Lemma--Complex Analysis Let f be holomorphic in D = {z: |z| < 1} and suppose that |f(z)| ≤ M for all z in D. If f(z_{k}) = 0 for 1 ≤ k ≤ n, show that |f(z)| ≤ M \prod |z - z_{k}|/|1 - \bar{z_{k}}z| for k = 1 to n and |z| < 1. I am just very confused about...

Dear All I have a question about the validity of Maxwell Boltzmann velocity distribution in the case of nanoscale systems. When you consider a nanoscale system such as flow of water molecules (less than 100 molecules) through a carbon nanotube or graphene sheet, is it possible to expect a...

Homework Statement Two charges of masses m and 2m, charges 2q and q respectively are placed in a uniform electric field and are allowed to move at exactly the same time. Find the ratio of their kinetic energies. Homework Equations Field = qE Force =(Kq1q2)/r^2 Kinetic energy=1/2mv^2...

So I'm taking my complex variables class and learning about these cool powerful theorems like the Cauchy Goursat theorem. I know this all has huge application in physics however I just don't know what they are. Currently I'm only taking freshmen E@M so I know I won't be using it there. But next...

Hello, I consider starting a master in theoretical physics in a little more than a year. Currently I'm halfway doing a bachelor in both (applied) physics and mathematics and so far it is going pretty good. I looked around a bit on the internet and came across the Cambridge website and read as...

Homework Statement *see attachment* Homework Equations The Attempt at a Solution Alright, so we just began messing with functions in our class and I'm kinda struggling to grasp this assignment. I believe it should begin like this: shape = menu('Choose a shape','1...

Homework Statement A company mines low-grade nickel ore. If the company mines x tons of ore, it can sell the ore for the price p = 225 - 0.25x dollers per ton. How much revenue will the company make by selling an additional 1 ton of ore on top of what is being produced to maximize revenue...

Consider a wire of length l. At time t=0, one end of the wire is at temperature T_0, while the rest of the wire is at temperature T_1, T_1<T_0 (for example, one end of the wire is kept in contact with an external hot body, at temperature T_0). After how much time the temperature near the second...

Real Work Application of "Newthon-Raphson" method. Homework Statement Hi, an undergrad engineering (presentation) question: As a presentation, I am (plus a group mate) tasked to present a real world application of the Newthon-Raphson method (of finding a root). Now I know that we can also...

Homework Statement Compute the integral: ∫ x2/(x4-4x2+5) Homework Equations Uses Residue theorem. The Attempt at a Solution So I found the zeroes of x4-4x2+5 to be 2+i and 2-i, and therefore the one that is of relevance is 2+i since it is in the upper half-plane. Then I used...

hi, I'm simulating a system of molecules (water) and in order to pass through a barrier they have to overcome an energy barrier of 4kT. What is the probability of a water molecule passing the barrier or perhaps what is the average energy of a water molecule in my system? I know it's 1/2 *kT...

HI, I am having some trouble understanding the effects of an impulse on rolling motion, particularly without slipping. For eg, if we take a sphere of radius R and mass M, then what is the point h above the centre C at which when an impulse is imparted, will cause pure rolling motion...

Application of Newtons laws (Friction related) check my solutions please :) Dont forget to check the diagram, as it will probably help you see the problem correctly, don't worry, no need to download diagram attachment to view it. Homework Statement A child pushes a block of wood with a...

Homework Statement Hello everybody, Can you help me solve this: Coal-burning power plants convert the sulfur in the coal to sulfur dioxide (SO2), a regulated air pollutant. The maximum allowable SO2 emission for new power plants (i.e., the maximum allowed ratio of the mass of SO2 emitted...

what is application of Quantum mechanics i need 10 applications at least of Quantum mechanics and I'm beginner at Quantum world i need some books names and i find the math of it very hard need help please? note that I'm need easy MAtrial not complex

what is application of Quantum mechanics i need 10 applications at least of Quantum mechanics and I'm beginner at Quantum world i need some books names and i find the math of it very hard need help please? ψ

Calculating magnitude and direction of an magnetic force on an electron Homework Statement Okay so the question says that the magnetic force (Vector)FM on a particle which is in a magnetic field is found by (Vector)FM = Vector I x Vector B. Vector I = charge multiplied by the velocity of...

Due to unforeseen circumstances (burnout, depression), I recently had to withdraw from all of my courses (5 courses) and this brings my total number of W's up to 11. Am I doomed? Even if I went back to school and continue to excel, would my graduate school application ever be given serious...

1. Homework Statement The figure shows 1.0*10^-6 m diameter dust particles in a vacuum chamber. The dust particles are released from rest above a 1.0*10^-6 m diameter hole, fall through the hole (there's just barely room for the particles to go through), and land on a detector at distance d...