Equivalent Definition and 1000 Threads

Hey everyone, In my EET program we're going over AC equivalent transistor amplifiers. We've gone over how to do some of them in class but I can't seem to figure out how to find roe. I have the output characteristic of our 2N2222 transistor and made the DC load line but I'm not sure were to go...

Suppose that ||f||= int 01| f(x) | dx and f is a piecewise continuous linear function on the interval [0,1]. If ||| f ||| = int 01 x | f(x) | dx, determine if the two norms are equivalent. I know the first defines a norm, and the space is not complete. Can anyone offer any hints as to...

I've been looking into some summer Research Experience for Undergraduates (REU) programs here in the US, but is there some kind of equivalent program for countries in Europe and elsewhere?

Homework Statement Here is the problem I am stuck on, need some advice Homework Equations ----- The Attempt at a Solution I found the moment to be -19.282 for the system shown (not sure if it correct) but I am confused about how to drawing will look for the equivalent system. (- is added for...

Let a_1, a_2, ... be a bounded sequence of real numbers. According to Rosenlicht's "Introduction to Analysis", the limit superior is defined as sup {x : a_n > x for infinitely many n}. It is very hard to work with this definition. I'm used to the simpler one: sup {a : there exists a...

Homework Statement Show that d and p are equivalent metrics on X where p=d(x,y)/(1+d(x,y)) Homework Equations ive proved already that p is indeed a metric too (if d is a metric). The Attempt at a Solution I believe I am supposed to use the Lipschitz condition where there exits...

1. This is part of a larger calculation. I do it one way and get the right answer and do it a seemingly equivalent way and get the wrong answer. The question is just about reconciling the two integrals below. 2. I_1 = \int \frac{sin(2x)}{2} dx = -\frac{cos(2x)}{4} \frac{sin(2x)}{2}...

Homework Statement http://img394.imageshack.us/img394/2907/54050356xf9.png The Attempt at a Solution I'm stuck at exercise (e). What I have to proof is that there is no M>0 such that: ||f'||_{\infty} \leq M \cdot ||f||_{\infty} But I'm having a hard time showing that for...

Homework Statement Find equivalent capacitance between terminalsHomework Equations C_eq = C_1 + C_2 for parallel C_eq = 1/((1/C_1) + (1/C_2))The Attempt at a Solution I can't tell what's in parallel and what's in series. That conductor in the center is throwing me off. Any help por favor? You...

what is the equivalent circuit for a non ideal capasitor? and if we have a parallel plate capasitor which consist of 2 metal plate of area A and held a distance apart d,we fill the region between the plate with a material with conductivity s and permitivity e.what is the inductance,resistance...

Does anyone know of a Mathematica equivalent software for Linux? A link for download will be good.. Thanks

I have reduced the problem involving different forces and a couple in a 2D plane to an equivalent force-couple system. The force F is -27.5lbi + 11.65lbj, and the couple is -66.8inlbk. I need the single offset resultant that accounts for the couple. The way I thought to solve it was to take...

Homework Statement Edit Circuit looks messed up, if you can quote me you can see the text of the circuit This is how the circuit looks*--------------------* | / \ | R2 R3 R1 / \ | *-------...

Would it be possible for a symmetric axial vector torque to be equivalent to the shear stress of two uniform rectilinear forces? as they seem to be non-related, but it works out that they should be.

Let <r,θ> be polar coordinates on R². Define f:R-->R² by f(t)=<et,t>. Let d1 and d2 be the metrics on R defined by: d1(t1,t2) = |t1 - t2|, d2(t1,t2) = ||f(t1) - f(t2)|| Are d1 and d2 equivalent? If not, is one finer than the other?

The first diagram is the given circuit. The second diagram is what I narrowed it down to. If anyone can check to see if the circuits are equivalent, I'd very much appreciate it. http://s62.photobucket.com/albums/h116/pepsi_in_a_can/?action=view&current=untitled2.jpg...

I trying to figure out a thevenin equivalent circuit I want to calculate the current I so I can't get the resistance for the thevenin equivalent. Im not 100% sure how to calculate I, can I use KCL on the node under the number -8.7V? http://img98.imageshack.us/my.php?image=curfc7.jpg

Hi All I'm trying to work out a method to determine the efficiency of a compressed air motor. Obviously I can measure the input pressure and flow rate of the compressed air, and I can measure the output power of the motor with a dynomometer. What I want to know is how much energy is...

List the values of the magnetic quantum numbers ml1, ml2 ms1 and ms2 for the two electrons in a np2 configuration to show that fifteen degenarate states exists within the central field approximation. ml can take values -1,0,1 i believe. ms can take values -1/2 and 1/2. how does this ad...

"Stokes theorem" equivalent for cross product line integral Homework Statement I am aware that the vector path integral of a closed curve under certain conditions is equivalent to the flux of of the curl of the vector field through any surface bound by the closed path. In other words, Stokes...

Here is my question. It is rather simple quetion. But I am a beginer in this field so please help me. In the case of equivalent ciruit of the tranformer it is taken that the inductance and the capacitance in the primary coil of the transformer is taken parrallel and the inductance and...

I understand that magnetic force is a relativistic effect of electric force. Is there a force which is the relativistic effect of gravitational force? If a stationary observer sees 2 electrically charged particles moving parallel to each other at the same very high speed relative to himself...

Homework Statement I really don't see how the Thevenin equivalent circuit is obtained from the one on the left. The way learned to find Thevenin equivalent circuit considers the circuit network in between 2 nodes. This one appears to have 3 nodes. And why is the thevenin resistance given as...

In the usual "windowless room" thought experiment it is stated that there is no experiment which can be performed which will determine if the room is undergoing "uniform accleration" far from any massive body or is in a "uniform gravitational field". The two situations are therefore said to be...

Problem understanding "Thévenins equivalent circuit " The problem is illustrated in the picture below. http://img266.imageshack.us/img266/5422/thevininprobxn1.jpg I am not sure i understand this so well either, any comments are appriciated. Best regards Pellefant

Homework Statement Let (X,d) be a metric space. Show that d is equivalent to the discrete metric if and only if every point in X is an isolated point Homework Equations Two metrics d, d' are said to be equivalent if they have to same convergent sequences with the same limit points...

There is an infinite square grid with each side of every cell making up the grid of resistance r. What is the equivalent resistance between two adjacent points on the grid?

Homework Statement I need to find the equivalent resistance of the following circuit that can be found in the attachment. Also, I need to find if the C, L and Req are in series or parallel. Homework Equations Rs = R1 + R2 + R3 + ... + Rn Rp = (R1 * R2 * ... * Rn) / (R1 + R2 + ... +...

Homework Statement It is in the attachment. NOTE: I supposed I did a little mistake when I drew the circuit with PSpice. The closed switch should look like .---->. instead of having that 45 angle. I don't know if it matters or not, so yea.. Homework Equations Rp = (R1 * R2)/ (R1 +...

Hello Homework Statement **attachment of problem diagram at bottom** 1)Find the current through R3 2) Find the total equivalent resistance of the circuit Homework Equations Ohm's law, parallel resistances, series resistances, Thevenin's theorem, and all that jazz The Attempt at...

I have some problems regarding spyware, malware and stuff like that on my computer. The browser runs much slower then normal and pictures cannot be adequately displayed. The XP Protection program recommends that I install their software but that will cost $50. Any equivalent software on the net...

Homework Statement Homework Equations Series: R(eq) = R(1) + R(2) + . . . Parallel: \frac{1}{R(eq)} = \frac{1}{R(1)} + \frac{1}{R(2)} + . . . The Attempt at a Solution I'm confident w/ (b) i think, but i just want to know if I'm going about these correctly. for (a), since...

I want do the Haskell equivalent of SML-like "return a function" fun foo x = fn x=>x+1 How do I do this in Haskell?

Homework Statement you have a phototransistor that you have modeled as a Thevenin equivalent circuit. It has a output impedence(Thevenin Impedence) of 10kohm and produces a peak voltage o2 2V at a frequency of 80 MHz. The input impedence of the oscilloscope as this simple combination of input...

Homework Statement Find equivalent resistance in: http://img135.imageshack.us/img135/585/62083770ay3.jpg Homework Equations The Attempt at a Solution my r_eq^-1 = (30+60)^-1+(40+10)^-1 this is wrong. do i need to include 8 and 4 ohm resistors

Homework Statement The problem is to find the equivalent resistance between a to b. Homework Equations Req in series = R1 + R2 + ... Rn Req in parallel = inverse of sum of 1/R1 + 1/R2 + ... 1/Rn Kirchhoff's Rules The Attempt at a Solution Well, I tried redrawing the circuit to figure...

Hi. This is a simple one (I think): We all know a swing, or simple mass on a spring, moves in harmonic motion, and has a specific resonative frequency. We also know that the RCL circuit (which includes a coil and a capacitor) reacts similarly to an external oscillator, also with a specific...

Homework Statement Find the equivalent resistance between points A and B in the drawing. Homework Equations Rseries = R1+R2+R3... Rparallel: 1/Rp = 1/R1+1/R2+1/R3... The Attempt at a Solution Reducing it down: 1/8+1/9 = 1/R1 = 4.235 That's in parallel with 20, so...

[SOLVED] Equivalent capacitance; complex circuit Homework Statement Hello, I was assigned a problem where we are supposed to find the equivalent capacitance of a circuit, and then use that to answer some other questions. However, I'm not sure how to handle this circuit...

Finding the equivalent resistance...PLEASE HELP! Homework Statement So I have a cube and it has resistance on every edge and I need to find what is the equivalent resistance? No numbers are given just the cube itself. Homework Equations The Attempt at a Solution How in the world...

Hello, I am working on the following problem: http://img155.imageshack.us/img155/2478/thevpo9.jpg I am stuck on this seemingly simple circuit problem. I've worked many Thevenin circuit problems in my introductory circuit analysis. This problem is from a new class and seems different...

Homework Statement Reduce the circuit as much as possible. All resistors have R and all capacitors have same C. Homework Equations The Attempt at a Solution http://photos-a.ak.facebook.com/photos-ak-sctm/v183/24/75/1238100168/n1238100168_30112052_7338.jpg And this is my...

Find a function f such that f is in L^P(R) but not in L^Q(R) for p not equal to q, where R is the set of real numers. I'm guessing I need to find a function that only blows up when it is raised to the qth power, but I am having some difficulty proving this.

[SOLVED] Small-signal equivalent circuit models - How? Basically I've got an exam in circuitry this thursday and I've noticed that every single exam has one of these amplifier circuit excercises in them where the first part is usually finding the small-signal equivalent of said model and the...

we define mech equivalent of heat as the amount of work done in joules in order to provide 1 cal of energy. 4.2 J= 1 cal is mech equiv of heat simply a conversion factor or does it have any other physical significance?

hello I have a problem in calculating the equivalent impedance of a simple AC circuit, where the impedances are: Z1 = 5+i20 Z2 = 5+i20 Z3 = 10-i2,5 Z4 = -i10 Z5 = 5 and I need to find: Z_eq = Z3 // [(Z1 // Z4) + (Z2 // Z5)] where the + indicates 2 components in serie...

Hi there, I am reading this old journal and found this formulaes. forces on the seismic mass, expressed in inertial reference coordinates, are given by Newton's law as sum of force in x direction = m * x'' sum of force in y direction = m * y'' = Fy = mg the equivalent acceleration...

Find the equivalent intersection point of multi lines in 3D space. HI everyone, I'm not a native english speaker, so I wonder you could understand my question very well. This question originates from my physics experiments. When I catch several lights from my equipment, the light...

Hi, I've got a Masters in Physics, but always feel that I'm missing out slightly by not knowing and appreciating the beauty that there is in all the maths I never had cause to study in my physics degree. Is there a book (or set of books) that does for maths what the Feynman Lectures do for...

Is it possible to know how many equivalent class has an arbitrary group?