Equivalent Definition and 1000 Threads

Homework Statement This was a timed assignment that I never got an answer on, nor was I given the correct answer once the assignment was finished. I understood Thevenin/Norton (or so I thought) until I got a Volt source that was PARALLEL to the first resistor and everything fell apart. The...

Homework Statement Homework Equations The Attempt at a Solution Hey everyone, just having a problem in getting an equivalent circuit. I know how to do the problem, I am just confused on how to get a equivalent impedance: I was doing (1 + j2) + (ZL) but I am not sure if...

Homework Statement Hi, i was working on finding the equivalent capacitance, but I'm not sure if I'm doing it right This is the figure : http://i8.photobucket.com/albums/a8/ryu0919/physicsproblem2.jpg? Homework Equations Find the equivalent capacitance? The Attempt at a Solution...

Homework Statement An automobile battery when connected to a car radio provides 12.5 V to the radio. When connected to the headlights, it provides 11.7 V. Assume the radio is modeled as 6.25 ohm resistor and the headlights are .65 ohms. Find the Thevenin Equivalent for the battery...

hey can anybody please tell me how to solve this circuit?? :confused: I tried this sum out but I can't understand which points are symmetrical and have same potential..or how the current is distributed

Homework Statement What is the equivalent capacitance of the four capacitors in the figure below? Take C1 = 2.6 µF, C2 = 4.1 µF, C3 = 3.9 µF, and C4 = 1.1 µF. Homework Equations Cequiv of capacitor in series = (1/C1)+(1/C2)+(1/C3)+(1/C4) Then take the reciprocal of the answer. The...

Homework Statement http://yfrog.com/mrcapdg http://img819.imageshack.us/img819/1172/capd.th.gif Find equivalent capacitance answer is 4C/3 Homework Equations whatever is in parenthesis is subscript formula1: series: 1/C(eq)= 1/C(1) + 1/C(2) + 1/C(3) + ... formula2: parallel...

Homework Statement Find the norton equivalent with respect to terminals a and b [PLAIN]http://img821.imageshack.us/img821/7177/nortonequivalent.jpg Homework Equations KVL, KCLThe Attempt at a Solution I set i1 = .008 A Then I found the rest of the currents. KVL@ loop i2: 2000(i2-i1)+30=0 i2...

what is meant by dc equivalent circuit and dc load line analysis? why we require these two ? advanced thanks.

Homework Statement one gallon of octane is equivalent to 23.4 mol of octane. the density of it is .703g/mL. Homework Equations to travel the same distance traveled with one gallon of octane, how many moles of ethanol would you need?( assuming the car works just as well with ethanol as...

Is it renormalization running? Or SU(N) Gauge transformation?

Homework Statement 10.00 g of tin (Sn) is heated in air 12.69 g of the oxide is produced. Calculate the equivalent weight of the tin. Homework Equations Sn = 118.71 The Attempt at a Solution Would you divide the mass of tin by 2 to get the equivalent weight of the tin?

Homework Statement I have this circuit (attached) and I am required to give the thevenin equivalent circuit...since its a current source, the first 300ohm resistor is ignored, right? but then is the 100 ohm and 25 ohm resistor afterwards taken to be in series of parallel, i took series...

Is it true that two metrics d_1 and d_2 on a set X are equivalent iff they have the same convergent sequences (i.e., a sequence that converges in d_1 converges in d_2 and vice versa)?

Tutor needed: Is there an odesk / elance equivalent for tutoring math/phy? Hi all, Im in my 3rd year at university studying physics and mathematics. However, I am now taking a year off from university to do self studying. My goal is to gain a deeper understanding of the subjects, as well as...

Hello I have a question to ask you. Your help will be highly appreciated. Kindly refer to a scenario where a substrate material ‘B’ is coated both side with a coating material ‘A’. The whole thing is then connected to a voltage source. Here B is poorly conductive and A is highly conductive...

Homework Statement http://farm5.static.flickr.com/4117/4775531139_8d4dd954f5_b.jpg Homework Equations I = V/R E = I1R2 = I2R2 =I3R3 The Attempt at a Solution I got 5.22 ohms for part (a), but I'm not sure how to go about calculating the amps through a specific resistor.

Homework Statement Given two matrices, A and B. Is the following statement true? A is similar to B \Longleftrightarrow A^k is similar to B^k. Homework Equations By definition, A and B are similar if there exists an invertible matrix P such that B = P-1AP. The Attempt at a...

Does anyone know how to determine whether two ellipses intersect? I don't need the precise points but rather only the answer whether there are points. All my attempts led to 4th order polynomials, which are heavy to solve, but considering that I don't need the actual points I assume there must...

Yet another proof I'd like to check. Statement. Let X be a finite set. One has to show that every two metric functions d1, d2 on X are uniformly equivalent. Proof. If X is finite, then X = {x1, ..., xn}. We have to find constants A and B such that for every x, y in X, we have d1(x, y) <= A...

Well, again I'm a bit stuck. I have to prove that the metrics d1, dp (where p is from <1, ∞>) and d∞ in R^n are uniformly equivalent. The metrics are given with: d1(a, b) = ∑|ai - bi| dp(a, b) = (∑|ai - bi|^p)^(1/p) d∞(a, b) = max{|ai - bi|, i = 1, ... ,n} (of course, the sums are...

Homework Statement A solid circular shaft has a diameter of 200mm. What would be the dimension of a hollow shaft which could replace it (i.e. transmit the same torque for the same maximum shear stress), and what would be the percentage reduction in the material required? The internal and...

Homework Statement This should be quite simple for most of you although I can't understand it. Circuit is attached below Homework Equations The Attempt at a Solution The answer is 20ohms, although I would have done R1+R3 + R4//R5 which would get 25ohms. The previous question was to find Rab...

http://img695.imageshack.us/img695/2420/physicsm.jpg i need to find thevenen equivalent circuit using R5 as load Ε1=20V, Ε2=10V, R1=6Ω, R2=12Ω, R3= 25Ω, R4=20Ω, R5=10Ω, R6=5Ω, Ι=0,2Α. Vth = -5V but how much is Rth? i can see that R4 is in series with (R2+R1)||R3 and R6 is...

Homework Statement See Figure Homework Equations The Attempt at a Solution See figure. Did I do this right? I just want to make sure I'm understanding things correctly.

Homework Statement See figure Homework Equations Rs = R1 + R2 Rp = (R1*R2)/(R1+R2) The Attempt at a Solution I tried completing one repitition of the pattern to see if I could figure out what the Req would be so: R + R in series on the end so 2R // R so 2/3R in series with R...

Hello, two distances d_1 and d_2 are said to be equivalent if for any two pairs (a,b) and (c,d) d_1(a,b)=d_1(c,d) \Leftrightarrow d_2(a,b)=d_2(c,d) How can I (dis)prove that: d_1(a,b)<d_1(c,d) \Rightarrow d_2(a,b)<d_2(c,d)

Hello all, first time I post here. I'm doing a PhD in Plasma Physics at the moment and have always been using MATLAB. It seems the research industry however does not look kindly on MATLAB and develops solely on FORTRAN (!).. Anyway, I don't need to go into a lot of detail. I have a big 10x10...

I have 2 points are : 3,5,10 and -1,2,0. How to find equivalent for its line?

The Pauli equation (seen here) contains its spin dependence in the term which reads \frac{1}{2m}\left[ \sigma\cdot\left(p-\frac{e}{c}A\right)\right]^2 So let B be any vector. Then \left( \sigma\cdot B\right)^2 =\left(\sigma_1 B_1 +\sigma_2 B_2 + \sigma_3 B_3\right)\left(\sigma_1 B_1...

Hello, I have the following circuit: [PLAIN]http://img15.imageshack.us/img15/6981/nortonm.png I need to determine the Norton equivalent for this circuit. I wonder whether the easiest way to solve this is by zeroing the independent source, connecting a test voltage source and calculate the...

Hiya, I am looking for the proof for cauchy real and dedekind real are equal (isomorphic). I know they are not equal (CR \= DR) but I need to prove them point to the same real number or mapping from CR -> DR, DR -> CR. I have looked at the textbooks on number system, real analysis and calculus...

When we are asked to find the equivalent resistance between A and B, i understand we are trying to find the Thevenin resistance between A and B, which is caused by what is in the black box. However if there is a resistor actually between A and B, do you add this to the Thévenin resistance...

Homework Statement http://img265.imageshack.us/img265/9245/45050879.png" Homework Equations The Attempt at a Solution I really just don't know. I understand how equivalent resistance works, but I just don't get this question. Please ignore the marks I have on the page.

Homework Statement All resistors have the same value, 'R' Homework Equations I don't think mesh/loop analysis or nodal analysis is applicable here, I think I'm just having a hard time seeing how the series-parallel connections work.The Attempt at a Solution I know the top left two are in...

Hi: Given a fin.dim vector space V over R, and two different bases B_V,B_V' for V , we say that B_V,B'_V are equivalent as bases ( or have the same orientation) , if there exists a matrix T with TB=B', and DetT>0. How do we define equivalent bases for vector spaces over the...

Homework Statement Using the u substutituion u = 2x + 1, ∫(2x + 1)1/2dx (when x goes from 0 to 2) is equivalent to? Answer: (1/2)*∫(u)1/2du (when x goes from 1 to 5) Homework Equations The Attempt at a Solution If u is 2x + 1, then du = 2dx. Thus, I get (1/2)*∫(u)1/2du...

Homework Statement Compute the values of the Thévenin equivalent seen by the 20 kΩ resistor using circuit analysis techniques. Draw the equivalent circuit and list the values. Homework Equations V=IR Nodal analysis mesh analysis The Attempt at a Solution I know a Thévenin...

Homework Statement I wish to obtain the Thevenin equivalent for the network show in the attachment between the terminals a and b. 2. The attempt at a solution First I considered the voltage source alone (replaced current source by an open circuit). I = \frac{V}{Z_T} =...

Homework Statement Give an example of two norms on a vector space that are not equivalent. Homework Equations The Attempt at a Solution Hi everyone, I know the definition for equivalent norms. I also know that norms on a finite dimensional vector space are equivalent. So...

Homework Statement Two 54kg blocks are held 30cm above a table. As shown in the figure, one of them is just touching a 30cm long spring. The blocks are released at the same time. The block on the left hits the table at exactly the same instant as the block on the right first comes to an...

While messing around with the Schrödinger equation on paper, I found an interesting, elegant way of expressing it. Let P be the probability density |\Psi |^2, and let \vec Q be a real-valued vector field. \vec F is a vector field describing the forces acting on the system when in a given...

Homework Statement 2. The attempt at a solution I would say Re = 6 ohm, but that can't be right.. So i really don't know how it could be something else. Any help in solving this problem would be apreciated :)

Homework Statement Let X = \textbf{b} denote the set of all bounded real-valued sequences. Define the two metrics: \begin{align*} d_{\infty}(x,y) := \sup_{n \in \mathbb{N}} |x_n - y_n| \text{, and } d_e(x,y) := \sum^\infty_{n=1} \frac{1}{2^n} \frac{|x_n - y_n|}{1 + |x_n - y_n|}...

The limit (R --> 0) of type IIA superstrings is equivalent Hi there, The limit (R --> 0) of type IIA superstrings is equivalent to the limit (R --> infty) of type IIB theory. Could someone explain how this works? Thanks

Homework Statement a 3.0 ohm resistor an unkown resistor r and two ammeters a1 and a2 are connected with a 12 volt source ammeter a2 reads a current of 5.0 amperes 1) detemine the equivalent resistance of the circuit 2) caculate the current measure of ammeter a 1 3) caculate the...

Electric Circuit. Norton/Thevelin Equivalents Unsolved Problem I used a node voltage equation to try and get Vth and the I in the short-circuit to get the Rth but it didn't work. Unsolved Problem I used a node voltage equation to get Vth and I in the short-circuit. Got Rth and...

Homework Statement a 50 ohm resistor, an unknown resistor R, a 120 volt source and an ammeter are connected in a compelete circuit. the ammeter reads 0.50 ampere 1)calculate the equivalent resistance of the circuit 2)determine the resistance of resistor r Homework Equations a =...

Homework Statement Show that W ={(x,y,z) : x +2y +3z =0} is a subspace of R3. By finding a subset S of W such that span(S) = W.Homework Equations Ab = X?The Attempt at a Solution I don't have an attempt because I'm completely lost where to start . Can someone point me in the right way please.

Homework Statement Find the open circuit voltage across A & B: Homework Equations V = IR The Attempt at a Solution If I0 is the current leaving the voltage source and passing through the first resistor, I1 is the current through the left resistor in parallel, and I2 through...