Equivalent Definition and 1000 Threads

Homework Statement In the circuit shown in the figure, R1 = 3.23 Ω, R2 = 5.19 Ω, R3 = 23.1 Ω, and V = 10.7 V. a) Determine a value for the equivalent resistance. http://img651.imageshack.us/i/p074figure.png/ Homework Equations Parallel is 1/R1+1/R2+1/Rn=1/Req Series...

I'm in year twelve (in New Zealand, equivalent to 11th grade I think) and physics this year seems much harder than it was before. I usually got the equivalent of B's in physics last year, so I wasn't particularly great, and I want to get more A's this year (as eventually I want to be a...

http://img69.imageshack.us/i/circuitf.jpg/ Can someone explain what was done to go from Figure 4 to Fig 5? I tried source transformations but I cannot simplify it to that.

1. Find the equivalent resistance of the circuit as shown in the diagram below; where R1 = 1 Ω, R2 = 2 Ω, R3 = 2 Ω, R4 = 4 Ω, R5 = 1 Ω, R6 = 1 Ω, and R7 = 2 Ω. http://img21.imageshack.us/i/prob06v2.gif/ http://img21.imageshack.us/i/prob06v2.gif/Homework Equations R(parallel) 1/R(total) = 1/R1...

http://img571.imageshack.us/img571/3774/circuitb.png Uploaded with ImageShack.us For my a level homework i have to find the equivalent resistance in this circuit, i don't want anyone to do my homework i would just like to be pointed in the right direction. We have been doing a bit about...

small signal equivalent circuit model for the HJFET?? hello all, Looking for small signal equivalent circuit model for the HJFET. can someone knows ? Please help me it's urgent... Thank you in advance, N

Can someone please explain why the following three definitions for the norm of a bounded linear functional are equivalent? \| f \| = \sup_{0 < \|x\| < 1} \frac{|f(x)|}{\| x \|}, and \| f \| = \sup_{0 < \| x \| \leq 1} \frac{|f(x)|}{\| x \|}, and \| f \| = \sup_{\| x \| = 1}...

Homework Statement https://www.physicsforums.com/attachment.php?attachmentid=32837&stc=1&d=1299373667 Determine the Thevenin equivalent circuit parameters, VTh and RTh, referred to terminals A and B of the circuit shown below? Homework Equations The Attempt at a Solution My...

Equivalent spring constant... Homework Statement This is a general doubt i have...when two springs of spring constants k1 and k2 are connected in series the equivalent k is given by 1/k=1/k1+1/k2 and when they are in parallel it is k=k1+k2...Now in these cases do we assume that the natural...

Homework Statement Find the equivalent resistance of the circuit as shown in the diagram below; where R1 = 4.0 , R2 = 3.0 , R3 = 1.0 , R4 = 3.0 , R5 = 2.0 , R6 = 4.0 , and R7 = 1.0 . [Ohm] Homework Equations Parallel and series resistance equivalence Req= 1/R1 + 1/R2 + 1/R3 ... etc...

Homework Statement I need to find the Thevenin equivalent of the circuit shown: I found the open circuit voltage (VAB) by noting that VAB = V3 and used the voltage division V_{AB} = V_s\left ( \frac{R_3}{R_1||R_2 + R_3}\right ) = 12\V I am having a little trouble finding the short circuit...

1. find the equivalent resistance across points a and b The Attempt at a Solution I've used kirchhoff junction and loop rule to get a whole chunk of simultaneous equations but i can't seem to lay the finisher. Assigning I_1 to I_4 in the clock wise manner starting from the 5...

Homework Statement What is the approximate equivalent resitance of the five resistors shown in the circuit show below? http://img515.imageshack.us/i/circuit.png/Homework Equations The Attempt at a Solution How do I solve this without voltage given?

Show that ... if equivalent to ... Homework Statement Show that ∫e-t2sin(2xt)dt (bounds: 0,∞) = e-x2∫eu2du (bounds: x, 0) Homework Equations THEOREM X. Let the integral F(x) = ∫f(t,x)dt (bounds: c, ∞) be convergent when a ≤ x ≤ b. Let the partial derivative ∂f/∂x...

Homework Statement The equivalent capacitance of the capacitors shown in the figure is 9.23 MicroF Homework Equations http://upload.wikimedia.org/math/2/f/5/2f5b978fd081ea63e204909addf3d028.png http://upload.wikimedia.org/math/f/a/3/fa34ce461e6988fd973081401cc9790c.png The...

Homework Statement Find the equivalent resistance between points A and B shown in the figure . Consider R1 = 4.8 Ohms, R2 = 2.5 Ohms, R3 = 3.7 Ohms, R4 = 4.4 Ohms, R5 = 4.1 Ohms, and R6 = 6.4 Ohms.Homework Equations The Attempt at a Solution I got 9.33 by adding resistors 3,4,5 in parallel...

Homework Statement Find norton equivalent circuit Homework Equations Rn=Rth The Attempt at a Solution Ok i got my R(n)=34 ohms because after you turn off independent sources the resistors are in series, then I short circuited a to be and I'm trying to use mesh analysis to solve...

Homework Statement Write down the node-voltage matrix equation for the following circuit. Hence find the total power dissipated. (Hint: replace the emf+series resistance(s) by the Norton equivalents.) Homework Equations n/a The Attempt at a Solution The problem I'm having is that I...

Homework Statement The equivalent capacitance of the capacitors shown in the figure is 9.26 uF http://session.masteringphysics.com/problemAsset/1122585/1/Walker.21.58.jpg Homework Equations Cseries = 1/Cs = 1/c1 + 1/c2 + ... Cparallel = Cp = C1 + C2 + ... The Attempt at a...

Homework Statement Homework Equations The Attempt at a Solution I am not getting this at all. I know that I need to calculate the open circuit voltage Voc and the short circuit current Isc. I really have no idea how to find Voc. There is some conceptual leap I need to make...

Homework Statement Find the equilivant resistance in the wheatstone bridge circuit. Here is a picture: http://sub.allaboutcircuits.com/images/00485.png Homework Equations The Attempt at a Solution I know R1 and R2 are in parallel and R4 and R5 are in parralel but I'm getting confused with R3...

Homework Statement Find the equivalent resistance across Rab Homework Equations Series: Req=R1+R2...Rn Parallel Req=(R1 * R2 *...Rn) / (R1 + R2 +...Rn) The Attempt at a Solution its the geometry that is throwing me off in this problem. Starting on the left side, I want to put...

Homework Statement The equivalent resistance between points A and B of the resistors shown in the figure is 27Ohms. Find the value of resistance R. Here is the diagram: http://session.masteringphysics.com/problemAsset/1122575/1/Walker.21.36.jpg Homework Equations Rseries =...

Homework Statement Two masses, having mass moments of inertia J1 and J2, are placed on rotating rigid shafts that are connected by gears. If the numbers of teeth on gears 1 and 2 are n1 and n2, respectively, find the equivalent mass moment of inertia corresponding to theta_1. Homework...

Homework Statement Man, I stink at circuits. I have to simplify the 1st circuit in the image below to an equivalent resistance. I am almost there, but I am unsure of how to relate the remaining 3 resistances. In the drawing, a subscript Ri||j denotes the equivalent resistance of the two...

Equivalent length of of column ?? Homework Statement A Mild steel column has a cross section of 100 mm by 50 mm . Assuming a safety factor of 6 calculate the load that it can safely support? Homework Equations Rankines formula : W = Oc/K[1+a(AEe^2/I] The Attempt at a Solution...

Homework Statement Find the thevenin voltage and thevening resistance of the circuit. [PLAIN]http://img573.imageshack.us/img573/2525/thevening.png The Attempt at a Solution The posted answers for the question are 5v and 1k ohm. But I can't see how the thevenin resistance is 1k...

I will be going to university next year and I've really fell in love with the idea of working somewhere like the old Bell Labs. What I want to know is... Is there a modern day equivalent to Bell Labs (anywhere in the world) or have I created an unattainable dream, rooted in a long forgotten...

Hello everyone. I have a problem...I'm calculating natural frequency of a standing cylinder. In order to do that, I need the ke - equivalent spring constant of that cylinder. ke = (EY * s) / (h) EY is Young's elastic modulus for material cylinder's made of s is the cross section of...

For the digital cameras, is the zoom-in is equivalent to move forward the camera? My simple camera gives me 5 level zoom in, it has 3X optical zoom, but it takes me to press the button 5 times to reach the highest limit. Can I determine the forward distance of each zoom-in button pressed...

Homework Statement [PLAIN]http://img502.imageshack.us/img502/6081/93069832.jpg

I've been trying to create a program that takes a user supplied indefinite integral and integrates it using the methods I have been learning in my calculus class; substitution, integration by parts, trig substitution, partial fractions, elementary anti-derivatives, etc. I've been trying to use...

Find the Thevenin Equivalent circuit between A and B the circuit is in the attachments... i don't know how to start and don't know what it meas "Between A and B" and i never encountered a problem with a dependent source. Thanks...

The proton activation data file/s contain the target and product data plus the cross sections at a range of energies, so the reaction rates can be calclated. The only neutron cross section data files I have found have just the overall cross sections. Are there any files available that give the...

I'm currently looking to use a nonparametric alternative to the parametric repeated-measures with a between-subjects variable. I'm aiming to investigate three sets of subscores of a test taken by three groups of participants. I was initially using the parametric repeated-measures ANOVA using the...

Can some one explain why not all norms are equivalent in and infinite vector space? Examples/Counter examples? How would you go about proving/disproving this? Any or all of the above or just any help anyone has to offer would be great Thanks

please could you tell me that ,In dc equivalent circuit the resistors are replaced by cell.why is it so?though the resistor gives voltage drop where cell provides a emf then how does these are equivalent? thanks.

Homework Statement 6...y ∫...∫ x dx dy 0 ...0 The Attempt at a Solution for reference: π=pi 6...y ∫...∫ x dx dy 0 ...0 y=6=x=6. rcosΘ=6 r=6/cosΘ goes to π/2 6secΘ ∫ ...∫... r cosΘ r dr dΘ π/4...0 π/2.....r=6secΘ ∫ ... [((r^3)/3)cosΘ] dΘ π/4......r=0 π/2...

Homework Statement I'm just trying to find the equivalent resistance of this: http://sogacity.com/images/circuit.png Homework Equations Resistors in series add and resistors in parallel inversely add. The Attempt at a Solution I'm not even sure how to approach this. I guess I...

Homework Statement The question is to find the Thevenin equivalent of the network across the terminals a,b. The circuit is as follows:-- The solution is Zth = 12.166 angle(136.3*)ohm and Vth = 7.35 angle(72.9*) I can find out the Vth, that's easy. But I can get the Zth right coz there...

[b]1. How many mSv/h of x-radiation is equivalent to a dose rate of 20mR/h? [b]2. The relationship between the sievert and the Rem is i believe isievert = 100 Rem [b]3. answer i think 2000mSv/h

Homework Statement uploaded image a) What is the equivalent resistance through circuit? (Answer is 1.638 ohms) B) what is the current through the 5ohm resistor? (Answer is 1.911 amps downward) The main part I am confuse about in part A) is what is in parallel and what part is in series...

Homework Statement This is in norwegian but hopefully you can understand it. Here is the assignment and circuit: http://img835.imageshack.us/img835/3619/krets.jpg Find the equivalent Thevenin circuit when when RL is the load Homework Equations The Attempt at a Solution I really don't know...

Homework Statement Find the equivalent resistance between terminals A and B for this circuit: http://img716.imageshack.us/img716/1121/1035p.png [PLAIN]http://img716.imageshack.us/img716/1121/1035p.png Homework Equations I know how to add resistances in parralell and series...

I can not seem to figure out why Arctanh x [ Hyperbolic Arctan ] can be expressed as Arctanh x = (1/2) [ Log (1+x) - Log (1-x) ] Note; I know the 1/2 means the expression is a square root of the ratio of the 2 binomials and has been taken out with the Power Rule Can anyone show me the...

due to e=mc2 would massless photons and an equivalent number of mass-energy atoms have the same effects on gravity? Does mass play any special role in gravity or only energy?

find R equivalent of the circuit i tried the following but not sure R1 R3 parallel R2 R4 parallel then both results above as series and at last the result from above as parallel with R5 please correct me if i am wrong

Homework Statement please consider the relation over the set of integers Z , given by m=n mod (p) where p is a positive integer . Prove that it is an equivalent relation. find the elements in the equivalent class of m. find the no of such equivalent classes. Homework Equations...

Homework Statement ** note that the circuit resembles a 3-d square (the wires aren't "crossing over" each other In the problem, all circuits have resistance R If it helps, assume current i flows into a, and leaves through b and c We are asked to find the equivalent resistance...

Given that alpha is an upper bound of a given set S of real numbers, prove that the following two conditions are equivalent: a) We have alpha=sup(S) b) We have alpha belongs to S closure I'm trying to prove this using two steps. Step one being: assume a is true, then prove b is true...