Equivalent Definition and 1000 Threads

Does putting the concept of acceleration in SR make it equivalent to GR? I see a lot of sources (including many posts in this forum) which seem to say that SR can handle acceleration fine, but not gravity. However, an acceleration IS gravity by the equivalence principle, so what's the...

Another one.. I'm sorry but I will likely spend tomorrow and today here with you guys asking for help and mooching solutions. Same deal, badly explained unit. We spent 15 minutes on this. Attached questions as jpg... Homework Statement How do I find total equivalent resistance? What does...

two simple questions about equivalent resistance and kirchhoff laws! pleaseeeee! :D EQUIVALENT RESISTANCE: Hi everybody . greetings from Peru.I know it's a dumb question but help please .please read below Homework Statement For the network shown in the figure, show that the resistance Rab =...

Hi guys, I have a question that is nagging me quite a lot. Let us say that we have a circuit who has two independent sources (any combination of voltage and current sources). In the determination of Vth, can we choose whether or not to use superposition to find this Vth? Because my...

Hello, You can use a Q-Q plot to visually test if 2 continuous variables are from the same distribution and you get a straight line. Is there a way to visually test if 2 discrete variables are from the same distribution? Also is there a way to test it mathematically? Thanks

Homework Statement Question Homework Equations The Attempt at a Solution I tried using source transformation. I simplified the original circuit to the above circuit. I got Rnorton, however, I am a bit unsure on getting Isc. Is it possible to source transform the above circuit further? Or...

Homework Statement Alright so I am having trouble finding the equivalent resistance of something like this Without "hooking it up" to a current source and solving a large system of equations to find the voltage drop across the network and therefore the resistance. Is there a faster...

Homework Statement I am asked to find the equivalent resistance of a simulated inductor shown above. We are told not to worry about the simulated inductor circuit. The simulated inductor will be incorporated into a larger circuit as shown below. 2. The attempt at a solution I am really...

Homework Statement I'm trying to find the equivalent capacitance for a circuit, but I keep getting stuck. Homework Equations C(parallel)=C1+C2+...Cn C(series)={(1/C1)+(1/C2)+(1/C3)+...(1/Cn)}^-1 The Attempt at a Solution See the first penciled attachment.

Homework Statement Homework Equations Resistors in series (in a straight line) add. Like R + R = 2R. And if in parallel, they inversely add. 1/R_total = 1/R1 + 1/R2 So, I have no idea how to "simplify" this. Basically trying to find the total resistance. Thanks.

Hi Can you please tell me how to find the Norton Equivalent or I should say the short circuit current in the attachment diagram? Norton resistance using two different methods but now question asks me to find resistance by dividing voltage of open circuit which I figure it out over current...

I am using Triacetin as a plasticizer. It will be mixed with R45 resin and cured with an isocyanate. It is easy to calculate the amount of curative when the EW is known for the substances. I can't seem to find any such info on Triacetin. I can't find EW, hydroxyl number, hydroxyl value or %OH...

I have read the basis of the the equivalence principle, that inertial mass = gravitational mass, and that it leads to the conclusion that any acceleration = equivalent gravitational field intensity. (I believe 'gravitational field intensity' is the same as 'gravitational acceleration'.)...

Is there one? Or do I really have to write something like this: from numpy import * with open('file.txt','r') as f: #read only data, ignore headers lines = f.readlines()[31:] # convert strings to floats and put into arrays for i in xrange(len(lines)): s =...

Hi everyone, First off I do realize that I can't directly convert force to velocity. My scenario is that I have a machine part and I have found that it begins to crack when a point load of approx 2800N is exerted onto its tip. What I am trying to calculate/approximate is if I dropped the...

Homework Statement A circuit extends forever to the right, and all the resistors have the same value ##R##. Calculate the equivalent resistance measured across the two terminals at left. Homework Equations The series and parallel equivalent resistance equation. The Attempt at a...

What is the exact definition for equivalent matrices? Is it necessary that it should be A = B if A,B are two matrices? Thanks a lot.

Homework Statement A solution to a problem has following operation: here, [(a,b)] and [(m,n)] are two equivalence classes. [(a,b)]+[(m,n)]=[(an+bm,bn)] Is not [(a,b)]+[(m,n)]=[(a+m,b+n)]? Can anyone explain it to me? Homework Equations The Attempt at a Solution

Homework Statement This isn't for a class I'm actually taking. Just self study. I'm reading a book on electronics. When I got to the part about Thevenin's theorem I got a little confused. Specifically, I'm confused about the equivalent voltage for the Thevenin equivalent circuit. It said...

Homework Statement Hello. Thats my homework question, so any hints will be appreciated. Paul consumes only two goods, pizza (P) and hamburgers (H), and considers them to be perfect substitutes, as shown by his utility function: (, ) = + 4. The price of pizza is $3 and the price of...

Homework Statement http://i.imgur.com/fSRqw.png Homework Equations V_{th} = V_{oc} The Attempt at a Solution I got the thevenin voltage by using node voltage \frac{V2-40}{5} - \frac{80+2V2}{5} -8 + V2 = 0 (\frac{1}{5} + \frac{2}{5} + 1)V2 = 32 \frac{8}{5}V2 = 32 V2 =...

Homework Statement For the circuit shown in Figure, find the equivalent resistance seen by the source. How much power is delivered by the source? http://sphotos-b.xx.fbcdn.net/hphotos-snc7/304377_496325960386924_988412599_n.jpg Homework Equations Req = R1R2 / R1+ R2 P = V^2 / R Thanks you...

Homework Statement Find Rab https://sphotos-a.xx.fbcdn.net/hphotos-ash4/199915_496321627054024_1130826860_n.jpg Homework Equations Req = R1R2 / R1+ R2 The Attempt at a Solution bottom 2Ω resistors in series ---> Req1 = 4Ω top right 12 and 4 Ω in parallel ---> Req2 = 3Ω this...

Homework Statement Find the Thevenin resistance. http://i.imgur.com/XoEfy.png Homework Equations Rth =Vex/IexThe Attempt at a Solution I found that the thevenin voltage is 869.304mV. I read in my textbook that in order to find the thevenin resistance in a circuit that contains a dependent...

Homework Statement Find a compound proposition logically equivalent to p → q using only the logical operator ↓. Homework Equations The Attempt at a Solution My book does not go into much detail about solving this problem other than providing the answer. I really want to know how to get the...

Homework Statement Homework Equations 1/Ceq= 1/C1 + 1/C2 The Attempt at a Solution 1/C13eq= 1/3C1 + 1/5C3 = 8C/3 = 2.67C 1/C12eq= (3C x C)/(3C + C) = 0.75C Ceqtotal = 2.67C + 0.75C = 3.42C I think the series circuit is throwing me off?

Why in the standard model doesn't charge need a boson like mass needs the Higgs boson?

Homework Statement I got this on a quiz today - Find the equivalent resistance between E and F. Now, the problem with this question is that I get TWO different answers when I trace from: 1. e to f 2. f to e I know one of them is definitely wrong (or maybe both are?), but I don't...

In Griffith's intro to QM it says on page 95 (in footnote 6) : "In Hilbert space two functions that have the same square integral are considered equivalent. Technically, vectors in Hilbert space represent equivalence classes of functions." But that means that if we take for example...

Homework Statement Basically, I'm having trouble doing the source transformation and subsequently finding the norton equivalent for this circuit and I don't really know where to start. The circuit is attached where: i=3A V=90V Please help!

Homework Statement Find R_AB in the network. Look at attached file "Problem"Homework Equations R_S= R1+R2+R3+...Rn (for series resistors) 1/RP= 1/R1 + 1/R2 + 1/R3 + 1/Rn... (for parallel resistors) V=IR (ohm's law)The Attempt at a Solution Look at attached file "Problem Attempt" I know I'm...

Homework Statement http://img507.imageshack.us/img507/6493/f7868b61c6cb4d6084fa5ba.png Homework Equations The Attempt at a Solution I've tried to deduct how my textbook has actually done this Thevenin Equivalent. No one in my class (that I've come into contact with anyway)...

I’m curious, but no mathematician. Euclidean geometry is the only type for which I've had training (45 years ago). Apologies in advance for misused terms. A line, as I recall, extends indefinitely in opposite directions. It has no definite “origin” or "center". If we view “translational...

Let $f:S\to T$ be a function. Prove that the following statements are equivalent.a $f$ is one-to-one on $S$. b $f(A\cap B) = f(A)\cap f(B)$ for all subsets $A,B$ of $S$. c $f^{-1}[f(A)] = A$ for every subset $A$ of $S$. d For all disjoint subsets $A$ and $B$ of $S$, the images $f(A)$ and...

hello. thanks for viewing my post. I want to know if there is a way to identify an equivalent force if I transfer the original force to a new location. is that possible? ill give an example. position of original force ----------(known distance)--------------------- desired new position of force...

Homework Statement A block with mass M is held statically on an overhang by a force Mg applied horizontally and the force of friction on the overhang. What are the normal and frictional forces? For what angles θ does the block remain at rest? The Attempt at a Solution In the picture...

Prove that the following are equivalent: a) A is bounded, b) A is "in" a closed ball Homework Statement The full problem is: Let M be a metric space an A\subseteqM be any subset. Prove that the following are equivalent: a)A is bounded. b)A is contained in some closed ball c)A is contained in...

Postulate: EVERY field has a "magnetic" equivalent. Here is a topic which I thought might be important enough to merit its own thread. I apologize for fishing it up off another discussion thread. Here is a thought experiment. Two electrons, fired off near to each other in parallel at...

Hi! I'm having some difficulty understanding how to go about solving the following problem. I'm a beginner at this and am completely lost. I've seen a few similar problems that could be solved with node/current analysis, but I don't really understand if or how to apply that here. Can someone...

how can i solve the equivalent resistance? I assume R = 2 and I = 3, I know I in node A will be divided. It's just that I don't know what direction I will go to solve for Voltage so I can solve the equivalent resistance. Is Req = 4/3 Ω ? on[/b]

A thought experiment ... You have a mass sitting in space far from any source of gravity. We know the energy it contains from e = inertial mass x speed of light squared. Using a different approach, what would you have to sum to get this total energy from properties of the mass such as...

Homework Statement Statement: A set F can never be equivalent to its proper subset E This statement appears in Halmos's Naive set theory in the chapter 13. Arithmatic. He arrives at this statement through the following steps 0. In the previous chapter, he proves the recusrsion theorem...

I know how to approach this problem. First, I will need to find the reactions at the supports. Then apply Joint or Section Cut Method to find the forces acting between the members. Then take the force acting on member b0b1 and plug in Euler Buckling equation, while choosing the correct...

Find the equivalent resistance of the circuit shown below. Each of the six resistors has a resistance of 12 ohm. I just want to make sure I calculated everything right. I don't have the solution available. Labelling the resistors from my left to the right: R1, R2, R3, R4, R5(bottom), R6...

Homework Statement http://i50.tinypic.com/w0ggl.png Homework Equations The Attempt at a Solution I am stuck at part (a) (i haven't yet tried the part (b)). I really have no clue on how should i go on finding the equivalent resistance, i don't see a way to reduce it to simpler...

According to my book, (\exists!x)P(x) is equivalent to (\exists x)P(x)\wedge(\forall y)(\forall z)[P(y)\wedge P(z)\Rightarrow y=z] But I don't see why the variable z is necessary. Wouldn't the following also be correct but shorter and easier to understand: (\exists x)P(x)\wedge(\forall...

Which position offers stronger evidence? Please vote: No or Yes. Here are a few papers taking each position: 1. No, all calories are not created equally: Evidence: a. Under Free-living conditions: Effects of Dietary Composition on Energy Expenditure During Weight-Loss Maintenance...

Find the equivalent capacitance of the combinations shown in the fig. (refer to the file attached) Is there any easier method to solve instead of this method by assuming a constant potiential difference is applied across the circuit and a total charge Q flown in it.

I don't understand the following step regarding the (i,j)^{th} element of the Fisher Information Matrix, \textbf{J}: J_{ij}\triangleq\mathcal{E}\left\{ \frac{\partial}{\partial\theta_{i}}L_{\textbf{x}}(\textbf{θ})\frac{\partial}{\partial\theta_{j}} L_{\mathbf{x}}(\textbf{θ})\right\} \\...

Homework Statement Need to calculate equivalent mass moment of inertia of a part that moves linearly at the point where torque is applied. Please find two schematic drawings in the attachement (representing the same mechanism in a slightly different way). Basically, there is a rotating crank...