What is Equivalent: Definition and 1000 Discussions

Equivalent weight (also known as gram equivalent) is the mass of one equivalent, that is the mass of a given substance which will combine with or displace a fixed quantity of another substance. The equivalent weight of an element is the mass which combines with or displaces 1.008 gram of hydrogen or 8.0 grams of oxygen or 35.5 grams of chlorine. These values correspond to the atomic weight divided by the usual valence; for oxygen as example that is 16.0 g / 2 = 8.0 g.
For acid–base reactions, the equivalent weight of an acid or base is the mass which supplies or reacts with one mole of hydrogen cations (H+). For redox reactions, the equivalent weight of each reactant supplies or reacts with one mole of electrons (e−) in a redox reaction.Equivalent weight has the dimensions and units of mass, unlike atomic weight, which is dimensionless. Equivalent weights were originally determined by experiment, but (insofar as they are still used) are now derived from molar masses. Additionally, the equivalent weight of a compound can be calculated by dividing the molecular mass by the number of positive or negative electrical charges that result from the dissolution of the compound.

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  1. Marcin H

    How do I calculate the equivalent inductance in a circuit with diagonal wiring?

    Homework Statement Homework Equations Adding inductors in series and parallel (same as resistors) The Attempt at a Solution This is the first time I ran into a circuit like this with diagonal wiring and I am not sure how to treat it. Do I add the inductors in the triangle in series? So...
  2. Marcin H

    Equivalent Capacitance and Voltage Across

    Homework Statement Homework Equations Series: 1/Ceq=1/C1+1/C2 Parallel: Ceq =C1+C2 The Attempt at a Solution So to find the equivalent resistance do I short (put a wire through the open terminals) the circuit and start adding up the capacitors? Once I do that do I just create a new circuit...
  3. H

    What Is a Complemented Voltage Source in an Inverter Circuit?

    Homework Statement [/B] I am studying a book related to digital integrated circuits and there is something I cannot understand. The book starts by explaining two basic building blocks of digital integrated circuits: the inverter and the non-inverter. My question is about the inverter. It...
  4. Marcin H

    Find Norton Equiv. for Homework: V=IR

    Homework Statement Find the Norton equivalent at the terminals. Homework Equations V=IR The Attempt at a Solution I did the thevenin equivalent, but I'm not sure where to go from there. How do I get the Norton equivalent out of this? [/B]
  5. Marcin H

    Thevenin Equiv.: Solving Homework Equation V=IR

    Homework Statement Homework Equations V=IR The Attempt at a Solution I am not sure if I did this problem correctly. To find the thevenin equivalent do you have to get the circuit into series first? I combined the resistors in parallel and found the Vth to be 6V and Rth to be 8ohms. Is...
  6. S

    How do I prove that both are equivalent limits

    Homework Statement If k is a positive integer, then show that ##\lim_{x\to\infty} (1+\frac{k}{x})^x = \lim_{x\to 0} (1+kx)^\frac{1}{x}## Homework Equations L'Hopitals rule, Taylor's expansion The Attempt at a Solution How should I begin? Should I prove that both has the same limit, or is...
  7. vetgirl1990

    Equivalent capacitance of circuit

    Homework Statement I am having trouble simplifying a circuit of capacitors that I was given. I am asked to determine the equivalent capacitance of the combination below (attached photo). Homework Equations Capacitors in series: 1/Ceq = 1/C1+1/C2+... Capacitors in parallel: Ceq = C1 + C2 +...
  8. O

    What's the equivalent resistance between point A and B?

    Simple as that, I've uploaded the image. I don't really care about the exact value, I would prefer just to know the method. So how would I find the equivalent resistance between A and B? Note the component in the middle is a constant current source.
  9. A

    Find the equivalent resistance between AB

    Homework Statement Find the equivalent resistance between AB. Homework EquationsThe Attempt at a Solution I could not find any Wheatstone bridge or series parallel combination. Should I use star delta transformation ? If yes, how exactly should I use it ?
  10. J

    Equivalent Circuit for a CSCR Single Phase Induction Motor

    I have created a circuit diagram for a single phase CSCR induction motor, but only for the purpose of calculating start-up current (i.e. motor speed is at, or very near, zero RPM). I have created this diagram because: 1) I do not have the tools & knowledge required to generate the Steinmetz...
  11. G

    Equivalent Resultant Force for Distributed Load: Is My Method Correct?

    Homework Statement i am asked to find the equivalent resultant force for this question . for the distributed load , i divided into 4 parts , is my method correct? Homework EquationsThe Attempt at a Solution total force about y = 6sin30 + 3(3) + (5-3)(0.5)(3) + 5(4) + (7-5)(4)(0.5) total...
  12. Domenico94

    Understanding Equivalent Impedance in a Bridge Circuit | Homework Help

    Homework Statement Hi everyone, I'm just having a little trouble with equivalent resistance in a bridge, in the image I attached. The textbook says that the way to solve this is to put R3 and ZL2 in series, that series is in parallel to the short circuit in diagonal, and then at the end we...
  13. A

    Integral equivalent to fitting a curve to a sum of functions

    Hello, I am searching for some kind of transform if it is possible, similar to a Fourier transform, but for an arbitrary function. Sort of an inverse convolution but with a kernel that varies in each point. Or, like I say in the title of this topic a sort of continuous equivalent of fitting a...
  14. Julian102

    How to calculate the equivalent resistance using wye delta ?

    Homework Statement https://z-1-scontent-sin1-1.xx.fbcdn.net/hphotos-xtf1/v/t34.0-12/12435980_942112312550457_1708451532_n.jpg?oh=b29a5e9b2ff96bbf0e11932d081eb25e&oe=568A9B79 [/B] We need to find the equivalent resistance along A to B ie AB Homework Equations R=(1/R1 + 1/R2+...+1/Rn)^-1 ...
  15. faradayscat

    What is the equivalent resistance from A to B?

    Homework Statement R = 10 Ohms Homework Equations Req = (1/R1 + 1/R2 + ... )(-1) Req = R1 + R2 + ... The Attempt at a Solution I honestly don't even know where to start... The obvious thing to do is 4R + 2R = 6R That's pretty much all I can come up with that makes sense... Any help?
  16. J

    Engineering Square of resistors within a circuit. What is the equivalent

    Homework Statement Homework Equations -We can re-arrange circuit components into simpler orientations as long as the components' connections to previous nodes are maintained. The Attempt at a Solution -I attempted to re-arrange the loop of three resistors at the upper left region to no...
  17. M

    MHB Is the System Equivalent to the Expressed Conditions?

    Hey! :o Suppose we have the system $$\exists y (G(y)=f \land G_1(y)\neq g_1 \land G_2(y)\neq g_2).$$ Is this equivalent to $$\not\exists y \ \left (G(y)=f \land G_1(y)= g_1 \land G_2(y)= g_2) \ \land \ \exists \ x(G(x)=f\right )$$ ? Or to $$\not\exists y_1, \not\exists y_2 \ \left...
  18. naima

    Is Fokker Planck equation equivalent to Schrodinger equation

    I found this question here but i do not understand the answer. One equation is from classical physics and the other from quantum physics. Is there another way to go from classical to quantics than the analytical extension?
  19. D

    Engineering How Do You Calculate Thevenin Voltage Using Superposition?

    Homework Statement http://puu.sh/lQPvh/d0efa216ff.png Homework EquationsThe Attempt at a Solution http://puu.sh/lQPAR/2456db4783.jpg http://puu.sh/lQPCJ/f142c25f63.jpg http://puu.sh/lQPER/5eb4af107e.jpg Is this correct? I used principle of superposition to calculate the Thevenin...
  20. gracy

    Equivalent capacitance problem

    Homework Statement If 100 volts of potential difference is applied between a and b in the circuit .Find the potential difference between c and d. 2. Homework Equations For Equivalent Capacitance in series ##\frac{1}{C}##=##\frac{1}{C_1}##+##\frac{1}{C_2}##For Equivalent Capacitance in...
  21. gracy

    Equivalent capacitance homework problem

    Homework Statement Find the equivalent capacitance of the combination between A and B in the figure. Homework Equations For Equivalent Capacitance in series ##\frac{1}{C}##=##\frac{1}{C_1}##+##\frac{1}{C_2}##For Equivalent Capacitance in parallel ##C##=##C_1##+##C_2##... The Attempt at a...
  22. gracy

    Equivalent capacitance:pentagon shape

    Homework Statement Five capacitors ,each of capacitance value C are connected as shown in the figure.The ratio of capacitance between P and R,and the capacitance between P and Q is Homework Equations For Equivalent Capacitance in series ##\frac{1}{C}##=##\frac{1}{C_1}##+##\frac{1}{C_2}##...
  23. gracy

    Equivalent capacitance, circular arrangement

    Mentor's note: Post moved to new thread since it's a new problem. One more problem Homework Statement Find the equivalent capacitance between A and B. Homework Equations The Attempt at a Solution I think all the Capacitors are in series but according to my book only three capacitors are in...
  24. gracy

    Equivalent Capacitance: Where to Place the Equivalent Capacitor Between A and B?

    Homework Statement I need to find equivalent capacitance between A and B. Homework Equations ##C##=##C_1##+##C_2##... It was for parallel connection. ##\frac{1}{C}##=##\frac{1}{C_1}##+##\frac{1}{C_2}##... It was for series connection. The Attempt at a Solution I tried to solve the problem...
  25. Y

    Calculating Thevenin Equivalent Doesn't Seem Practical

    Ok, so I know the point of the Thevenin is to make a simpler circuit so that that it results in the same current being sent to the other connected circuit. But why do we go through all the hassle of computing the Thevenin Voltage when we could choose any arbitary Voltage and a Resistor that...
  26. jdawg

    Engineering How Do You Determine Thevenin Equivalent Circuits and Maximize Power Transfer?

    Homework Statement Find the Thevenin equivalent circuit for the circuit shown. You will need to find VOC and then use the test source method to find the Thevenin resistance. Using the Thevenin equivalent circuit,determine the load resistor that results in maximum power transferred to that load...
  27. P

    Transistor's equivalent circuit

    well in midfrequency the transistor has a simplified equivalent system . our professor told us that even though pnp and npn transistors have different current directions they both have the same circuit, and that the direction of the currents in the equivalent circuit doesn t change whether it s...
  28. H

    Thevenin equivalent sc current

    Homework Statement [/B]Homework Equations [/B] Node-voltage method mesh current methodThe Attempt at a Solution [/B] My problem is with the short-circuit current. There are three meshes when you join the nodes a and b. Let i1 be the cw current for the bottom right mesh, i2 be the ccw...
  29. jdawg

    Thevenin Equivalent Finding Isc

    Homework Statement Homework EquationsThe Attempt at a Solution So far I've found Vout, but I'm a little confused about finding ISC. The solution to my homework says that in Figure 2 the 10 ohm resistor gets by passed due to the short across the open voltage. Why does this happen? Thanks!
  30. P

    How Does Point Connection Affect Potential in a Circuit with Resistor Ratios?

    Given an electric circuit, with resistors R1 and R2, find the equivalent resistance R. Data: R1 = √2.R2 Points M and N have the same electric potential so they can be connected with a conductor and this way we get the second circuit.
  31. T

    Determining Thevenin equivalent resistance

    I am currently learning about Thevenin equivalent circuits and was posed with the question attached to this post. I was wondering why I3 is equivalent to the current formed by a short circuit between nodes a and b. Shouldn't the current between a and b be I1 + I2 + I3 since in a short circuit...
  32. P

    Equivalent focal length of two lenses

    Homework Statement Two thin lenses have focal lengths of -5cm and +20cm. Determine their equivalent focal lengths when (a) cemented together and (b) separated by 10cm. Homework Equations ##\frac{1}{f_{eq}}=\sum_{n=1}^k \frac{1}{f_n}## The Attempt at a Solution So the first part was easy since...
  33. jdawg

    Find V0, ISC, & RTH: Thevenin Equivalent Homework Soln

    Homework Statement Find the open circuit voltage V0, short circuit current ISC, and RTH, Homework EquationsThe Attempt at a Solution I found the equivalent resistance to be 20 ohms(just by combining resistors in parallel and series) and V0 to be 30V, which I think might be wrong. I did a...
  34. K

    Pressure underwater and equivalent weight

    Hello, I am trying to calculate the equivalent amount of weight that a submarine would be under at 1000m below the sea. Apologies if this isn't that well explained! At 1000m - 101 atmospheres - which is 14.5 psi per atmosphere - so at 1000m it would be 1464.5 psi. Do I then multiple 1464.5 by...
  35. H

    Onto equivalent to one-to-one in linear transformations

    Can't quite see why a one-to-one linear transformation is also onto, anyone?
  36. H

    How to find the equivalent resistance?

    Homework Statement Homework EquationsThe Attempt at a Solution (a)I think there are two pairs of resistances are in parallel,one pair is the 40ohm and 50ohm resistances,and the other pair is the 30ohm and 60ohm resistances.But I'm not to sure:oldfrown: So the Req I've calculate is 152.2ohm...
  37. F

    Engineering Exercise about Thevenin equivalent circuit

    Hi all :) I'm trying to figure out the Thevenin equivalent of this circuit: I start by switching off every source and calculating the equivalent resistance: RTh = RN = (6 + 14) || 5 = 4 Ω Then I proceed with finding the voltage at 2. I note that the nodes between 1 and 2 form a...
  38. F

    Equivalent Resistance between A and D

    Homework Statement I came across a problem and I was unable to understand how the effective resisitance of this circuit is to be calculated. (Please refer to image uploaded) Homework EquationsThe Attempt at a Solution Well I assumed that current tends to flow through wires without resistances...
  39. F

    Parallely Connect Batteries: What is the Equivalent Emf?

    I heard that, emf cannot be parallely connected provided that the value of the emf are not same. Is this correct? Like, what would happen when batteries with 3V, 4V, 5V are parallely connected? And the equivalent emf?
  40. S

    Equivalent Power In series and parallel combination

    How can we derive the formula for finding equivalent power in a series and parallel combination of 'n' resistors (with fixed resistance)?
  41. S

    Equivalent material for the EN39B in Chinese standards

    Hello Everyone, Can someone pleas help me to find out the equivalent material for the EN39B steel in Chinese (GB) standard. I found other equivalents AS X9315 / EN39B Germany DIN: 15NiCrMo16-5 Great Britain 835M15 or 835H15 Japan SNCM 815, JIS G 4103 USA EN: 39B but its little bit difficult to...
  42. A

    The formulas for parallel and series connections

    Homework Statement Find the equivalent resistance between A and B. All resistances shown are in ohm. Homework Equations The formulas for parallel and series connections. The Attempt at a Solution I have attempted to redraw the circuit and my redrawn diagram looks like this. I don't think...
  43. Math Amateur

    LaTeX Latex code for the "not equivalent" symbol

    I have just posted on the Linear and Abstract Algebra forum ... and the post needs a "not equivalent" symbol as shown in Rotman's Proposition 1.58 part (ii) see below ... Can someone please help with the latex code for this symbol? PeterProposition 1,58 in Rotman's Abstract Algebra reads as...
  44. J

    MHB Equivalent Impedance: 1MicroF Cap, 1kOhm & 200mH Inductor

    Question: A 1-microF capacitor and a 1-kOhm resistor are connected in parallel, and this parallel combination is connected in series with a 200-mH inductor. Find the equivalent impedance of the connection at w=1 krad/s. Relevant Equations: Z=R for a resistor, Z=jwl for an inductor, and...
  45. J

    Determine equivalent vacuum for water depth

    Hello, I need to figure out the max water depth a motor will operate without water ingress. The plan is to use a vacuum pump to create differential pressure and correlate that to water depth. My issue is the correlation between the vacuum and pressure. Can someone please provide a formula for...
  46. M

    Equivalent DC-current of an AC-Current

    One has to calculate the equivalent DC-current in order to provide the same power on a load like a sine, triangular and square wave current do in average. I know the general formula for the average power of an AC-current is: p_{average} = \frac{R}{T} \int_0^T i(t)^2 \, dx For the sine...
  47. Strilanc

    What's the unitary matrix equivalent to a beam splitter?

    I've seen various different matrices used to represent beam splitters, and am wondering which is the "right" one. Alternatively, are there various kinds of beam splitters but everyone just ambiguously calls them the same thing? The matrices I've seen are the...
  48. A

    Calculation of equivalent resistance

    Homework Statement : [/B]Given the circuit diagram, find the equivalent resistance between points P and Q. Homework Equations : [/B]ΔVloop = 0, ΔIjunction = 0 and V = IRThe Attempt at a Solution : [/B]Eliminating the wires with no resistors and solving for resistance gives me the answer as...
  49. T

    Equivalent resistance and inductance

    Homework Statement Hello, I am going to ask a rather simple question yet I wasn't able to solve. I have a circuit which I wanted to find out about the equivalent resistance and inductance. I know how to find the equivalent resistance of two resistors in parallel as well as two inductors in...
  50. evinda

    MHB Find an Equivalent Law for Dimensionless Quantities

    Hello! (Wave) A physical system is described by a law of the form $f(E,P,A)=0$ where $E,P,A$ represent, respectively, enery, pressure and area of surface. Find an equivalent law that relates suitable dimensionless quantities. I have tried the following: The fundamental units are: Mass: $M$...
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