Equivalent Definition and 1000 Threads

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. M

    Equivalent expressions for infinite series

    Question: I was just wondering if there was any error in what I've done in the following steps to find the series representation of ##lnx##. I know ## \frac {1}{x}## is given in the following link by doing having the a function centred at 0, you can let ##f(x) = ∑^∞_{n=0} \frac...
  2. gfd43tg

    How Do You Determine the Equivalent Capacitance in Complex Circuits?

    Homework Statement Reduce the circuit below into a single equivalent capacitor at terminals a,b. Assume all initial voltages at t = 0 are zero. Homework Equations The Attempt at a Solution Okay, this is the circuit I had in mind when I made this thread earlier...
  3. gfd43tg

    Thévenin equivalent with dependent source

    Hello, I had read in my textbook that when a dependent source is in a circuit, and you wish to find the thévenin resistance, then the method to solve for the thevenin resistance is to turn off the independent sources and add an external voltage, then find the external current. The external...
  4. gfd43tg

    Solving Thévenin Equivalent Circuits: Confused by Different Methods

    Hello, For thévenin equivalent circuits, I thought current sources are replaced with open circuits and voltage sources are replaced with short circuits. In this video, the guy replaces both with open circuits, so I am not understanding how that works. Because of all the different...
  5. B

    Solving for x: Are F(x) and G(x) Equivalent?

    F(x) = (x^2 - x)/(x-1) G(x)= x I factored x^2-x and canceled denominator of f(x) which simplify to x So it does equal x does not now matter that in original equation x cannot = 1 otherwise denominator = 0 I'm just making sure they are = and but maybe not equivalent. Trying to learn more of...
  6. T

    Engineering How Can Laplace Transforms Be Used to Analyze Circuit Transient Responses?

    The amplifier and filter of FIGURE 4 can be represented by the equivalent circuit of FIGURE 6. (Figs are in image 1 and 2 attached) (i) Draw the Laplace equivalent circuit and hence derive the equation for vout(s) in terms of R, L and C for a step input. (ii) Attempt, using the component...
  7. gfd43tg

    Find Thevenin Equiv at (a,b): Troubleshoot Currents

    Homework Statement Find the Thevenin equivalent circuit at terminals (a,b) of the circuit below: Homework Equations The Attempt at a Solution my currents aren't adding up right. When I try to solve for Ix using my two equations that should find it, I get different answers.
  8. gfd43tg

    Engineering How Do You Determine the Thevenin Equivalent Circuit for Complex Networks?

    Homework Statement Find the Thevenin equivalent circuit at terminals (a,b) for the circuit below. Homework Equations The Attempt at a Solution I am having a conceptual issue for this circuit. I can't combine any of the resistors, and my gut is telling me that something about the...
  9. P

    Equivalent Circuit: Re-Draw OK?

    Just wondering if its ok to re-draw this http://postimg.org/image/a074v6cor/ as this http://postimg.org/image/uvtf6f8vv/ ?
  10. M

    Engineering What is the Thévenin equivalent of this circuit?

    Homework Statement Problem located in attachment.Homework Equations Parallel, series and wheatstone bridge equations for resistorsThe Attempt at a Solution Converted the circuit to look less confusing. Work shown in other attachment. I am simply using the equations relating to simplifying...
  11. D

    Low and High Frequency Signal Equivalent

    Homework Statement Assume λ≠0. Also bypass capacitor is very large compared to coupling capacitor. a.) Draw the low frequency small signal equivalent and derive lower 3dB frequency formula. b.) Assuming transistor high frequency capacitances, draw the high frequency small signal equivalent and...
  12. T

    Are My Thevenin and Norton Equivalent Calculations Correct?

    Homework Statement For this problem (pic attached) I did the open circuit calculations and found V1 (6v) and V2 (4v) and I know they are correct. However I am not sure if my Voc and Isc (open circuit voltage and short circuit current) calculations are correct. The Attempt at a Solution...
  13. M

    Capacitance - combining multiple capacitors for equivalent C

    Capacitance -- combining multiple capacitors for equivalent C In the given problem, Ceq = C1C2C3C4/(C1 + C2 + C3 + C4) The answer says the equivalent capacitance is always less than C1 but I can't come up with thy. When I do this, I can't seem to prove that equivalent capacitance is always...
  14. S

    DC Circuit Equivalent Resistance Problem

    Hello guys, My teacher gave me a question regarding calculation of equivalent resistance, trying to solve which I'm losing my sanity. I feel a bit ashamed because this is my first post and I'm using it to ask a doubt, a little selfish of me. But it's kind of urgent so I don't really have a...
  15. P

    Thevenin Equivalent: Solving Circuit Problems

    Homework Statement http://postimg.org/image/5wtty6dvr/ I'm trying to find the Thevenin equivalent of the circuit on the left side and but having trouble in getting the open circuit voltage. Does no current flow through R3 since that way leads to a dead end?
  16. JasonHathaway

    Equivalent resistance between two nodes homework

    Homework Statement Determine the equivalent resistance Req as seen by the voltage source VS (the resistance between a and b) http://i.imgur.com/A1ueQnd.jpg Homework Equations Series-Parallel combinations The Attempt at a Solution http://i.imgur.com/K1ItpF0.jpg The only...
  17. P

    Why Are the 5 and 20 Ohm Resistors in Parallel?

    I'm trying to find the equivalent resistance of this circuit but I don't know where to start. The solution manual says that the 5 and 20 ohm resistors are in parallel as well as the 6 and 3 ohm resistors. Can someone explain why?
  18. JasonHathaway

    Current division, equivalent resistances and short circuts

    Hi everyone, this my first post in here. Anyway, this is a solved problem, but I can't get the answer :S Homework Statement Homework Equations * Series-Parallel combination (RT=R1+R2+R3...+Rn for series, 1/RT=1/R1+1/R2+1/R3...+1/Rn for parallel) * WYE (TEE) - DELTA (PI)...
  19. O

    Electronics: Find Thevenin equivalent voltage & resistance, etc.

    Homework Statement http://imgur.com/w5AQ1A8 As shown in the image: In the circuit below R1=100Ω, R2=1000Ω, R3=99Ω, R4=1000Ω, R5=10Ω, and V=10V. (a) Relying on the Thevenin theorem, find the equivalent voltage and equivalent resistance for the circuit below when the resistor R5 is taken out...
  20. P

    Equivalent resistance in circuits

    Homework Statement http://postimg.org/image/p14d9faf9/ The top two resistors are in parallel, so their equivalent resistance is 0.6 ohms. But if you were to draw the equivalent circuit, where do we place this equivalent resistance? can it be placed either where the 1 ohm or 2 ohm...
  21. I

    Engineering Question on voltage in a Thevenin equivalent circuit

    I am trying to refresh my basic electricity knowledge so the questions might be a little stupid lol. 1) Am I correct in saying that the voltage, V1, across the 6 ohm resistor is equal to the VOC? 2) Why isn't the voltage across the voltage source, V2, equal to V1 and VOC? I thought that...
  22. R

    What Is a Statically Equivalent Force in Complex Body Analysis?

    I am working out statics past papers to prepare myself for my exam which is in 3 days time, I encountered the following problem. Homework Statement A compound body, supported as shown in Figure 2, consisting of a rectangle, semicircle, and the triangle is made of aluminium, and has a...
  23. A

    Engineering [Circuits] Calculating the Norton Equivalent

    Homework Statement Homework Equations The Attempt at a Solution I am trying to compute ##I_N##. I connected nodes a and b. The circuit after some simplification: $$\frac { 180-{ V }_{ 1 } }{ 20 } =\frac { 120-V_{ 1 } }{ 40 } \\ { V }_{ 1 }=240\quad V\\ \\ R=\frac { V...
  24. A

    Engineering [Circuits] Computing the Thevenin Equivalent #2

    Homework Statement Homework Equations The Attempt at a Solution I am trying to find the equivalent resistance for part b. First, we turn off independent sources. We open circuit the 2A source and we close circuit the 30V source. We're left with two resistors. Are they in series or parallel...
  25. A

    Engineering [Circuits] Calculating the Thevenin Equivalent #1

    Homework Statement Homework Equations The Attempt at a Solution I got ##R_{ th }=4\quad Ω## easily but I am having trouble finding ##V_{th}##. Assume the negative terminal of the 32V voltage source is ground. Here is the nodal analysis at node 1: $$\frac { 32-V_{ 1 } }{ 4 } +2=\frac { V_{...
  26. .Scott

    Current Loop equivalent to Earth's Magnetic Field

    I'm trying to get a feel for the overall magnitude of the Earth's magnetic field. If I placed a superconducting belt around the Earth magnetic equator, how much current would that loop have to carry to approximate the Earth magnetic field? Currently, the field at the equator is about 31 microT...
  27. N

    What Is the Effective Resistance Between A and F?

    (please check attachment) Calculate the effective resistance between A and F Initially, I thought that the first resistance is ignored and the current takes the lower path. Then 2Ω and 2Ω are in parallel giving an effective resistance of 1Ω. However, it could also be that all three are in...
  28. Saitama

    Equivalent Resistance of Infinite Resistor Chain

    Homework Statement What is the equivalent resistance of the infinite resistor chain, shown in the figure, between the points A and B? Plot the equivalent resistance versus q graph. [PLAIN]http://www.komal.hu/kep/abra/e4/b2/0d/cec528140d62b825f84ecf4d8.gif Homework Equations The...
  29. S

    Simple equivalent resistance question

    Homework Statement how many minimum no of resistances of eash 2Ω resistance can be connected to have an effective resistance of 1.5Ω Homework Equations The Attempt at a Solution I tried to put 2 in parallel,series and different combinations. After 5-10 mins of relentless...
  30. S

    Find Thevinin Equivalent of Circuit - 20V, 10kΩ

    Hi, Im trying to find the Thevinin Equivalent of the attached circuit. The answers I am getting are Vth = 20v Rth = 10kΩ The attachment shows my workings for the problem. Please advise if there are any errors in my work and if you could where and what i need to do to correctly...
  31. Entanglement

    Equivalent resistance of a complicated circuit

    I know that the current should flow through all the circuit but I have heard that the two vertical R in the circuit don't count I can't understand why?! I need a obvious clear explanation for this in detail thanks in advance.
  32. Entanglement

    Equivalent resistance of a complicated circuit

    I would like to know the equivalent resistance of this circuit with a clear obvious explanation, thanks in advance
  33. M

    Solving Norton Equivalent Circuits - Help Needed

    Homework Statement Having some Difficulty in starting the second question on this sheet. i have managed to find examples and worked my way through the first question, but unfortunately my tutor has decided to move onto pastures new, and we have an assignment to complete but no tutor which...
  34. Superposed_Cat

    Why are heilicty and chirality equivalent for massless particles?

    Salutations, question: ~wikipedia. I'm assuming that's because (correct me if I'm wrong) those particles would travel at c and you could not overtake them so their chirality and helicity are equal.But if a photon was coming towards you then zoomed past you surely the chirality would change...
  35. M

    Buckling question finding equivalent length and I

    Hello, I am having trouble understanding why the equivalent length in buckling problems, as well as the moment of inertia, change depending on what plane of buckling you are looking for, and how to calculate the moment of inertia in a particular plane
  36. B

    How to Determine Current Flow in a Circuit with a Shorted Voltage Source?

    i am confused at the 20v voltage since it becomes short circuit.i had started reading the circuit from the left side 1M ohm and 2k ohm are in parallel and in series with the 3k.knowing that current wants less resistant ways it will go to the killed voltage source...after that I am wasnt able to...
  37. Darth Frodo

    When to use equal to or equivalent to?

    When is it appropriate to use \equiv as opposed to =?
  38. E

    Proving the various forms are equivalent

    Homework Statement In Section 5.2 we discussed four equivalent ways to represent simple harmonic motion in one dimension: x(t) = C_1 e^{i \omega t} + C_2 e^{-i \omega t} (1) = B_1 cos(\omega t) + B_2 sin (\omega t) (2) = A cos(\omega t - \delta) (3) =Re C e^{i \omega t} (4)...
  39. M

    Equivalent formulations of completeness

    olarBear: Yes, all of these formulations of completeness are equivalent. It is a fundamental property of real numbers and metric spaces, so it makes sense that any formulation of completeness would be equivalent to the others. To answer your specific questions, 3 does imply 1, and 5 and 6 do...
  40. R

    Equivalent capacitance odd circuit

    I'm having a time figuring out how to solve this one, hope someone can help me out Homework Statement "Calculate the equivalent capacitance between X and Y on the circuit in the figure. C1=C3=C4=C5=8uF, C2=20uF" Homework Equations The Attempt at a Solution I can't figure out a...
  41. I

    F = del(p.E) and F = (p.del)E are equivalent

    Question: In the electrostatic case, the expressions F = del(p.E) and F = (p.del)E are equivalent: I am having trouble with how to show they are equivalent In the second equation, I expanded it out to give F= px (dE/dx) + py (dE/dy) + pz(dE/dz) Any help as to how to do this would be...
  42. D

    Engineering S-Domain mesh equations and equivalent circuit

    Homework Statement For the circuit given in Fig 15.53, (a) draw the s-domain equivalent; (b) write the three s-domain mesh equations; (c) determine i1, i2, and i3. Homework Equations Laplace Transform table Zc=1/SC Zl=SL The Attempt at a Solution I have uploaded my work but what...
  43. O

    Re- equivalent for a common emitter

    The questions is in the thumbnail, please tell me am I correct.thanks
  44. S

    MHB Convert the following numbers to their floating point binary equivalent.

    Convert the following numbers to their floating point binary equivalent. Can someone check my work? a) 18.25 so I got 10010.01 I couldn't find an online conversion calculator anywhere. can you also check my answer for this one? b) 1027.375 I got 10000000011.010
  45. J

    Equivalent continuity definition

    For every interval [ f(a)-e, (fa)+e ] there exists an interval [ f(a-d), f(a+d) ] such that [ f(a)-e, (fa)+e ] includes [ f(a-d), f(a+d) ] is this definition equivalent to the epsilon-delta definition?
  46. X

    Transformer equivalent circuit open and closed circuit test

    I see the open and closed circuit test on the transformer section I don't understand why we doing that(open and closed circuit test) can anyone explain and give some example?
  47. B

    Are the following statements all equivalent?

    1) Peano axioms for the natural numbers 2) Well-ordering principle 3) Principle of mathematical induction 4) Principle of complete induction Are they all equivalent? I'm going to attempt to prove them if they are, but I'd like someone to point out whether they are or not. I've heard that...
  48. M

    Space of lipschitz functions: two metrics are topologically equivalent

    Homework Statement . Let ##Lip_{M}(ℝ)##={##f: [0,1]→ℝ : |f(x)-f(y)|≤M|x-y|##}. Prove that ##(Lip_{M}(ℝ),d_∞)## and ##(Lip_{M}(ℝ),d_1)## are topologically equivalent but not equivalent. ##d_∞(f,g)=Sup_{x \in [0,1]}|f(x)-g(x)|## ##d_1(f,g)=\int_0^1 |f(x)-g(x)|dx## The attempt at a solution. I am...
  49. A

    Engineering Find T-Network Equiv of ∏ (Pi) Network - AC Equiv Circuits

    Homework Statement Determine the T-network equivalent of the ∏ (Pi) network shown in the Figure? Homework Equations I started working on this question and don't know if I am heading in the right direction. The impedances of the T network (Z1, Z2, Z3) can be found from the impedances of the...
  50. M

    Proving that two metrics are topologically equivalent

    Homework Statement . Let ##(X,d)## a metric space and ##f: X→X## an injective, continuous and open function. We define ##d' : XxX→ \mathbb R_{≥0}## as ##d'(x,y)=d(f(x),f(y))##. Prove that ##d'## defines a distance and that ##d'## is topologically equivalent to ##d##. The attempt at a...
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