What is Yield: Definition and 222 Discussions

In viticulture, the yield is a measure of the amount of grapes or wine that is produced per unit surface of vineyard, and is therefore a type of crop yield. Two different types of yield measures are commonly used, mass of grapes per vineyard surface, or volume of wine per vineyard surface.The yield is often seen as a quality factor, with lower yields associated with wines with more concentrated flavours, and the maximum allowed yield is therefore regulated for many wine appellations.

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  1. D

    Hill and BBC Yield Criterion, Hardening Models

    Sorry - I didn't post according to the template as even though this is a homework/coursework question; it's not as black and white as a question and answer! I am doing a piece of coursework, or research if you like, for university. The purpose of it is to investigate how the results of FEA...
  2. L

    Finding a max load from the yield stress

    1. Homework Statement I have a bar, 500mm long (0.05m) 10mm wide (0.01m) and 3mm deep (0.003 m)The bat has a load applied in the centre of 30nI know the maximum yield stress is 150 mpa 150x10^6How do I calculate the maximum load the bar can take?2. Homework Equations I used stress = m y / I3...
  3. L

    Finding the maximum load of a bar from the yield stress

    Homework Statement I have a bar, 500mm long (0.05m) 10mm wide (0.01m) and 3mm deep (0.003 m) The bat has a load applied in the centre of 30n I know the maximum yield stress is 150 mpa 150x10^6 How do I calculate the maximum load the bar can take? Homework Equations I used...
  4. H

    Strengthening, crystalline alloys, and yield strength questions?

    Hi, these are questions from my exam from the mechanical behavior of materials. I seriously screwed the exam up. Can you guys help me out? a) Provide two reasons why C is more effective than Ni in strenghtening Fe. b) Explain why single crystalline alloys with fine grains are more...
  5. R

    Finite element methods for Yield Line Analysis

    Hi All, I'd like to what kind of steps need to be taken to accurately estimate the yield lines of RC structures. My intention is, to know what type of loading is acting on beams transferred from slabs. I know how to formulate thin/thick plates and shells. The results converges with commercial...
  6. S

    Probability that a measurement of Sx will yield hbar for this state

    Homework Statement Alright, so there is a problem in the Townsend quantum mechanics book that reads: What is the probability that a measurement of Sx will yield the value hbar for this state: The state is given by: |ψ> = 1/sqrt(14) * (1,2,3i) (But the vector is represented as a...
  7. T

    Using Stress/Strain Curve to Find Yield Strength and Modulus of Elasticity

    Hey guys, I recently did a compression lab with different materials (wood and pvc pipe) and I have to plot the stress/strain curves given the data collected, as well as find yield strength (0.2% offset), ultimate compressive strength, and modulus of elasticity. I've already calculated...
  8. B

    Greater than 100 percent yield (102%)

    Homework Statement Cu(s) + 4 HNO3 (aq) Cu(NO3)2 (aq) + 2 NO2 (g) + 2 H2O (l) Cu(No3)2 + 2NaOH -------> Cu(OH)2 + 2NaNO3 Cu(OH)2→CuO + H2O CuO + H2SO4 -> H2O + CuSO4 CuSO4(aq) + Zn ( s) ------- ZnSO4 (aq)+ Cu(s) I carried out the follow reactions using copper as an inital product and my...
  9. V

    Calculating torque from yield stress understanding

    Hello, I'm new here and so if I've put this in the wrong section or anything, please let me know and I'll fix/change whatever needs to be done. I just wanted to see if someone could help me understand something. When choosing a torque value, is it just ~90% of the yield stress of the...
  10. H

    Does a cube of aluminum yield in the sea?

    Homework Statement A cube of aluminum is suspended deep in the ocean. Will it yield if it is placed deeper and deeper in the ocean? Homework Equations The Attempt at a Solution I guess that it will yield since the pressure from water will be stronger as it goes deeper...
  11. L

    Economics - Rate of return & Yield Rate

    You are considering purchasing a 274 day treasury bill that has a maturity value of 100000, The yield rate of interest on the 274 day treasury bills is 5.48%. Suppose you paid 96050 for a 274 day treasury bill with a 100000 maturity value and you sold it 150 days later for 98190.81. Calculate...
  12. K

    Wind Turbine Energy Yield Calculation at a Given Site

    Homework Statement I need to find how much energy will be produced (at least approximately) at a site with the following characteristics (this is taken from the German Renewable Energy law): “The reference site shall be a site determined by means of a Rayleigh distribution with a mean...
  13. S

    Tresca Yield Stress Question: Finding Maximum Compressive Stress

    Homework Statement Hi there if you have something that has 3 principle stresses on it, 200MPa and 50MPa and one is a compressive stress, what is the largest value of compressive stress using the tresca theory when the yield stress is 300MPa? Many thanks Homework Equations The...
  14. V

    How does a matrix times a vector yield a vector?

    The title pretty much sums up my quandary. I'm confused as to how a vector "x" with the same number of elements as columns in matrix "A" could yield a vector "b" when multiplied together. I mean, what's stopping "b" from being a matrix instead?
  15. K

    Polymer Engineering question related to Von Mises yield criterion

    It is a proof question. Does anyone can tell me how to do this question?question 22.2 it is the question for extra credit for my final exam. thank you so much.
  16. G

    Hydrogen peroxide reactions that yield high energy

    Let's say I have a solid, and hydrogen peroxide. I slowly release the hydrogen peroxide onto the solid, and both rapidly decompose yielding various compounds (I believe two will always be water and oxygen gas when dealing with hydrogen peroxide). What (solid) compound should I use to release the...
  17. I

    Heat engines: how can we yield work?

    So, I'm studying for the MCAT. There..I've said it. :) But, it's not a homework question: I just don't understand the concept. My study book's thermodynamics section includes a very rough sketch of a heat engine to describe the 2nd Law of Thermodynamics. A side note in the text says that if...
  18. B

    Integrating the following delta dirac function should yield min(t,s), but how?

    Homework Statement I need to understand how to integrate \int_{0}^{t}\int_{0}^{s} \delta(\tau-\tau')d\tau d\tau' The solution is min(t,s) Homework Equations See aboveThe Attempt at a Solution min(t,s)
  19. K

    Help with a proof of the yield curve.

    Homework Statement I need to show that the yield curve defined by r(t) = 1/t integral r(s) ds from 0 to t is a nondecreasing function iff: P(αt) ≥ (P(t))^α, for all 0<=α<=1 , t>= 0 and P(t) is defined as: P(t) = exp{-integral r(s) ds from 0 to t} and r(s) is the spot rate...
  20. M

    Yield stress from tensile test and yield stress from hardness tests

    Why can there sometimes be a difference observed between them?
  21. Ivan Seeking

    Yield vs elasticity in aluminum

    I have an application that involves forming 2024 aluminum in the T42 state. I need to determine [approximate] the amount of elastic stretch vs yield once the yield point has been exceeded. In other words, once beyond the yield point, how much of the strain results in addional yield, as opposed...
  22. W

    What does an infinite sum of uniform random variables yield?

    Hey everyone. I haven't taken statistics yet, but as a matter of interest I was contemplating the fact that uniform random variables added together seem to generate "bell curve" like distributions. My question is if I add up an infinite number of equally distributed random variables will the...
  23. S

    0.2 percent offset for computing the yield point

    I need to compute the yield point for an experimental true stress vs true strain plot of a material as attached in the screenshot. See attached; I have true stress vs true strain plot. I took some initial points on the curve and fitted a straight line which gives me the elastic part of the...
  24. U

    Effect of Strain Hardening on Yield Strength

    Homework Statement The strain hardening behavior of an annealed, low‐carbon steel is σ = 100,000ε0.2 If a bar of this material is initially cold worked 20%, followed by additional cold work of 30%, determine the probable yield strength of the final bar. Homework Equations σ=κεη...
  25. M

    [Material Science] Thin Walled Cylinders & Yield Criterion

    Homework Statement A long cylindrical boiler shell is 1.75 m in diameter and has a wall thickness of 12 mm. Treating the boiler as a thing shell, predict what internal pressures will produce yield in the shell according to the: (a) Rankine, (b) Max. Principal Strain, (c) Tresca and (d) Von...
  26. N

    Confidence in investment yield, betting

    Hi everybody, I'm a physicist, not a statistician, by training and my knowledge of statistics is severely limited. I indulge in sports betting where I typically bet on the exact score of a game. To see whether my approach works I have to know whether I'm winning or not - to be precise, I must...
  27. K

    Calculating % Yield of Ester in Chemistry Lab

    % yield ester I'm having a problem with my chemistry lab report. the question is: What would the % yield of ester be if the reaction were simply allowed to equilibrate (i.e. no products are removed)? I think the the yield is going to smaller but i don't know why. pls help
  28. M

    How Does Irradiation Affect Yield Strength in BCC and FCC Structures?

    I have a question about source hardening: what is the reason for a decrease on the yield strength in the case of the 1-(Un-irradiated) Body centre cubic (bcc) 2- (irradiated) face centre cubic (fcc)
  29. G

    Producing Phosphoric Acid: Calculating Percent Yield

    Approximately 12 million kilograms of phosphoric acid (H3PO4) are produced annually for fertilizers, detergents, and agents for water treatment. Phosphoric acid can be prepared by heating the mineral fluoroapatite (Ca5(PO4)3F) with sulfuric acid in the presence of water. Ca5(PO4)3F + 5H2SO4 +...
  30. K

    Calculating Highway Truck Length for Nuclear Bomb Yield

    Homework Statement The energy released by nuclear bombs is measured in kiloton (kt) or megaton (Mt) units. One kiloton is a unit of energy released by 1000 tons of trinitrotoluene (TNT). One kiloton is 4.2×1012 joules. The yield of fission bombs is typically between 10 and 500 kilotons, the...
  31. G

    Fan failure and yield strength

    What will fail if the aluminium impeller rotating at 7500 rpm and powered by 355 kw motor strikes against the stationary 10 mm thick ms plate welded at both the ends having length of 350 and width 200 mm and impeller blade is 12 mm thick. I am confused in first glance we think that blade will...
  32. K

    Product ideals that yield reduced quotients

    Homework Statement Let I,J be ideals in a commutative ring R. Assume that R/(IJ) is reduced (so that it contains no nilpotent elements). Prove that IJ = I \cap J Homework Equations For two ideals I and J, we have IJ = \left\{ a_1 b_1 + \cdots + a_n b_n : a_i \in I, b_i \in J, i=1,\ldots,n...
  33. K

    Naphtalene solid state Quantum Yield

    Hi guys, first of all I want to say that this forum saved me several and several times and I love it. I have a question for you related to absolute quantum yield of naphthalene determined with an integrating sphere. Do you have an idea how much should be? COuld you pass me a reference paper...
  34. V

    Higgs and Antimatter explosive yield

    http://science.discovery.com/tv/through-the-wormhole/episodes/what-are-we-made-of/ Discovery channel is running a very excellent episode on particle physics & the LHC hosted by Morgan Freeman and they mentioned something which I want to inquire further. It is mentioned in the program that...
  35. T

    Designing a Reinforced Concrete Beam: 8.2m Span, C30 & High Yield Steel

    a beam with an effective span of 8.2m is required to carry uniformly disributed loading of gk = 12 kNm-1(in additon to its own self weight) and qk = 10kNm-1. design a suiable reinforced concrete beam using strength class C30 concrete and high yield reinforcement could somone check my...
  36. M

    Calculating Yield of CuSO4 Crystals from Reaction of H2SO4 and CUO

    I was tasked to calculate the yield of CuSO4 by the reaction of H2SO4 and CUO. My equation says the it should get CUSO4 and H2O. But should we use CUSO4.5H2O for theoretical yield instead since it is a crystal that we are calculating - if so then I could not balance the equation... what...
  37. K

    Speculation: Highest yield nuclear weapons in existance

    Since the cold war nuclear race we haven't really heard much about nuclear weapons development, but i imagine that the technology is pretty far ahead today compared to what it was when they detonated Tsar Bomba in 1961, which was a 50 mt. hydrogen bomb with a design that allowed 100 mt. So i...
  38. J

    Yield strenth of E-Glass Fibre

    I have every possible value and propertie for E-Glass fibre but i can't find yeild strength anywhere anyone know it?
  39. J

    Yield Line Analysis Of Concrete Slab, .

    Homework Statement We were given many different slab sizes, shapes etc and asked to analyse them using Work = Energy equilibrium checks to find q, the maximum load per m^2 the slab can take. The first part was to show the fracture lines to use for analysis but I am stuck on one of them. I have...
  40. A

    Theoretical Yield of CaCO3: Calculate & Round

    Homework Statement What is the theoretical yield of calcium carbonate if 2.07 grams of calcium chloride dihydrate reacts with excess sodium carbonate according to the balanced chemical reaction shown below? Homework Equations Please use molar mass values calculated and rounded to the...
  41. B

    Calculating Theoretical Yield for Copper Reactions: Help with Homework

    Homework Statement Here's the measurements from my expirement. (reaction 1) 0.548 g Cu (s) 4.0 mL HNO3 100 mL DI water (reaction 2) 30 mL 3.0 M NAOH (reaction 3) nothing was added. (reaction 4) 200 mL of DI water 15 mL of 6.0 M HCl (reaction 5) 2.095 g Zn 10 mL 6M HCl 5...
  42. FtlIsAwesome

    Comparison of thermonuclear and antimatter explosions of equal yield

    Hi This is my first post, and I have a lot of ideas to talk about I'll start with this one: What would the difference be between a thermonuclear explosion and an antimatter explosion, of equal yield (say 2 megatons each), and similar location and weather? I think that the each would have a...
  43. S

    Shemy's Puzzle: Calculating Yield Stress for a Metal

    Right this is the question, Determine the yield stress for a metal with an average grain diameter of 0.045mm, if the yield stress for a metal changed from 650Nmm^-2 to 720Nmm^-2 when the average grain diameter decreases from 0.054mm to 0.037mm. I cannot figure this out, I've been trying...
  44. D

    Specific Yield Strength Question for A572 material

    My industry (tubular steel poles) standardly uses A572, Gr65 and A871, Gr65 for shaft design with the designs taken to the minimum ASTM defined Yield and using loading factors in the design. The A572 specification has for years listed all grades as "Yield Point". The A871 specificaion (which...
  45. A

    Why Do Metals Like Fe-C Show Upper and Lower Yield Points?

    Why do Fe-C and other metals exhibit upper and lower yield points? And also can you get substitutional solid solution in any Fe-C metals, like ferrite, austenite etc?
  46. P

    Calculating Percent Yield of Al2O3

    Homework Statement If the reaction of 2.5 g of Al with 2.5 g of O2 produced 3.5 g of Al2O3, what is the percent yield of Al2)3? Be sure to write and balance equation. Homework Equations Percent Yield = (actual yield / theoretical yield ) x 100 The Attempt at a Solution 4Al + 302...
  47. H

    Calculating the explosive yield of an atomic bomb

    Homework Statement I'm writing a paper on the Manhattan Project, and as part of this paper I am asked to show: "... calculations that can help illustrate the explosive power of an atomic bomb compared to ordinary explosives."Homework Equations Released energy per fission: Q = \Deltam * c2 The...
  48. C

    Calculating % Yield of NaN3 Experiment

    Homework Statement Use the unbalanced equation NaN3 → Na + N2 to answer the following question(s). The % yield of an experiment in which two moles NaN3 was used and 21 g nitrogen was isolated is ________.Homework Equations percent yield=({actual yield}/{theoretical yield})100% The Attempt at...
  49. mheslep

    NIF Laser sets records for neutron yield

    http://www.physorg.com/news/2010-11-laser-neutron-yield-energy.html DT produces 17 MeV per fusion, so that's an output of about 800 joules; a factor of about 150X short of break even for energy applied to the target, and perhaps ~1000X short of the gain required for a practical fusion power...
  50. I

    How To Calculate Percentage Yield?

    I'm given that Copper sulfate + sodium carbonate --> copper carbonate + sodium sulfate. Mass of Sodium Carbonate 1.460g Volume of copper sulfate 28.50 mL Actual yield of copper carbonate is 0.15g The question is using your data and knowing that sodium carbonate was in excess...
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