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. A

    Finding the maximum load of a bar from the yield strength

    I have a flat steel bar (30 mm width, 5 mm thick, 1100 mm long). The bar has a load applied in the centre of 100N. the bar is fixed at both ends with a single concentrated load P applied mid-span the maximum yield stress is 250 MPa (250x10^6 Pa) How do I calculate the maximum load the bar can...
  2. A

    The yield strength at temperature SA-789/SA-789 М

    Hi! Could you help me to find the yield strength at temperature SA-789/SA-789 М.
  3. S

    Why does this anticommutator yield this particular result?

    I was calculating the anticommutator between the momentum operator p and the position operator x (just pretend that p and x have the little operator hats above them). Here is the expression: {p , x} = px + xp Now we know that p is as follows: p = -i(∂/∂x) (Note: I am using natural units...
  4. R

    Unraveling the Stress-Strain Curve: Find Young's Modulus & Yield Strength

    Homework Statement The figure shows the stress-strain curve for a material. The scale of the stress axis is set by s = 280, in units of 10^6 N/m2. What are (a) the Young's modulus and (b) the approximate yield strength for this material? Homework Equations E=stress/strain The Attempt at a...
  5. F

    Why ultimate load is less than yield load?

    i have made a beam with both ends fixed. when I apply load at center then the ultimate load will be 8Mp/L=8fyz/L which came to be 440KN My question is how to calculate the load at which beam starts yielding? I have used E=200000N/mm2 and initial yield strength=220N/mm2
  6. S

    Maximum stress as percentage of Yield Strength

    Homework Statement Hi guys, I have a question here, which asks me to express the maximum stress from my simply supported beam, which I worked out to be 1.165MPa, to be expressed as a percentage of the Yield strength 95MN/m^2. I also have a follow on from that which asked me how much the...
  7. L

    What Is the Percent Yield from Aluminum to Potassium Alum?

    Here is the question: If 75.0 g of potassium alum is obtained from 5.00 g of aluminum, what is the percent yield? This is what I've done so far, but I'm not sure if it is fully correct: 5.00g Al x (1/26.98156) x (1/1) x 258.207 = 47.84882537g potassium alum Wouldn't this then be the...
  8. G

    How to Determine Weight Capacity of Carbon Steel Pipe Rack: Guide

    i have built a pipe rack made out of carbon steel and needing to know how to figure out how much weight it will carry. the longest horizontal piece is 4" sch 40 x 60 inches long welded to 8" sch 40 carbon steel. just trying to see if there is a chart of some sort
  9. B

    Spec yield and ult strengths - true or engineering stress?

    Are the yield and ultimate strengths that you find in specs (e.g. ASTM A36) true stress or engineering stress values? Thanks! Andrew
  10. Q

    Is it well analyzed? Doubt about a bar: tension/compresion

    Homework Statement Calcular the force P when a bar starts yield, when 2 bars start yield, and when the 3 bars start yield Diameter = 25 mm (for every bar), Yield Stress of Steel = 250 MPa. Homework EquationsThe Attempt at a Solution [/B] [F][/AD] + [F][/BE] + [F][/CF] = P 2[Δ[/AD] -...
  11. Q

    How can I know which enters yield bar first?

    Homework Statement Homework Equations Area AD = Area BE E(AD) =E (BE) Yield stress = 250 MPa[/B] The Attempt at a Solution Delta= PL/(AE) if in both bars the A and E are the same, and from the equilibrium I get Q= 4.125 F(AD) + F(BE) , also from the compatibility I get delta AD = 4.125...
  12. George Zucas

    0.2% Offset vs. 0.5% Extension Under Load Yield Strength

    Hello everyone, I have designed a part that should be able to withstand a shear stress of 43 MPa ( give or take). The part will be made of Nickel Aluminum Bronze (CuAl10Ni5Fe4). When I check yield strength values for this material (I'll multiply it by 0.6 to estimate its shear strength), they...
  13. V

    Selective precipitation, purity and yield of precipitate

    Homework Statement An aqueous effluent contains 12 M Cd2+ and 10 M Mg2+ as solution of nitrates. Current practice is use NaOH to selectively precipitate the metals. (a) Is it feasible to get 0 Cd impurities in Mg ppt by using NaF instead of NaOH (back up your answer with adequate calculations)...
  14. T

    Will This Method Yield Absolute Synch?

    -simple procedure designed to absolutely synchronize clocks- Picture the face of a very large clock with a one hand. Let's place a small clock A at the 9 o'clk position of the large clock, and let's place another small clock B at the 3 o'clk position. We use clock A to time the large clock's...
  15. L

    Beer-Lambet Law and Quantum Yield

    Homework Statement A cell of length 10 cm, containing gaseous IBr at 300 K and 5 Pa pressure is irradiated by a continuous wave laser operating at a wavelength of 532 nm and a power of 5 W. (i) Calculate the energy of the photons. Express your answer in units of J, cm-1 and eV. From the power...
  16. R

    Calculating Yield Strength for Dowell Pins

    So how do I figure out if say a part is being made with a .250 round dowell pin at 100,000 yield strength and I want to use a material at 60,000 yield strength how much bigger would I have to make the dowell pin to achieve the same yield strength?
  17. W

    Which stress counts when looking at yield

    To makes things simple, consider a simple beam fixed at one end an a load applied at the other. This load will produce shear stress, bending stress, and torsional stress. When looking at yield at the fixed end, do I take the biggest stress of the three or do I add their magnitudes to see if it...
  18. J

    Percent Yield - Unsure of Which Molar Mass to Use

    Homework Statement A percent yield lab says to add 5.00 g of CuCl2•2H2O(s) to 50 mL of dissolved water. Then, add 1.0 g of steel wool (100% iron) to the beaker. I am trying to find out how many moles of CuCl2 react here. I am confused about the dihydrate. Homework Equations The reaction given...
  19. O

    Calculating Percent Yield of PbI2 in 2CsI + Pb(NO3)2 Reaction

    Homework Statement In one experiment, 22.9841 grams of 75.25% pure Pb(NO3)2 (pure Pb(NO3)2 has a molar mass of 331.2 grams) was mixed with 51.2354 grams of 81.21% pure CsI (pure CsI has a molar mass of 259.80992 grams): 2CsI(aq) + Pb(NO3)2(aq) → 2CsNO3(aq) + PbI2(s) After the reaction...
  20. 1350-F

    Brittle Materials: Bending Yield Strength

    It seems to me that the ultimate strength of a brittle material can be easily determined by a bending test, but what about the yield? In the brittle regime, I can see how you couldn't, since the sample would fail before it would flow significantly. However, brittle materials can be made to flow...
  21. S

    In the haber process why is the yield higher when liquid?

    I know that setting the conditions so that the product is formed as a liquid will produce a higher yield in the manufacture of Ammonia, but why is this?
  22. 1350-F

    Differential Yield Stress and Von Mises Criterion

    If I have the differential yield stress σd=(σ1-σ3) for a material, what can I derive from that for use with the von mises criterion? Do I have k=0.5×(σ1-σ3) or σy in axial tension, where σ3 = 0? Essentially is my axial yield stress = σd or √3 × σd /2? (in plane stress)
  23. F

    Chemistry Theoretical Yield and Percentage Yield of Organic Molecules

    Homework Statement 1. A student investigated several esters, and made octyl acetate, an ester with the fragrance of oranges. The student used the acid derivative, acetyl chloride (as you saw decanedioyl dichloride used to make 6,10 nylon) and 1-octanol. Using the following information...
  24. N

    Finding yield strength with modulus of elasticity

    Homework Statement Grade 1020 Steel has a yield strength of 42ksi and E modulus of 30 mpsi. Another grade of steel has yield strength 132 ksi. What is its E modulus? Homework Equations E=FL/EA This is the equation i should be using to find e modulus I thing The Attempt at a Solution I don't...
  25. A

    Temperature dependence of the light yield in scintillators

    Hi, I have a question regarding the temperature dependence of the light yield in scintillators. I will attach a figure from the book by Glenn F. Knoll, So the question is, what is causing the reduction in light yield with high temperatures, when the decay time for the scintillation...
  26. D

    Calculating Stress Values for Cylindrical Steel Sample

    I have a cylindrical steel sample tested in tension. It's cross-sectional area is 500 mm2. I am also told that: Force at yield = 205 kN Maximum force = 258 kN Force at fracture = 200 kN I am asked to calculate the yield stress, ultimate tensile stress and fracture stress if the reduction of...
  27. F

    What " Yield " means in TENDL ?

    I'm reading the cross setion of p + 18O Total neutron production ftp://ftp.nrg.eu/pub/www/talys/tendl2013/proton_html/O/ProtonO18xs.html # p + 18O Total neutron production # Q-value =-2.51902E+00 # # # energies = 45 # E xs...
  28. T

    Is there an irrational multiple of another irrational to yield Integer

    This question specifically relates to a numerator of '1'. So if I had the irrational number √75: 1/(x*√75) Could I have some irrational non-transindental value x that would yield a non '1', positive integer while the x value is also less than 1/√75? Caviat being x also can't just be a division...
  29. A

    Quantum yield: fluorescence spectrum correction

    Hello, I hope all is well, I have a few questions regarding fluorescence spectral corrections. I have run into an issue with corrections on the instrument I'm using. I have obtained spectra for a few compounds where the correction was working properly and achieve the results as expected. When...
  30. H

    Why doesn't my result yield 9.8 m/s^2?

    A ball falling from rest is located 45meters below its starting point 3.0s later. Assuming its acceleration is uniform, what is it's value? (air resistance is negligible) Relevant Equations - Equations for uniformly accelerated motion Δd=(v1 x Δt)+(a x Δt^2)/2 Attempt To solve: v1= 0...
  31. A

    What Could Be Causing Fluctuations in Quantum Yield Measurements?

    Hello, I have been measuring quantum yields in the lab for quite some time and have occasionally been running into some difficulty with my fluorescence spectra. The intensity (CPS) of the spectra for the same molecule will remain the same under the same conditions most of the time; then, every...
  32. DocZaius

    Poisson vs Binomial approaches yield different results

    Homework Statement I made this question for myself to try to see if I could use two approaches (Poisson Distribution and Binomial Distribution) to solve a problem: Someone's average is to make 1 out of every 3 basketball shots. What are the chances she makes exactly 2 shots in a trial of 3...
  33. G

    Do you just multiply the Yield strength by the thickness?

    The term yield strength is always bugging me deciphering the actual use in some cases. If I had a plate 3m x 2m 30mm material of Yield Strength 355N/mm², does this mean the maximum allowable force at one point on the plate is 10,650N (355 x 30mm), not taking into account safety factors...
  34. M

    Why Does Mild Steel Only Have One Yield Point?

    Homework Statement I had a Young's Modulus experiment in lab. Our specimen, which was used, was mild steel. After plotting the graph I realized that there was only one yield point. However, as I read from many sources, there must be two yield points for mild steel(upper and lower). I am pretty...
  35. A

    How do i calculate or find out the yield stress of sugarcane?

    Hi, from what I know, the crushing force for sugar cane is somewhat similar to pine wood which is about 40 MPA. But since there's water content in it, I need to readjust the yield stress for to crush the sugarcane. I've tried googling it but couldn't find much useful information. Anyone knows...
  36. MarkFL

    MHB BAM's question at Yahoo Answers regarding maximizing the yield of an orchard

    Here is the question: I have posted a link there to this topic so the OP can see my work.
  37. J

    Obtaining yield stress knowing only Poisson's ratio and UTS?

    Greetings all, I have been trying to find a method of calculating the yield stress for a material when only given; -The loading type (Two bars soldered together in tension) -The dimensions of the shaft and solder (ie thickness of solder, length, cross sectional area) -The Ultimate...
  38. G

    Why does bringing N 1-orbital atoms together yield N levels?

    A common example of this is that when bringing N hydrogen atoms together into a ring. Far apart, assume each electron exists in the 1s state. As we bring them together, instead of each electron staying at the original 1s level, or all of them changing by the same amount, the 1s level fans out...
  39. P

    Finding percent yield of Alum?

    Homework Statement Find the percent yield of alum In an experiment to synthesize alum I started with 0.766g of aluminum and made 8.246g of alum Homework Equations 2Al + 6H20 + 2KOH ---> 2KAl(OH)4 + 3H2 The Attempt at a Solution First I find the LR. Which in this experiment is...
  40. D

    Non-Parametric Testing for Widget Defectivity: Sample Size Considerations

    Hi all. I'm trying to come up with a way to determine if the defectivity of a particular widget is 'different' to the usual defectivity of a widget. The difficulty comes from the fact that widgets are made in batches of 25. We'd like to investigate any widgets which have a higher (or lower)...
  41. P

    Why Mild Steel has two Yield Points ?

    Why Mild Steel has two Yield Points ? :confused:
  42. J

    MHB Math Word Problem - price and yield of T-bill

    A T-bill with face value of \$10,000 and 96 days to maturity is selling at a bank discount ask yield of 4.3%. A. What is the price of the bill? (use 360 days a year) B. what is its bond equivalent yield? A. .043 * (96/360) = .011 .011 * (1-.043) = \$9,890 B. 1.1% * (365/96) = 4.182%. Are these...
  43. B

    Calculating Moles Ratio of Reactants for Yield f in K Equilibrium

    If I want to calculate the number of moles ratio of reactants which, in a reversible reaction of equilibrium constant K, will give me a certain yield 'f', what is the mathematical definition of the yield in this case? For instance, in the reaction A + B ⇔ C + D, let's say we can denote extent...
  44. O

    Calculate Percent Yield Questions: NaNO3 in Impure Substance (URGENT)

    % yield questions (URGENT) Homework Statement We have 3 equations: 1.64 g of an impure NaNO3-containing substance is reacted with Devarda's alloy. The amount of NH3 got from this reaction is reacted with 25cm3 1.00 moldm-3 H2SO4. The H2SO4 left over is reacted with 16.2 cm3 2.00 moldm-3 NaOH...
  45. xpell

    Fallout yield from a nuclear accident at sea?

    I was reading about the nuclear accidents in early Soviet submarines and got a couple of questions, hope this is the appropiate forum to ask them. :smile: Let's assume that a submarine suffers both a hull and reactor vessel rupture (for example, as a result of an attack in wartime) while at...
  46. P

    (2D problem) What angle will yield maximum horizontal range?

    Homework Statement A supply plane is flying at 60.0m/s at an altitude of 200.0m. What angle of flight will yield the maximum horizontal range for the dropped package? Homework Equations 1/2(g)(t)2. The Attempt at a Solution So far the only equations that i have, but may be wrong...
  47. S

    How to wire given resistors to yield a total resistance?

    Essentially I have been given five resistors of strength 180 kΩ, 220 kΩ, 270 kΩ, 330 kΩ, and 390 kΩ and have been told to devise a way to wire these to produce a total resistance of exactly 206.421 kΩ. I have been working on this simply using a guess and check method and have had no luck...
  48. S

    Calculation Based on Yield strength and Ultimate strength

    Hello Gurus, I am new to mechanical design calculations. Since I have came across one interesting fact there are two methods using for finding the shear capacity of the components. Yield Strength and Ultimate strength. Shear yeild strength=1/√3* Yield strength Ultimate shear strength=...
  49. A

    Initial yield stress Vs. tensile strength

    Are those the same? if not, how do I calculate the initial yield stress from the tensile strength? all the materials properties I see on the web only specify tensile strength, and I need the initial yield stress as an input on non-linear FEA analysis. Is it possible to extract the initial yield...
  50. M

    Mohrs Circle, Von Mises and Minimum Yield Strength Help

    Hi Wasn't sure where to post this, hope it's ok in here! I've gotten myself very confused as to how to find the minimum yield strength for an element. I have used Mohrs circle to find sigma1 and sigma2, then plugged that into the von mises equation to find sigma-von = 636.8MPa. The...
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