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...
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...
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...
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...
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...
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...
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...
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...
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...
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...
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...
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...
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?
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.
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...
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...
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)
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...
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...
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...
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...
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...
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...
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...
% 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
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)
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 +...
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...
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...
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...
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...
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...
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...
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...
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...
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...
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...
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...
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...
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...
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...
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?
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...
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...
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...
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...
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...