Material Definition and 1000 Threads

Hi, I will be enrolling in an Analysis I course (highly theoretical calculus course, emphasizes proofs) at UofT this upcoming fall and was wondering if there are any materials that can adequately prepare me for this course.

Hi All, I'm wondering if anyone is aware of a piezoelectric material that is both liquid and is transparent/colorless/ lower refractive index? Is there database online where I could compare these values? Google has not been kind to me:( Any help would be so appreciated.

Right now I am working on a small project. I have a board (made of PVC) that is nearly 3ft long (1ft wide) and supported on each end. Mounted to the board will be various items. To save money and weight I am looking to calculate the minimum thickness I need so that the board can support...

Is there any material that can be ionized (plasma state) at realtively low temperature, say 30 or 40C?

Time and time again I am forced into purchasing a new hockey stick simply because the bottom of my hockey blade wears out. This is a common problem with any hockey stick which hockey stick manufacturers love as it keeps you purchasing more sticks frequently. Are there any suggestions of a very...

Lets say you have a block of iron with a mass "m" exposed to an infinitely strong magnetic field "B." If there was a strong wooden interface preventing this iron block from moving towards the magnetic field source, how can you calculate the force the iron block would exert on the wooden board?

I'm currently designing an observation deck as a project. We have to consider a strong, light and cheap material that will hold 15<x<25kg. I considered bamboo, any other ideas?

Hi, I want to use piezoelectric material to harvest compression energy, i need to calculate the power output but i can't find enough information on the web to figure it out... First, I want to learn how to calculate the power output of piezoelectric material using d33 and g33 data...

I'm interested in building a forge, mainly for flux crystallization of corundum (ruby/sapphire), but I want it to be versatile. General Requirements: Withstand temperatures up to 1400 C (2550 F) for months at a time (crystallization can have very slow kinetics) Walls with a thermal...

Hey guys, I am new to this forum so I don't know if this is the correct place to post this thread. Anyways, I was wondering what kind of material would be better for a milkshake straw. Would a highly thermal conductive material (like silver) or a thermal resistant material (like glass) be...

As a material is heated, it increases in temperature until it enters a phase transition. During the transition, added heat does not increase the temperature. As this heat is being added, what is the substance? Is it a mixture of liquid and gas perhaps? If so, what are the proportions? In...

for my senior project in mechanical engineering .I'm thinking I'd like to design a machine for recycling .Basically ,different kinds of garbage can be thrown into it and separation of the materials for recycling is done by the machine .I'm not sure how to go about it though .I'm thinking the...

If I have a rod with a steel core bonded to an aluminum shell, how can I find the stress in the rod when it is subjected to a temperature change? I know how to find the stress due to temp change if the tool is made of the same material throughout, but how do I do it if there are two? I...

Can anyone give me links with supplementary notes and problem sets for math 55? Of course I'm no harvard student, I'm just a physics major with an interest in math. Thanks in advance! ^_^

Hi guys, I'm doing a quantitative finance research project that is based on the following papers: "Systemic Risk and Sovereign Debt in the Euro Area" - Deyan Radev (can be downloaded here: Systemic Risk and Sovereign Debt in the Euro Area by Deyan Radev :: SSRN) and "Consistent Information...

Source: Max Planck Institute for Chemical Physics of Solids, Dresden, Germany The Max Planck Institute for Chemical Physics of Solids in Dresden, Germany, offers excellent research possibilities for students to obtain a PhD degree in a three-year graduate program in collaboration with the...

Does anyone have any information on what the clear plastic cases (lens, capsule, w/e) are made of for LEDs? Google says it is some sort of epoxy, but I also read somewhere a while ago that sometimes it is acrylic. Is this true, and can you buy LEDs anywhere that are made of thermoplastic like...

What is the Difference between Substrate & Base material in Printed Circuit Board? What is the difference between Substrate material in PCB and in semiconductor [VLSI] ?Is the VLSI substrate Cu plate? Is the substrate of VLSI a fibre glass or it is something else? What is the base...

Is there any material in the world which cools when it is heated?

Different materials emit different frequencies of radiation when heated by a source of heat such as electricity. Examples include gases and solid filaments that emit infrared, visible and ultraviolet radiation, and the scheelite calcium tungstate filaments used to produce x-rays in fluoroscopes...

Hello everyone! What materials are used for making optical filter glasses? I bought this: http://www.alibaba.com/product-gs/495852853/Digital_Camera_lens_43mm_950nm_IR.html and took its transmission spectrum. So, it reminds me a transmission spectrum of CdTe. But a-CdTe is more...

i want to compare force on current carrying conductor , 1)placed in air surrounded by magnetic field 2)placed in the cylindrical cavity(without air gap but some electrical insulation) which is placed in magnetic field. please give me practically calculated answers with calculations.

I'm trying to get a constitutive model for a material based on some uniaxial test results obtained from one of my professors. However, I'm not able to obtain a working model with the data. I get a warning message about the model becoming unstable at the following: UNIAXIAL TENSION: 0.210E+00...

Hello Physics Enthusiasts The other day I received in the mail a uranium ore sample from United Nuclear, with a radiation measurement of 2,500cpm, intending to use it as a particle source for my replication of the famous Gold-Foil experiment, the theory for which was devised by Ernest...

In this question below in the 2 files, i have a problem with the ( Q ) in the shearing stress.. can someone help me and explain for me how they get [Q=(32)(30)(15)] for point (a) and how about point (b) also !? what i know that Q=A.y , how did they get (32)(30) for the area and (15) for the...

In this question below in the 2 files, i have a problem with the ( Q ) in the shearing stress.. can someone help me and explain for me how they get [Q=(32)(30)(15)] for point (a) and how about point (b) also !? what i know that Q=A.y , how did they get (32)(30) for the area and (15) for the...

Hi all, I am in a search for a material that is transparent in UV wavelengths, but reflect light in the visible wavelength (e.g. the opposite of standard glass). does anyone here know of such a material? Thank's in advance

i have a case study on a crankshaft. i have completed the service requirements but i have no idea about what i am supposed to do for the material requirements. the question is: Discuss and identify the material requirements for the component by relating the material property requirements to...

Homework Statement A extremely strong wire of exotic material has a radius of 0.1 mm and a length of 5 m. A 1000 kg mass is hung vertically from the wire. The speed of sound in the wire is observed to be the same as the speed of a transverse wave on the wire. What is the Bulk Modulus of the...

Hey, I need to know the effect ( capillary rise) due to different materials on capillary action. Also, what is the reason behind it, not so complex, just in simple language. It will be more good if I'll get the practical and calculated values of height in capillary tube of different...

Hi, I was just wondering if it was possible to change the linear expansion (and expansion in volume as volume expansion is three times the linear expansion) of a certain material. The coefficient being; a = (Final Length - Initial Length)/ (Initial length) * (ΔT) Is it possible to...

the problem says \(y=f(x)\) and find the value of \(\int_{-\infty}^{\infty}f(x)dx\) if it converges \[f(x)=\begin{cases}2-e^{-0.2x}&\text{ for } x \ge 0\\0&\text{ otherwise} \end{cases}\]...help

Homework Statement So, I was sitting in my algebra based college physics class and we were talking about buoyancy. According to Archimedes' Principal, "an object that is completely or partially submerged in a fluid experiences and upward force equal to the weight of the fluid displaced."...

Hi, I'm writing a term paper and am having a lot of trouble understanding what is meant by the real and imaginary parts of various quantities. It seems a lot of textbooks have their own conventions and it's hard to understand whether they've redefined some symbol when they "complexify" them...

as title.. are there any books with recent info re. current thinking about space/time..origin, structure etc... cheers

Would a "molecule thick" blade separate material by enough distance to damage it? I don't know if this should be in general physics. In science fiction the concept of a "mono-molecular blade" exists, this being a blade with an edge that it the thickness of a single molecule, or thinner...

Just wondering what the name of the component as a whole is? And what is it made of? Also, if you could tell me the name of all the constituent parts, that would be great...

Hello guys. Since this is my first post and I can't post in Pre-calculus Learning Material, I shall post it here.Now, to the topic. I am passionate about learning maths, however, because I live in Australia and go to public school, the level of maths that they teach is miserable (Year 9...

Hi, I have been using a tensiometer to help me try and determine what the material is. one of the materials has been heat treated and and instead of a nice necking formation in the middle of the "dumbell sample" it has fractured perpendicular to the sample right next to the chucks of the...

Hello Everyone I am looking at equations of colliding particles in a granular gas and wondering how to calculate them. We assume that the grains are identical perfect spheres (in R^3) of diameter D>0, (x,v) and (x-Dn,w) are their states before a collision, where n ε S^2 is the unit vector...

I was very shocked by the class averages and curve for my quantum mechanics course. The exam was curved to (brace yourselves) 55/100 as an A. Yeah. Kind of shocking, frankly. Of course, the class average was 47.5 or something on that order. My own score was an 80, which I'm not terribly happy...

Hi all, I'm a first year mech eng student starting a mid-term assignment which is a report into the durability, machinability and cost of 3 different materials. First off, I'm looking for a durability index for different materials; brass, aluminium and plastic (ABS) What is the procedure...

When given a cylinder with radius, height and thickness, how does one go about computing the amount of material used in making the cylinder? Initially I thought the amount would be: Material=2\pi r^{2}t+2\pi r h t where t is the thickness of the cylinder. Looking at this equation...

Hello, I am currently assigned to perform a drop tests on a unit that we sell. Thing is that I am an Electronic Engineer so I am not best at mechanics. I am wondering whether you can calculate forces and required material strength to withstand the drop test. The reason I am asking is...

I'm using Ansys Workbench V.13, when I use library of explicitmaterial I saw that Unit of True Strain is Mpa ?! And if we can't trust this strain-stress curve,please tell me, where can I find aluminum 1100 strain-stress curve ?

Hello, I'm new in here. And now i am in research about elektron transfer between solid material. Is this possible and reversible ? Does anyone ever try this ?

Hello All. I am getting my @$$ kicked by what seems to be a simple concept, and I hope someone can offer me a little help. With some of the nickel based super-alloys such as what are used in turbine blades, why do the alloys get stronger as they get hotter? It seems counter-intuitive to me...

I'm a bit confused about the effect of the size of ferromagnetic material on the magnetic field it generates so I was hoping someone could explain it to me. The saturation magnetization is given by M = \frac{N}{V}*μ but this suggests that the magnetization is independant of the size of...

Homework Statement I need to write a program that, given the decay constant of a radioactive material, will calculate numerically (to withing one second) the time taken for half of the orginal sample of material to decay.Homework Equations λ = decay constant C0 = start amount of material...

Homework Statement Everything needed is written in the question ( Open the attached image ) Nyhow the required is to find the value of P.Homework Equations Shear stress = \frac{ \Delta V }{\Delta A} eq 1 normal stress = \frac{ \Delta N }{\Delta A} eq 2The Attempt at a SolutionFor the...