Materials Definition and 989 Threads

Hi all ,, i have a course on nature and properties of materials next semester,,If u guys can pls advice me some good book which have nice coverage of the following topics ,,it will be highly appreciated. ESO 214 NATURE AND PROPERTIES OF MATERIALS, 3-1-3-1-5 Examples of materials...

Hi I am trying to derive the relation between magnetic field strength in materials and magnetizing field from the $\mathbf B$ field. More exactly, my question is: how do we get this expression $\nabla \centerdot \mathbf H = - \nabla \centerdot \mathbf M$ \\ knowing...

If Aluminum and steel are connected as one rod, and are attached to the wall and is pulled upon. How would the change in length for each material of the rod be calculated? I'm given that the Aluminum section is twice as long as the steel section, and the total change in length of the whole rod...

I am interested in mangetostriction in antiferromagnetic materials and the machanism of it, would you like to give me some advice? Thank you sincerely.

I am designing an experiment to investigate how the number of beta particles scattered backwards depends on the thickness of a foil and the proton number of the foil material. I have an idea of what I will do, i.e. I will have the beta particles fired at the foil and place a GM tube next to the...

what are the materials needed to make a simple electromagnetic bell? pleasezzzzzzzzzzzzz i've searched all over the web and would you believe it, THERE ISN'T A SINGLE PLACE THAT EXPALINS HOW TO MAKE A SIMPLE ELECTROMAGNETIC BELL! i need to make one for this marking period, but I'm not quite...

i have attached a doc file. it shows two coaxial circular bars of different material and a force(30kn) is applied in the top. I think the internal forces in both the bars will be 30kn. Am i correct. bar1 is made of steel and bar 2 of aluminium. the total length of the structure is 10metres.

MIT Center for Advanced Nuclear Energy Systems (CANES) Courses for Professionals Nuclear Plant Safety: 20-24 June 2005 http://web.mit.edu/canes/education/plantsafety.html and Materials Reliability in Nuclear Power Systems: 27 June - 1 July 2005...

This year my high school entered a battlebot into Battlebots IQ and we got 6 out of over 60 battlebots but I’m not here to brag. We had a full body spinner made out of Grade 5 (Military Grade) Titanium and 4 interchangeable Hardened S7 Tool steel Teeth each attached to the shell with 6 l9 bolts...

Hi! Does anyone know a good reference literature or internet resource regarding what materials are compatible with which acids, solvents etcetera? I'm no good at this at all. I had e.g. no idea that ammonia attacks aluminium. Are silicon and amorphous carbon attacked by anything or are they...

A wall is composed of two materials. Material 1 has a thickness of 7.21 cm and a thermal conductivity of 0.1 while material 2 has a thickness of 6.57 cm and a conductivity of 1. If the temperature difference inside to outside is 25 Co and the wall has an area of 10 m2, what is the energy loss...

Hello, currently I work at a dental lab, we just got in a new 3D scanner that scans in models of peoples teeth so that we can build crowns for the prepped teeth. I was told that it is a IR scanner. We have to put some type of spray or powder on the models so that the camera can see them good...

http://www.nystce.nesinc.com/PDFs/NY_20042005RegBulletin.pdf :smile:

University of Washington - Mechanical Engineering Department Course Notes Chapter 1 Introduction Chapter 2 Stress, Strain and Constitutive Relations Chapter 3 Beams: Strain, Stress, Deflections Discontinuity functions Comparison of...

What is the best way to etch copper with house hold materials? It is for making print plates.

does anyone know of recycleable materials (strongest and less dense than water) that can be used to build a human powered boat?

undefinedundefinedundefined wat kinda material is best 4 da forks of a mountain bike? or were can i find info? quick replies please

Hello folks, I have been told that for a linearly polarised wave, the direction of rotation due to the Faraday effect (caused by a constant magnetic field) is independent of the direction of wave propagation, dependent only upon the direction of the magnetic field. Fair enough. Does this...

I'm aware that an Einstein-Bose Condensate can be made to slow EM energies to slow speeds but I really don't have the $$$ nor time to make a BEC. I also wouldn't be able to get the BEC shape in any form I need either. Therefore, what materials exist that can help me slow down some photons? I...

okay, I've been banging my head against a wall for a few hours. It's a bit difficult to describe but here goes... There is a rope being pulled up with force P. The bottom of this rope is tied to a bent bar. The bent bar is shaped like an upside down U with the two ends stuck in a piece of...

Hi, I was wondering why some plastics seem to shrink when heat is applied? Does the plastic expand when it is colder? Is it some how due to the molecular bonds in the material rather then the ionic bonds in something like a metal that expands when heated? Thanks Derek Mohammed

What are, and the diffrences between p and n type materials?

This is what I often heard about, true or not? Americans also dubbed the biggest environment destroyer and polluter

I just wondered, that our view of how the universe is is ussually WRONG. We've made zero-viscosity fluids, materials with no electrical resistance, and just all together "non-sense" things. Is anyone willing to suggest then that there are materials that do not provide friction(when...

:smile: Can anyone give me the website?

I wanted to do an experiment that had to deal with thermoeletric materials, and the out but of electricity. Does anyone know of a common thermoelectric material? Maybe somthing around the house? If not then just name off what you know. I want to see the output of electricity compared to the...

I'm wondering why the amorphous phase materials have wider bandgap compared to its crystalline phase. To my best knowledge, the bonding mechanism does not changed as the material transform from crystalline phase to amorphous phase. So what causes it has larger bandgap? ST

how do you build & design a bridge with these materials? 4 drinking straws 10 pieces dressmaker's oin 5 pieces of 5-peso coins (the bridge should be able to withstand the weight of these coins) 1 short bond paper and a 1 meter sticky tape Anyone who has performed this project...

how do you build & design a bridge with these materials? 4 drinking straws 10 pieces dressmaker's oin 5 pieces of 5-peso coins (the bridge should be able to withstand the weight of these coins) 1 short bond paper and a 1 meter sticky tape Anyone who has performed this project...

umm i got some silly question to ask , i just couldn't find a good answer by my self. 1. is my body made up with atoms, ? i don't really think so, so what's my body made of? i mean my flesh. 2. wats is a piece of material such as wood or gold, made of, ? i mean when u cut down to...

For years I heard all sorts of promises about materials made in space. An alloy of lead and aluminum was often mentioned as a favorite. What is the state of this technology? Are things looking as good as promised?

i'd like to know about the materials that were used to build the hull of the titanic?...i'v googled it,,, but i suck at finding info so bad, can anyone help?

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So thinks the researcher in the second link. http://www.aip.org/enews/physnews/2003/split/660-3.html http://www.zoology.ubc.ca/labs/biomaterials/slime.html

Can someone give me some information about laminated materials? Is a bar of steel made of many layers, for example, stronger than one solid piece?

I don't know if this is the correct section or not, but I'll let hosts and mentors decide that. My question comes as a result of hearing a number of things floating around as to the possibility of mining asteroids for materiasl valuable to space colonies. Do many asteroids contain...

Experiments to describe the band structure of bulk (solid) materials? I just want to know the name of some of the most used techniques to describe or obtain information of how the band structure of the material is. Not by theorethical calculations, just experiments. For example, let say I...

Seeing as no-one has posted any good geology books, I'll recommend some of my favourites... The Fossil Trail, Ian Tattersall - an excellent summation of Human evolution, a little bit out of date now. Trilobite, Richard Fortey - how he makes a whole book about small arthropods interesting...

Hello, 150kcal of heat raises the temp of 2.0kg of material by 400 degrees F. Whats the materials specific heat capacity? I cam up with 1.35 kcal/kg degrees C. is this correct? Thanks! Dx :wink: