Materials Definition and 919 Threads

This is a question that has been bugging me for quite and long time and I have been searching on the Internet, but having no luck. So, why does lower frequency sound pass through materials much easier then higher? Thanks, Rich

http://www.simetric.co.uk/ " Info on SI Units " SI Unit Descriptions " SI Derived Units " SI Prefixes (mega, giga) " Imperial/UK Units " Scientific Notation --(i.e. what is 1.00E+09) " Metric Forum " Feet to metres calculator " Metres to feet calculator " British Thermal Units...

Any good sites/other resources that I could look at?

I have been given kind of a bonus question that requires a little thinking and I wanted to ask if I am going in the right direction with my thinking as I am new to Materials Science. Given: Ballistics test in which a high velocity projectile is fired at a block of material. Isotropic. Does...

Scope The MMSNF Workshops aim at stimulating research and discussions on modelling and simulations of nuclear fuels and coupling the results with fuel performance codes. The aspect of fission-product modelling (not only important for fuel performance but also with respect to safety) is...

Hey, I'm currently studying for an AS exam in Physics under the OCR examination board, i got an exam in like 10 weeks and I am doing ok with physics, the only place i need to develop my understanding is using SUVAT equations, i understand them, memorized them but i haven't practised them...

Zirconia has a very high melting point, about 2700C. This is the primary reason why it is used as a refractory. However, after some preliminary searches, I found another common ceramic material with a melting point higher than that of zirconia - magnesia (MgO), with a melting temperature of...

This is rather useful. While it covers primarily materials issues in the Tokamak environment, the issues concerning the performance of materials in an irradiation environment are generic. ITER - Materials R&D - http://www.iter.org/MaterialsRD.htm In Light and Heavy Water Reactor...

Are there materials that can absorb/trap heat and accumulate it efficiently?

"History of Strenght of Materials" by Timoshenko I just bought "History of Strenght of Materials" by Timoshenko = = GOD. Anyone else read it? As an ME, I want to read all the books on the history of ME, so that I know as much about my profession as possible. I really am starting to like...

It's come upon my interest that besides capacitors, flywheels can also be used to store considerable amounts of energy at impressive levels. The best material is supposedly carbon fiber, since it can spin at high speeds. But what about other materials like steel fibers or fiberglass? Those...

Can anyone list some substances other than penicillian and insulin that are produced by organizms. It seems like most complex molocuels are produced by everything but chemical engineers. Am I correct in thinking that this is because it is very difficult to produce specific complex molocuels on a...

Are there any known materials that will retract significantly when an electric current is run through it? I mean will it conduct electrons, but also take them in and form bonds causing the sample to retract. Thanks, -Scott

for ceramics materials, is there something called a seger equation or something? if so, how do you calculate that?

I have to design a beam for my Materials Class design project to be tested on a univ. bending machine. We have to be within 2.5" by 5" in max size, and 24" long. I wrote a MATLAB prog to calculate every possible configuration to optimize what sizes to pick for a block, a T beam and an I beam...

Please Kindly porvide information about the failure of nuclear reactors materials

http://physics.uwstout.edu/StatStr/Strength/indexfbt.htm#STATICS%20&%20STRENGTH%20OF%20MATERIAL The above link has become inactive (the author, Robert Foley has apparently retired), but another professor has put the course notes into a pdf...

In mechanics of materials we often look at elemental cubes or planar squares, and we write the normal stress and shear stress acting on the faces. Why are the internal moments acting on each face omited? When we cut a frame-machine, we include a shear, normal and moment, why not for the...

Im taking mechanics of materials. One of the things they talk about is cutting out a small elemental cube of a rigid body, that has sides dx,dz,dz. Is it always true that dy,dx, and dz have the same infinitesimal size? I thought that they would not necessarily be the same size, which could give...

I wanted to find the dielectric constant of different materials placed in a parallel plate capacitor using the equation: K = \frac{E_{dielectric}}{E_{original}} Where E = \frac{V}{d} I would use sensors connected to a computer to measure the voltage and i could easily measure the...

Can anyone point me toward a good resource that relates the effects of radiation on materials? I had asked my material science professor about it, but it seems we do not cover it in this introductory class. This class is the only material science class I have to take, and I want to learn more.

I'm studying at Physics ,but I am interested in materials engineering,and I want to learn more about M.M.E.in the world. :confused: thanks, maria

Hey guys, I looked in the science projects sticky and got a good idea for my physics project due on Friday. He only gave us a week to do it, so it doesn't really have to be all that complex, you basically get an A just for doing one, and the better you present it, the higher the A will be...

[SOLVED] Materials for Nuclear Reactor Please briefly explain the Materials which are used in nuclear reactor. such canning material, moderator etc. :confused:

Hey, I just bought my book for mechanics of materials from the book store. Apparently its used in teaching statics and mechanics of materials all in one. I already took statics with Hibbeler, and I really did enjoy that book. It was VERY thorough. I looked through this books statics and felt...

Hey, I just bought my book for mechanics of materials from the book store. Apparently its used in teaching statics and mechanics of materials all in one. I already took statics with Hibbeler, and I really did enjoy that book. It was VERY thorough. I looked through this books statics and felt...

I've recently drawn up several machines that handle food. However I wanted to know if there are any materials that I should stay away from, for handling food. To clarify, I would like to go to a harware store to pick up supplies, but is it ok to run liquids or store food in pvc for example...

Mechanics of Materials Bending Stress Problem Hi, I have a homework problem for mechanics of materials involving bending stress. Here is the exact wording: "Show that the maxiumum bending stress for a beam of rectangular cross-section is Omax = Mc/I [(2n + 1) / (3n)] if instead of...

Are there any good books out there which contain information about ceramics like silicon carbide, silicon nitride, etc., how they are manufactured, history, etc?

does anyone know of a good online materials database for their properties more specifically i am looking for fiberglass and/or carbon fiber properties thanks

While mowing the grass, I thought of the following problem (to take my mind off of the heat!) Consider a vertical column of water in a container. The pressure exerted by the water on the sides of the container is rho x g x h, where rho is the density of the water, h is the height of the column...

Hi, does anybody know why the melting points of materials drop down when its size gets smaller down to nano-scale? For a nano particle set in another high-melting-point material, how does its Tm go?

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...

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?

[FONT=Tahoma]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...