Material Definition and 1000 Threads

Hello sir, I am new to this forum i am looking for thermophysical properties of heavy water for my computer simulation. following properties i found in the wed. can anyone suggest me that these considered properties are correct (ref temp 40 C and 6.549 kPa) density = 1099.99 Kg/m3 specific...

so I'm told that temperature difference is ultimately what results in heat transfer. But when considering what happens inside a uniform material, if temperature difference was solely responsible for heat transfer, then different heat transfer rates wouldn't exist among different materials at the...

Now we knwo that materials tend to rapidly expand (explode) under given circumstances , like a wire subjected to sudden , rapid overcurrent or like a ball of hot flammable gas when heated or otherwise. Now I wonder what would happen if we had the ball of some heated rapidly expanding gas or...

I'd post in the learning materials section but I am unable to do so there for some reason. Which of these is the best to learn from...

These guys made a stupid and 'fatal' mistake. http://www.washingtonpost.com/world/stolen-cobalt-60-found-in-mexico-curious-thieves-likely-doomed/2013/12/05/262ef990-5d66-11e3-8d24-31c016b976b2_story.html

Backing material -- useful tools at eeweb.com Hellow! I'w like to divulgate this material that I searched... It's nice calculator (is possible to make download) http://www.eeweb.com/toolbox/calculator And some formulas http://www.eeweb.com/toolbox/math-help Do you have something...

All of the related work is in the attachment. If you could please help it would be really appreciated. I've asked a bunch of people in my class, and they're confused also. Thanks in advance!

For microwave. Is it any insulator? Rubber will work?

Hi! I know that material science lies at the interface of physics and chemistry and that any material scientist must have knowledge of chemistry, quantim mechanics, solid state physics,... The problem I face is that I am quite keen on entering material science with a mechanical engineering...

I am just finishing up my first physics course this semester (as a physics major). Although there did seem to be a lot to soak up this semester, I didn't feel like it was too bad. I am just curious though, is there a resource that has a list or other type of reference material that shows you...

I'm not talking about relativistic effects, just solid state physics. I'm wondering what determines the size of objects at the particle, atomic and molecular level, and especially how the constant c enters the equations? I suppose it depends from the strength of the molecular bonds which...

Hi, I am trying to find out what material heat resistant washers are on a BBQ. that material looks like fiberglass and seams to be-able to take high heat loads. Cheers

There is a book that I would like to read "Electronics for scientists" but it has physics as a prerequisite and I will not be able to take a physics course till next year (I would just take the one at my high school but the teacher is not very good and I would rather start with a calculus based...

hi guys, which one of those material you think it should give highest material removal rate by using die sinking EDM. the tool is copper and workpiece are 1. copper 2. stainless steel 3. aluminum lets assume the same input parameters will be used for those three material thank you

Hello, I am looking on building my own water bike after finding out that they start around $1700 like the one pictured in this thread. What designs / materials can make this better? I would like to also have transparent floats rather then the original colors that you constantly see...

So at the college I'm in I'm a freshman Chemistry + (any) Engineering major (don't have to decide on what kind yet). I was set on going Chemistry + Biochemical engineering but when I went to my adviser he told me maybe think of becoming a Material Science Engineer. He said something along the...

Everyone knows that if a light come in a material will change speed(will become less),and from wikipedia I read that light wants to go from his faster way. So when material 'eat' from light some speed,then light as more 'clever',goes from a sooner way.(that what we call "refraction."). So my...

Hello, I am a cycle enthusiast looking to create a shield for my bike in the form of a rain drop which is known to be the most aerodynamic shape. I am looking for a material that is TRANSPARENT (clear, one way mirror finish, or black), STRONG, DURABLE, FOLDABLE, EASY TO MOLD & SHAPE...

Homework Statement The Monovacancy formation energy of a metal is 80 kJ/mol. Hence the monovacancy concentration (CV) at 25 degrees celsius is about: A)1.3x10^-13 B)9.5x10^-15 C).9 D)5x10^15 The Attempt at a Solution I know the answer is B but I don't know how to get to that. I...

I do not fully understand the process of understanding of a material one reads. Suppose someone reads a chapter from a physics book. How does one make sure that one has really understood what she/he had read? I must confess that at times I read from text and I even feel that I had understood the...

these are a couple more math problems I am having trouble with. if you can help me i would appreciate it. if you could just put the number of the problem your helping me with that would be great 1)simplify -3sin^(5)x - 3sin^(3)x cos^(2)x 2.)simplify 2cot^(2)x -3cotx - 9 / cot^(2)x - 9...

Hello to all i am new to this thread and i have a precalculus exam tomorrow. I was going to post 4 or 5 example problems that i have and wanted to know if someone could explain to me how to get the answer step by step. I need to use these explanations as a help guide and as long as its step...

the amplitude of the function -1/5 sin(2/3x - pi/2) is equal to what? 1/5 i think can anybody help?

Homework Statement Lightweight bicycle had been fabricated from aluminium alloy tubing, with joints made by adhesive bonding. When the frame fractured near one of the joints, the owner requested that a repair be made using conventional gas tungsten arc welding. Shortly thereafter, the frame...

Hello Physics Forum, I just wanted to hear from some experienced Electrical Engineers on how much of the material covered in school are actually used in a real job. I am currently a junior in EE and have heard mixed responses from my professors pertaining to the issue. To make it less broad...

hi everybody. i just wonder. can we add new material library in ansys maxwell 3d(v.16) manually. especially magnets?

Old English fascinates me but finding material on the net is difficult, anyone have an idea where to find Old English script?

I have been looking for hours tring to find a material with these properties. Working Temperature up to 500° F Low coefiecient of Friction Chemical Resistance to Costic Cleaners (mainly chlorinated) Coeffecient of Thermal Expansion around 9.5 μin/in°F decent machine ability made in 1/4"...

Sorry for the wording of the topic- I couldn't figure out how to make it fit. If I passed a hypothetical square wave through a material- be it wood, glass, cotton, etc.- would it change to look more like a sine wave?

hey pf! can someone please tell me if my understanding of the material derivative operating over some scalar \rho is correct? basically, from my understanding if we take \frac{ D \rho}{D t} this will tell us how \rho changes as time changes AND how \rho changes as we move our little piece of...

Hi everyone, I'm an a-level student (year 13) doing Physics, Chemistry and Maths. I am struggling of what university subject to apply for...I want to do a subject that is a combination of all three subjects I'm now doing. I like topics that I can go very very deep. I think quantum and...

For example a phone in a case is dropped, would it suffer more in a plastic case or a rubber case? Thanks

Hello. MechE noob here. I'm an ECE guy and I'm apart of a group of students working on a solar car. I decided I wanted to get more mechanical experience so I joined one of the ME teams. However, before they let you work on real stuff they make you go through smaller projects. So my first...

Homework Statement In the figure below (see image in color), light travels from material 'a', through three layers of other materials with surfaces parallel to one another, and then back into another layer of material 'a'. The refractions (but not the associated reflections) at the surfaces...

I was wondering because I'm interested in getting a Materials science graduate degree, but was wondering if my options would be limited to experimental work. What sort of work would comp. materials science involve? My rough guess would be creating models/simulations of materials as opposed to...

I am trying to make a floating sentry bot ; though, my plan was to use Helium or with a mixture of Ammonia. I want to find the minimum amount of gas in a balloon require to reach the max height the object should float. I know the buoyancy force is Density * Volmin * g : where the maximum...

Homework Statement two point charges in free space are separated by distance d and exert a force 2.6 nN on each other. The force becomes 1.5 nN when the free space is replaced by a homogeneous dielectric material. Calculate the dielectric constant of the material. Homework Equations I...

Homework Statement I have a project for my Materials Science and Engineering class and we have were given 4 unknown materials and we have to determine which kind of materials they are. We have to come up with our own experiments. As of now, I've done the Rockwell hardness test, electrical...

I am trying to understand how to tackle torsion of bars that are non-circular and two-material composites. I understand the process of finding the torsion constant for non-circular sections but I am not sure how the warping function changes across a material interface. For example, if I have...

What is mean by carbon based material "C[SIZE="2"]0.2"

Hello , Pursuant to a relentless mugging into material data sheets,I am still unable to identify the material of a component corresponding to the hardness of which i measured using an ultrasonic equipment. its 240-260 HV(vickers).I need to know the material for procuring the component to the...

Is it normal for university exams to never include some of the material that is in the curriculum? I have some modules that are quite extensive, but about 4 to 5 groups of exercises appear to repeat in the last few years. However, they also ask for students to study about 10 to 15 types of...

How does electron in a piezoelectric material flow to produce electricity? I read about piezoelectricity but I don't know exactly how it works. When stress is apply to piezoelectric material, the structure deform and create non-zero dipole moment and then what happen? How does electron flow...

Keep in mind that I would post this in math and science material but I have insufficient privileges for some odd reason I am going on a 15 hour road trip, and would like some Introductory Physics audio to listen to on my iPod. IF anyone knows of anything I could listen to it would be...

Hey everyone, I'm starting calculus in a few weeks, and I've been wanting to pick up some supplementary material. I'm using the Larson Calculus book, 9th edition- https://www.amazon.com/dp/0547167024/?tag=pfamazon01-20 - which I've read very mixed reviews about. Some people say it's a great...

I was wondering if anyone could suggest a material that would stay in a solid state within molten steel/aluminum at least for several seconds. There are also two things: 1) the material should react to a magnetic field applied from the outside 2) material's density should be less than that of...

Is there any additional material, besides the 4 practice tests (86,92,96,01) and the solutions on grephysics.net? There was a site up a few months ago physicsgrad.org or something but seems to be down now.. and it was an awesome site.

Hi everyone, I plan to major in nuclear engineering and material science and engineering. What field of study can I integrate both disciplines? Which field in nuclear engineering is currently most active? Thank you,

Hello friends, Every object has certain color, because it reflects that potion of light & absorbs all other visible radiation, What is the mechanism that happens on the surface of a body, which makes it reflect certain portion & absorb rest portion.

Hi, What is the material which would develop powerful vibration for a sustained period when they are stroked with another material(may be the same or a different material).