Material Definition and 1000 Threads

I can't understand how both the material and the scale's expansion are being taken into account at the respective temperatures. Please explain the concept in detail.

I have a 2D material which has the shape of a quarter annulus. That is, in polar coordinates ##(r, \theta)##, ##\theta## ranges from ##0## to ##\pi/2## and ##r## ranges from ##r_i## to ##r_o##. When I apply a thermal perturbation to the material, i.e. when I keep the inner and outer curved...

After seeing this video, I have decided to make a homemade version of this machine. The axle and other parts can be taken care easily, but I want to know what kind of material is being used to make the blades of this turbine. These part is the most important part while making the turbine.

Which one is stronger in vertical compression? A cylindrical hollow rod or a hollow rod, that is made from the same material as the cylindrical hollow rod, with twisted construction around the middle part? If a hollow rod has less cross sectional area than an another hollow rod but the one with...

So I am trying to find the amount of energy needed to break apart stone into different sized chunks (when either punching it or blowing it up) and I'm using this method to estimate it: Assume the object got broken up into cubes of the desired diameter Find the surface area of all the cubes...

I just need a permeable PDMS material. Sylgard comes in MOQ 0.5kg, while Sylcap is MOQ 100g which is better, I just need to know if it will work the same.

What is 42crmo4v - Substitute of material in other standards.

Hey, Can Anyone suggest me a common(Household) material that obeys Hooke's Law and is Similar to Rubber/silicon........Basically a material which helps in shock absorption. Please note: No fluids and No gases are allowed Thanks in Advance ;)

I'm currently reading Jason Thalken's Fight like a Physicist, and I think so far they gave one of the most intuitive explanations of the practical difference between Momentum and Kinetic Energy, but I'd like to just conceptually reinforce it and make sure I have it right. So from what I...

Is there any specific physical reason that can explain why graphene produced by tape exfoliation tends to break into fragments instead of remaining as a original size perfect piece? Some of the literature I found only briefly mentions that it's due to certain forces causing graphene to fracture...

I have been looking at pocket knives, seems like all the ones with G10 handle scales have a warning about cancer. This is a very typical pocket knife. https://www.chicagoknifeworks.com/steel-will-cutjack-c22m-linerlock-od/ You see the cancer warning message? The rest of the knife is all...

This CuNiFer alloy pipe is used in a seawater cooling system and is electrical insulted with nearby metals; this prevents galvanic corrosion to occur since there is no contact with other metals. I've seen multiple sources that say CuNiFer is very corrosion resistance. The pipe is still...

For a seawater cooling system there is a isolated copper alloy pipe where seawater flows through protected with sacrificial Anode. For galvanic corrosion there needs to be two different metals connected in a presence of an electrolyte, since this isn't the case. For what kind of corrosion is...

I think the title speaks for itself, I am from a country that half of the planet doesn't know exists. Iäm a typical finn that is socially so akward that wont go to the common tutor meeting to get help, but rather goes online and spends way too long on simple problems.,

My answer is (B) since it has the highest slope for the straight line part of the graph but the answer key is (A). Is it because the slope of graph B will decrease until the value less than slope A? So we don't only consider the straight line part but the whole graph? Thanks

Hello All : as i try to create better economical situation for my self , as some of you noticed that i tried to enhance few things in engines , although it did not quaitly work out it lead to another invention , i couldnt change it yet to economical benefit , due to tests required , and dont...

Hi, I need a tube that will be shatter proof, non conductive for electricity and be a good heat insulator, it need to be rigid and sustained high temperature (~250 c°)

I've been importing this material from China for years. However, shipping is getting more and more expensive, slow and unreliable. It would be a great to have a local manufacturer/supplier but I don't even know what it is. It is advertised as "imitation gold leaf" but... Imitation gold leaf from...

Dear Experts, are there any books available that discuss the thickness and material of space suits?

Referring to the attached, the bottom right is an electronics compartment. The external panels are 20GA steel powder coated yellow. There is 1-inch of R-6 foam board insulation on the inside of all external walls. The skid is exposed to ambient heat and direct sunlight when on site. If we...

The JHR Material Test Reactor is currently under construction at the CEA Cadarache centre. https://jhrreactor.com/en/about/ The CEA began exploring the possibility of designing and building a new reactor to replace its material test reactor called Osiris* in the 1980s and 1990s. The JHR...

Hi everyone. there are materials called soft magnetic and they are halfway between a permanent magnet and a ferromagnetic material. I would like to try to make a field coil loudspeaker where the maximum amount of flux-density is very important but also the amount of current it takes to create...

Ref: Van der Waals Equation @ Wikipedia The above paragraph is explains how intermolecular attraction reduces the gas pressure, assuming that there is no attraction between walls and particles. In practice, would there be a change in pressure from one kind of wall to another, if we ensure...

Hi everybody, I don't have M700 grade silicon/electrical steel data to add to Maxwell Electronics 2D Material Library. How/Where can I find this data? Could you help me? Thanks, Oguzhan Gonc

This's slight confusion as productions/markets have aluminium material for making up a vise clamp Is it really going to workable/viable and which type aluminium could reliably be as vise clamp ?

Hello all! I have a earring project with magnets involved but no magnet expert involved :( Here are a few stupid questions I hope someone can help us with! BACKGROUND: We are designing magnetic earrings. The earrings are meant to clamp the ear with 3 different levels of pressure. The magnetic...

Thanks to the JWST, we have this stunning picture. The APOD description says What are the processes that eject material at this stage?

Watching this exhibit from years ago () led me to think that ball bearings will bounce really well from steel glockenspiel bars, but that wasn't the case when I tested this myself with a stainless steel ball bearing and a steel glockenspiel bar. Granted, I was just propping up the bare...

According to what I know, the net magnetic field ##\vec B## inside a solenoid is given by $$\vec B = \mu_0 \vec H + \mu_0 \vec I$$ where ##\vec B## is the net magnetic field inside a current carrying solenoid, ##\vec H## is the magnetic intensity ( aka magnetic intensity or magnetizing field...

Summary: I am looking for suggestions on an informative read surrounding nuclear energy I am a junior year physics student at UCSB looking to go to grad school for nuclear physics and eventually work with nuclear energy. My curriculum at UCSB does not offer any explicit classes surrounding...

Hi, It is easy to find discussions about time dilation and muon Half-Life. Is it meaningful to discuss whether bosons capable of pair production can have their decay rate changed if they pass through material?

My answer is A but the answer key is B. I don't understand why B. I would think B is the breaking point. Thanks

Hello there! I am working on a project where we need to bind together 2mm Tungsten shot into a solid shape. The shapes are around 10mm x 10mm x 12mm. I need to be able to reclaim the Tungsten beads after use. Thus far I have found that water soluable wax has been a good substance, however it...

I have been given the task of modeling the heat transfer from a light source of known power into a system consisting of two connected materials. I must find the temperature change in the bottom surface. The two materials are initially in thermal equilibrium with the surroundings. My first...

Is it currently possible to create a Graphene or Graphene Oxide-based polyester film, but with significantly lower helium permeability than currenlty avalible materials? What would be the best way to create such a material and what type of processes and equipment would be involved in the...

I tried to solve it for some time and then looked at the solution manual, which got me completely lost. Those are the first lines of the solution : I'm not so sure how equation 4.39: makes him conclude that the same relation holds for dipole moments. My second concern is that I'm not sure how...

With reference to picture, l have an oblique slab of material dieletric in a capacitor. The plates of capacitor are infinite and far. How can calculate E and D in dieletric?

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I want to improve the magnetic field strength at the surface of a magnet configuration by utilizing diamagnetic materials to guide the magnetic field lines. I have not the proper equipment to measure the effect myself but would this work? This is the initial configuration with four magnets side...

Hi guys.Lately I have been posting questions related to paper material and I am getting no replies (here, here and here). I am convinced it's not only due to the difficulty of the topic but the way I am posting it. Should I "go to the point"? Honestly, it's also acceptable that people only...

Let's say I have a constant magnetic field and I dive into it a diamagnetic material. Griffiths says that in the presence of a magnetic field, matter becomes magnetized and it will be found to contain many tiny dipoles with a net alignment along some direction. However, what's exactly the link...

Dear everyone. I wish you all happy and healthy after this Covid pandemic.Last week i used ethanol mixed with raw materials, got the solution ( suppose ethanol + oil + wax +etc ). And I add water to that Ethanol Solution above with ratio 1/1...inside the mixing solution it formed a resin ( slime...

I know that inside region 1, the D-field is zero as it is a conducting sphere, the E-field must be zero. It makes sense that in region 2 (inside the dielectric) there is a D-field. My question is, is there a D-field outside the dielectric material (r>R)? Obviously there will be an E-field, but...

From the second equation I get that, ##\vec D =\frac{q}{4\pi \vec r^2}\hat r## From first equation I get that ##\vec E = \frac{q}{4\pi \vec r^2 \epsilon}=\frac{q}{4\pi \vec r^2 K \epsilon_0}## But I saw that the answer is ##\vec E=\frac{\vec E_0}{K}## While writing the comment my mind said...

Summary:: Difference between the material and matter They look similar but I know they differ. What might be the possible difference between them? Let's discuss.

I have thought about the following ##\oint \vec{H}\cdot d\vec{l}=0\Leftrightarrow H_{int}(D-h)+H_{ext}h=0\Leftrightarrow (\frac{B}{\mu_0}-M)(D-h)+\frac{B}{\mu_0}h=0\Leftrightarrow M=\frac{D}{D-h}\frac{B}{\mu_0}## but (supposing what I have done is correct) I don't understand which value of ##B##...

I would like to plan on a postgraduate studies in Material Characterization - Semiconductor; how difficult is this subject since there are a varity of technques to master them properly in order to join the Semiconductor Industry?

Do I need to have a solid background in Material Science if I would like to study thin-films?

A good candidate for the sample retrieval mission. https://www.nasa.gov/feature/jpl/nasa-s-perseverance-mars-rover-makes-surprising-discoveries

Is there a material that allows visible light and uv light to pass through? Edit: A physical material