Material Definition and 1000 Threads

My final year experiment involves vibrating a granular conveyor with the same amplitude at at different frequencies. (See picture for experiment set-up). Between 5-115 Hz, the glass beads bounce erratically. As soon as the frequency hits 120Hz or higher, the beads remain on the surface, and can...

Here is the question that is is given to me Part a: Part b: I have given this a go and was wondering if my answer seems reasonable. I had worked out that the mass per unit length (mu) is also the density * cross sectional area of wire Thanks!

so I have quickly gone over this, but feel that I am not going in the right direction. I am assuming Y = 1 so, 62 = 164 sqrt Ka given UTS = 164 Mpa Kic = 62 Mpa m1/2 therefor, working for ac, (the damage tolerance of the material) Oa = UTS = 164 Mpa Kic = Y Oa sqrt ac 62 = 1 * 164 *...

the paper is on material science and i can't find it any where not on google not any where , could you guide me to a website that i can use to search for it? Гуляшинов А.Н., Хантургаева Г.И., Калинин Ю.О. Сульфидизация церуссита полисульфидами натрия при измельчении окисленной свинцово-цинковой...

Suppose we have a copper wire, of resistance R, and we introduce it in water, when applying now a certain potential difference between the two ends, will the intensity that circulates through the wire be the same, and therefore also the resistance ?, is there going to be a potential drop due to...

What would be the strongest possible material that has a density under 10,000 g/cm^3?

I can create a fairly strong magnetic field by leading current through a copper coil. However, I cannot then with that magnetic field create a current (not a useful one at least) in an object made out of copper. I understand that this is because copper lacks of magnetic properties. For instance...

Oldest material found on earth? This popped up in live science https://www.livescience.com/oldest-material-on-earth.html This on PNAS https://www.pnas.org/content/early/2020/01/07/1904573117 Any discussions here? Nothing on Murchison.

I have some plastic parts, and I'm wondering if there is some sort of a liquid paper like solution that I can paint onto a surface that would later harden and have similar properties to that of paper. This would allow me to color my parts since the surface is irregular and would save me hours of...

All those certifuges must eat up a lot of power! How much energy does it take to create fissile material? What is the ratio of energy that it takes to make reactor grade material (3% enriched) to the amount it generates? What is the ratio for weapons grade material (90%)? Does it take more...

If I put a slab of some material whose refractive index is \mu and width is D, in front of slits in Young's Double Slit model, then In the figure you can see that I have placed the slab just after the slits. So, when rays going to come out of the slab they will bend away from...

When supplying electricity to the material. the shape of the material may or may not be square. This material may be This material may be moisture materials or solid materials that may conduct electricity. I would like to know the travel characteristics of electric currents and the potential...

is there a material out there that changes it's properties(for example it's color) when a radiation wave come into contact with it? I need to detect what types of a energies/waves/signals impact a certain object in space (or at least show that radiation hit it some times with great power)...

Which material or combination of materials is the most highly conductive(super-conductor) and highly reflective and heat resistant at the same time? I am asking this because I am trying to block radiation. T

in the inside of the material is heat also can transferred by radiation?

There are two questions that arose in my mind, first of all tokamaks use toroidal field coils which create a toroidal field within the torus to shape the plasma and confine it, but here is a question, the toroid coils have a static B field produced from a DC current in them, what kind of metal...

I have read some materials about quantum hall effect and know that at the edge of a 2D material , one can linearize the potential V and the linear dispersion relation represents right/left moving fermion. So , Can I say that for a given hamiltonian , if I can linearizae it at edge, then this...

Does anyone have an equation for the resultant density of the composite materials? Having a look around the internet and I can't find anything, there was this one website that gave me a step-by-step but the answers did not match (sciencing.com)

That's what I've got , but I want to confirm my answer. Any help would be greatly appreciated !

A massive rocky material that is connected open-cell, macro-porous at surface, but 'vesicles' shrink to closed-cell then solid as you drill deeper: What's the technical term for such ?? == Writing a SciFi tale, I'm trying to describe a large, alien-ish rock formation. I've a vague recollection...

Hey guys, so I have to give a 10 minute presentation for my class. I am absolutely terrible at memorizing stuff. Its pretty bad. If I can find an interesting or cool topic I would be able to remember material better. It needs to be about deformation or fracture of a material in terms of micro...

Composite materials consist of various components such as moist wood ,how will the internal resistance of this material behave? If I want to study the resistance of composite materials, which topic should I study?

following on from the antimatter bomb thread on this forum, I was contemplating other means to cause damage using antimatter, and I was wondering if there was a way to create an explosive charge which contains antimatter suspended in a non-reactive material, and then have it explode outwards...

In Material Analysis Methods (Material Characterization), how possible to know if the methods are use or popular? I guess that the list published in the following links https://en.wikipedia.org/wiki/List_of_materials_analysis_methods contains the full spectrum of material characterization...

I find it really interesting that I can look at an image of rubber and know immediately its rubber, and then look at an image of a metal and know its a metal. How do we reach such conclusions? My first guess is the smoothness of the material's surface, but maybe there's other features I'm...

1. new capacity: ##C = K\cdot C_{0}##. 2. initial potential energy: ##U_{i} = \frac 1 2 \cdot C_{0}V_{0}^2##. 3. final potential energy: ##U_{f} = \frac 1 2 \cdot KC_{0}V_{0}^2##. 4. total work done: ##W_{tot} =\Delta U = U_{f} - U_{i} = \frac 1 2 \cdot (K-1)C_{0}V_{0}^2 > 0##. 5. also total...

https://en.wikipedia.org/wiki/Size_effect_on_structural_strength#cite_note-1 I don't understand about non-random strength (f_t) and size effect of material And please explain to me for the size effect? :cry::cry::cry::cry::cry:

I want to know what is the material that has a moisture and electrical properties response ? Do I have an idea to create an electrical device that is related to moisture using some materials that are responsive to moisture and electrical properties

I'm programming a game in which I'd like to simulate the real world physics of an attack using primarily medieval style weapons. Think dwarf fortress, but rather than assigning damage numbers we're calculating force or kinetic energy. Getting that much is easy enough since I can find the mass of...

I have synthesize a material used in optical trasmission. I want to know its transmission constant beta and its higher derivative. so the first step is to use sellmeier equation to describe its refractive indices. and i have already test a series of refractive indices value in different...

I need to make a custom potentiometer that will be like a ring that goes onto a shaft. The shaft is about 1 inch in diameter. I couldn't find anything like that online so I have no choice but to make one. My idea is to print a plastic ring that I can glue a circular resistive material into...

I wonder it for a long time and still couldn't find a reliable source. I've seen some posts on the internet saying that welds are mostly stronger than the base material but at first glance it contradicts with my intuition. I'm working on a bicycle frame for myself and the welds are important for...

is porous material is a thermoelastic material?

For the past few weeks, I have been trying to review the math courses I've taken over past two years. All I can really do, though, is just read over the chapters. I acknowledge that the only way to actually (re)learn the material is to do the problems. I always tell myself that I can do it in my...

The illustrations on this website are perfect. http://trigonography.com/toc/ I hope it'll help!

I need a wax like material I can buy that I can paint onto a surface and then have it harden on it's own. I want to create fine details on a plastic model, so I would coat the model in wax with a brush, have the wax dry, and then sculpt out the details later. My ideas so far are wax for waxing...

I want to know more about upcoming revolutions

I know that we need to use some boundry condition both on the a radius surface and the b radius surface and somehowuse the superposition on them both, the boundry condition most be for the tangential and the radial part, the only things I got is that i don`t know how to produce a magnetisation M...

Hello, I am an artist working on weighted cloth in my practice since 2015. Each piece I make by hand and is extremely time consuming. I would love if someone would take a look at this and give me any thoughts you might have. I am working on a project that requires filling thin, fabric...

Hello, I am a civil engineer and have been working on concrete creep phenomenon for several years now. After reviewing a large amount of literature on related topics throughout this time, some interesting observations have emerged, and they have formed the idea that the material creep mechanism...

I read the limits of typical ferrite cores and it seems that most sources claim that they tend to work somewhere up to 1 Mhz. Surely they work great under that frequency, but is there any material that could provide a core material for a wide frequency range starting from few tens of Khz up to...

New Wonder material: Borophene https://www.technologyreview.com/s/613267/borophene-the-new-2d-material-taking-chemistry-by-storm/ Sorry @Borek

I'm trying to make a magnetic globe (magnetic from outside) with diameter of about 30 cm. Please imagine it as a snow globe, while it is magnetic as well :). I'm wondering about the options to make it, as light as possible. Please feel free to suggest tags here, if I'm missing anything or I...

I have a question which is ungoogleable. Question: What is the most efficient way to fully dissolve plant matter without destroying its chemical make up, for distillation purposes? Background Information: I started down this rabbit hole while researching the viability of a artisanal soap...

Hello All, I'm curious if there is some chemical or clear / semi-clear material that will absorb or deflect infra red light in the 890 - 910 nm range. IR absorption would be ideal, but deflection should work as well. The idea is to prevent reflection of IR back to it's source. I hope this...

Hello! I am a materials engineering BSc student currently writing my bachelor thesis. The topic of my thesis is regarding the PV/T system and the best material choice for the interface between the glass/glass PV module and the heat mat. I would appreciate any ideas for material with best thermal...

Homework Statement I have a material placed between parallel plates depleted of free electrons and contain negative ions. What would happen to the charge stored across the plates? Would it still be similar to placing a capacitor with a di-electric constant between them? Homework Equations Q=CV...

Homework Statement In a physics lab, light with a wavelength λ0 travels in vacuum from a laser to a photocell in a time t1. When a slab of glass with a thickness d is placed in the light beam, with the beam incident along the normal to the parallel faces of the slab, it takes the light a time...

Homework Statement [/B] Let us assume that neutral atoms or molecules can be modeled as harmonic oscillators in some cases. Then, the equation of the displacement between nucleus and electron cloud can be written as $$\mu\left(\frac{d^x}{dt^2}+\gamma\frac{dx}{dt}+\omega_0^2x\right)=qE.$$ where...

In electrostatics, for what I understand the when I have an electric field, the density of the energy stored in it is given by the following formula: $$W = \frac{1 }{2} E \cdot D$$But when there is some material permantent polarization the above formula fails to work. Is this correct? How can...