A material is a substance or mixture of substances that constitutes an object. Materials can be pure or impure, living or non-living matter. Materials can be classified based on their physical and chemical properties, or on their geological origin or biological function. Materials science is the study of materials and their applications.
Raw materials can be processed in different ways to influence their properties, by purification, shaping or the introduction of other materials. New materials can be produced from raw materials by synthesis.
In industry, materials are inputs to manufacturing processes to produce products or more complex materials.
Hi help please
You have decided to landscape your back garden, and have chosen to:
place a border around your pond (A)
replace the broken fence surrounding the garden and add a decorative trellis
build a patio in section B
spray your lawn with lawn food (it's looking a little patchy)
You can...
I have tried this a couple of times but no successBefore you buy materials, you need to work out how much you will need. As such, you need to calculate the following:
the circumference of the pond -A
the perimeter of the garden
the patio area -b
the lawn area (minus pond area)
the pond area- a...
Hello everyone !
I'm Hugo. I'm a french high school student. This year I've a project on new way to store electricity and their materials.I've done researches on super capacitors. But I've found only that "new way" to store electric energy. And for the material part, I don't know what I can...
I'm curious how thermochromatic paint is made that has many changing colors corresponding to different temperatures? Read that liquid crystals are used but they same as in LCD displays or it's somekind another chemical?
Today, I turned on an electric kettle for heating up some water, then I going to did something else. Since the cover of the kettle was lost, it didn't automatically stop when boils, and I forgot to turn off the kettle when boiled, then all the water vaporized at last and the kettle stopped...
I want also to build electrolysis based hydrogen generator or and water oxygenator/aerator. It's simple electrolysis device but requires special electrodes that are corrosion resistant or at least safe for human consumption. I seen that hydrogen bottles use platinum titanium electrodes. Platinum...
I've read that nuclear waste is stored in Olympic-sized swimming pools, but what is it about water that so effectively stops radiation? And apparently, this shielding effect of water is so powerful that one could literally stand right next to the pool (and according to some things I've read...
Hi everyone, I am new here, so please be kind if I make mistakes on this forum, I will try to learn fast.
I need help in explaining the solution of one of the examples from Timoshenko's Strength of Materials book. The solution is provided in the book, but I did not get it, no matter at which...
I am 2nd year physics undergrad. Just want to study a bit about materials in my free time. I have no idea about engineering books. Please suggest some good books. Thanks.
Hello there. I'm a veteran science teacher at the middle and high school level. I've taught a few years of physics and am interested in moving towards engineering.
I have looked at a number of available curricula like Project Lead the Way which require a significant investment in time and money...
Hello,
My university is offering a couple of programs in Physics: Applied, Astro, Computational, and Material. So far, I liked Material and Applied in terms of getting early job opportunities.
What advise do you guys have for me, before I make my mind for any of them?
Thank you!
Glass allows visible light to pass through I would like to find a list of materials that allows lights of different EM spectrum to pass through, not just the above, Searched throughout google, couldn't find any!.
Homework Statement
Can anyone advise if this is a satisfactory answer. I've had a run over it and it does seem rather bulky for the given question.
The Attempt at a Solution
Commercial and marketing:
Polymers can be classified in a variety of different ways. The commercial market are...
Hello,
Looking for some guidance for my son. He will be a senior in high school in the fall and will be applying to university programs in Ontario, Canada. He is leaning towards studying chemistry and/or physics. We (his parents) absolutely want him to follow his passions, but of course are...
hello dear physicists
I will work in my thesis on 1D materials using DFT as a numerical method to find the properietes of these 1D materials
I would be very happy if someone can help me with references (books, links, articles, vedios ...) that could help me to advance in my work
Thank you
Hi I'm on to the last question for my HNC and having a nightmare trying to work out my best options! Any help would be greatly appreciated!
The bracket show in figure 1 is to be used to mount an outboard motor onto the transom of a boat.
a. suggest two appropriate materials which will require...
At the interface between:
1) conductor/conductor
2) conductor/semiconductor (or dielectric)
3) semiconductor/semiconductor (or dielectric/dielectric)
What quantity should be continuous?
Is it the electrochemical potential, only the chemical potential or is it the electric potential?
Since they...
For an anisotropic material, is there any way to analytically determine the elements of the stiffness matrix?
For orthotropic and isotropic materials, there are analytical expressions relating the stiffness matrix elements to the elastic modulus and poisson's ratio, but I do not believe this...
As I understand, viscosity characterizes the "resistance" of a material to "flow locally" as a function of the velocity of the material flow.
Now my question is following, what are the physical mechanisms involved which make this "resistance" dependent on velocity of the material movement/flow...
I Had been given an assignment on electronic properties of materials in reduced dimension as mentioned above so I have been given another option to choose whether it to be a theoretical approach or experimental approach which one should I choose.
So I'm working on this project for a inflatable solar sail (so a spherical solar sail) and we are really only verifying the deployment of the sail in space (from a cubesat)...We are doing a mock PDR and I need to find info on the sail we'll be using. My job is to find an "off the shelf"...
Hi fellow forum-ers :),
I have a test in about two weeks where i am going to be given a dtl or ttl circuit which i have to analyse and calculate its function. The professor said that the circuit given to us will always be a useful and existing one meaning he's going to give us some NAND, NOR or...
Hello,
I am doing a high school EEI to investigate the impact that the material of a cup has on the temperature of water inside the cup when left outside in the sun.
The cups I am using are:
Glass
Steel
Plastic
Paper
Theoretically, if I poured the same amount of water into each of the cups...
Homework Statement
Knowing the left lug is carrying 10,000 lbs, determine the loads P1 and P2 in the lugs on the opposite side of the pin.
Homework Equations
Force Balance (ΣF=0)
Another equation needed
The Attempt at a Solution
10000 = P1 + P2
This is where I need another equation to...
Homework Statement
Find reactions at ends and deflection at C
Homework Equations
RA + RE = 115kN
##\delta##Total = ##\sum## (PiLi)/(AiEi)
The Attempt at a Solution
RA + RE = 115kN
Then apply superposition: (Get rid of RE) divide whole member into 4 elements and add.
##\delta##Total =...
Hello every one.
Ferroelectric materials have spantaneous polarization but i read in many articles that these ceramics are polarized by applying an electric field. Why polarize ceramics that are already polarized ?
Thanks.
Homework Statement
In an electric circuit, consisting of copper wires with cross section area of Sc=5mm2 and a temperature of t=25C, a lead fuse is added melting when the copper wire temperature increases by Δt=25C. Find the cross section area of the lead fuse wire Sl=x.
specific heat...
Homework Statement
a) State the boundary conditions for the electric field strength E and electric flux density D at a planar interface separating two media with dielectric constants ε1 and ε2.
b) A parallel plate capacitor with a plate separation d is filled with two layers of different...
A complete table of the ac susceptibility ## \chi_m ## of various ferromagnetic materials, where ## M=\chi_m H ##, is something that I have had trouble finding in a google of ferromagnetic materials. In what I have been able to come up with to date, there is quite a spread in the values of...
Acoustic impedance of material is defined by density multiply by the velocity of waves within the base material.
My question is if i have a tubular or hollow part with a base material, does this count as a reduction of density compared to the base material of the tube or hollow part. Would the...
Why are materials whose yield stresses are highly strain-rate dependent
more susceptible to brittle fracture than those materials whose yield stresses
do not exhibit marked strain-rate dependence
Homework Statement
Question C(ii)
Homework Equations
dQ/dt =-kA(dθ/dx)
dQ/dt = (θ1-θ2)/ ((lx/kxAx)+ (ly/kyAy))
The Attempt at a Solution
So the first time I tried at this question, I was using the second equation provided above,but when I check the answer, they put the area on the numerator...
I am putting together a hands on activity for ninth graders, which will include testing different materials to determine whether they are attracted to a magnet.
I have collected fasteners (screws, nails, bolts), and surprised that the fasteners I purchased labeled "zinc" are attracted to the...
I have selected a topic for my research work which is "nanostructured materials for solar energy conversion" I have read many of articles, most of which are about Li batteries but I want to do something new. Anyone who's in this field suggests something new.:smile:
Dear all,
I have a question related to acoustic propagation in isotropic lossy media, more specifically generation of Lamb waves at fluid-solid interfaces. There goes the question:
I am trying to obtain the Lamb wave velocity and attenuation dispersion curves of viscoelastic materials...
Homework Statement
https://ibb.co/imui5b[/B]
hey i need to calculate max normal stress at BC and max shear stress at b and c
is my torque equation right?
Homework EquationsThe Attempt at a Solution
so i thought
Σma=0 Cx*6+80*6+80*2=0
i ll find cx
and then ΣFx=0
and ΣFy=0
Homework Statement
Homework Equations
G = Shear Stress/Shear Strain G = E/(2(1+n)) n being poissons ratio
The Attempt at a Solution
So I know the easiest way to solve is simply to manipulate the first equation a little bit >>> Shear Stress = G * Shear Strain >>> Shear Stress = P/A >>>> P...
Hi, I'm currently in my last year of undergrad and I'm wondering about which specialization I should pursue. I'm looking for career stability, I don't mind leaving academia I'd just like to employ what I study in school in my future career. So, to my questions
1) In terms of career stability...
For an assignment, we need to make a model house and need to insulate it to conserve heat. The best insulation will be picked as the winner and they are compared with an infrared thermal camera. So I thought if I could absorb the IR, it would look colder on the image therefore seeming like the...
Homework Statement [/B]
The inclined ladder AB supports a house painter (85 kg) at C and the self weight (q = 40 N/m) of the ladder itself. Each ladder rail (tr = 4 mm) is supported by a shoe (ts = 5 mm) which is attached to the ladder rail by a bolt of diameter dp =8 mm.
1) Find support...
Hello,
I am interested in making a homemade radio receiver out of common materials.
Do you have any suggestions or websites I could get some ideas from?
Thanks.
I.
Homework Statement
Homework Equations
Torque = F. d
Distributed Force -> Concentrated Force = w.d
The Attempt at a Solution
Concentrated force is equal to 40kN and I have found the B(y) as -10kN by taking moment with respect to the A point. And from the equilibrium A(y) is 50 kN...
Homework Statement
A 60-cm long gold wire is soldered to a silver wire of the same length as shown in the diagram. If each wire is 2.00 mm in diameter, determine the equivalent resistance of the combination between A and B.
Diagram is attached.
Homework Equations
R = ρL/A
The Attempt at a...
Hi, I wonder
is it possible sound wave heat material that high that the material goes up in flames?
Or what other type of frequency can make some materials burn?
Hello All,
I am currently a junior in physics and have set sights on Materials Science (Electronic Materials/Nanotechnology) for grad school. My school does not offer MS.Eng as a degree and so the only Materials Science course I can enroll in as the general "Introduction to Materials Science...
Cross posted this in the materials forum but i received nothing so I'm posting it here.
<< Mentor Note -- OP has been reminded not to cross-post at the PF >>
So the application is in a pedal set for a racing simulator cockpit. The brake pedal has a high resolution pressure transducer that...
Hello all and thanks in advance for the help!
I am currently working on creating a lighting fixture that will be suspended over an aquarium. What I am having trouble with is determining a safe material and thickness for the spars going between the lights (see below). My goal is to have these...
Homework Statement
This isn't a homework question but something I'm working on that I thought should be simple. Two disks (area ##A## and thickness ##d##) are joined together and placed under a radiation heater in vacuum, so that one side of the top disk is heated with a constant power. Assume...