Resources Definition and 442 Threads

Is there an exact reason for the non-uniformness or is it all just random?I mean in the early stages of Earth's development when It was still hot, shouldn't all types of substances have spread more or less evenly?

Hi there, I'm working on fiber lasers and I'm interested in getting up to speed with the topic of mode-locked fiber lasers. However, I can't seem to find resources suitable for me at this current stage, hope that you guys can help recommend a suitable review paper, book or anything that's...

Hey guys, I am just looking for some online resources for solving the heat equation. So far I have looked at Paul's Online Math Notes: http://tutorial.math.lamar.edu/Classes/DE/SolvingHeatEquation.aspx But I don't feel very confident with the material yet. I would really like some more...

In my work I've encountered equations of the type: (Ax).*(Bx) + Cx = d Where A,B and C are non-unitary square matrices, x and d column vectors and .* denote component-wise multiplication. I have a few books which discuss nonlinear matrix equations, but not of this kind. Any suggestions?

I'd like to try to pick up Python over the summer, while I have the free time. I do have some programming experience, and I've heard it's not too difficult to pick up. I've found some things here and there, but if anybody has any strong recommendations of a particular resource (pdf document...

I'm working on a project in the field of DNA origami and need links to research papers and study content for the trapping processes and folding processes. Can anyone help?

Does anyone have any links that can explain everything that has to do with fluids... Such as: Bernoulli's equation Pressure Flow rate ..etc Any help would be appreciated, i just can't seem to grasp this concept

I'm currently taking first year Electromagnetism and I'm studying for the final, I was wondering if anyone has links to some good resources to help? Currently I'm just rewriting my notes and marking down any concepts I need to look into.

Greetings, I am not very knowledgeable on the modern history and the current political situation in the Middle East. When I try to speak with people about the subject, often all I get is a barrage of strong opinions that leave me no more informed than when I started. As a result, I'm not...

Hey all, I was looking for some older papers by Einstein and De Sitter from around 1916 and my search is coming up blank. Google (Scholar) is not returning anything useful, the journal archives don't go nearly so far back, the particular volumes are not on archive.org, and even my local...

Hi All! I have to make a report on workshop tools(Ex : Angle plate, V-block, Dividers,Tri square, Scriber, Vernier depth gauge, Surface gauge, Calipers, Radius gauge, vernier height gauge, Go-No-go gauge)I've gone through Wikipedia links,and I am in search for more details. Please share...

Hi I'm currently studying for my second year engineering exams, and I'm struggling with distributions. Unfortunately I missed most of the statistics lectures in my math course (something I massively regret now) and the lecture slides aren't annotated enough to give me any clue what is happening...

I was wondering if anyone has compiled a list of AA resources. Recently, I have found that I practically need to learn everything from the class outside of class all over again. I have been playing around with YouTube, but haven't really found anything worthwhile. So, what about you guys...

Hey! I'm doing Science Olympiads and my category is Astronomy. We're allowed to bring in a laptop with whatever we want on it but it just can't connect to the internet. Can you recommend any software, databases, or etc that would be useful to have? Normally, the questions are basic...

Is there a way to allot more resources for Mathematica to use? I have 16GB of RAM and the Intel i5 but Mathematica is still too slow at many things. Is there a way I can allot more of my computers resources to the program?

Does anyone know a good book about Class D amplifiers, or perhaps some other resources? I'm looking for a place where they have a good analytical approach. Equations and stuff, and explanations thereof. Any takers?

Hi guys, in my college we have this "Independent Study" component for the Intro Linear Algebra class. Basically, I have to solve 4 questions that go beyond what was covered in class. Sadly, being the procrastinator I am, I haven't looked at it until now and the assignment is due Friday. The...

Hello, I am currently studying the 3-body problem and I am struggling to find some examples of exercises or resolved examples. Can anyone point me to a good book or resource I can download? I found a few good ones for the two-body problem when I was studying it and they were very useful...

Does anyone know where I might find some learning resources on expansions/compressions of graphs - in particular, taking the compressions/expansions/translations and writing the function? I'm finding this very counter-intuitive and have gone over all the material I have on the subject for the...

I need some good online resources for learning statistics. Can I opt for video tutors, suggestions please...

Hey, sorry if this is the wrong place to post this, I'm new here I'm in high school and have read several books on nuclear physics, and have become very intrigued by it. I am wondering were to start in terms of good learning resources for physics and nuclear physics, and how to go about...

Hi, I just started gr 11 physics, and I need help. I don't really understand the concepts being given and I want to learn more, so if you have any good websites or books that will help me, please list them Thank you!

Hey guys, I should have posted here near the beginning of the semester. I'm in a Thermo class in a Mechanical Engineering program. I'm having a horrible time understanding the material. It doesn't seem difficult, but for some reason it's just not clicking. The textbook is extremely obtuse and my...

Dare I suggest another sticky? (Apparently so.) Atomic Rockets Forensics DemystifiedCommonly referred-to scales: http://tvtropes.org/pmwiki/pmwiki.php/Main/MohsScaleOfScienceFictionHardness Kardashev Scale of Technological Advancement @ Wikipedia Unsure about whether or not to include more...

My students would like to become engaged in the construction of robots. I am not sure what the best options are for kit purchase or DIY-type. I was also curious of any national organizations that might have funding opportunities. Thank you.

Now obviously String Theory has been responsible for some valuable research, and even if the theory were completely disproven (although I don't see how; my understanding is that it is still too vague in it's predictions and descriptions to be proven or disproven conclusively). But String Theory...

Hi everyone I just finished my first year of electrical engineering. I am doing quite a few of self study for coming Calculus II and III, diff. equations, physics, and computer programming classes. I have all the resources I need for those. However, I want to start studying the basics of...

Tomorrow I'm taking a certification exam to become a college math tutor and I have to take a proficiency test in pre calculus. A lot of the stuff I don't remember because I haven't used it in a while. Anyone got some good online resources. I studied before but I just realized yesterday after not...

Hello, I'm finishing my degree in nuclear engineering and I'm talking to one of my profs about building a neutron producing fusor device as my thesis project. Can anyone please recommend me some good, serious resources on how to actually build these things and how they work.

Lately, I have become interested in learning math methods (actually reviewing, because I have taken a math methods course already). I have watched some of Prof. Strang's (MIT) Math Methods for Engineer videos, and couldn't say that I was a big fan of that video series. For one, it was for...

Suppose I need a theorem or to know whether some result has been proven (or not), to prove something else. What are the best sources? Where would I find, for instance, if there is a proof that there exist (or does not exist) integers m and n such that {e^{m/n}} = \pi?

A coworker asked me if I had any recommendations for Java learning resources; I thought about it and really didn't have many since my programming life has been an odd mixture of Python, Fortran, and C++. And this got me wondering, does anyone have any good suggestions for Java learning resources...

Hey, it seems there's an abundance of valuable learning resources online, especially on youtube, but, it's not always organized as well as it could be. I think we should compile lists of youtube lecture series that span entire undergraduate curricula for all sorts of engineering, science, and...

Sorry if this is the wrong section, it wouldn't let me post in the Science Learning Material area. Basically I started self-studying Mary L Boas book Mathematical Methods in the Physical Sciences. I've seen a lot of great things about the book and I know it's very popular in Mathematical...

I'm interested in building a model rocket. Someone told me about water rockets and this looks pretty cool but are there any other guides or videos you can refer me to? I also have no experience in rocketry

Take a look at the following problem: "A rubber band with initial length L has one end tied to a wall. At t = 0, the other end is pulled away from the wall at speed V (assume that the rubber band stretches uniformly). At the same time, an ant located at the end not attached to the wall...

Does anybody know of any good resources they can point me to for implementing PI control in an embedded system? I'm not necessarily looking for PID control - just PI. Books, websites, etc. - any suggestions are welcome.

Hey Folks, I am a new member to this forum. I am really in need of some guidance hope u people can help me out. I have 3 years of experience in IT Infrastructure ( like service desk, monitoring etc) I am unemployed for past 12 months. I am planning to pursue Graduate Management Certificate...

i am new to the APDL in ansys and i need some basic books or sites to learn APDL

I have been offered a research position which requires knowledge of these. Both are easily acquired and I should have everything running by tonight. What books or documents would anyone recommend on these?

Howdy all, Recently I have dabbled in homebrewing mead and it turned out... drinkable at best. I am making another batch soon and want to improve my methods. I am a nuclear engineering student, so naturally I feel that something as personal, liberating, and chemically miraculous as...

Does anyone know of any good resources online of where I can get clear and simple explanations on this subject? I don't want to read journal articles about this or want websites with heavy duty math since I don't have time to go through all of that right now in that kind of depth. I just want...

I've been looking for some good resources on integrals in four-space (SR and GR), and hope someone can suggest some! I'm not too interested in abstract mathematical formalisms to the extent of pure math though, I must keep in mind that this is all to do with physics (at least for me!). I know...

Hello everyone, I am currently taking an introductory course in linear algebra. I am beginning to struggle with concepts like nullity, bases, spans, etc, and my college book is not helping. These are concepts that are very abstract to me. Could you guys point out web resources or books that...

Hello I am writing an essay entitled "popularization of science in the media - friend or foe to science?" as an assignment. I would be grateful for recommendations of online resources that would help me on this, ie. are there groups that have done surveys and studies on topics such as...

Have my first physics exam Thursday which I am told consists of 6 questions and one proof. I am curious on thoughts of what a proof on an exam may consist of, and it there is any pages or books I could reference to give me some basic proofs or ideas of what I may see on the exam and how to...

Hey Everyone, I am extremely glad to have found and joined the physicsforums community, and look forward to working and learning from others who share my enthusiasm. I'm currently enrolled in Precalculus, but find the class to be a little slow and really scripted towards teaching students the...

Hello What is the better book on introduction of optics? if you have on online please give me the link regards

Hi, what is Liquid Sprays how it is formed Do u have any PDFs or textbooks related to this

Dear all, In this coming fall, I will be assigned Physics Lab as a teaching assistantship. Does anyone know a book or any other resource that can help me in mastering physics lab challenges. I need a book on measurements and instrumentation where i can find data manipulation techniques. Does...