Knowledge Definition and 373 Threads

I am a physics undergraduate and is going to pursue a physics Ph.D. degree from 2015 Fall. I am thinking about learning some programming language to enrich my knowledge. Also, I hope this kind of skill could enlarge the scope of my future career. Please give me some advice on which language...

My question is this: how do I break the chains? I took honors physics last year and absolutely fell in love. Unfortunately we don't have any Calculus-based physics courses in my school… I've asked some of my teachers for textbooks I could borrow and they've been nice enough to give me some...

The question is pretty simple really, do we have a complete knowledge on the different wavelengths of light? Or are there possibly other sources of light out there that are unknown to us?

Hello Everyone, I am a young college student that just realized how little of an education I received growing up and attending school in Southern Mississippi. I won't say that it is entirely the fault of my teachers, as soon as I realized I could graduate while barely passing Algebra one I did...

Hi, just curious, I have taught myself a good chunk of statistics , up to non-parametric methods, but I don't have any official proof of it, i.e., I don't have a degree on it I could use to convince a potential employer. I know in other areas one may use, e.g., the GRE to show one's competence...

How is knowledge in physics produced? When I think about how Newton's First Law of Motion was produced, it first came from intuitive thought experiment due to the observations made. Can one actually observe an object moving with a constant velocity without any force acting on it? Or is reason...

considering the eprb experiment, the correlation is written in terms of local hidden variable : The density of probability at the source is uniform it cannot depend on the measurement angles. Rho(v) The measurement are made at the two places a(ta,v) b(tb,v) The datas are the recollected at...

Happy New Year from Athens/Greece :D Enjoy the Knowledge of PF Seek it in your Real Life!

Einstein education was just formal , then how did he got to know all about current research at his time. So did he studied all by his own?

I disagree. Knowledge is energy. The use of knowledge is power. Knowledge is a potential energy. Anyone agree/disagree?

Hello, I am an undergrad doing Computer Science BSc, but that's all irrelevant. I started learning to program when I was about 12 and I've become very proficient in PHP, Perl, Python and C# and I have really good knowledge of C++, C, Java (and I'm a quick learner). I have done a lot of...

Hi! I have recently started working at an automotive company at the body and trim section and I feel like learning everything about the area. I have had trouble finding good study material at the library and with my searches on the internet so therefore I ask you guys for some help. From...

Give us a set of examples of what you do regularly and how your education has played a part in that process.

This is a question about how much general knowledge about science and math has changed since Einstein's death about 60 years ago. What are some ideas in math and science that have been discovered that Einstein would have had no knowledge of?

hey everyone, I`m a b.tech student in electronics &communication.though I`m okay with theory but I feel I`m way behind in practical knowledge and skills. my college doesn`t provide us with proper laboratory facilities.so,is there any way I can achieve practical knowledge??

1) 10 Hydroturbines are in a line, fitted inside a 1m diameter vertical tube its height 1.2km. The top of the tube is 100m deep underwater in a high mountain saltwater lake. This 1200m long tube acts like an orthogonal drainpipe down the mountain. Hdyroturbine-A...

(sorry in advance for not knowing how to use laTex and also not knowing calculus, I thought maybe before I teach myself calculus to figure out this one problem maybe you all could fill in what I'm not figuring out... Thanks in advance...) I recently found out that I needed to know calculus in...

I'm not sure if I'm going to get any answers here, but I was just wondering... have any of you ever used your physics (or engineering/electrical) knowledge to play some kind of prank on someone?

Native English speakers! Please tell me all the words you know which is in the same genre as :Thou,thy,thine,shalt and Lo!. They are the only old words I know.

I am not sure whether this needs to be transported in another topic (as academic guidance). I have some preliminary knowledge on tensor analysis, which helps me being more confident with indices notation etc... Also I'm accustomed to the definition of tensors, which tells us that a tensor is an...

I'm doing a computer science degree this year, I might do a second major in physics next year, but I'm not sure if my maths is up to scratch. I never did much maths in school apart from basic things in math A, it says that I must have done maths B as a prerequisite for the physics major (which...

Hi all. So I am working for a multinational firm doing an engineering analysis job. I have two options in for my career. My career started as an analyst and till some point of time, I guess it would be the same until after some years I would be going for maybe some leadership positions. So...

Wikipedia says it a collection of culturally valued knowledge. What exactly is culturally valued? These are the types of questions generally asked: - 1) Name of the nth U.S. president 2) Location of some river or place 3) Birthdate of some famous person etc. Why are these questions...

In my college every month we have test and assignments on various subject, if one want mark they can just copy the notes from an website and submit it has assignments without having any idea of why assignment is really given and what is about.in test many of them simple memorize and vomit...

Hello all, I have boiled a very long physics problem down to the point that I need to solve the coupled equations \frac{\partial^2 x}{\partial u^2} + xf(u) + yg(u) = 0 \frac{\partial^2 y}{\partial u^2} + yf(u) - xg(u) = 0 We may assume that |f| ,|g| << 1. and that both f and g are...

First I want to admit that I don't understand how calculus can give you a correct answer. But I do know that calculus is used in almost all fields of sciences. So, I think either what I know about calculus or my conception is not correct. Here is what I know and what I think about calculus...

I am BSc Physics graduates 3 years ago . After graduation I went into a totally different field "Accounting". (allow me to skip the reason here) I am so regret now. My passion is still in science and I want to return to the world of physics and hope to be a researcher or any professions in...

Hi all, What math and physics books I need to read before I am able to score well in physics GRE. I just started with Apostol/Spivak for calculus. My question is what should I read next? Real analysis vs multivariable? or rather, Spivak should be enough to handle the required math for physics...

I feel it quite difficult to prove this equation: \frac{1}{2}tan(\frac{1}{2}x)+\frac{1}{2^2}tan(\frac{1}{2^2}x)+...+\frac{1}{2^n}tan(\frac{1}{2^n}x)=\frac{1}{2^n}cot(\frac{1}{2^n}x)-cotx Can you help me with it?

I have studied both single variable and multivariable calculus. I was younger and spent hardly anytime on them but did fairly well at the university level. I regret now that I did not master the subjects as I have an intense passion to learn ODE's. Do you think I should start studying...

I am only in high school, but I know how engines and cars work and I understand the concept of both. I wanted to know where I could go from here to advance my knowledge on mechanical engineering past basics and more towards what I will be learning in college mech engineering classes Thanks...

I'm asking this question here on a physics forum because a physics question sparked this off. However, it is applicable to all aspects of scientific knowledge. I am looking for a scientific knowledge dependency graph. This is one centralised database which captures the specific and required...

To all PFers who have played "Where's That Landmark?" over the years: it's all just an elaborate exercise to prepare for this game: http://geoguessr.com/ Lots of fun :biggrin:. I think I got to 12,000 once, I'm *certain* folks here can beat that.

I haven't seen a movie trivia thread in here. So I'll give this a go. The rules are: if you answer the current question correctly you get to ask the next one. Simple, huh? Only one question at a time, please. If no one correctly answers a current question within 24 hours of the posted...

In Six Easy Pieces, Richard Feynman said If such a cataclysm actually occurred, and you could preserve just one piece of scientific knowledge for a future race, what would it be?

Hello everyone! This is my first post on PF, but I've been reading the forums for some time now. My question is rather a simple one, but since I'm an Electronics Engineer, I think it would be polite to say a few words about my education and work experiences. I've finished 4 years of...

Hello all. I was just wondering what kind of things I would need to know if I wanted to become a nuclear physicist? I'll be honest, I've never been very strong in any math or science. Almost every teacher I've had in math or science has pretty much crushed what little confidence I had in both...

In problem of infinite potential well particle can't be in a region where ##V=\infty##. How we know that in case of finite potential well that particle is in the region where ##V>E##. How we know what is energy of the particle in moment when we localize it in the region with potential ##V##...

So I would like to do an ecology course somewhen during my undergrad, but the requisites for a General Ecology are just too big: -1 year in Zoology and Botany -1 year in General Biology (in order to get the Zoology and Botany) I have studied myself the Smith ecology book and don't find...

Hello everyone! I am a high school student who is in grade 10. I've developed a passion in Math and Physics, and I intend to be an engineer in the future. However, I don't feel satisfied with the Physics knowledge I've picked up from school, so I seek the book Physics for Scientists and...

Repeatedly in the past few months any attempt at learning more advanced physics has ended in hitting a brick wall: my maths knowledge is really not up to par. To put this into perspective, I am an A Level student but feel as though the current syllabus for the sciences is really not enough. I...

Hey forum , I was looking desperately for methods to broaden my knowledge of physics in all it's domains . I mean I do fairly well in Material I learn ( Textbook Physics) and I have a fairly solid foundation but I'd like to know more about different areas of physics and not just a vague idea...

I do a small theoretical project, in this project I need to investigate some technologies or devices or knowledge that must to be related to cars or to futures cars or cars industry, it can be all the kinds of cars, not only private car, it can be also buses, tractors, trucks or all others kinds...

Hey everyone, I'm graduating with my bachelor degree in physics soon and intend to study physical electronics and device/semiconductor physics in graduate school. I've taken the standard undergrad physics curriculum (quantum mech, stat mech, electromagnetism, circuits, experimental physics) with...

Hello, I was looking at an Introduction to C++ class I might be taking next semester Description: This course is an introduction to the basic principles of programming using C++ as the development tool. Topics include the structure and design of algorithms, input/output, branching...

Hey guys, I have to admit that my knowledge of this stuff is probably quite lacking in comparison to most other people's but I was wondering if anyone had some resources I could use to look into regarding nonlocality? From what little I do know about Quantum Mechanics is that Einstein had...

I thought one day that Newton found that the gravitational acceleration is 9.81m/s^2 down and used that as a constant before he discovered or claimed Fg= GMm/r^2. As far as I know G is a constant today too. would it be correct to say that as long as there are constants we lack in the knowledge...

Hi everyone, I want to know what disciplines must I study to become an effective numerical modeler? As a numerical modeler, I expect to be able to generate numerical solutions to mathematical problems (via programming) at the same time I want to be able to explain all aspects of my...

I'm a pHysics major freshman and I know lots of college physics and math, lots of which I don't get to skip in college.

How bad is my statistics knowledge based on the following mind map? Any concepts which aren't bold are the concepts that I know; the bold ones are the ones I'm currently learning. The mind map in question: http://i.imgur.com/4He3f.png What should I learn next based on my current...