Forum Definition and 338 Threads

I love entering a question in google and having PF pop up on the first page. Like I did earlier with a "what are the waste products of fusion" and getting the link to: https://www.physicsforums.com/showthread.php?t=121166&page=2 :-p

Hi, Why latex of this forum is horrible? Sometime it does not write what you are writing. Sometime it does not display latex. Sometime, it does not refresh, it will show the same thing even you delete it. etc...

Hello, As part of a research project I'm going to have to run some relatively (for me) advanced stats. Anybody know of a forum where I can post my stats questions? Thanks! Michael

Update: Well, apparently the problem is just that the preview doesn't work on this site. The actual post is fine. Homework Statement I can't use this forum well, because any latex tags I type in are removed. For example, see the tex code below. In the preview (and probably in the real post...

Does anyone know anything about this forum/convention? My kid is interested in bio engineering, and has been invited to attend the forum. She wants to know if this is a good investment of time and money to attend. I think she needs a mentor, but she claims she can't have one through school...

Hi everyone my name is Erik Ioerger and i just joined your forums. I really appreciate this being on here for i am a high school student and sometimes need help with various topics. Currently my class is covering Periodic Motion, Frequency, and Wavelength questions. Just wanted to thank whoever...

Is there a Math forum as good as this Physics forum? I would like to find it.

I did a search on VectorCAST and nothing came up. I am using VectorCAST 5.1h at work, am an amateur user. I need to find a forum that is robust, engaging a large community of users. Thanks in advance... Rhody...

hey guys, I am taking my first electrical engineering class which is circuit analysis. I am having a hard time with it so i was wondering if anybody knew of a website that has tutorials, videos, problems, etc that somewhat follows the course. the material is tough and it seems like theirs not...

What happened to the "Advanced Physics Forum"? I get a DNS error for the url "http://www.advancedphysics.org/". Google doesn't show any news about a shutdown for that site. Anybody know what's going on?

If anyone has ever played the party game, Mafia, you will love this game! This is a kill or be killed, battle of wits, deception and manipulation between an informed minority and an uninformed majority. At the beginning of the game, everyone will be given a role. Some will have actions that...

hello I am a new member in this forum , and I want to learn well with you...sorry I speak little English,so I use google traductor , i speak french , but with french unfortunately there is a little information! now what is a cavity resonant ? and how to write equations for field within...i...

I'm currently learning Mathematica. Are there any forums that you guys usually surf?

The announcement and discussion thread is here. Please also read page 2 of the applicable rules. https://www.physicsforums.com/showthread.php?t=459349

hiya everyone;) I recently found this forum and would hail success for it ..indeed an excellent opportunity for people of all genera to take help from ;) But one complaint... I didn't find a junior here... I mean doing A-Level! If anybody from A-level please reply... I'll be glad! indeed I...

Okay this has been bothering me for a while, why is it that colleges still force Science students to take humanities courses? Didn't we get it over and done with in high school? I have foreign friends who really excel in science subjects, but they are on the verge of nearly failing (like 60%?)...

Hi. When I write my LaTeX code in this forum, it appears completely distorsionated when I click "Preview Changes" in edit mode. For example: n^2(\rho) = n^2_0\left(1-\alpha^2\rho^2)\right) is shown as a "z" if previously I wrote z. In fact, I don't know if this post will be shown well...

I'm trying to make a post, but the latex is frustrating me. I typed in the following two lines. [t*x]KE=\frac{1}{2}mv^2[/t*x] [t*x]=\frac{1}{2}mv\cdot v[/t*x] It just gives me a v and a dot, intead of v dot v, and it put both equations on one line. I attached an image of what showed...

Homework Statement f(x)= lim t-> x [csc(t)-csc(x)]/(t-x). Find the value of f'(PI/4) Homework Equations I can see that this equation somewhat resembles one of the first principle def'ns lim z->x [f(z)-f(x)]/(z-x) The Attempt at a Solution Not really sure how to begin. I...

Homework Statement limx->0+ [tan(\sqrt{x})-sin(\sqrt{x})] / x\sqrt{2x} Homework Equations tanx= sinx/cosx The Attempt at a Solution I set u= \sqrt{x} Therefore as a->0, u->0 And I get the limit =lim x->0+ (tan(\sqrt{x})-sin(\sqrt{x}))/ (x*\sqrt{2}* \sqrt{x}) = 1/\sqrt{2}lim u->0...

Hello, does anyone know if there exist a free service that would allow one to base up a forum supporting latex for math discussions? just like physicsforums? Thanks.

I'm glad to join this community. I'm currently a high school upperclassmen interested heavily in science, primarily in biochemistry. I take advanced (IB) courses in Biology and Chemistry and plan to Higher Level in them, and then also take SL Physics at the same time, and Calculus AB SL...

One of my teachers, for AP Physics, has made it mandatory for my entire class to register on this particular forum and post three times per week. Although this is not a hugely time consuming assignment, me and many of my classmates have found it difficult to find threads to post on or places to...

Hello! I just finished typing up my first Latex document for a proof I worked on. Now, I'm having trouble posting it on these forums. Here is the source code... \begin{document} $f : \mathbb{R} \Rightarrow \mathbb{R}$ is odd $\;\Longleftrightarrow \;f(-x) = -f(x) \;\forall x$. Show that...

The Advanced Physics Homework Help forum is for upper-division (college junior or senior) and graduate-level questions. Other schoolwork physics questions should go in the Intro Physics forum. Thanks!

Hey guys, I'm obviously new to the forums and as well new to Physics. I'm currently in grade 11 and taking Physics. I'm very interested in it and hopefully this forum will help me develop a greater interest and more knowledge on this subject.

I did not see a forum for book recommendations or reviews. Would be helpful for the student in me.

MATHS INTEGRATION, Wont let me post in calculus forum :( Homework Statement Integrate 1/(sqrt(2x-x^2)) between 0 and 2. Homework Equations The Attempt at a Solution I have no idea what method to use to try and integrate it, I've played around with it for hours but it ends up...

I have to say, this is the most fantastic website that I have ran across in a long time. I particularly like the helpful (seemingly so far?) community and in-depth coverage of virtually every general question I have had in the past year! I was reading through a thread that linked to an article...

Hello everybody this is Clarke new to the forum , hope u all welcome me :)

I was wondering if anyone has recommendations for a philosophy forum, in particular one where ethics is discussed -- theoretical ethics rather than bioethics or other applied ethics.

Hi all... can anyone help me thru these questions... a) % of thinning allowance calculation of tubes while expansion b) standard drwg. for tube to tube sheet weld joints c) Inner Radius (Min.) calculation for floating Head Cover In AES Heat Exchanger d) Selection criteria for...

Hello friends, I am having some trouble with a particular statement an author made in a book. Despite being a statistics question, it is at its heart, a calculus question. Perhaps someone here with a better understanding of the subject can help, because I'm not convinced the matter has...

This is an outside the box/critical thinking game. I was introduced to this in a logic class. The idea is that I state a short story, and the participants have to "fill in the blanks" by asking yes or no questions. Note that the literal answers to yes or no questions can be very misleading...

Homework Statement Express the function cosh(2x)+2 sinh^2(x)= in terms of exponential functions. Homework Equations The Attempt at a Solution i have an answer but I am not sure if its right can someone check please. =1/2 (e^2x+e^(-2x) )+1/2(e^2x-e^(-2x)) if this is right i need some help...

I hope you can help me with this problem. A few days ago, I began a post with a LaTex equation in it, but never completed the post (I got the answer I needed). I'm trying a new post today, and no matter how or what I enter as LaTex, when I preview the post I see the equation I tried to use a...

Homework Statement A 3.80 kg block is in equilibrium on an incline of 38.4◦. The acceleration of gravity is 9.81 m/s2 . What is Fn of the incline on the block? Answer in units of N. Homework Equations The Attempt at a Solution FgsinΘ=mgsinΘ=3.8*9.81*sin38.4°=24.04...

I am a graduate of a 4 year degree in Physics education and participating into this forum is right for me. Hope to participate soon in the discussions here.

Hi there, Many of the problems on this part of the forum simply boil down to "I don't know how to solve the ODE: <some strange ODE here>" I kind of forgot how to solve many of these problems myself, so I've just been giving people the answer from matlab's dsolve function. Is this...

I find that this forum supports LaTex which is awesome that we can type formula.But what version is it? I need to know because I don't know which translator to choose when using MathType. Thanks

Homework Statement i have quadratic form x^2-xy+y^2 how can I check if this form has always same sign (+ or -)?

Tonight's episode of Naked Science on the National Geographic Channel.

I’m not quite sure what I’m doing on this forum. I was sent a gift subscription to a science magazine and was so delighted with it; I gave a grandson a subscription to the same magazine. We get into lively discussions regarding the contents of the various issues. He challenged me to read Stephen...

Google Tools... I want to know if PF forum members regularly use: Google, alerts... http://www.google.com/alerts" and if getting e-mailed links has helped you find or research information (Note: to busy college students...), or to keep abreast of breaking news ? Have you tried...

Hi, Do you know any TI-89 support forum? Thanks.

Forum Game -- What's that movie? Similar to the landmark game. First to correctly identify the movie posts a new pic for a new movie. You are then responsible for giving clues (after a couple of days or so if its really a stumper), and deciding the next winner. Here's an easy one to start:

Dear all, Unfortunately, we have just learned of the death of one of our members, negitron. Since he was a valuable contributor in this forum, I am posting this announcement for those who might not have seen it in the General Discussion forum. Feel free to add your thoughts, if you wish...

I'd like some pointers to a good forum where I can go to ask general computer questions - usually to do with my network setup. According to Linksys Tech Support, BOTH my Linksys wireless routers got pooched on the same day. My network is old enough that it may be time to replace them anyway...

are there more advanced forums than this for astronomy/cosmology? I asked a few questions without reply on here so I guess I need higher level forum.

I need help Downloading ALL attached pictures of a forum, the pictures are posted on the website under \attachments. I have tried using Extremepicturefinder and picture ripper, but both programs have trouble following the links and threads. All of the pics are posted under a single category but...