Physics forums Definition and 67 Threads

Hi, I uninstalled the PF app from my Android. Now I can't see it anymore on Google Play Store to reinstall it. Can you help me ? Thank you.

I still find that the lists "What's new", "New posts", "Hot threads" and so on, are ineffective feeds. There are many posts that are published a day and it is easy to miss the post that might be interesting. I would be great if we could filter the list by forum (quantum physics, classical...

I think a specific forum for history of physics and mathematics here would be fun. It could also help some users understand the origin or the motivation of whatever topic they are studying. There is a forum for for art, music, history and others, but it seems focused on discussing many things...

I am trying to see all the posts that I have started, but it seems there is no link anywhere that says My posts. Could someone please let me know how I can pull up a list of all my posts? I need to do this because I want to make sure that I am not duplicating an older post.

Are any members interested in a chess club/thread? It could involve both play and intellectual/"nerdy" chat and analysis.

Hi everyone! First of all I want to congratulate @Orodruin for his book publication! I myself thought that maybe someday, I would like to write a book. So I became a little bit curious about other titles that may have been written by Physicsforum members. I hear Benjamin Crowell is also a member...

Hello, this is my first question on Physics Forums and is a question on how to ask questions. I have been using LaTex for a while already. I wanted to post a thread about classical field theory. I tried to use \newcommand just to make easier the typing of expressions such as...

I think he's pretty much nailed the relativity, QM and BTSM forums: https://xkcd.com/1861/ or https://m.xkcd.com/1861/ for mobile users.

Hey everyone, new to Physics Forums and happy I've found it. To start, my name is Shane, I currently work for Applied Materials. We engineer, maintain, and support tools in the semiconductor industry. I'm 21 years old, and currently on the Global team. Meaning, I travel 90% of the time...

Hi everyone! I'm really sorry if I'm using the wrong forum. It's my first time at PF. I'm pretty new to physics, as I began studying it just two years ago, but I'm really interested in the subject of astrophysics so I bought myself and started reading 'Introduction to rocket science and...

When browsing physics forums using Chrome with Windows XP on an NVidia video card, I occasionally get a blue screen of death. I don't recall this every happening with an AMD video card. With the NVidia video card, it only happens when I'm using Chrome and browsing physics forums. I've never seen...

ZapperZ submitted a new PF Insights post The Most Important Thing You Can Learn from Physics Forums Continue reading the Original PF Insights Post.

Background image compliments of Teacher Juanfran

Hello, I would like to know the amount of torque required when the flywheel starts? I know that once at speed the flywheel doesn't require torque. I would also like to know what size of slip ring induction motor to run as the below mentioned speed. The weight of the flywheel is= 6500 kg ( wt...

I have a question about data modeling and statistical methods. Which subforum of PhysicsForums would be most appropriate to ask such a question?

I believe i will enjoy being part of this forum with positivelly contribution and to broden my knowlge. Thanks

Homework Statement Sheldon moves a box of comic books to stuarts comic book store by attaching a rope to the box and pulling with a force of 90 N at an angle of 30. The box of comic books has a mass of 20 kg and the coefficient of kinetic friction between the bottom of the box and the sidewalk...

Homework Statement A coil with an inductance of 2.0 H and a resistance of 10 ohm is suddenly connected to an ideal battery with E = 100 V. At 0.10 s after the connection is made, what is the rate at which: (a) energy is being stored in the magnetic field, ans: 2.4*102 (b) thermal energy...

This is primarily for fun, but given our experiences here at PF, it could be an excellent crackpot detector tool! Next time you read a post that sounds a bit off, refer to this index. It was compiled by PF staff and science advisors. The higher the point value, the greater the chance it's...

Recently, APOD (Astronomy Picture Of the Day) posted two computer generated videos. They are Orbiting a Black Hole and Circling a Black Hole at its Photon Sphere. APOD says that the videos are scientifically accurate. But here on PF (Physics Forums) many attempts by myself and other...

Hi. I didn't know where were to introduce myself so I thought I'd post it in General Discussions. I'm 19 years old, studying Business Management. But early 2012, I got hooked with physics and I've been reading articles, books, listening to lectures and watching documentaries whenever I get...

Physics Forums Movie "Night"! Hey everyone! Evo gave me an idea; Selecting a movie, as a group, for all of us to watch during a given week and then dissolving/discussing/commenting on it until the topic's dry. A variable movie club! It might be fun to do once a month or so. If...

Hi my names DocHoliday. I see how many very insightful and well written pieces you guys have had on numerous problems and thus have decided to join the forums. A Large Thanks to the whole community is in order as you have helped me through a few things without me even being a member! I'm...

Physics Forums was mentioned in the article about the German students attempts to find a closed form solution to the air resistance problem. I am not sure if Alan Boyle is a member around here since I have been MIA for a very long time on PF. Check it out...

Hey, I am new to physics forums with, as you can see, a small number of posts. But I have read a lot more on these pages than this number conveys. I am wondering if a lot of you guys are professors? You all seem like you have PhD's in physics, and I am really blown away by how much you guys...

Have you ever referred to Physics Forums to help in your professional capacity?

Sunday is quiz! Announcing the Physics Forums Quiz Sunday October 16th 2011 20:00 GMT or 15:00 CST or 22:00 Brussels time This coming Sunday will see another Physics Forums Quiz during Sunday's chat session. The quiz is just for fun and all are welcome! The quiz will take...

A video I found where an amateur physicist is pretty angry at some moderator. Just wondering if the mods have seen it.

Yes, I know it's a *silly* idea. But I'm just curious ;)

hi everyone, I am new to physics forums and am struggling with Laplace. I have been given 3 problems: a) sint-tcost -> find the laplace transform of the fiven function without using table b) 3/ s2(s2-a) -> Find the inverse laplace transform of the given function c) Ln (1 + sinx) ->...

I know there's already a thread named "Best of Physics Forums General Discussion." this is different. I am going to be teaching a class of 40 from next week for a month and I wanted to give them some reason to stop being lazy and use the net for good returns. Below I have listed some good...

Against general, scientific or physics discussion groups, is there an objective measure of PF's success?

An object of mass m collides with a spaceship of mass M that is freely floating in intergalactic space. The mass was moving with a speed of v relative to the spacecraft and after the collision it sticks to the spaceship. Estimate the probability that the collision won't affect the...

http://www.alexa.com/siteinfo/physicsforums.com Look at those drops! Apparently everyone is too busy popping champagne bottles open on the new year to help kids figure out projectile motion. I bet the trend will happen again in 2010! :eek: What will we do!? Who will explain to the Calculus I...

"Physics Forums" Logo...distorted? Now I love it, its simple, direct and goes nice with the style of the forum. But there is one thing bugging me about it: Or is it just me?

When we discuss some topic here with other posters, you have limited information about them. You often don't know their real name, their age etc. etc. According to the MWI, this then means that the other people you are talking to exist as a superposition of all possible real persons. E.g...

Pretty neat website I stumbled across: http://web.archive.org/web/*/physicsforums.com There aren't too many pages in their archives for 2001, but there's enough. Any thoughts from those who were members?

Up to the present, what concept formulated here on Physics Forums do you consider the most outstanding?

Hi, is it possible to use the TeX Editor external? A link which leads to the TeX Editor? Thanks greetings

Sorry didn't see this forum. I need some help with calculating simple theoretical parallax error: https://www.physicsforums.com/showthread.php?t=257036

Dear PF, Your last help to my tech support was very helpful and i thank you all for it :). however since i am new to my TI-Titanum, i unfortunalty have another stupid question. i was using the "slove(" function. and i inserted into the home screen (exactly what i typed in)...

How many people remember the days of the birth of the www? I cut my teeth on Dr. Neutrino back in '96. It's only been 12 years, but seems like a lifetime.

I can't get LaTeX to newline on these forums. The following code produces the LaTeX output shown below: This\ is\ the\ first\ line \\ This\ is\ the\ second\ line \\ This\ is\ the\ first\ line \\ This\ is\ the\ second\ line \\ Isn't "\\" the newline command? Why isn't it working?

Make your own radom eassy of any topic: http://radioworldwide.gospelcom.net/essaygenerator/

What is physics forums motto?

I made a homepage just for physics forums users. I'll probably add a news "block" soon too. With Physics Forums link: http://physicsforums.technobound.com/ Without: http://www.technobound.com/ I can make custom pages if you want one for your website too :) just throw me an email...

Who created Physics Forums? Who is its founder? Does anybody owns it?

It seems to me PF is well-attended enough to get its own IRC channel. Not that that is much work, of course, but still. Maybe this is a rather nice idea, since some threads start looking like a chat already.. Of course, I can't start an official PF Irc channel on my own, since I am rather...

...when a young penguin type fellow could start a thread like this: https://www.physicsforums.com/showthread.php?t=103616 and almost all of the people here would instantly understand it was humorous. In fact, they would pitch in and add to the humor, extending it and developing it, all...

A question regarding a somewhat complex physical system: us. The staff of professionals in Physics Forums may be noting interesting behavior concerning the time evolution of the number of visits a certain thread have. The numbers of views in general fall into very distinguishable classes...