Physics forums Definition and 43 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...

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 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 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...

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

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...

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...

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)...

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?

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

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...

Here's the inside scoop on the backroom wheeling and dealing going on as we speak concerning Robert Altman's upcoming project, Physics Forums: For reasons that should be obvious to anyone who has seen Contact, Ivan Seeking will be played by Jodie Foster. The lovely, mischievous Math Is Hard...

Pf? I'm curious, 'bout the history of PF. when did it start? who started it? who owns it? whose idea was it? who created it? Perhaps Greg or the mentors would care to answer?? :confused:

I just wanted to thank everybody that has helped me so far and will in the future. I know that I am new to this forum, but I want you to know how completely excited I am to have found a resource for help. The class I am taking is a lab format, in which we must essentially work on our own from...

I am starting this thread for me and anyone that doesn't understand any language used in the PF forums post it here so people can say what it stands for. I have been confused once or twice in these forums. Anyway it will probably turn into something unusual like the other threads. :biggrin...

Do U. S. Intelligence agencies (or other international spy entities) have any interest in monitoring Physics Forums? Subversive elements such as terrorists in search of classified material might seek to exploit our discussion group. (I recall early on in PF that a Middle Eastern person sought...

I need to prove to my teacher that i know how to use physics forums, so can i get a response?:smile:

I'm interested in peoples' thoughts on the pro-life people who murder doctors. I'm just after opinions, thoughts about the different values at work, et cetera.

Think back to what you believe is the most outstanding accomplishment to evolve out of Physics Forums originality. Of all our Physics Forums, of all our posts and threads, of mentors, advisors and members, what are the distinguished, real-breakthrough scientific discoveries that we have...

My ancestors came to the US during the latter half of the nineteenth century. They were Midwestern cowboys and cowgirls. I want to get back to roots and explore what it means to be a true American cowboy. For this reason, I starting a club for people who want to explore this avenue with me...

Hey everybody here's my newest idea for a thread! Just kick back and relax here! Talk about whatever you want! movies, video games, world events, what's going on, new exciting science AND not science things that you think people should no about! This thread is for all that in more!