Thread Definition and 503 Threads

it seems that there are a lot of threads on which textbooks are best for varius subjects (mainly physics and calculus). so, i started this thread to see everyones view on the best textbooks for subjects related to physics. i'll try to make a list of the best ones for each subject. so, tell us...

Any fans of the West Wing here ? I had a near spiritual experience during the last episode I watched (an old one, on Bravo). This is the one where Bartlett has to decide whether or not to run for a second term (and his secretary Ms. Landingham dies in a car accident, and he goes ballistic on...

This is a thread to ask why. Here's one on my mind lately considering Arnolds threat to run as President. If conservatives hate liberal Hollywood types, then why do they keep making Presidents out of actors?

Feel free to post any pre-election polls, exit polls, opinion polls, market prices or counting results as they come in. Here are some links to get you going : Electoral Votes - a compilation from various sources The Iowa Electronic Market...

We should probably have a QG thread focused on the work of the Uruguayan physicist Rodolfo Gambini and his co-workers, such as Jorge Pullin (LSU) and Rafael Porto (Carnegie-Mellon) and others. I will get some links. I would like to understand better how Gambic QQ fits together with more...

Well, I'm pretty sure this is impossible. But anyone have this proven. I need to try n prove this for my class. Any help is apperaciated. By the way, killer whales top speed is 13.5 m/s, he jumps out of the water at abotu a 45 degree andgle and the pier he jumps is 15 feet high and 10 feet long.

Yet another "spaceship moving at .9c" thread What I'd like to see a thread about is what would happen if a spaceship, moving at .9c, were to impact a planet. Let's say the spaceship was 100,000 metric tons, roughly the size of a Nimitz-class aircraft carrier. It's not hard to figure out the...

j/k.. everything has an opposite.

This one's for u, jimmy p. Whenever you visit after one of your bouts of workaholism, you'll always find this thread around, where you can tell us of your adventures. We'll meanwhile weep teary-eyed in longing for your return.

What u think of feminism? Is it a complete ideology? Can it be a solution to the female problems (if there are)? hope to have a cool discussion...

Suppose in a scenario a weight is hanging on a string from a rod. There is a second string at the end of the weight: ------rod--------- ______|___thread1 ------weight----- -------|---thread 2 Now suppose a person's hand pulls on the bottom string. How would the force diagram be...

I've got nothing to say, except to say that I'm curious and would like to know if armpit odor comes in a variety of smells. What purpose does this variance serve, if any? I did a search on the internet, and could not find anything relevant except for A LOT of articles on botox, which in...

Hello, all, I guess this must be a very shallow question to most of you guys as I am a new comer to this forum. As I found that the universe far far larger as I imagined, all the stars in the star chart must only belongs to our galaxy, so are all the constellations also belong to our...

Hey guys, I was wondering if anyone could tell me some books that just have problems in them for algebra and algebra two principals. Basically say a book that just has 1000 problems with the solutions with brief explanations for each type. So 1000 would be divided into exponent, radical...

As last thread about laser question, Don't tell me some good information here as a new question. Is it like the external world humans laser gun in principle within some secret stories. That is very powerful no source laser gun.

ok, which is it?

Another annoying one divide zero thread. :) The statement : | 1/0 | > 3 is, a) true b) false c) invalid I'm happy enough to say it's true but what do you think?

can anyone guide me my way to become an nuclear engineer

Archived thread "Volumes of Regular Icosahedron and Regular Tetrahedron" Hi, The above-referenced thread is at this url address: https://www.physicsforums.com/archive/t-3876 I have something to add, having worked with this structure, in a bit of a different way, however, than is spoken...

Hello... 1. In baseball, there are 24 different "base-out" configurations (ruuner out first - two outs, bases loaded - none out and so on). Suppose that a new game, sleazeball, is played where there are seven bases (excluding home plate) and each team gets five outs an inning. How many...

I responded to Ulmo in the sci. Physics strings in regards to the Ekroptic scenario versus the cyclical universe. I know this might be out of context of this thread but I saw it as a opportunity to place the question before you. The idea is...

this is a separate thread for sharing page references in the heimskringla of Snorri who was a nominally christian Icelander born in 1177 the Heimskringla is a long book with many chapters one chapter for each of the kings of Norway (or rulers in case of no norwegian king) because it is...

Here is another problem I'm having trouble understanding: A narrow but solid spool of thread has radius R and mass M. If you pull up on the thread so that the center of mass of the spool remains suspended in the air at the same place, (a) what force must you exert on the thread? (b) How much...

Poll regarding creation of an "Engineering Napster" thread Hi all, I've been debating starting one of these for a while, and Tom just mentioned that he's got enough engineering links stored up to start one. What is the consensus about how you all would like to see napster threads?

This is a lim-e-rick thread As you can tell from the head If you are a writer Please pass the lighter Otherwise my face will go red [:mad:]

Lets just take a moment to marvel at these two fantastic and free mozilla products! :smile: http://www.mozilla.org/products/firefox/ http://www.mozilla.org/products/thunderbird/

a weight is attatched midway to a thread which hangs vertically from a ceiling.another weight is attatched to the bottom end of the thread.where along the thread will it be most easy to cut and why?

You know, Adam posted a video that showed Americans shooting a wounded iraqi next to his gun while cheering... Well I saw it again on CNN late last night but I got quite a different interpretation. The feature was about how many young soldiers have to live with killing, and how it affects them...

ALOHA! I'm doing a career project for my science class, and I chose quantum information science. One of the major requirements is to get an interview from a professional in the field. I have e-mailed about 5 or 6 scientists in the past 2 weeks, and have not (to my great dismay) received a...

http://img28.photobucket.com/albums/v83/cjsKtU/b11ngoo.jpg Postulate is 1/2. The theorems are not set. You do that.

Can someone linke me to the .pdf file or the thread that showed how to post math symbols in your post? I did a search on multiple queries, but none gave me what I was looking for. Thanks.

Can anyone tell me where to learn more about the "Thread" theory? I saw a guy on Letterman talking about the smallest part of an atom possibly being threads of sound. Is this familiar to anyone? Does it have any merit?

Personal attacks on others, whether you don't like their opinions or for some reason, are off-topic in the Thiemann thread. This is a special thread for Eigenguy to say whatever he wants without trashing the discussion of Thiemann's paper or some other thread. Dragging the Thiemann thread (which...

LPF, you suggested starting a thread on BH ringing modes and/or natural units. I started a thread in "Stellar Astrophysics" forum

I think, pretty much - never mind. I tried to watch Integral's link to the PBS video, but I need to use Ivan's computer with the high-speed connection and that just isn't going to happen any time soon. I have so many questions, even I can't get them sorted out enough to make sensible posts. I...

What do those envelopes mean next to the thread subject?? What do those envelopes mean next to the thread subject. what are their meanings?

Well the nutcase thread inspired me to post a very brief and rather dry essay I had to write once for a TOK class. It examines the possibilities of determining whether a claim is pseudoscience or real science. I uploaded the .txt version of it. And on second thought since it is short...

I'd like to start a discussion/debate of nuclear power for the purpose of informing people about it. I am participating in a thread in another forum http://www.badastronomy.com/phpBB/viewtopic.php?t=9370 where we are discussing an article about Germany planning to phase out nuclear power. I...

In sunny England, there is a 3 part tv programme type thingy on 'The Theory of Everything' in which string theory stars. I am one for embracing new ideas, but string theory sounds like a load of old hats to me. It may be the wishy-washy way that they present it with tons of special effects and...

I had an idea, and we'll see how this plays out. The premise is simple. I'm sure you've all played that word game where you write a sentence or word at a time and see how it turns out. Same thing here, just in paragraghs. I'm sure greg will be happy to eat up less disk space:wink: So we're all...

Let's see ya... c'mon don't be shy ok ok I'll go first btw, please don't print this photo and throw darts at it... thanks also when posting your own, for the database's sake try to optimize and crop as much as possible to reduce the file size.

who's read any Shakespeare? what did you read? how was it? any favorites? worst? I've been reading a bunch of Shakespeare recently, including: Titus Andronicus, Macbeth, Julius Caesar, and i have a couple more coming along. i liked Titus a lot, Macbeth a little and i loved Caesar. but i...

This is thread #1001 in the general discussion forum! woohoo! This sentence is not false. :smile:

Is it just me, or did the 'fate vs. free will' thread vanish? I know that approximately 7 hours ago I made my last post to that thread, and got a weird error saying that the page couldn't be displayed. After that, I got the same error when I tried entering any specific forum on PF. Now the...

I want to rediscover the religions of my ancient European ancestors and become a Pagan. I suppose some of you already consider me one, but I think that there must be more to paganism than just mere hedonism. Could someone give me some tips? eNtRopY

Complexifying su(2) to get sl(2,C)---group thread footnote On the group thread midterm exam (which we never had to take!) it says what is the LA of the matrix group SL(2, C) and the answer is the TRACE ZERO 2x2 matrices. So that is what sl(2,C) is. When you exponentiate one of the little...

C will stand for the complexnumbers Let V be a vectorspace over the reals. V x V is the cartesian product, the set of ordered pairs (u,v) We can turn that into a vectorspace over the complexnumbers in what I guess is an obvious or at least very natural way which I'll spell out just for...

getting started in good order is difficult---reminds me of trying to furl sail in a high wind: there is a lot of subject-matter and it keeps flapping and getting out of hand----need to tie things down bit by bit The two Ashtekar-Lewandowski 1994 papers seem to be basic in fact Sahlmann...

Magnetic Monopoly Suppose you bent a long thin magnet around to make a closed loop. All the magnetic field would be contained in the body of the loop but outside the loop you would have a vector potential circulating around the body of the loop. The vector potential can circulate because the...

the "How Do You Pronounce... " thread I'll start it off... "ether" is it "ee thur" or "eh thur"? ----- answer a question and/or put up your own word that you're not sure how to pronounce