jordan

Ok. That could explain why I have 178 e-mails, more than 100 of which are from SFN. Unfortunatly, I don't check e-mail ever. It's just to have for when the internet asks for an adress so they can send all the spam they want and I never have to worry. I'll take your advice and turn it off soon. Thanks

Can anyone explain to me what the subscribed threads are and how come I am automaticly subscribed to threads after I post in them? Thanks

Agreed

I thought that Einstein wasn't very good at math and that his equations were pretty simple.

Alright, simple question: Can we group irrationals, pi, i and infinity in the same group as natural numbers by the concept they represent?

Should we refine our definition to abstract concepts instead of just concepts or call the thread dead? I mean, everyone has said all numbers are concepts, but should we discuss the intent of the thread and ask if certain numbers do not fit in "normal concepts" and instead be labeled "abstract concepts" or am I misconstruing what's being said?

I still haven't seen anyone adress i or, more importantly, infinity. Mandrake, you said all numbers are concepts because they have use in daily life, but the above two are good examples of ones that don't. I don't that they can be taken as anything more than concepts.

Economic Left/Right: -0.62 Social Libertarian/Authoritarian: -1.69 Don't know exactly what this means, but I took the test once before and was more to the right on the economic scale (about a 2 I believe). I think a lot of the questions were poorly worded and had a tough time trying to decide whether to answer with what I immeadiatly thought or what I felt they were trying to hint at with the question. Schumann was a composer from the early to mid 1800's. Where did you find that, though. All it told me was I was in the same quadrant as Ghandi.

Yes indeed! Some small cup coasters make excelent frisbees and can amuse a pack of high-schoolers for hours after school ends. (Not that I was one of them or anything....) What is your favorite thing to do for relaxation on the weekends?

I noticed you didn't include infinity (or i) in your quote. My problem is that you seem to agree that infinity is not a measurable quantiny, so an irrational number (one by definition a non-repeating infinite decimal) wouldn't be measurable. They have infinite digits, and unless you explain how infinity is not a concept, but a concrete, observable, measurable quantity, I will hold that irrational numbers are concepts and not physical representations.

I agree that we have well defined concepts of irrationals and infinity, but I believe Latios was trying to say that since they can't be modeled in the realy world, they remain simply concepts. We can show that there are three of something, but I think you would have a difficult time showing there are exactly pi or i or infinity of something in our world.

It all sounds ok to me. I would agree that infinity and irrational numbers are concepts. There would be a few more to throw in there with them. Zero, though. I would say zero is not a concept and can be represented in the world. It'll be interesting to see if there is some discussion or if there is a clear answer on this one. Either way, I'll have to wait till morning to see. Oh well.

Why did you get to meet Colin Powell?

My uncle works with Air Force One and Two (or whatever the Vice President's plane is) [1] and therefore knows the President and Vice President[2]. We got to visit him a while back and watch the President board his plane from just off the runway. Lots of security.

Very true. Quite disturbing pictures. That's the biggest problem, but how to stop it is anyone's guess.

I would tend to agree with you Glider. These ideas have been ingrainded in their heads so long that is very difficult to change them. The ideas seem to be that the others are bad and peaceful negotiations aren't an option. It will take two bold leaders to change this, but then it will have to trickle down through a few generations before the idea of violence is removed from the majority of their culture.

Although a valid answer, I don't know of anyone who would want to live in a centrifuge for 30 days. You'd be quite dizzy.

Iron is the last element that a star's core can acheive. There are a few others in between' date=' but i don't remember if it is strictly doubling of the atomic number or if there are other factors. I was just wondering if it reaches each new element all at the same time or not. I know this hinges on the previous question, but do you know what elements would be in the sun at this phase? That's alright. Thanks to you and an advanced thanks to all those who post later.

The Vomit Comet!

Certainly. Gravity and acceleration are indistinguishable for us. Elvevators (fast ones) are a good example. As the floor gets pulled up under us, we feel like we are slightly heavier. For astronauts, simulation of take-off sized acceleration can be produced in a centrifuge. This is a chamber in which a human sits as it spins around faster and faster. Just like the elevator (only a much greater scale) the person finds increased difficulty in moving. This effect is measured in g's or number of times the gravity is greater than that of the earth. Space is considered to be esentialy a "zero-g" environment. Earth is 1 g and so on. Hope this helps.

I was in physics today and saw on a video a breif desription of stars forming heat throught the fussion of elements in their core. This brought about three questions. 1. Does anyone know whether the fussion in the core is balanced or sparadic? I mean, are there spots of hydrogen, some of helium, some of the next element (sorry, I don't know it off the top of my head) or does it fuse all the hydrogen, then all the helium and so on? 2. Does anyone know what state of this process the sun is in? 3. How would one be able to tell that this happens in the stars?

Cool. I like the limits idea. I does seem to make more sense, though the concept of infinity still needs to remain, I do see why it is better to say a function tends to infinity rather than is infinity. Thanks for the help.

Upon second inspection it does appear so, however, it is the "which is important" part that has me confused.

How is radioactive decay important for life?