... "[..] increasing the physical stress on the particles by just 1% can cause their flow speed to increase by a factor of a million, creating a downward...
Does anyone here know how to find the lift of a helicopter propeller? Thank you Artem ... Yahoo! for Good Click here to donate to the Hurricane Katrina relief...
Good question, let me take a wild guess... I would think you would treat each propeller much like a standard airplane wing. The lift force is then proportional...
Somewhat related to this subject i would like to make some personal observations about the learning experience in physics. As professional physicists i am...
sorry that should have been "lining boxes in black". C.B. ... From: Celal Berker Sent: 05 October 2005 10:21 To: 'undernetphysics@yahoogroups.com' Subject: RE:...
If you are in the US, or can get access to the Public Broadcasting Station, you may want to set your calendar, or your TIVO, do see this on Oct. 11: ...
... Every time Zapper posts one of his excellent "So you want to be a physicist" essays, I have thought about writing an essay of my own entitled "Why I did...
... doing ... quantum ... I've ... explanation ... boxes or ... of a ... Boltzmann ... to play ... invented ... know what ... further with ... Maybe you ... ...
... While we are celebrating this year's Nobel prizes, let's not forget that at roughly the same time, the Ig Nobel prizes for 2005 were also awarded! :) ...
OK, OK... I know. I've been slacking off on the vexers lately. I'd give you a whole lot of excuses, but I don't think anyone would want to hear them.... ... ...
This week's vexer will test your knowledge of superconductivity, or your creativity in doing a google search! :) Give just ONE example to illustrate the...
when i first read this vexer, my gut reaction guess was that you would get a spherical flame. i just did a google search and a couple of sites said this is...
Hi, The chemical reaction for burning or fire is: C + O_2 -> CO_2 + energy So in order for fire, we need oxygen. The released CO2 from the above reaction is...
Just to add, the CO2 will diffuse away from the flame very slowly (spherically in all direction), but again, this effect is too slow to allow enough oxygen to...
Why do you think the CO2 will diffuse slow? If you have oxygen all around the flame, the very hot C02 will deffuse from it's hight concentration to the low...
Hello Everybody. Back in 1999 I saw a report on TV that said that by 2004 there will be man on mars. It flew through my ears like nothing extraordinary. At...
Good Idea ... I think we should think about where to land the spaceship too... and i dont mind the game nickname:p alkhimey <alkhimey@...> wrote: Hello...
OK.. so not many people want to do a google search. :) ... One clearest example is the fact that when a diamagnet and a superconductor in a normal state is...
This is one of those puzzles that annoys the hell out of me. So, as usual, I like to pass this on to you! :) You are standing at a fork in the road. One branch...
I have been "loaded" with puzzles of this type since I was 6. But here is one that I can't slove :( "There are 3 people, one truth teller, one lair and one...
I know a solution, but you have to make a simplification for that. Here it goes... You basically have one truthful person and two liars ;)(i.e. you approximate...
Artem, you mean 3 questions that all answer or 1 question each? cause I can't see any solution with just a total of 3 questions that only one person may...
Oops, I forgot to mention one important thing: the politician is telling truth or lies randomly. This what makes this puzzle extarordinary. Thanks anyway and...
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