Talk:Vacuum
|
|
| Contents |
Units
Shouldn't we put the SI Pa units first instead of torrs first? Samw
- I have just done this. With all due respect to Evangelista Torricelli, I would prefer to rid the page of the references to the torr. I feel that all that is needed is a statement explaining that the torr may be used to measure the pressure within a vacuum. AlexanderWinston 01:07, 2004 Aug 18 (UTC)
- Actually, I have gone ahead with this plan already. There is clearly not much active communication on this talk page, so I decided to be bold! AlexanderWinston 01:27, 2004 Aug 18 (UTC)
- *shrug* Suit yourself. -- Tim Starling 02:43 May 7, 2003 (UTC)
Someone deleted all reference to the Torr. The SI crusade has gone too far in this case. It is difficult to find vacuum equipment specified in Pascals; the Torr is the de facto standard. If a reader is going to an encyclopedia article to learn about vacuum, it would probably be useful for her or him to know what a Torr is and how to convert it to Pascals. I put it back in. Yannick Trottier June 4, 2005
Vacuum in Space
My note about fecal matter in low earth orbit is bizzare enough that it really should have a reference. To my embarrassment, I can't find it, but I'm still sure I read this in one of the Long Duration Exposure Facility (LDEF) studies. Does anybody have relevant conference proceedings?
Historical interpretation
The article mentions one William Burley, about whom I'm not able to find anything. It seems to me that Walter Burley (http://plato.stanford.edu/entries/burley/) is meant. However, Walter Burley lived 1275-1344 while Bishop Tempier condemned his 219 propositions in 1277 (thanks, ALoan). That would make the article's historical order wrong. More research is clearly needed.
—Herbee 20:24, 14 Feb 2005 (UTC)
- Hmm - perhaps is was Walter Burley - I'll have to check my notes. And I wasn't professing to have put things in strict date order, but it is gratifying that they are roughly contemporary. -- ALoan (Talk) 05:26, 18 Feb 2005 (UTC)
Comments
Oops! In the edit summary field for the article I really meant 'avoid redirect', not disambig of course. Andrewa 18:09, 18 Mar 2004 (UTC)
While the cosmological constant figures prominently in some theories, I think it fair to say that it has not actually been observed in nature, despite recent developments and hopes. Guest 03-26-2005.
Requests
If anyone has any pointers on the following
- perfect vacuum, aka free-space and what energy and circumstance is provably required to create such a state of matter-free space
it would be nice to have it included in this article. Thanks so much!
Other possible topics or references to add to this article
-pumps in series vs. parallel, explanation of compression ratio and backing pressure
-vacuum measurement
-uses of vacuum - semiconductors, food packaging, adhesive preparation
-particle gas dynamics, i.e. fluid dynamics for vacuums
-effects of exposure to vacuum, on humans, plants, etc.
-the Crookes radiometer, and why it reverses with pressure and temperature
--Yannick 03:46, 6 Jun 2005 (UTC)