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repel animals with sound
Bears and cats are, of course, different things. Recently I spent a few days walking in an area popu ...
3-12-2008 at 08:52
by: Geomancer
Iron bar bending force (physics question)
[NB: I started writing this last evening, before many of the posts now present were made. Those post ...
15-6-2008 at 07:15
by: Geomancer
Mathematical solution to two quadratics
@len1: You impugned my integrity multiple times over the course of two posts before I chose to write ...
8-5-2008 at 16:44
by: Geomancer
Mathematical solution to two quadratics
*Sigh* A personal attack? Really? I stand by the quality of my posts, both in general and in regards ...
8-5-2008 at 10:12
by: Geomancer
Mathematical solution to two quadratics
No need to take offense. My point was that the term "greater than" is difficult to interpret. The si ...
8-5-2008 at 06:08
by: Geomancer
Mathematical solution to two quadratics
Careful there, len1. The (Galois) symmetry group associated to most quintics is qualitatively differ ...
7-5-2008 at 15:59
by: Geomancer
ENTRAPMENT
Strange I come out of hiding for this. As a US citizen, what you propose runs completely against all ...
5-5-2008 at 07:03
by: Geomancer
math help
A summary of DerAlte's method for those so inclined:
The equation [b]x<sup>t</sup>Ax+b& ...
4-2-2008 at 08:42
by: Geomancer
acetylsalicylic acid
Salicylic acid readily complexes Iron(III), forming an intensely purple complex. The color is strong ...
22-12-2007 at 09:02
by: Geomancer
Wine recommendations?
I don't know where you live, but in much of the world (most US states, for example) there is a sizab ...
22-12-2007 at 08:50
by: Geomancer
math help
[quote][i]Originally posted by woelen[/i]
Yes, there is a division operator, but a left and a right ...
15-11-2007 at 19:27
by: Geomancer
math help
If you're working with a division algebra over a finite field, it must be infinite dimensional, no? ...
15-11-2007 at 08:39
by: Geomancer
Rocket Fuel
<p>You seem to have a rather poor understanding of how rockets work. Of the propellants you me ...
30-6-2007 at 16:06
by: Geomancer
Learning mathematics from a book?
Which mathematics? The last people to know all of the mathematics of their day are generally thought ...
22-7-2006 at 15:38
by: Geomancer
Insect identification request
It sure looks like a mite. I don't know the exact features used to distinguish spiders and mites, bu ...
8-5-2006 at 16:24
by: Geomancer
Juglone
[b]Or: 5-hydroxy naphthoquinone[/b]
[b]Or: A novel method for the purification of commercial xylene ...
24-10-2005 at 19:59
by: Geomancer
Aerosol BLEVE Bomb
From what I recall BLEVE are actually rather interesting. Superheated liquid is an energetic materia ...
27-6-2005 at 16:29
by: Geomancer
Is chemical education being cramped by current safety regulations?
No (to a first approximation). I think it's more a result of the changing role of chemical educ ...
27-6-2005 at 15:32
by: Geomancer
Rubber stopper and a weird story
[quote][i]Originally posted by Darkblade48[/i]
If rubber shrinks when heated while the glass expand ...
20-6-2005 at 17:00
by: Geomancer
Rubber stopper and a weird story
Invert the flask in a tank of water and manipulate it so that it contains a little bit of water and ...
19-6-2005 at 09:50
by: Geomancer
Measuring pressure a la Pirani's Vacuum Meter
That's an impressive bit of glassblowing. [i]Scientific American[/i] had a column describing a ...
24-3-2005 at 19:09
by: Geomancer
The future, and oil
Hmm... so many interesting things to talk about. I think we can't actually afford to burn even ...
24-3-2005 at 18:51
by: Geomancer
Diphoronepentaperoxide (DPPP)
What intrigues [i]me[/i] about this proposal is that it looks so unlikely. Normally when crackpots c ...
16-2-2005 at 18:02
by: Geomancer
heat tape
Why won't steel work for low temperature stuff?

I'd forget about the toaster wire. ...
16-2-2005 at 16:59
by: Geomancer
Nicotine Extraction and purification
I see you've already checked usenet, so I won't regurgitate what I read there. The zinc ch ...
16-2-2005 at 16:51
by: Geomancer
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