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Girls! The initial choice is totally irrelevant, as one empty box will always be removed. This leaves two ... |
2-12-2004 at 13:45 by: Twospoons |
castable refractory mixtures Voids in the cement are usually created by adding a combustible material like sawdust, then burning ... |
30-11-2004 at 13:11 by: Twospoons |
Girls! I love it when my daughter comes to me and asks if we can do a 'science experiment'. At w ... |
17-11-2004 at 17:06 by: Twospoons |
Explosive chambers With Al you also have the issue of Al reacting with the water.
You could also try an oil quench ... |
9-11-2004 at 18:25 by: Twospoons |
Explosive chambers The risk of a steam explosion is probably not as great as you might think. I have poured 1/2 kg mol ... |
9-11-2004 at 15:07 by: Twospoons |
More on PbO2 electrodes I was referring to the plating process, rather than chlorate production, though if you read through ... |
1-11-2004 at 16:09 by: Twospoons |
More on PbO2 electrodes [quote]
Oxydro, I highly doubt any sort of rxn - remeber that Pb is more electropositive than Cu ... |
1-11-2004 at 14:07 by: Twospoons |
Carbon arc Furnace Parallel diode arrays work better if the diodes are in close thermal contact. As diodes heat up the ... |
21-10-2004 at 17:15 by: Twospoons |
Coppercondensor again... Typical 2-part epoxy glue turns to jelly aroung 60-70 C, but regains its hardness on cooling.
Epo ... |
20-10-2004 at 19:17 by: Twospoons |
Carbon arc Furnace Simplicity. Robustness.
I like it! |
20-10-2004 at 13:58 by: Twospoons |
Salt Bridges, A simplification? "Polyacrylamide" is what is written on the side of the container of water storing granules ... |
20-10-2004 at 13:52 by: Twospoons |
Salt Bridges, A simplification? Funny, the agar idea occured to me the other day too. Though I had thought of making it into a memb ... |
19-10-2004 at 19:35 by: Twospoons |
More on PbO2 electrodes Terracotta is a nice porous ceramic. Maybe pieces of terracotta plant pot might work. |
7-10-2004 at 19:46 by: Twospoons |
PCB etching with ferric chloride 1. Air bubbles are for agitation only, because this is simple, and gentle. I have never used air bu ... |
29-9-2004 at 16:38 by: Twospoons |
Darwin's Black Box I always find it hysterically funny when people find something "so amazing it can't have o ... |
22-9-2004 at 20:34 by: Twospoons |
Rocketry More accurately, the centre of pressure (CP) should be aft of the Cg. Cp is an aerodynamic function ... |
22-9-2004 at 18:26 by: Twospoons |
Crucibles and Metalcasting Its possible it was [i]all[/i] carbonate. Did it say 'lime' (the carbonate) or 'slak ... |
16-9-2004 at 14:16 by: Twospoons |
Solvent explosions, exaggerated danger. Diethyl ether is particularly bad as the explosion limts cover such a huge range of concentrations - ... |
16-9-2004 at 13:59 by: Twospoons |
Solvent explosions, exaggerated danger. Your calculation is way off.
Rough calcs give me 22l of acetone vapour from 74cc of liquid aceton ... |
15-9-2004 at 18:23 by: Twospoons |
Crucibles and Metalcasting You're right, bugger it! Should have checked my references first. Did find one addtional note ... |
13-9-2004 at 21:59 by: Twospoons |
Crucibles and Metalcasting Use 'ball clay' instead of bentonite, if you want to increase the plasticity of your mix. ... |
13-9-2004 at 13:55 by: Twospoons |
PCB etching with ferric chloride I'd suggest also contacting one or two PCB manufacturers, since they're the ones who actua ... |
8-9-2004 at 14:07 by: Twospoons |
PCB etching with ferric chloride John, neither of those links appear to pertain to the discussion at hand. One is a recycler - deali ... |
7-9-2004 at 19:06 by: Twospoons |
Crucibles and Metalcasting Bloody brilliant find Bromic! I just examined the patent, and it looks as though all thats needed i ... |
7-9-2004 at 14:18 by: Twospoons |
PCB etching with ferric chloride I used to make up my FeCl3 solution from the solid hexahydrate. No added acids, no precipitates, an ... |
6-9-2004 at 23:20 by: Twospoons |
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