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Homemade Hydrometers
[rquote=648537&tid=156495&author=yobbo II] Two decimal places of accuracy is sufficient.
... |
11-11-2020 at 17:40
by: Twospoons |
Covid vaccine results
[rquote=648836&tid=156509&author=macckone]
The myth that young people do not get ill is dan ... |
11-11-2020 at 13:27
by: Twospoons |
Covid vaccine results
The -70C storage temperature is a bit of a stumbling block though. Its going to make large scale dis ... |
10-11-2020 at 17:47
by: Twospoons |
Sulfuric Acid in NZ V2
There's no sulfuric acid drain cleaner sold in NZ. There are several chemical supply companies you ... |
8-11-2020 at 13:26
by: Twospoons |
Bad luck or what?
I recall sitting in a aircraft at Sydney Airport looking out the window, watching a baggage handler ... |
3-11-2020 at 15:11
by: Twospoons |
No one will give me experience, so I will make experience myself, starting from the bottom
I think OldNubbins has it dead right.
Stick to thanking them for the opportunity, politely ask for ... |
3-11-2020 at 12:54
by: Twospoons |
DIY Pirani vacuum pressure gauge electronics
I've always wanted to build a pirani or thermistor gauge, but I'm a little stumped by the calibratio ... |
28-10-2020 at 13:13
by: Twospoons |
No one will give me experience, so I will make experience myself, starting from the bottom
[rquote=646544&tid=156331&author=Cou]
If no one is gonna give me experience, I'm making it ... |
15-10-2020 at 11:31
by: Twospoons |
EMP device for pesky drones
https://www.up.ac.za/media/shared/Legacy/sitefiles/file/44/1026/2163/8121/electromagnetichornswithel ... |
8-10-2020 at 15:05
by: Twospoons |
Are Flamin' Hot Cheetos really that bad?
The artificial colours are probably the worst. I had a colleague who was allergic to at least one of ... |
5-10-2020 at 21:29
by: Twospoons |
EMP device for pesky drones
I'd be worried about the birds being injured by the prop blades. Seems rather unethical to me.
Mayb ... |
5-10-2020 at 14:36
by: Twospoons |
EMP device for pesky drones
I thought about this as a way to silence my neighbor's stereo late at night.
I would be inclined to ... |
5-10-2020 at 12:44
by: Twospoons |
YOUR inventory against Covid - Chemicals & Hardware only
I already had a large container of isopropanol before this mess - wifey was buying tiny 100ml bottl ... |
1-10-2020 at 21:54
by: Twospoons |
how to get the maximum heat of a wood stove?
If there's all this combustible stuff going up the chimney, then that's a waste. How do we get that ... |
30-9-2020 at 12:33
by: Twospoons |
Hydrogen production for Al + Na/KOH + H2O - what is the best method for control?
3rd method: have your Al in one solid piece that can be lowered into your NaOH as needed. Or flip th ... |
26-9-2020 at 13:05
by: Twospoons |
I finally won a cheap difussion pump
I keep looking longingly at all the diff pumps on ebay - but the shipping to my country is always ho ... |
7-9-2020 at 22:10
by: Twospoons |
What does it take to make liquid oxygen from air using compression?
[rquote=643602&tid=156012&author=wg48temp9]
I suspect the difficulty must be in constructin ... |
24-8-2020 at 12:55
by: Twospoons |
What does it take to make liquid oxygen from air using compression?
The Linde process uses regenerative cooling, so you dont need -118C . What is important is the [url ... |
15-8-2020 at 21:00
by: Twospoons |
What does it take to make liquid oxygen from air using compression?
[rquote=642953&tid=156012&author=Junk_Enginerd]W
Edit: Actually, I see a very optimal sol ... |
14-8-2020 at 18:59
by: Twospoons |
What does it take to make liquid oxygen from air using compression?
[rquote=642870&tid=156012&author=Junk_Enginerd] Since it is continuously operated it also se ... |
12-8-2020 at 14:50
by: Twospoons |
Purifying ammonium sulfate fert
I think you'll find its some kind of anti-caking agent deliberately added after prilling. |
31-7-2020 at 16:30
by: Twospoons |
SmCo stir bars worth it?
Alnico is more easily demagnetised than SmCo, but is therefore also more easily remagnetised. A coil ... |
30-7-2020 at 02:36
by: Twospoons |
How to grow crystals & Why do they form?
No pressure isn't a requirement, at least for most ionic salts. The idea is to create a thermal gra ... |
4-7-2020 at 18:16
by: Twospoons |
How to grow crystals & Why do they form?
Another method: [url=https://www.sciencemadness.org/whisper/viewthread.php?tid=78669#pid499255]Hydro ... |
4-7-2020 at 14:09
by: Twospoons |
how to predict performance of a propellant in relation to another propellant
Have you considered trying something like Propep? Its used to estimate rocket propellant performance ... |
28-6-2020 at 14:18
by: Twospoons |
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