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how would it change if world population went to 500m?
World pop was ~500 million around 1600AD. So theres some clues there. Of course we have a lot more k ... |
16-5-2021 at 02:07
by: Twospoons |
wall wart as power supply for electrolysis
TBH you'd be better off investing in a proper variable bench power supply. It will (should) be more ... |
14-5-2021 at 18:44
by: Twospoons |
Flashlight power and grow light power
I saw a paper once that suggested broadband lighting was better for plants. The study found that so ... |
2-5-2021 at 13:53
by: Twospoons |
Low resistance electrolytic cell divider
[rquote=656703&tid=157195&author=goldberg]
U-shaped tube filled with KCl solution gelled by ... |
20-3-2021 at 20:11
by: Twospoons |
Large Quartz Tubes For Cheap? - Patio Heater
See if it will pass short UV light. If it does then its quartz.
[Edited on 18-3-2021 by Twospoons] |
17-3-2021 at 16:20
by: Twospoons |
Question about pressure
If adding a stirbar is going to break the vessel, then you are already operating too close to the fa ... |
21-2-2021 at 15:25
by: Twospoons |
Most expensive mistakes you've made?
Blew up a $1000 magnetic field probe while poking around inside a power supply. Lucky for me the $25 ... |
14-2-2021 at 11:11
by: Twospoons |
How to handle powders without dusting?
[rquote=653920&tid=155805&author=Fyndium]
What are efficient methods at neutralizing static ... |
29-1-2021 at 00:36
by: Twospoons |
Sulfuric & Nitric Acid In Australia
Watch those plastic drums! The plastic "jerry can" style containers my Nitric came in developed tiny ... |
20-1-2021 at 14:00
by: Twospoons |
Low(est) boiling point salts?
copper bromide lasers are typically operated around 400C, so you could try that. |
18-1-2021 at 19:51
by: Twospoons |
magnesium aluminate refractory up to 1800C.
You will want to remove as much sodium as possible - any residue may act as a flux. |
16-1-2021 at 21:30
by: Twospoons |
Help understanding DIY discharge tube emission spectrums
Also note that silicone is quite permeable to gasses. |
13-1-2021 at 18:43
by: Twospoons |
Radiophobia?
Do you supposed they've checked for Americium based smoke detectors yet? |
11-1-2021 at 17:07
by: Twospoons |
Why is there no electronic optical pyrometer ?
Out of curiosity, was it a doped wafer you tried? Doping might degrade transmission in the mid IR.
... |
4-1-2021 at 19:09
by: Twospoons |
Why is there no electronic optical pyrometer ?
I absolutely meant silicon, not silica. Theres a reason silicon is used as a optical material for C ... |
4-1-2021 at 12:21
by: Twospoons |
Why is there no electronic optical pyrometer ?
If you make the window of your furnace peephole from silicon then your optical pyrometer should work ... |
3-1-2021 at 13:34
by: Twospoons |
Why did TNT become so universal?
[rquote=651797&tid=156784&author=Delta-R]
Was it purely a result of it’s insensitivity an ... |
21-12-2020 at 21:15
by: Twospoons |
The insanity that is OHS
Thing is its much better to let kids suffer a minor injury from such simple chems, to act as a remin ... |
11-12-2020 at 00:55
by: Twospoons |
DIY temperature probe for hotplate, help!
[rquote=650621&tid=156587&author=p4rtridg3]After testing some LM35s I got online, I can conf ... |
7-12-2020 at 14:23
by: Twospoons |
Balance repair
As long as you remember that resolution and accuracy are not the same thing. |
3-12-2020 at 01:48
by: Twospoons |
Steel wool on hot plate for even heating??
Scrunched up aluminium foil might be better. Better heat conduction than steel wool. |
30-11-2020 at 01:06
by: Twospoons |
Balance repair
That circuit looks like a slightly different sensing principle. The LED appears to be regulated by f ... |
25-11-2020 at 15:04
by: Twospoons |
DIY temperature probe for hotplate, help!
J2 looks to be a connection for a K-type thermocouple, which means the black device next to it (TO92 ... |
24-11-2020 at 19:27
by: Twospoons |
DIY temperature probe for hotplate, help!
[rquote=649685&tid=156587&author=p4rtridg3]Hello all,
Testing the official external probe ... |
23-11-2020 at 22:02
by: Twospoons |
DIY temperature probe for hotplate, help!
Check to see if theres any bias voltage coming out of the hot plate. The cold junction sensor may no ... |
23-11-2020 at 13:54
by: Twospoons |
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