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BlankIsBeautiful posted:I have a gallon of 50% H202 in my freezer, and can confirm that, even at its relatively low concentration, it will burn you just like any acid. I use it to clean metal parts of any organic matter. 90% H202, which is what's normally used as rocket oxidizer/fuel must be horrifying to work with. poo poo dude 50? We don't go above 30% in my little world of computer hardware manufacturing.
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May 8, 2018 05:10
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And buying 50% probably gets you put on a list. https://www.youtube.com/watch?v=yRslJ6-ut4k Phanatic fucked around with this message at 15:48 on May 8, 2018 |
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May 8, 2018 05:25
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theflyingexecutive posted:Writeup for the safety party I helped throw: http://gothamist.com/2018/05/07/safety_fest_photos_2018.php#photo-1 Dang that looks like legit awesome fun
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May 8, 2018 06:33
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https://i.imgur.com/IW6r47V.mp4
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May 8, 2018 13:05
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Mustached Demon posted:poo poo dude 50? We don't go above 30% in my little world of computer hardware manufacturing. Phanatic posted:And buying 50% probably gets you put on a list. I had a research lab chemist order it for me. A couple of years ago, I was looking at building a biprop rocket engine that utilized 50% HTP and gasoline. http://home.total.net/launch/ I never got the time to do it, so I was stuck with the H202. As I said, it's a marvelous cleaner for things if you want to remove all traces of organic material. 50% HTP is a far better carburetor cleaner than anything else on the market.
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May 8, 2018 13:14
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EoRaptor posted:Chlorine Triflouride would like to have a word with you. It's outside, on the giant pile of burning asbestos. They managed to synthesize chlorine pentafloride, which will do interesting things, like florinate gold, and occasionally the Nobel gasses. From a purely analytic chemistry standpoint, it was the best possible oxidizer. The downside, the huge quantity of hilarious fluorinated RP1 exhaust put a bit of a damper on it. IPCRESS posted:What if my degreasing procedure is to hose stuff down with LOX? Brought to you by the same lads who decided using a lighter to check inside the used gasoline tanker cars was a bright idea. BlankIsBeautiful posted:I have a gallon of 50% H202 in my freezer, and can confirm that, even at its relatively low concentration, it will burn you just like any acid. I use it to clean metal parts of any organic matter. 90% H202, which is what's normally used as rocket oxidizer/fuel must be horrifying to work with. H2O2 is great because it can readily catalyze itself into O2 and 700C steam, catalysts include fire retardant clothing, humans, asphalt, and most forms of greases and oils. It also has a very strong bleaching effect. One of these days someone is gonna convince the smarter ever day dude, or the high speed camera guys to play around with bits of meat and 90% H2O2, and it'll be glorious.
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May 8, 2018 13:15
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Methylethylaldehyde posted:Nobel gasses. noble Because they're snobs and won't react
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May 8, 2018 13:20
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Methylethylaldehyde posted:H2O2 is great because it can readily catalyze itself into O2 and 700C steam, catalysts include fire retardant clothing, humans, asphalt, and most forms of greases and oils. It also has a very strong bleaching effect. One of these days someone is gonna convince the smarter ever day dude, or the high speed camera guys to play around with bits of meat and 90% H2O2, and it'll be glorious. Yep. I treat the 50% H202 as if it were Aqua Regia. It can turn nasty on you really fast.
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May 8, 2018 13:26
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GotLag posted:noble I am irate, irate I tell you, that autocorrect has led me astray once more! BlankIsBeautiful posted:Yep. I treat the 50% H202 as if it were Aqua Regia. It can turn nasty on you really fast. It's ability to foam up almost instantly to 50x it's original volume is always an eye opener to see in person. Methylethylaldehyde fucked around with this message at 13:30 on May 8, 2018 |
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May 8, 2018 13:27
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IPCRESS posted:What if my degreasing procedure is to hose stuff down with LOX? Not a fan of the fishy smell it leaves.
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May 8, 2018 15:05
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chitoryu12 posted:Not a fan of the fishy smell it leaves. 
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May 8, 2018 15:27
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chitoryu12 posted:Not a fan of the fishy smell it leaves.
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May 8, 2018 15:28
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Bah, it's sped up. At normal speed it's fine.
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May 8, 2018 15:43
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Waiting for the bus in Alaska?
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May 8, 2018 16:42
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Bunni-kat posted:Bah, it's sped up. At normal speed it's fine. https://www.youtube.com/watch?v=QzG3JXzjILE
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May 8, 2018 16:49
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"I'll pick you up but I'm late already, I'm just gonna cruise by."
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May 8, 2018 16:55
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May 8, 2018 17:10
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Just guessing, but based on the design of the grate, I expect that is an underground utility vault of some sort, not a storm drain.
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May 8, 2018 17:17
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I swear to god the upper part of the image looks like it's moving. drat these eyes.
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May 8, 2018 18:57
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https://www.youtube.com/watch?v=rK8UIGkzsf8
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May 8, 2018 19:04
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Methylethylaldehyde posted:They managed to synthesize chlorine pentafloride, which will do interesting things, like florinate gold, and occasionally the Nobel gasses. From a purely analytic chemistry standpoint, it was the best possible oxidizer. The downside, the huge quantity of hilarious fluorinated RP1 exhaust put a bit of a damper on it. New jersey has a fact sheet on it here. Supposedly its used in pulp bleaching. Why do I not believe em? I'm fairly sure it won't just bleach the pulp, but also cause a strongly exothermic reaction.
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May 8, 2018 19:55
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Ak Gara posted:Just once in my life I want to see what a nuclear salt rocket would look like in real life. You know, 2 subcritical liquid radioactive salt tanks pumped into a single chamber, causing a continuous sustained nuclear explosion. https://en.wikipedia.org/wiki/Nuclear_salt-water_rocket The design and calculations discussed above are using 20 percent enriched Uranium salts, however, it would be plausible to use another design which would be capable of achieving much higher exhaust velocities (4,700 km/s) and use 2,700 tonnes of highly enriched uranium salts in water to propel a 300 tonne spacecraft up to 3.6% of the speed of light.
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May 8, 2018 20:29
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The Locator posted:Just guessing, but based on the design of the grate, I expect that is an underground utility vault of some sort, not a storm drain. Why on earth would they top it with a grate instead of something solid?
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May 8, 2018 20:33
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Jerry Cotton posted:Why on earth would they top it with a grate instead of something solid? 
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May 8, 2018 20:34
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Mr. Apollo posted:Ventilation? You are correct. Underground transformers for example, generate a lot of heat, so they can't really stick them in a small space without ventilation. The vault would have some sort of drainage built in. If it was a telecom/cable type vault it would likely have a solid cover, but they aren't waterproof either and in heavy rain would fill with water anyway, so the type of cover doesn't really matter except for keeping people from dropping stupid crap into it like it's a trash can. Based purely upon that picture, that cover is a split cover with hinges on either side (meaning it's designed to allow regular access), whereas a storm drain would have a solid cover that was bolted down with no hinges.
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May 8, 2018 21:22
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I've seen several storm drains bump up above ground level (and thus become useless), the process is along the lines of "the soft dirt of the surrounding area erodes/sinks, the concrete/steel drain doesn't"
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May 8, 2018 21:37
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thanks to https://m.youtube.com/watch?v=4Rx57jVGfso i know he's boarding incorrectly  (also the fact that the entire platform accidentally scoots back and forth a couple times while he's on the end and you can see him wobble to keep his balance is pretty  in and of itself)
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May 8, 2018 22:06
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BlankIsBeautiful posted:I never got the time to do it, so I was stuck with the H202. As I said, it's a marvelous cleaner for things if you want to remove all traces of organic material. 50% HTP is a far better carburetor cleaner than anything else on the market. BlankIsBeautiful posted:Yep. I treat the 50% H202 as if it were Aqua Regia. It can turn nasty on you really fast. In what year did you learn to type? I am legitimately curious.
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May 8, 2018 23:37
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Evilreaver posted:I've seen several storm drains bump up above ground level (and thus become useless), the process is along the lines of "the soft dirt of the surrounding area erodes/sinks, the concrete/steel drain doesn't" I worked a few times at a grocery store meat department where the drain was raised like that, the foundation had settled some over the years but the pipe somehow didn't. It was a pain in the rear end squeegeeing the water up a little incline into the drain after cleaning up.
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May 8, 2018 23:45
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Nope.
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May 8, 2018 23:45
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CannonFodder posted:I worked a few times at a grocery store meat department where the drain was raised like that, the foundation had settled some over the years but the pipe somehow didn't. It was a pain in the rear end squeegeeing the water up a little incline into the drain after cleaning up. That happens a lot with poured concrete floors. Unless you plan for some settling, the drain ends up the highest point on the floor.
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May 8, 2018 23:46
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Say Nothing posted:Nope. Is that rated for 3 people? How?
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May 8, 2018 23:58
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One in each corner?
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May 9, 2018 00:07
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Ok what drat tags do you use to post this poo poo? I had a webm that I uploaded to imgur and got a mp4 link but it doesn't matter if I make it a [url] [img] or [video] poo poo doesn't play. I'm too old for this new-fangled internet apparently.
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May 9, 2018 00:13
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Groda posted:In what year did you learn to type? I am legitimately curious. Yeah, I just noticed that those were zeros, too. I have no idea why I did that. Hey what can I say it was before I had my coffee this morning. To answer your question though, I'm pretty sure it was 8th grade. 1977. Yeah, I'm 
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May 9, 2018 00:15
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ChesterJT posted:Ok what drat tags do you use to post this poo poo? I had a webm that I uploaded to imgur and got a mp4 link but it doesn't matter if I make it a [url] [img] or [video] poo poo doesn't play. I'm too old for this new-fangled internet apparently.  don't tag anything and make sure Automatically parse URL is checked below your post and lowtax will do it for you
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May 9, 2018 00:17
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Dillbag posted:
https://i.imgur.com/OXzvZEY.mp4 Thanks stranger! And thank you cripple Lowtax for your magic internet! I don't know how old this is but I applaud his grip.
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May 9, 2018 00:20
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Yeah that video of the pilot getting onto the ship is clearly something they do all the time, but considering the consequences for loving up I thought it was pretty thread-appropriate. New Civil Defense map from the Leilani Estates from about 15 minutes ago, so 2pm Tuesday local time.  Fissures 11, 12, 13 and 14 are new. 13 and 14 being new has put paid to the thought that the fissure track would move southwest and that would mean the early fissures to the north would close up. It could also mean that the people in the northeast section of the Estates between Pohoiki Road and Hinalo Street are going to lose their houses as well 
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May 9, 2018 01:22
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Ursine Catastrophe posted:(also the fact that the entire platform accidentally scoots back and forth a couple times while he's on the end and you can see him wobble to keep his balance is pretty They're scooting it around intentionally, not accidentally. That "wobble" is him using his body to slide it closer, and then further away, from the side of the ship. You can scoot a run around on an uncarpeted floor like that. Or scoot an office chair around without putting your feet on the ground.
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May 9, 2018 03:29
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MisterOblivious posted:They're scooting it around intentionally, not accidentally. That "wobble" is him using his body to slide it closer, and then further away, from the side of the ship. alright that's slightly less stonkworthy it just looked like the guy holding it in place wasn't doing a very good job of it
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May 9, 2018 03:47
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