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As a guy that watched the abyss one time I
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Aug 31, 2016 21:57
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haveblue posted:What if the divers had parachutes? On the suits, the helmets, or the air hose?
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Aug 31, 2016 22:02
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General Bullshit v.666: Death comes to us all › OSHA : Under Pressure
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Aug 31, 2016 22:09
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Wasn't there an accident on an oil rig where there were divers in a pressure chamber and they got blown apart from decompression? I mean literally blown apart, like the bodies were in many different pieces.
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Aug 31, 2016 22:10
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Yeah the body parts even got sucked through a keyhole or something
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Aug 31, 2016 22:12
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All because some dude didn't leave a note
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Aug 31, 2016 22:12
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You can't fool me that's dad's buddy who's already blown apart, always teaching us lessons.
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Aug 31, 2016 22:15
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Three-Phase posted:Wasn't there an accident on an oil rig where there were divers in a pressure chamber and they got blown apart from decompression? I mean literally blown apart, like the bodies were in many different pieces. https://en.wikipedia.org/wiki/Byford_Dolphin 9 atmospheres to 1 in a fraction of a second.
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Aug 31, 2016 22:49
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When you restrict the hose a bit, you actually let the end reach the pressure of the source. Once you reach that point, making the hole smaller does not increase how far the water shoots. It just gives you a smaller jet without concentrating the power. A drop in pressure is what causes the effects you're thinking of. If you have a reliable source of pressure, like a hydraulic tank or ocean, a big hole and a small hole will shoot out at the same speed, with total force proportional to the size of the hole. And if that's not enough, I give up. No more effort posting from me.
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Aug 31, 2016 22:58
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What if the helmet was on a treadmill?
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Aug 31, 2016 23:43
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is the suit load bearing?
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Aug 31, 2016 23:45
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Wall Balls posted:is the suit load bearing? The helmet is.
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Sep 1, 2016 00:12
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DocCynical posted:https://en.wikipedia.org/wiki/Byford_Dolphin And people thought the bends/caisson disease was bad. There's your real-world proof for the "tube of toothpaste" analogy. As for the gas leak from a few pages back, natural gas usually doesn't* actually smell bad, the stink (a chemical in the same family -- mercaptans -- as the active ingredients in skunk butts, in case you were wondering) is added artificially, because of a little thing that happened just down the road from my hometown in 1937, killing about 300 kids and faculty (295 known deaths, but it's hard to know for sure, because the bodies were ... fragmentary at best, and a lot of the kids were from migrant roughneck families and weren't on the official rosters, and either the parents didn't report that they were short a kid or six, or Mom and Dad were at the PTA meeting and the entire family was vaporized, leaving nobody to report them missing). The entire damned building leaped off its foundations, that's an eyewitness descriptor more associated with magazine detonations in battleships (see USS Arizona, for one), not land-based architecture -- a proper building explosion it's either a lovely house blown into confetti or a big building that just collapses, to make a brick schoolhouse jump, that was a lot of boom. Also, amusing history fact: The Chancellor of Germany sent his condolences via telegram. You know it's bad when ADOLF "MR. GENOCIDE" HITLER sends a telegram saying "sorry for your loss." *sometimes it does naturally have the active component of rotten eggs in it, leading to fun signs like this in low-lying areas: 
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Sep 1, 2016 00:54
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Bad Angus! Bad!
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Dylan16807 posted:When you restrict the hose a bit, you actually let the end reach the pressure of the source. Once you reach that point, making the hole smaller does not increase how far the water shoots. It just gives you a smaller jet without concentrating the power. A drop in pressure is what causes the effects you're thinking of. If you have a reliable source of pressure, like a hydraulic tank or ocean, a big hole and a small hole will shoot out at the same speed, with total force proportional to the size of the hole. This is laughably wrong, unless I'm misunderstanding you. Velocity increases as the hole gets smaller, if you refer to the Bernoulli equation or w/e.
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Sep 1, 2016 01:39
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toplitzin posted:What if the divers are on a treadmill? what if the divers are in an airplane with a parachute, on a treadmill
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Sep 1, 2016 01:50
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what if they are holy? 
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Sep 1, 2016 01:51
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Humbug Scoolbus posted:What if the helmet was on a treadmill? Does the treadmill have a parachute?
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Sep 1, 2016 01:58
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0.99999999 atmospheres equals 1.
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Sep 1, 2016 02:03
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Oh, God, guys, please, I love reading this thread for actual OSHA stuff, at the end of my day -- please don't kill it 
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Sep 1, 2016 02:10
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Can we have some more posts on the nuances of water pressure? I don't think we've had enough.
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Sep 1, 2016 02:14
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mustard_tiger posted:Can we have some more posts on the nuances of water pressure? I don't think we've had enough. Your mudders udders have 60 psi
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Sep 1, 2016 02:15
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https://www.youtube.com/watch?v=Q8q3DZB_l6M The handheld device is a disaster waiting to happen. 
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Sep 1, 2016 02:19
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SneakyFrog posted:what if they are holy? then they'll have some leaks, and the heavy squeeze they get will give a new meaning to the term "head bang" 
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Sep 1, 2016 02:23
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Dead Cosmonaut posted:https://www.youtube.com/watch?v=Q8q3DZB_l6M YES YES YES PLEASE (SANTA)
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Sep 1, 2016 02:36
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As the guiltiest party I'll submit my peace offering in the form of something that was quickly glossed over in the Louisiana flood thread. Because all the rain in the world wasn't enough, one of the local chemical plants had a sulfuric acid leak. All the roads to and from the cluster of chemical plants are underwater so of course a tank of acid is going to leak. But wait, how was sulfuric acid motive in a cloud form? Well that facility makes some ungodly fraction of the total consumption of HF in the US. So I'm assuming they are calling oleum sulfuric acid because who the hell has ever heard of oleum, and acid clouds gets the point across.
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Sep 1, 2016 02:37
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I'm the guy holding a vacuum hose in front of a 1000W laser.
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Sep 1, 2016 02:37
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zedprime posted:As the guiltiest party I'll submit my peace offering in the form of something that was quickly glossed over in the Louisiana flood thread. Because all the rain in the world wasn't enough, one of the local chemical plants had a sulfuric acid leak. All the roads to and from the cluster of chemical plants are underwater so of course a tank of acid is going to leak. Oleum is sulfuric acid with excess sulfur trioxide dissolved in it. The vapor cloud is the SO3 evaporating out of it. The SO3 vapor will dissolve in water to make more sulfuric acid.
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Sep 1, 2016 02:41
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Dead Cosmonaut posted:https://www.youtube.com/watch?v=Q8q3DZB_l6M Would that thing reflect off shiny metal and burn the ceiling? Or is that effect limited by focus distance? Haha, they have that thing in squeaky too. https://www.youtube.com/watch?v=WcvcEg0xGYY Mithaldu fucked around with this message at 02:46 on Sep 1, 2016 |
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Sep 1, 2016 02:43
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Dead Cosmonaut posted:https://www.youtube.com/watch?v=Q8q3DZB_l6M the noise it makes is well worth a few fingnats
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Sep 1, 2016 02:48
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Dead Cosmonaut posted:https://www.youtube.com/watch?v=Q8q3DZB_l6M The handheld device is RAD AS HELL!
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Sep 1, 2016 03:04
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Dead Cosmonaut posted:https://www.youtube.com/watch?v=Q8q3DZB_l6M I have so many questions, like... where can I borrow one from?
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Sep 1, 2016 03:23
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Sep 1, 2016 03:25
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Ball size in inversely proportional to brain size.
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Sep 1, 2016 04:11
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My 70 year old father used to do dumb poo poo like this on the reg, my entire family is amazed he hasn't accidentally killed himself ten times over by now. A few year ago he was trimming a big thick tree branch by balancing on top of a rickety wooden ladder and reaching wayyyyy out with a circular saw when he finally lost balance and fell. Somehow he escaped serious injury but he seemed to get the message and he's cut way back on the dumb stunts since then. He also got his revenge on the tree when a bunch of 'amateur-enthusiast arborists' were going door to door offering to do odd jobs for cash and he paid them a couple hundred bucks to cut the tree down. It must have been a pretty funny sight with these huge Samoan guys going "Got any trees you want cut down?" and my tiny elderly father going "MU HA HA HA come this way!"
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Sep 1, 2016 04:26
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Mithaldu posted:Would that thing reflect off shiny metal and burn the ceiling? Or is that effect limited by focus distance? I might be completely talking absolute garbage but I read up on this and they said that it only does its job on stuff that absorbs the laser. Like rust or paint or whatever.
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Sep 1, 2016 05:34
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https://www.youtube.com/watch?v=3V-1BL1Tr90
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Sep 1, 2016 05:58
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Pingiivi posted:I might be completely talking absolute garbage but I read up on this and they said that it only does its job on stuff that absorbs the laser. Like rust or paint or whatever. The question is "what happens if you're stripping paint off a mirrorlike surface". My guess is that it would be fine (with eyepro) on rough or pitted surfaces, but I see things ending super badly if you're stripping a polished surface.
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Sep 1, 2016 06:03
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Sep 1, 2016 06:04
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IPCRESS posted:The question is "what happens if you're stripping paint off a mirrorlike surface". Now you have me wondering what kind of insane eye protection you need for a kilowatt laser.
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Sep 1, 2016 07:14
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Powered Descent posted:Now you have me wondering what kind of insane eye protection you need for a kilowatt laser. I think those are CO2 LASERS, with wavelength 10 600 µm, which is so far from visible light that it’s not hard to make very effective filters. The bigger concern might be the emissions from the plasma.
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Sep 1, 2016 07:36
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