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Baller Witness Bro posted:15,000 liters? That's enough to fill the Helium dewar around a 9.4T magnet around 40 times... Did you mean $15,000 or are MRI dewars much larger to prolong service intervals? The first 15,000 of liquid helium was for cooling from 80K to 2.2K, on a 60ton coil, so most of it boiled off. The cryostat itself was 3,000 liters. Once we started energizing we went through almost another 15,000 liters to get it to 11.7T. The precool (Ambient to 80K) was 26,000 liters of N2, none of it retained. It's not a mouse magnet😀
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Aug 8, 2015 17:44
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Pornographic Memory posted:If the helmet itself is caught between the bus and the pavement he could be moving his head inside the helmet, but unable to move the helmet itself. Your helmet should be a fairly snug fit. If your head is rattling around loose inside of it, that kind of defeats the purpose.
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Aug 8, 2015 17:45
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Captain Postal posted:I think the question that was being asked is: why didn't the rider, you know, move their head at some point? Don't questions a man's decisions until you've been dragged a mile in his helmet.
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Aug 8, 2015 18:05
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im full of poo poo posted:Holy crap that river looks exactly like orange juice I was gonna say more like tubgirl color.
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Aug 8, 2015 19:17
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Captain Postal posted:I think the question that was being asked is: why didn't the rider, you know, move their head at some point? loving LOL
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Aug 9, 2015 00:25
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Powered Descent posted:Your helmet should be a fairly snug fit. If your head is rattling around loose inside of it, that kind of defeats the purpose. The helmet shell is probably pretty tough, but once you wear a hole in it you're now grinding styrofoam, more or less. It'll go pretty quick.
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Aug 9, 2015 00:52
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VectorSigma posted:Did some digging.  
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Aug 9, 2015 03:24
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Koryk posted:The first 15,000 of liquid helium was for cooling from 80K to 2.2K, on a 60ton coil, so most of it boiled off. The cryostat itself was 3,000 liters. Once we started energizing we went through almost another 15,000 liters to get it to 11.7T. The precool (Ambient to 80K) was 26,000 liters of N2, none of it retained. Man that is a shitload of He; aren't there concerns about a potential shortage?
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Aug 9, 2015 04:36
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Scaramouche posted:Man that is a shitload of He; aren't there concerns about a potential shortage? It's a huge concern. I linked to Pop Mech article earlier about it. EDIT: I did NOT link to it, just quoted it. Here it is: http://www.popularmechanics.com/science/health/a4046/why-is-there-a-helium-shortage-10031229/ http://www.popularmechanics.com/science/health/a8289/as-shortage-worsens-we-visit-the-federal-helium-reserve-14720528/ Proteus Jones fucked around with this message at 04:52 on Aug 9, 2015 |
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Aug 9, 2015 04:50
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flosofl posted:It's a huge concern. I linked to Pop Mech article earlier about it. This sort of poo poo is why I get pissed about balloons. Other than the fact that retards release them outside so they can become somebody else's problem. Also https://en.m.wikipedia.org/wiki/Balloonfest_%2786 Balloonfest '86  
Darkman Fanpage fucked around with this message at 05:52 on Aug 9, 2015 |
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Aug 9, 2015 05:45
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Darkman Fanpage posted:This sort of poo poo is why I get pissed about balloons. Other than the fact that retards release them outside so they can become somebody else's problem. https://en.wikipedia.org/wiki/National_Helium_Reserve quote:By 1995, a billion cubic metres of the gas had been collected, and the reserve was US$1.4 billion in debt, prompting the Congress of the United States in 1996 to phase out the reserve.[4][5] The resulting "Helium Privatization Act of 1996" (Public Law 104–273) directed the United States Department of the Interior to start selling off the reserve by 2005.[6] thanks
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Aug 9, 2015 06:09
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Darkman Fanpage posted:This sort of poo poo is why I get pissed about balloons. Other than the fact that retards release them outside so they can become somebody else's problem. I thought balloons mostly used lower quality trash helium that wasn't worth purifying further?
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Aug 9, 2015 17:04
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United Way BallonFest 86: This is a Good Idea or United Way BallonFest 86: What could Possibly Go Wrong? Thankfully they weren't mylar balloons - those can cause power outages if they drift into power lines or a substation.
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Aug 9, 2015 21:09
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Angela Christine posted:I thought balloons mostly used lower quality trash helium that wasn't worth purifying further? We're maybe a little early into the whole peak natural gas thing to really worry about the lack of a federal helium reserve, but there were probably smarter ways to handle it than flooding the market all at once cause the Cold War's over. Balloonfest was wrong on so many levels. Its like one of those things about having the technology that we could, but the real question is should we? But with balloons.
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Aug 9, 2015 23:13
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We're not going to run out of helium. We're going to run out of cheap helium, like we've already run out of cheap oil and cheap natural gas. As the price of helium increases, it will become economical to exploit more-expensive sources of it. Helium is produced by the decay of a whole bunch of naturally-occurring radioactive elements, which means it's present in Earth's atmosphere in trace amounts; if it gets expensive enough, it'll become economical to extract it from there the same way we currently extract the other noble gases. Neon, for example, is *only* obtained by the fractional distillation of air, and liquid Ne is about 50 times as expensive as helium is (but the helium's cheap because we've been dumping that reserve). Kid's balloons will become more expensive, but we're not going to run out of helium.
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Aug 10, 2015 01:01
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So what you're saying is that we should switch to Neon for children's balloons. Does it change your voice too? This could be win-win
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Aug 10, 2015 01:35
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Scaramouche posted:So what you're saying is that we should switch to Neon for children's balloons. Does it change your voice too? This could be win-win Sulphur Hexafluoride (SF6) will change your voice too!  Doesn't float really well though. 
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Aug 10, 2015 01:39
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Three-Phase posted:Sulphur Hexafluoride (SF6) will change your voice too! It sure does. https://www.youtube.com/watch?v=BXcoGuzsYrM
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Aug 10, 2015 01:45
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Scaramouche posted:So what you're saying is that we should switch to Neon for children's balloons. Does it change your voice too? This could be win-win Hydrogen is cheap and plentiful. 
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Aug 10, 2015 05:03
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Aug 10, 2015 05:45
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He had his fingers in the breech so he couldn't have shot himself in the face. Could have done a fair bit of damage to his fingers though
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Aug 10, 2015 06:02
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Phanatic posted:If it gets expensive enough, it'll become economical to extract it from there the same way we currently extract the other noble gases. He is light enough that at 300K, it's thermal motion exceeds escape velocity from the earth (and it's the only atom/molecule that has that property. H2 can absorb enough energy in the bond to not have enough left over to store as kinetic energy and escape earth, although some does.  )He has to be extracted from mostly natural gas deposits, but I think you can also get it from oil/coal deposits if you care enough and its worth the cost of the extraction equipment. Did kids balloons become a thing when the strategic He reserve was sold down? Or when Mylar became cheap? Or was it a happy coincidence of both?
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Aug 10, 2015 06:37
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Pretty sure that was a joke. James May is an experienced shotgun owner (a rarity in the UK).
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Aug 10, 2015 06:53
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m2pt5 posted:It sure does. Up yours Adam I totally want to try this at home that's awesome
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Aug 10, 2015 06:58
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chitoryu12 posted:Pretty sure that was a joke. James May is an experienced shotgun owner (a rarity in the UK). Yeah, most firearm safety courses instruct you to inspect the barrel after you have ensured that it is safe and unloaded. In Canada we have "PROVE" Point the firearm in the safest available direction. Remove all cartridges. Observe the chamber. Verify the feeding path. Examine the bore. (which is what he was doing)
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Aug 10, 2015 07:05
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Blistex posted:Examine the bore. (which is what he was doing) You can do so from the breech
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Aug 10, 2015 07:07
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chitoryu12 posted:Pretty sure that was a joke. James May is an experienced shotgun owner (a rarity in the UK). There is a video floating around of James explaining to (and then being vindicated by) some sort of military guy that he did that because if you dropped your gun on the way to the north pole and it got snow/ice in the barrel, you would still see light if looking into the breech because the snow/ice is translucent and might create enough back-pressure to destroy the gun when fired so the best way to check for this was put your finger in the breech (to ensure a round could not be chambered) and look down the barrel. Blistex posted:Yeah, most firearm safety courses instruct you to inspect the barrel after you have ensured that it is safe and unloaded. In my experience, most U.S. instructors still frown upon pointing a gun at your (or anyone else's) face even after checking it. Not sure what they do in the U.K.
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Aug 10, 2015 07:10
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Cat Hatter posted:There is a video floating around of James explaining to (and then being vindicated by) some sort of military guy that he did that because if you dropped your gun on the way to the north pole and it got snow/ice in the barrel, you would still see light if looking into the breech because the snow/ice is translucent and might create enough back-pressure to destroy the gun when fired so the best way to check for this was put your finger in the breech (to ensure a round could not be chambered) and look down the barrel. While I fully understand and can sympathize with this. Please show me one loving snowflake in that gif. VendaGoat fucked around with this message at 07:16 on Aug 10, 2015 |
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Aug 10, 2015 07:12
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VendaGoat posted:While I fully understand and can sympathize with this. Please show me one loving snowflake in that gif. I honestly have no idea why he felt the need to demonstrate how to inspect for snow when they were training to go to the north pole instead of just telling Jeremy "if you drop the gun in the snow, don't try to fire it until I check it first".
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Aug 10, 2015 07:23
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Oh goody it's the James May properly clearing a shotgun derail
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Aug 10, 2015 08:07
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Cat Hatter posted:I honestly have no idea why he felt the need to demonstrate how to inspect for snow when they were training to go to the north pole instead of just telling Jeremy "if you drop the gun in the snow, don't try to fire it until I check it first". Because it's comedy light entertainment and he was doing it for the purposes of humour?
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Aug 10, 2015 08:09
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ledge posted:Because it's comedy light entertainment and he was doing it for the purposes of humour? Does James May really seem like the type of person that would look down the barrel of a gun in the interest of comedy? Besides, the other two seemed legitimately surprised. Not to mention that the reason he was explaining himself to military guy on the youtube video is because the other two were still making fun of him for it years later.
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Aug 10, 2015 08:18
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ledge posted:Because it's comedy light entertainment and he was doing it for the purposes of humour? D'you guys know if there's heavy entertainment?
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Aug 10, 2015 08:45
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ALL-PRO SEXMAN posted:D'you guys know if there's heavy entertainment? Well, your mom can be pretty funny.
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Aug 10, 2015 08:51
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He means heavy as in 'high-intensity', not 'curving space-time'.
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Aug 10, 2015 09:02
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Everything that's not light entertainment, I guess? If it requires you to pay attention to the plot or the in-depth explanations, or if it's meant to leave you thoughtful or angry or sad, it's ... probably not light, but I'll leave the exact weight classes of entertainment to someone else. 
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Aug 10, 2015 09:03
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Tony Homo posted:Our gently caress up is fighting the fires. Fires are natural and if allowed to happen would mean less devastating fires. Instead we fight them and allow the underbrush to grow which adds fuel to the fires. You have no clue how fire prevention works do you
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Aug 10, 2015 09:32
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Cat Hatter posted:Does James May really seem like the type of person that would look down the barrel of a gun in the interest of comedy? Yes.
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Aug 10, 2015 09:53
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He's a comedian, most of them look down the barrel of a gun at least once a day.
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Aug 10, 2015 10:49
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Cat Hatter posted:Does James May really seem like the type of person that would look down the barrel of a gun in the interest of comedy? Besides, the other two seemed legitimately surprised. Not to mention that the reason he was explaining himself to military guy on the youtube video is because the other two were still making fun of him for it years later. Yes.
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Aug 10, 2015 13:44
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