-Demosthenes- Posted February 3, 2004 Share Posted February 3, 2004 It might attract attention this time. Can a normal person really buy LN?? In Terminater 2 the robot was completely frozen when he walked through somewhere with little droplets of LN on the ground, he was completely frozen! Link to comment Share on other sites More sharing options...
mossoi Posted February 3, 2004 Share Posted February 3, 2004 Nope waggy isn't a word. Imagine something that wags it's tail a lot. Also take a look at this page http://www.physik.uni-augsburg.de/~ubws/nitrogen.html It has numerous 'fun' things to do with LNO2 lots of which involve pouring it straight on the floor with no adverse effects on said floor. Link to comment Share on other sites More sharing options...
-Demosthenes- Posted February 3, 2004 Share Posted February 3, 2004 Darn, that would be fun to have something like that. Is there a liquid that does do all the fun destructive stuff?? Link to comment Share on other sites More sharing options...
Cap'n Refsmmat Posted February 3, 2004 Share Posted February 3, 2004 Try liquid helium. Put it in a flask with a tube running up the middle, and it will squirt up the tube for no apparent reason. Link to comment Share on other sites More sharing options...
-Demosthenes- Posted February 3, 2004 Share Posted February 3, 2004 Is it really really cold? Whats something thats really really hot? PS: is anything 0 k (-273 C)?? Link to comment Share on other sites More sharing options...
mossoi Posted February 3, 2004 Share Posted February 3, 2004 Nothing is 0K - space itself is just above 0K but for anything to be at 0k it would have to be perfectly insulated which is not possible. Link to comment Share on other sites More sharing options...
-Demosthenes- Posted February 3, 2004 Share Posted February 3, 2004 But scientist have gotten something to 0 k, I heard about it a while ago. Link to comment Share on other sites More sharing options...
mossoi Posted February 3, 2004 Share Posted February 3, 2004 If they had then it would have only been for a very very short time and probably not 0 degrees exactly. Anything at 0K will gain energy from its environment immediately. Link to comment Share on other sites More sharing options...
-Demosthenes- Posted February 3, 2004 Share Posted February 3, 2004 Of course, but I think that it's pretty cool that something can no longer get colder at a certain temperature. Is there a highest temperature we know about? Do the molucules move so fast that the matter just disapates or something? Link to comment Share on other sites More sharing options...
mossoi Posted February 3, 2004 Share Posted February 3, 2004 Cold is not added to a body it is created by the absence of heat - the heat must go somewhere so consequently between any two areas at different temperature there is a temperature gradient. This gradient can be very steep, for instance a very cold object placed next to a very hot opject or very shallow if two objects of similar temperature are placed together. For an object to be at 0 Kelvin and remain there the temperature gradient between it and it's surroundings would have to be flat, as would the gradient between the sorroundings surroundings and so on like the layers of an onion. This is not possible. Link to comment Share on other sites More sharing options...
-Demosthenes- Posted February 3, 2004 Share Posted February 3, 2004 I didn't mean it would stay 0 k, just that it got there. I know all about heat and the absence of heat. 0 k is where the particals aren't moving anymore, and it's impossible to take anymore heat out. Link to comment Share on other sites More sharing options...
mossoi Posted February 3, 2004 Share Posted February 3, 2004 As for the hottest something can get, that depends on pressure and I don't think a practical hottest possible temperature has been recorded. Once a gas reaches sufficiently high temperature it will become a plasma (stripped of its electrons if I think) - plasmas exist at incredibly high temperatures and pressures. Link to comment Share on other sites More sharing options...
-Demosthenes- Posted February 3, 2004 Share Posted February 3, 2004 Really? Cool. What exactly is plasma? Link to comment Share on other sites More sharing options...
Cap'n Refsmmat Posted February 3, 2004 Share Posted February 3, 2004 Plasma=superheated gas. I doubt there's a heat limit, it's just you'd need a really good oven to find out! Link to comment Share on other sites More sharing options...
YT2095 Posted February 4, 2004 Share Posted February 4, 2004 for a start it`s not liquid NO2, it`s liquid Nitrogen. not it`s Dioxide that would form Nitric acid! (It might shift bubble gum tho). lets` get back on topic. and the contention wasn`t the concrete or ashphalt, it was the soft plastic piping that would shatter. Link to comment Share on other sites More sharing options...
mossoi Posted February 4, 2004 Share Posted February 4, 2004 Oops - mental block just kept typing N02 rather than N2. The idea would never work I agree, I'm just trying to dispel the myth that liquid N2 will demolish everything in its path as other people were suggesting. Link to comment Share on other sites More sharing options...
YT2095 Posted February 4, 2004 Share Posted February 4, 2004 in essence the principal of the idea isn`t without merit, however without considerable modification, using the weedkiller backpack sprayer would be at the very least foolhardy, a fracture in the container (and it`s NOT designed for those temps) could very easily get his lower extremities covered in liquid Nitrogen (that would be somewhat unpleasant). Link to comment Share on other sites More sharing options...
agaubr Posted February 8, 2004 Share Posted February 8, 2004 Liquid nitrogen usually requires a device called a dewar flask or double lined tank with a vent to alow the pressure to vent off. The material make must be considerd since metals at very cold tmeprature rearrange into structures which shatter like glass. besides thr transport of liqid nitrogen requires special permits and documentation just to transport the material. No reputable maker would sale the material without an inspection of your equipment and capabilty. It is also rather expensive. Ag Link to comment Share on other sites More sharing options...
Cap'n Refsmmat Posted February 8, 2004 Share Posted February 8, 2004 YT2095 said in post # :in essence the principal of the idea isn`t without merit, however without considerable modification, using the weedkiller backpack sprayer would be at the very least foolhardy, a fracture in the container (and it`s NOT designed for those temps) could very easily get his lower extremities covered in liquid Nitrogen (that would be somewhat unpleasant). And he would be a Darwin Award, no less. At least he'd have honor. Link to comment Share on other sites More sharing options...
JaKiri Posted February 8, 2004 Share Posted February 8, 2004 Cap'n Refsmmat said in post # :Plasma=superheated gas. I doubt there's a heat limit, it's just you'd need a really good oven to find out! Not really, it's a state where the the substance exists as ions in and of themselves. Link to comment Share on other sites More sharing options...
YT2095 Posted February 8, 2004 Share Posted February 8, 2004 Cap'n Refsmmat said in post # : And he would be a Darwin Award, no less. At least he'd have honor. LOL, True, but I`de hate that on my conscience how ever cool that may be (excuse the pun) to posthumousley(sp?) receive one. I`de be somewhat remiss if I didn`t point that out a plasma is an ION cloud usualy created by an elctronic discharge within a gas, the ions are usualy 1 for 1 positive and negative and the cloud conducts as good as any metal might Link to comment Share on other sites More sharing options...
Cap'n Refsmmat Posted February 8, 2004 Share Posted February 8, 2004 All darwin award winners are dead. Unless that's what you meant, I couldn't really understand your post. http://www.darwinawards.com It's "posthumously". Link to comment Share on other sites More sharing options...
YT2095 Posted February 8, 2004 Share Posted February 8, 2004 exactly! and thnx, seems like I just added an extra E Link to comment Share on other sites More sharing options...
Cap'n Refsmmat Posted February 8, 2004 Share Posted February 8, 2004 I bet there's a load of articles on http://www.darwinawards.com about liquid nitrogen. I remember one about a guy swallowing it, but that's it. Link to comment Share on other sites More sharing options...
Guest shallowman Posted February 9, 2004 Share Posted February 9, 2004 Anybody can buy some ln from their local gas supplier -- they usually rent out vented stainless thermos containers. Sure, you could strap a similar container on your back, just don't bend over or the ln will spill on your head! The biggest problem with your "weed killer" idea, I think, is getting the thing out of the container if you really want to "spray" it. Any kind of long dispensing hose will need to be able to physically handle the cold temperature without getting brittle and snapping off -- that doesn't leave many materials, much less, and flexible that you're probably looking for. Also, any long "hose" might allow heat to transfer to the liquid and make it flash... Just some thoughts. No idea is too dumb. Link to comment Share on other sites More sharing options...
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