agent_zero Posted July 13, 2005 Share Posted July 13, 2005 I dont know if this realy goes here but I want to know what the coldest substance known to man is... I know that liquid helium is the coldest on earth but whats the hottest? Link to comment Share on other sites More sharing options...
YT2095 Posted July 13, 2005 Share Posted July 13, 2005 the inside of a TOKOMAK fusion reactor would be quite toasty! Link to comment Share on other sites More sharing options...
Ophiolite Posted July 13, 2005 Share Posted July 13, 2005 It's rather misleading to talk of 'coldest' and 'hottest' substances. Any substance can be taken to any (physically real) temperature. Temperatures as low as a fraction of a degree above absolute zero have been attained, and, ass YT points out, the plasma in the centre of a hydrogen fusion reactor is like that at the centre of the sun. Link to comment Share on other sites More sharing options...
lethalfang Posted July 13, 2005 Share Posted July 13, 2005 The lowest temperature obtained in the lab is only a few nano-Kelvin, used to produce Bose-Einstein condensate. Link to comment Share on other sites More sharing options...
JaKiri Posted July 13, 2005 Share Posted July 13, 2005 the plasma in the centre of a hydrogen fusion reactor is like that at the centre of the sun. Actually, it's much hotter than at the center of the sun - because you can't simulate the same amount of pressure, you have to up the heat. Link to comment Share on other sites More sharing options...
swansont Posted July 13, 2005 Share Posted July 13, 2005 It's rather misleading to talk of 'coldest' and 'hottest' substances. Any substance can be taken to any (physically real) temperature. In principle, but not in practice. Link to comment Share on other sites More sharing options...
Evangelante Posted July 19, 2005 Share Posted July 19, 2005 Well, isn't a black hole suppose to be created if you get absolute zero or something? I figure if you can get something hot enough, you could create matter. But anything can be brought to a cold degree and hot degree. In principle and practice it can happen, it just hasn't been discovered yet. Link to comment Share on other sites More sharing options...
Cap'n Refsmmat Posted July 20, 2005 Share Posted July 20, 2005 Well, isn't a black hole suppose to be created if you get absolute zero or something? No. Black holes are dependent on mass, not temperature. I figure if you can get something hot enough, you could create matter. ...and how is that? Link to comment Share on other sites More sharing options...
jdurg Posted July 20, 2005 Share Posted July 20, 2005 Heh. I was going to say a scorned woman or an ex-girlfriend. Link to comment Share on other sites More sharing options...
Tetrahedrite Posted July 20, 2005 Share Posted July 20, 2005 Heh. I was going to say a scorned woman or an ex-girlfriend. Or the toilet seat on a winters morning! Link to comment Share on other sites More sharing options...
weldermanx Posted July 23, 2005 Share Posted July 23, 2005 cold and hot are relative your cant call something cold and hot without a point of referance in energy terms the highest for of energy released was at the FERMI labs during antimatter anhialation (i dont think i spelled that right check me here) Link to comment Share on other sites More sharing options...
weldermanx Posted July 23, 2005 Share Posted July 23, 2005 you cannot get matter cold enough to a point where it ceases to exist that would violate the law of conservation of energy. The matter thats sucked into a black hole is not destroyed mearly transported into another time or something like that. you cannot destroy matter or energy it violates entropy if thats the correct word Link to comment Share on other sites More sharing options...
Bluenoise Posted July 24, 2005 Share Posted July 24, 2005 No entropy deals with the 2nd law of thermodynamics. Conservation of energy/matter is delt with in the first. Link to comment Share on other sites More sharing options...
Recommended Posts
Create an account or sign in to comment
You need to be a member in order to leave a comment
Create an account
Sign up for a new account in our community. It's easy!
Register a new accountSign in
Already have an account? Sign in here.
Sign In Now