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/sci/ - Science & Math

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6631145 No.6631145[DELETED]  [Reply] [Original]

I need to know some cool stuff about absolute zero and cold things. I'm giving a presentation in my speech class and I want to not bore audience to death.

Something like this but a bit more interesting: http://media.tumblr.com/52fc0efc92e230c5b5d40625f4f113f6/tumblr_inline_n7b8e88Ob91qdvaav.gif (I'm on mobile so I can't post the gif

>> No.6631148

>>6631145
Well the obvious one is superconductors. But wanting to know some "cool stuff" is incredibly vague could you elaborate.

>> No.6631156

>>6631145
negative temperature is a 'cool thing', and you should look into cold ion laser traps and liquid helium pumps with einstein-bose condensates

>> No.6631172
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6631172

>>6631145
super cooled water is neat

water freezes at 0º C right ???

if you are careful and have very pure water you can cool it to below 0º and it will stay liquid until something (usually physical motion) sets off the formation of ice crystals

>> No.6631373

Sadly, absolute zero (from here on out referred to as '0K, because it's easier to type and I like the Kelvin system) is unattainable with current technology, and most likely all technology to come. 0K isn't just 'cold'. It's 'really goddamn fucking cold'. In theory, 0K happens when nothing moves. No energy is going in or out of the object that is at 0K. The reason that this is impossible is because of the lovely atomic forces and, if applicable, gravity.

Not to mention electrons are like little fucking meth heads.

If you want something really neat-o, look into liquid hydrogen. Shit passes through its containers because hydrogen.