Poor man's "Liquid Nitrogen"

UNSAFE, NOT FOR KIDS! Main article: http://bit.ly/TNXQ7

http://amasci.com/amateur/liquid_n2.html

Can't get liquid nitrogen? Then make your own -80C/110F version by using Dry Ice. Note that this science demonstration involves several major safety hazards, and should only be performed by skilled educators. If used for science fair projects, close parent/teacher supervision is required.

But also go see http://bit.ly/EKqgi SFGATE: "The War On Curiosity" (stamping out hobbyist science in order to keep kids safe.)

For lots of suggested low-temp physics demonstrations click on the above link. Or, look on the web for liquid nitrogen demonstrations.

Note that dry ice comes from companies listed in your local yellow pages. Some welder supply stores carry it. In Seattle, you can find it in the seafood section of QFC neighborhood grocery, and at some Fred Meyer stores. Ask for dry ice pellets rather than slabs, so you won't have to chop it up yourself.

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Lots more stuff at SCIENCE HOBBYIST http://amasci.com/unew.html

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Note: trolls/spammers blocked immediately, zero tolerance

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[qwertzu3]

where in welding is dry ice used? what purpose does it serve there? thanks.

[wbeaty]

> where in welding is dry ice

@qwertzu3 as with liquid nitrogen, not much. Welding supply stores are actually gas bottle distributors, so they're the source for all non-welding gas products for hospitals, research labs etc.

[Kckeller]

Really cool. But you absolutely terrified me the way you handled that butcher's knife.

[wbeaty]

@Kckeller too many television shows.

Get some footage of mom chopping veggies, post to youtube, it looks terrifying. After all, whenever you see someone on TV chopping carrots, you just KNOW they have to cut off their finger. If bacon is frying, Rohrsach is required to use it as a weapon. (Well, not so much if it's the Watchmen cooking show, where they always throw their leftovers to dogs in the back yard.)

[jonnoguano12]

so how do you get rid of this ?

[wbeaty]

> get rid of this?

@jonnoguano12 it's just rubbing alcohol.  Re-use it by letting it warm up, pour into labeled bottle for next time.

[wbeaty]

@abbymichellexx see my other video DRY ICE IS IT LETHALLY DANGEROUS? Dry ice behaves like hot baked rolls or pizza crust, won't burn you instantly. No problem if touched briefly under 2sec, or juggle it between hands. But if you grab and squeeze, gives you bad frostbite blisters.

[wbeaty]

@1isaacmusic can't be trusted with power tools. Round-ended scissors only.

[kking11211]

Frees the dasy

[xxoczukxx]

where can i get dry ice?

[MrGilles1990]

@CheshireGrinningCat It is carbon dioxide in solid form.

[theonetense]

thoroughly unimpressive 

[FlutterbaiDestiny]

Freeze the daisy!

[CheshireGrinningCat]

wasnt dry ice solid Carbon dioxide??