What Should You Know Before Using Liquid Nitrogen?

[gravenewworld]

Well, one should probably enroll in a university physics program.

One could get liquid nitrogen from a company like "Liquid Air (Air Liquide)", or BOC. One needs a Dewar Flask.

Precautions - Do not drink it! Do not pour it on your skin.

My gen chem professor actually took some liquid nitrogen and drank it in class then spit it out. You can drink it and spit it out really fast because the saliva coating on your tongue and the rest of your mouth protects your for a very small amount of time.

 

[tribdog]

I've never tried swallowing really cold liquid nitrogen. that's boring. I got mine boiling HOT first. but I'm pretty brave

 

[Moonbear]

If the pepsi freezes, do you have any Mapp gas?

You never learn, do you?!

 

[Pythagorean]

Do not pour it on your skin.

i have a physics professor that does this, and let's students try it if they want. It rolls right off. I don't know under what conditions it wouldn't, but I didn't want to find out, so I never stood in that line.

 

[Rach3]

i have a physics professor that does this, and let's students try it if they want. It rolls right off. I don't know under what conditions it wouldn't, but I didn't want to find out, so I never stood in that line.

Try it on a floor (much safer) - the boiling bubbles float on a layer of vapor and slide along without friction, as in an air-hockey table.

 

[Mk]

Leidinfrost effect!

 

[brewnog]

I got a flask of liquid nitrogen from my mate's mum, who's a GP. Hours of fun smashing flowers, once I'd finished burning off my own wart!

I've also seen a guy drinking it (well, taking into his mouth before blowing it out) but I seem to remember there's a knack. Didn't dare try it.

 

[Mk]

What kind of flowers should I use?

Really, hours?

 

[franznietzsche]

If the pepsi freezes, do you have any Mapp gas?

I tell people about that incident all the time. You're famous you know.

 

[tribdog]

I tell people about that incident all the time. You're famous you know.

but only to people that hang with you. it's a two edged sword.

two edged sword? wtf am I talking about. After I type lines like that I always wonder what it means and if I really wrote it.

 

[Mk]

Every sword has two edges doesn't it? More than that too. I guess fencing swords (what are they called again?) are round right? So that either counts as one, or too many to count.

 

[franznietzsche]

but only to people that hang with you. it's a two edged sword.

two edged sword? wtf am I talking about. After I type lines like that I always wonder what it means and if I really wrote it.

Hence why you are famous. From california to New Mexico, to wherever Moonbear lives.

 

[Mk]

As well as Guam!

 

[franznietzsche]

As well as Guam!

Saipan too incidently, since I have friends and relatives living there.

 

[zoobyshoe]

Every sword has two edges doesn't it?

Only double edged swords have both edges sharpened so that they cut either way you swing them. These are battle weapons as opposed to fencing foils which are essentially for sport. Fencing foils are square in cross section. They can stab, but not cut. (Fencers put little protective guards over the tips when they fence so they don't actually injure anyone.) Anyway, a lot of styles of swords have only one edge sharpened