yea jefferson lab this was the vid i was talkin bout. steve: well atlease my flowers ok! joanna: *crushes steves flower* steve: *trying to put flower back together* i guess i gotta get a new flower...
@flowercowable Bets to let it warm. The problem with frozen water is that you only have an upper bound on it's temperature - it's at least freezing. It could be much colder. If it's near the freezing point, it's not a big deal. If it happens to be much colder, that'll cause problems. Since you really can't tell how far below freezing it is by looking, it's best not to try eating it.
@music47jazz The Leidenfrost effect will only protect you for a very, very short amount of time. Rest assured, if Steve had stuck his hand in the liquid nitrogen, it would very quickly have begun to freeze.
@DaveThickinsonVEVO In a way. If he kept his hand in the nitrogen long enough, all of the fluids in his hand (water, blood, etc...) would freeze solid. If he then hit his hand hard enough, if would be possible for him to break it into pieces. It wouldn't just fall off on it's own, though. At least, not until it thawed and rotted.
@meowmeow5 In that case, you just get squishy flower. If you just let it sit and thaw without squeezing it at all, it'll quickly begin to turn brown and rot. When water freezes, it expends. When this happens inside the cells of the plant, the cells rupture. If the water remains frozen, you can't really tell but, once it thaws, the liquid can flow out of the cells, resulting in a limp, damp flower.
@RickRubik The 500 characters YouTube gives me isn't enough to explain this well... The short answer is that things become brittle when they are cooled below their 'glass transition temperature.' If you have something like rubber, the long, chain-like molecules it's made from rearrange themselves in response to an external force. Below the glass transition temp., they can't do this anymore. Molecules not being able to rearrange = brittle.
@dorkhawky Right. And, even when the Leidenfrost effect putters out, your hand still won't freeze instantly. I'll freeze from the outside in. Don't know exactly how long it'll take for it to freeze solid. Of course, you'll still be doing serious damage to your hand, even without freezing it solid.
I suspect the gauntlets and eye shields are a bit over cautious. I've stuck my finger in liquid nitrogen (for a very short period) and I still have all ten digits. I've also had small splashes on my bare skin with no problems - all due to the protective nature of the Leidenfrost effect.
However, I think dry ice (frozen CO2) requires more careful handling to avoid burning the skin.
It never hurts to set a good example. And, using glassware (even though it's Pyrex) adds additional risk. While it films better, it's always subject to shattering. The amount of nitrogen we use is small and there's a barrier in front of Joanna and Steve underneath the tablecloth that would prevent spilt nitrogen from pouring onto their laps. When we do live shows, we use metal containers.
Dry ice can freeze to your hand which isn't possible with liquid nitrogen, but dry ice can't spill.
Or you could make poor man liquid nitrogen its just not as cool type it in and you can find a vid to teach you. and you guys make me like science more than i already do thanks
Places that supply gases to welders typically carry it. However, if you don't have the right equipment and knowledge to use it safely, you could severely hurt yourself or someone else.
though you doods ignored leidenfrost effect... how about a little test about leidenfrost... would be cool-eth...
kakashi0909 2 weeks ago
What is it with freezing Steve's favorite stuff?
First the rubber thingy that I forgot the name of, then the carnation? Y u so mean to Steve?
upstateNYcuties 1 month ago
yea jefferson lab this was the vid i was talkin bout. steve: well atlease my flowers ok! joanna: *crushes steves flower* steve: *trying to put flower back together* i guess i gotta get a new flower...
jcullom 1 month ago
I mean can you guys do an experiment testing the liedenfrost effect?? Put your hand in basically
oclax15 2 months ago
Wow... AWESOME.
SzymonSmaga 3 months ago
And this is why amateurs should never play with liquified gases. :oD
VulpesFidelis 4 months ago
If you froze lettuce would you be able to eat it straight away or would it have to be warmed?
flowercowable 6 months ago 2
@flowercowable Bets to let it warm. The problem with frozen water is that you only have an upper bound on it's temperature - it's at least freezing. It could be much colder. If it's near the freezing point, it's not a big deal. If it happens to be much colder, that'll cause problems. Since you really can't tell how far below freezing it is by looking, it's best not to try eating it.
JeffersonLab 6 months ago
i wanna break my hand off.
faxmanloveswaffles 9 months ago
Poor Steve , mean Joanna… funny and educational video
johnken0 9 months ago
Steve, you didn't know the Leidenfrost effect.
Your hand will feel ice cold but it's not freezing.
music47jazz 1 year ago
@music47jazz The Leidenfrost effect will only protect you for a very, very short amount of time. Rest assured, if Steve had stuck his hand in the liquid nitrogen, it would very quickly have begun to freeze.
JeffersonLab 1 year ago
I hear this a lot at the start:
"Hi! I'm Joanna."
"And I'm Steve!"
"And this is a container of liquid nitrogen."
newcoolvid27 1 year ago
I'm Steve, and this is my favorite carnation!
1c3f1r3741 1 year ago 2
@1c3f1r3741 It was.
JeffersonLab 1 year ago 7
So, if Steve put his hand in the Liquid Nitrogen, his hand would fall off?
DaveThickinsonVEVO 1 year ago
@DaveThickinsonVEVO In a way. If he kept his hand in the nitrogen long enough, all of the fluids in his hand (water, blood, etc...) would freeze solid. If he then hit his hand hard enough, if would be possible for him to break it into pieces. It wouldn't just fall off on it's own, though. At least, not until it thawed and rotted.
JeffersonLab 1 year ago
werry sad
dukilaki 1 year ago
what about dipping flower in then taking it out and leaving it to defrost, then try squeezing, what happens?
meowmeow5 1 year ago
@meowmeow5 In that case, you just get squishy flower. If you just let it sit and thaw without squeezing it at all, it'll quickly begin to turn brown and rot. When water freezes, it expends. When this happens inside the cells of the plant, the cells rupture. If the water remains frozen, you can't really tell but, once it thaws, the liquid can flow out of the cells, resulting in a limp, damp flower.
JeffersonLab 1 year ago
Why is it that objects become brittle when subjected to extremely low temperatures?
RickRubik 1 year ago
@RickRubik The 500 characters YouTube gives me isn't enough to explain this well... The short answer is that things become brittle when they are cooled below their 'glass transition temperature.' If you have something like rubber, the long, chain-like molecules it's made from rearrange themselves in response to an external force. Below the glass transition temp., they can't do this anymore. Molecules not being able to rearrange = brittle.
JeffersonLab 1 year ago
@JeffersonLab I see. Thanks for explaining.
RickRubik 1 year ago
say...
if you put your hand un liquid nitrogen, it wouldn't be frozen instantaneously, right?
the leidenfrost effect proves otherwise
dorkhawky 1 year ago
@dorkhawky Right. And, even when the Leidenfrost effect putters out, your hand still won't freeze instantly. I'll freeze from the outside in. Don't know exactly how long it'll take for it to freeze solid. Of course, you'll still be doing serious damage to your hand, even without freezing it solid.
JeffersonLab 1 year ago
I wish my lab teacher showed you guys :(
better then Bill nye the science guy (in my opinion)
ackbob 2 years ago 4
WHY???????!!!!!!! lol
feastluva222 2 years ago
:50 = pwned lol,chemistry is so fun to trick people with ;O
bloodbath282 2 years ago
Go ahead, stick your hand in.
Google the Leidenfrost effect.
Bottledcan 2 years ago 12
I know that that works with small quantities of liquid nitrogen, but wouldn't a whole containerful still be cold enough to do some real damage?
amortussique 2 years ago
It's more a question of time than amount.
JeffersonLab 2 years ago
I suspect the gauntlets and eye shields are a bit over cautious. I've stuck my finger in liquid nitrogen (for a very short period) and I still have all ten digits. I've also had small splashes on my bare skin with no problems - all due to the protective nature of the Leidenfrost effect.
However, I think dry ice (frozen CO2) requires more careful handling to avoid burning the skin.
mandolinic 2 years ago
It never hurts to set a good example. And, using glassware (even though it's Pyrex) adds additional risk. While it films better, it's always subject to shattering. The amount of nitrogen we use is small and there's a barrier in front of Joanna and Steve underneath the tablecloth that would prevent spilt nitrogen from pouring onto their laps. When we do live shows, we use metal containers.
Dry ice can freeze to your hand which isn't possible with liquid nitrogen, but dry ice can't spill.
JeffersonLab 2 years ago
That'll only protect you for so long ;) But it's a cool party trick to get a couple of beads of LN2 "dancing" on your hand :D
Cruciatum 2 years ago
@Bottledcan Ah but that liquid nitrogen is almost at its freezing tempreture and if you did do that you woldnt be able to for more than a milisecond
Goofy30000 1 year ago
@Goofy30000 The liquid nitrogen is boiling. It's as far from its freezing point as it can be while still being a liquid.
JeffersonLab 1 year ago
@Bottledcan v=gjsMV1MglA4
dopplerable 3 months ago
loved it when he said WHY!?!?
MrGameAndWatch00000 2 years ago
"its fine"
"no its not" *crushes it and goes to dust*
"Why?!"
you guys are funny.
santa22622 2 years ago 2
cool :P
DesertFury13 2 years ago
I love liquid nitrogen!
tutorialconr 2 years ago
Or you could make poor man liquid nitrogen its just not as cool type it in and you can find a vid to teach you. and you guys make me like science more than i already do thanks
xXAmericanbigboyXx 2 years ago
Yeah, I've seen one of those videos. There's no substitute for the real thing, though.
JeffersonLab 2 years ago
can i ask a question. where can i get liquid nitrogen ive been searching places. help
KingJoker1324 2 years ago
Places that supply gases to welders typically carry it. However, if you don't have the right equipment and knowledge to use it safely, you could severely hurt yourself or someone else.
JeffersonLab 2 years ago