He didn’t really explain the phenomenon very well, he just kinda described how it looks. What’s happening here is the water is essentially riding around on a cushion of its own vapour, somewhat like a hovercraft. You can actually pour liquid nitrogen onto your hands and the Leidenfrost effect will protect your hand because your body heat boils the nitrogen before it can touch you, provided you don’t cup your hands or otherwise impede its flow (don’t try this at home obviously).
I remember watching this a while ago, then studied this recently at college. Now this popped back up in my suggested feed and I'm only just connecting the ideas!
Since BBC & Freemantle Media are so determined to remove all the episodes that others post, why don't they make them available through Netflix or some other paid source? I would pay for DVDs of the show and subscribe to future ones.
It's a copyright thing. While they've been able to clear the photos and clips used in the show for the UK and, apparently, BBC America, they have said that doing so for an American DVD or Netflix release would prove very difficult.
i would think that is an awesome idea, would love to have the shows on netflix, or some even blockbuster if you can't swing the netflix deal. Need to be able to watch all these great shows other than online where they aren't getting paid anything.
I was extremely disappointed that Stephen didn't dip his finger into water and then dip it into molten metal. The water on your finger also uses the same effect as shown to create a temporary barrier between you and the extremely hot liquid/molten metal albeit only for a small amount of time! If you want to see it done mythbusters have created a really good video on it
Mythbusters demonstrated the Leidenfrost Effect in a much more dangerous and yet interesting way by demonstrating that you can dip your hand in molten metal (specifically molten Lead) quickly if you dip your hand in water first, and you wont get burned.
Yep. It’s also why I was taught in uni that when handling liquid nitrogen, it’s actually safer not to wear gloves because if it spills on your bare hands it’ll bounce off, whereas a glove could force it to stay in contact with your skin.
I wondered what that effect was called!! I play around with hotplates and water drops so often!! Is there a name for the sound when the water rapidly turns to steam when you flick it onto a hot surface? And has anyone else tried to play a song using that sound and wet hands?
I was coming here to say the very same thing. They just dipped thier fingers into a crucible of boiling lead saying the effect stopped them from getting burned.
Mr Goat I‘ve heard of people who injected disinfectant after reading about it online. Just trying to make sure nobody dips their dry finger in molten lead, you never know these days.
Basically, if the surface temperature is enough above the boiling point of the liquid, dropping the liquid on the surface causes the very bottom of the drop to rapidly turn to vapor. Because vapor has a much greater volume than the liquid, it basically lifts the droplet off the surface, and the movement of the vapor away from the gap between the liquid and the surface causes the droplet to move. The other thing is that because the water vapor acts as an insulation, it actually makes the droplet evaporate away more slowly than if the surface was just above the boiling point.
@@LesD9 I'm not an expert, but it appears that it's because of the sharp edge of the next step. The vapor can't escape from that side, so it's forced to the rear. And since each action has an equal and opposite reaction, pushing the vapor to the rear forces the droplet forward. thescienceexplorer.com/nature/watch-water-travel-uphill-navigate-maze has a more complete explanation.
There's a video online of a man running his hand through a stream of red-hot molten metal at a foundry. (Just search on youtube for Leidenfrost effect, its on the first page) - It will come as no surprise that he is Russian
I chose this video instead of the funny one, I was considering, because I "just had to" learn a new word. As an artist and inventor this was faaaar more, than I had expected and hoped for. Pretty basic logic, but not something one just thinks over by one self.
Water faster than rat's in a maze, perplexing,, trouble is a similar experiment would result in the incineration of the rat's and I doubt they would hot foot it out of the maze as quick as the spherical tornado bubble of water 😂👍❤️
I can't watch QI any more. Stephen could be talking about something very interesting and the comedians, desperate to get noticed, will just change the subject to make a not funny joke
I love how enamoured Stephen is with the whole thing
He didn’t really explain the phenomenon very well, he just kinda described how it looks. What’s happening here is the water is essentially riding around on a cushion of its own vapour, somewhat like a hovercraft. You can actually pour liquid nitrogen onto your hands and the Leidenfrost effect will protect your hand because your body heat boils the nitrogen before it can touch you, provided you don’t cup your hands or otherwise impede its flow (don’t try this at home obviously).
You obviously tried this at home.
The mythbusters did a good bit about this, they dipped their hands into molten lead safely because of the leidenfrost effect.
Stephen completely tunes out the outside world when he is busy at his water console.
Fair play to him. It is very mesmerizing after all
@@trickytreyperfected1482 Cocaine will do that to you.
It was rather cute.
0:08 Stephen becomes Emperor Palpatine.
At a certain age, lifting any mildly heavy weight turns all of us into Emperor Palpatine, I'm afraid.
You zoomers have much to look forward to.
Never underestimate the power of the Liedenfrost effect.
@@klaxoncow ok boomer
Some may consider the Leidenfrost effect... unnatural
UNLIMITED POWER!!!
Kei Takashina is one of my lecturers, haha.
mitsterful At what university?
Amir Pourghoureiyan Bath?
DaProHobbit how’d u find that out?
Amir Pourghoureiyan He literally says it in the video...
Glad that mystery has been cleared up ;-)
Legendary comback from Stephen.
I remember watching this a while ago, then studied this recently at college. Now this popped back up in my suggested feed and I'm only just connecting the ideas!
Loving Johnny's Poke-ball/Death Star tee.
Since BBC & Freemantle Media are so determined to remove all the episodes that others post, why don't they make them available through Netflix or some other paid source?
I would pay for DVDs of the show and subscribe to future ones.
Some of the episodes are available on Hulu.
Yes, but precious few.
It's a copyright thing. While they've been able to clear the photos and clips used in the show for the UK and, apparently, BBC America, they have said that doing so for an American DVD or Netflix release would prove very difficult.
i would think that is an awesome idea, would love to have the shows on netflix, or some even blockbuster if you can't swing the netflix deal. Need to be able to watch all these great shows other than online where they aren't getting paid anything.
It is on Netflix...well series 9,10,11 and 12 are.
I was extremely disappointed that Stephen didn't dip his finger into water and then dip it into molten metal. The water on your finger also uses the same effect as shown to create a temporary barrier between you and the extremely hot liquid/molten metal albeit only for a small amount of time! If you want to see it done mythbusters have created a really good video on it
But would it work with molten rock?
OMG! Johnny's Shirt, i love it!
i like to think stephen spends the week before the show just learing this ramdom stuff
Mythbusters demonstrated the Leidenfrost Effect in a much more dangerous and yet interesting way by demonstrating that you can dip your hand in molten metal (specifically molten Lead) quickly if you dip your hand in water first, and you wont get burned.
he should have said that the droplets are levitating above their own vapour, that always blows my mind, even as a scientist.
Huh. That makes sense, thanks.
I miss Stephen and his pure innocence when presenting these little experiments.
Love Johnny's T-shirt.
Because of the Leidenfrost effect, you can actually dip your hand safely in liquid nitrogen for a short amount of time
Yep. It’s also why I was taught in uni that when handling liquid nitrogen, it’s actually safer not to wear gloves because if it spills on your bare hands it’ll bounce off, whereas a glove could force it to stay in contact with your skin.
@Sam Bacon thanks I'll have nightmares about this 😂
It also works with molten lead!
I'm here for Johnny Vegas' Pokeball Death Star t-shirt.
I'm surprised they were able to clear that.
With this fully armed and operational Pokéball, I will capture ALL the Ewoks.
Kei's got the best equipment.
I wondered what that effect was called!! I play around with hotplates and water drops so often!! Is there a name for the sound when the water rapidly turns to steam when you flick it onto a hot surface? And has anyone else tried to play a song using that sound and wet hands?
You should make a song 😊 I should like to hear it.
2:27 When I go to Ikea
This comment deserves so many more thumbs up!
This comment deserves slightly less thumbs up
Mythbusters used this phenomenon to dip their bare hands into molten lead
Weird; I saw that for the first time just a few hours ago.
I was coming here to say the very same thing. They just dipped thier fingers into a crucible of boiling lead saying the effect stopped them from getting burned.
Fcutdlady Their wet fingers mind you.
snk_blk well yes that’s the point. It revolves around water.
Mr Goat I‘ve heard of people who injected disinfectant after reading about it online. Just trying to make sure nobody dips their dry finger in molten lead, you never know these days.
What causes this effect? Does anybody know
Basically, if the surface temperature is enough above the boiling point of the liquid, dropping the liquid on the surface causes the very bottom of the drop to rapidly turn to vapor. Because vapor has a much greater volume than the liquid, it basically lifts the droplet off the surface, and the movement of the vapor away from the gap between the liquid and the surface causes the droplet to move.
The other thing is that because the water vapor acts as an insulation, it actually makes the droplet evaporate away more slowly than if the surface was just above the boiling point.
@@almostfm But why does it go uphill?
@@LesD9 I'm not an expert, but it appears that it's because of the sharp edge of the next step. The vapor can't escape from that side, so it's forced to the rear. And since each action has an equal and opposite reaction, pushing the vapor to the rear forces the droplet forward. thescienceexplorer.com/nature/watch-water-travel-uphill-navigate-maze has a more complete explanation.
@@almostfm Got it! Thanks for that.
I have so much trouble understanding what Johnny's saying, but whatever it is, it must be hilarious.
Shé waz describé litén-frośt
Usually it is 😂
I want one of those.
Amazing
2:30 Takeshi’s Castle Honeycomb maze
Is there any way we could use this as a transport system?
sure, just gotta make sure we don't touch the scalding-hot metal while we're at it
CorvusCorone68 Did you miss the first 4 words?
no, i was saying, i'm sure there's a way but the hot metal could be a major problem
There's a video online of a man running his hand through a stream of red-hot molten metal at a foundry. (Just search on youtube for Leidenfrost effect, its on the first page) - It will come as no surprise that he is Russian
So that's where marillion got the song title if my heart were a ball it would roll uphill from. Cracking song too
Hey I can not get the one day today though I can get you a little bit of
2:09 just as im loading up gta v
The fun demonstration is the "Wet Hand Dipped into Molten Lead" part. Watching this, I am slightly unsatisfied.
That is cool.
'Why have you got your sperm in a pipette?' 😂
2:10 she said while I’m playing grand theft auto.
The lack of subtitles excludes the deaf and hard of hearing community. Is there a way to fix it?
Missed a joke there. Ribbed for my pleasure
2:07 Yeah but we don't
Her boomer was showing. As much as love science, I also enjoy stabbing hookers.
she was joking bigman
That’s fun
I'm surprised they didn't use liquid nitrogen to demonstrate the leidenfrost effect.
Bit more expensive to get hold of and a much higher chance of something going disastrously wrong.
NOT MISCHI-EEEEEEE-VIOUS!!!!! STEPHEN!!!!!
This can happen with a single sausage in a frypan
NEATO!
Why the kids play GTA these days: www.webtoons.com/en/challenge/brown-paperbag/ep-21-space-jam/viewer?title_no=32251&episode_no=22
2:07 Because nobody teaches this to children.
I chose this video instead of the funny one, I was considering, because I "just had to" learn a new word. As an artist and inventor this was faaaar more, than I had expected and hoped for. Pretty basic logic, but not something one just thinks over by one self.
Aisling is so damn hot... just saying.
I guess they can't all be the funny one.
Currently playing GTA V while watching this video. No lie
Why anyone thinks Johnny Vegas is funny is beyond me
é Power-Phull Aadmé untt AuRát SâHîB 👳 🔫 🔫 🔫 🔫 🔫 🔫 🔫 🔫 🔫 🔫 🔫 🔫 🔫 🔫
Pokeball T-Shirt.
floooooooooooooooood Not just a Pokeball, it's also the Death Star.
well Pokeballs spell doom for all those rebellious Pokemon that value their freedom more than fighting their own kind
Water faster than rat's in a maze, perplexing,, trouble is a similar experiment would result in the incineration of the rat's and I doubt they would hot foot it out of the maze as quick as the spherical tornado bubble of water 😂👍❤️
Johnny Vegas being as funny as flu.
why is the audience soooooo LOUD and Fry a peep squeak. awful
Who let Johnny Vegas become a comedian? He's not funny at all.
Johnny Vegas is one of those people that should wear a sort of 'green screen' shirt that shows subtitles for everything they say.
Lots of Americans like that.
QI as it was, in the Toksvig era renamed to Q.B. (Quite Boring) That horrible woman ruined a great show.
I can't watch QI any more. Stephen could be talking about something very interesting and the comedians, desperate to get noticed, will just change the subject to make a not funny joke
Luke Liberman That's what they're paid to do. As for the jokes not being funny, that's simply subjective. You, however, sound like a hoot!
"thats how my sperm reacts to a ridged condom"
haha he's talking about willies.
i guess irrelevant humour that makes no sense just isn't for me
Alan Davies is the best comedian he rarely interrupts and when he does it usually is actually funny.
I feel the same way, some genuinely interesting moments can be ruined. Can be irritating. Never like Johnny Vegas’ brand of humor anyway
Aisling... so hot when she keeping quiet.
You made water, boring.
Kei's got the best equipment.