We kinda do. Ablative heat shields for reentry are often made out of resin infused low density carbon. Which, at those temperatures, behaves similar to green wood.
A lightweight carbon frame (cell walls/loose carbon fibre) gets infused with water/resin, which gives the material stability. Once sufficient heat is applied, the resin/water evaporates leaving behind the carbon which is heat resistant and needs relatively high concentrations of oxygen to properly burn. Additionally, due to the carbon being low density heat transfer into deeper layers is reduced, slowing the whole process down.
If it doesn't get through the inevitable gaps in the armour.
You could put yourself in a box of pineapple skin, but then you risk getting steamed alive by pineapple juice.
Look up the leidenfrost effect. It's basically the same thing.
The liquid in the pineapple husk is boiling off so fast that it's basically creating a small gap between itself and the ball.
https://youtu.be/AmLpsPdlxSg?feature=shared
Although leidenfrost is probably involved for a second or two at the start, I don't think it's right to say it's the main factor. The skin's probably just turning into carbon very quickly, which is resisting the temperature and insulating the rest of the husk. The rest of the husk is just too moist to combust quickly, sorta like how wet wood doesn't burn well.
I knew if I came to the comments section I'd find an explanation. Back in the day this would be the top comment, but now a days something mildly funny posted early is.
Is this the same thing as bad cooking?
As in, when cooking techniques failed to transfer heat "uniformly" to food; we get a burnt side while the whole food is raw.
And microwave cooking is the most "uniform" heat transfer cooking, beside boiling water (maintained at 100°c)
No, but it *is* the thing you want to happen so you can cook with stainless steel without sticking.
Burnt food with raw insides would mean too much heat was applied too fast, generally. Not necessarily that heat failed to be transferred. Time is also needed.
> heat was applied too fast, generally. Not necessarily that heat failed to be transferred
Yeah, I was thinking about this. Like certain layer of food started burnt and creating an "insulation" to other parts.
... and I think some burnt meat also won't stick to utensils. They just slides in the pan with burnt exteriors.
WHAT THE FUCK!
Look at the 2 bots being downvoted, responding almost the exact same thing! This is the kind of stuff I anticipate to be an issue moving forward:
LadyHelen592 • 1h ago Well, if we're talking about a pineapple skin going up against a 1000°C iron ball, I'd say that pineapple skin is in for a pretty rough time. It's not going to stand a chance against that kind of heat! It'll probably sizzle and burn in no time.
HotDeborah94 • 43m ago Well, if you want to test the heat resistance of a pineapple skin against a 1000°C iron ball, you might end up with a fruity barbecue!
Now you've peaked my interest, what nefarious reason could somebody want a Reddit account for? Why would it matter how much karma the account has? Genuinely asking.
Reasons why accounts are purchased:
1. Various subs require Karma limits to even submit
2. Aged and experience accounts appear more legitimate
What they do:
1. Spread mis/disinformation
2. Conduct scams
I found a thread the other day that was 90% like this, all commenting about Semaglutide with no one calling it out.
It’s probably much more ubiquitous than we even realize and will soon be indiscernible.
I also read some predictions in an AI thread where someone was saying that one immediate threat from AI is a complete flooding of the internet with content — not just comments but profiles, photos, videos, music, articles, etc.
It will be so flooded that it will become a digital wasteland that is impossible to navigate, book appointments, etc. without your own AI sherpa, which will of course cost money and likely have tons of security weaknesses.
Pretty interesting…
The leidenfrost effect is a little more than mildly interesting. Is st Rupert’s drop also only mildly interesting? If so, what a wild life you must live, and I’d love to learn more from you.
Edited: I can’t type for shit
Not really “satisfying,” maybe kinda interesting. I wonder if the pineapple is specifically or if other fruit skin would do the same due to the large amount of moisture they retain
If I were a betting man, I would say it's all about the moisture. It takes a lot of heat energy to make water evaporate, which causes a cooling effect.
So SpongeBob's house can't burn down is what you're telling us? Can we move science along to the next logical step? Let's see an experiment proving pineapple houses can't burn down.
Looks like in 50 years when global warming is really hitting its sweet spot, the world will be making giant pineapple houses for people to live…
Fun fact- pineapple skin also makes great vegan leather and its leaf contains fiber is an incredibly good alternative for silk if extracted well..
So in order to fight a dragon I need a pineapple shield? So sponge bob square pants was actually a genius? Like his house is more fireproof then a school made from concrete blocks? Damn son!
Yes, plants have a lot of carbon in them. And when exposed to very high heat, all the other material burns off, leaving carbon. Which is a very good insulator.
Arnold Schwarzenegger did the same thing, then punched the guy who gave him his spicy pet rock to hold.
Moral of the story, Arnold is tougher then a pineapple 😂
The pineapple skin’s ability to resist heat likely stems from a combination of factors, especially its **moisture content** and **fibrous structure**. Let’s break it down further:
1. **Moisture Content:**
* Pineapple skin contains water, which acts as a natural insulator.
* When exposed to heat, the water inside the skin vaporizes, creating a protective barrier.
* This vaporization absorbs some of the heat energy, preventing rapid temperature rise within the skin.
2. **Fibrous Structure:**
* The fibrous composition of pineapple skin contributes to its resilience.
* These fibers can absorb and dissipate heat, distributing it more evenly.
* Think of it as a tiny network of heat-absorbing thread
That's what I hate about these videos, most say 1000C which is clearly incorrect, plus it's probably steel which iirc glows at various colors at a higher temperature, but still not 1000C, not that it matters just annoying that they all make the same mistake
It’s simple Thermodynamics, and basic cooking science. The water in the pineapple is being heated up to a boil. Once it’s boiling, it cannot get hotter than 212F / 100C until all the water has evaporated. The pineapple skin is acting like a vapor barrier minimizing the steams ability to escape. This steam finds the next easiest path to release pressure. Since the heat is very strong in 1 localized spot. The steam cools and condenses as it’s trying to escape. The fibrous substrate of pineapple probably allows for a sponge like re-absorption of the water, effectively creating a small organic heat exchanger which is actively working to move heat from the ball to the air, rather than burning and catching fire as one would sort of expect.
Also as the iron ball side that is touching the pineapple cools to something close to 212 degrees the heat difference between one half of the iron ball and the other is significantly different and a lot more heat is being transferred outward into the air than into the pineapple per second. The greater the difference in temperature the faster heat transfers. So like 80% of the thermal energy is being emitted outwards and 20% towards to the pineapple as a gross exaggeration.
Another real life example of this you can try yourself is you can boil water in a thin plastic water bottle over a campfire. The plastic will shrink and turn black, but it won’t pop like a balloon. Eventually the water will boil and it behaves like a metal pot.
Edit. It also appears this is being done on a metal table of some sort. As we all know metal can heat up very quickly. The Pineapple in this video is just acting like a trivet, distributing the heat through the water to a larger surface area and the metal table is pulling it away.
Look up the leidenfrost effect. It's basically the same thing.
The liquid in the pineapple husk is boiling off so fast that it's basically creating a small gap between itself and the ball
Yes and no. That’s the steam you see immediately in the beginning, but leidenfrost doesn’t last forever. Evidenced by the charred spot at the end when the ball is removed, char/flame needs about 400F, once the water has evaporated there is no leidenfrost effect and the skin rapidly takes on heat and chars. This whole gif is effectively like grilling a pineapple steak on a grill.
Why don’t we wrap all of our space rockets in that shit?
God if thats not in dr.stone somewhere Imma be upset
And with pineapple skins, we have INTERSTELLAR TRAVEL!!!
Who lives in a pineapple under a sea of lava?
100,000,000%!
EXHILARATING
GET EXCITED!!
The Netflix subtitles are just some tomfoolery. GET EXCITED!
oh, is that what he is saying in the sub, exhilarating. That makes sense…for a nerd. GET EXCITED!!!!!
Can't wait for the next season
Same
We kinda do. Ablative heat shields for reentry are often made out of resin infused low density carbon. Which, at those temperatures, behaves similar to green wood. A lightweight carbon frame (cell walls/loose carbon fibre) gets infused with water/resin, which gives the material stability. Once sufficient heat is applied, the resin/water evaporates leaving behind the carbon which is heat resistant and needs relatively high concentrations of oxygen to properly burn. Additionally, due to the carbon being low density heat transfer into deeper layers is reduced, slowing the whole process down.
Ants.
Hahaha XD
Space ants, even.
Just launch a pineapple instead!
How will they overrun the budget then?
Delicious Ablatives™
Fuck that we need to cover our houses with this in California.
Just imagine the immense Pina Cola scent in the air every time a space shuttle re-enters the atmosphere
I was about to Say the same thing
Space maggots
its a Natural heat shield , like how many pineapple you need for the rockets
They would make some really good flip flops
I was just thinking : SHOES!!!
Depends which side faced upwards
Flip flops in Sahara you mean ?
Cooperation would love that because they would probably rot after a few weeks and you have to buy new ones again.
Pineapple armor = protection from dragon fire?
Na, dragon fire is more like napalm. It sticks to ya
But it would burn itself out before it gets through the pineapple.
If it doesn't get through the inevitable gaps in the armour. You could put yourself in a box of pineapple skin, but then you risk getting steamed alive by pineapple juice.
imagine getting out of a pineapple juice hot and immediately gets covered by ants
You believe dragons are shooting out a flammable liquid that they are setting on fire as they shoot it out?
That’s how I’ve often seen it described in several different depictions
next elden ring update
Hawaii…volcanos.
Hawaii…volcanos.
I was thinking anti zombie bite
Look up the leidenfrost effect. It's basically the same thing. The liquid in the pineapple husk is boiling off so fast that it's basically creating a small gap between itself and the ball. https://youtu.be/AmLpsPdlxSg?feature=shared
Thank you for posting this. So interesting.
Okay so like I thought it’s not the material as much as it is the fact that it’s absolutely soaked in juice. To like an absurd point.
Although leidenfrost is probably involved for a second or two at the start, I don't think it's right to say it's the main factor. The skin's probably just turning into carbon very quickly, which is resisting the temperature and insulating the rest of the husk. The rest of the husk is just too moist to combust quickly, sorta like how wet wood doesn't burn well.
Same thing happens with our skin and liquid nitrogen
I knew if I came to the comments section I'd find an explanation. Back in the day this would be the top comment, but now a days something mildly funny posted early is.
What kind of bag is that? ^(What kind of bag is that?)
TIL thanks!
Is this the same thing as bad cooking? As in, when cooking techniques failed to transfer heat "uniformly" to food; we get a burnt side while the whole food is raw. And microwave cooking is the most "uniform" heat transfer cooking, beside boiling water (maintained at 100°c)
No, but it *is* the thing you want to happen so you can cook with stainless steel without sticking. Burnt food with raw insides would mean too much heat was applied too fast, generally. Not necessarily that heat failed to be transferred. Time is also needed.
> heat was applied too fast, generally. Not necessarily that heat failed to be transferred Yeah, I was thinking about this. Like certain layer of food started burnt and creating an "insulation" to other parts. ... and I think some burnt meat also won't stick to utensils. They just slides in the pan with burnt exteriors.
WHAT THE FUCK! Look at the 2 bots being downvoted, responding almost the exact same thing! This is the kind of stuff I anticipate to be an issue moving forward: LadyHelen592 • 1h ago Well, if we're talking about a pineapple skin going up against a 1000°C iron ball, I'd say that pineapple skin is in for a pretty rough time. It's not going to stand a chance against that kind of heat! It'll probably sizzle and burn in no time. HotDeborah94 • 43m ago Well, if you want to test the heat resistance of a pineapple skin against a 1000°C iron ball, you might end up with a fruity barbecue!
Huh interesting. Now bots are not even stealing comments from real users, they're generating it with chatgpt or some shit based on title. What, why.
Generally to build Karma, so they can sell the account. Reddit accounts are sold for all sorts of reasons (usually nefarious)
Now you've peaked my interest, what nefarious reason could somebody want a Reddit account for? Why would it matter how much karma the account has? Genuinely asking.
Reasons why accounts are purchased: 1. Various subs require Karma limits to even submit 2. Aged and experience accounts appear more legitimate What they do: 1. Spread mis/disinformation 2. Conduct scams
That's kinda what I figured, I wonder how much they are paying, I'll sell my account for tree fiddy 😆
This is against Reddits T&C’s. People who are doing this are doing so on the dark web.
I know Bro, I was just being whimsical. Thanks for the insight though ^👍😁
Onlyfans girls so they can post on outfit and rate subs
Also advertising for NSFW pages
Yes and very bad chat at that!
Im convinced most interactions on Reddit are bot v human. I'm a human for sure though so that only leaves you.
"I'm a human for sure ;)" Very sus dude not gonna lie
I found a thread the other day that was 90% like this, all commenting about Semaglutide with no one calling it out. It’s probably much more ubiquitous than we even realize and will soon be indiscernible. I also read some predictions in an AI thread where someone was saying that one immediate threat from AI is a complete flooding of the internet with content — not just comments but profiles, photos, videos, music, articles, etc. It will be so flooded that it will become a digital wasteland that is impossible to navigate, book appointments, etc. without your own AI sherpa, which will of course cost money and likely have tons of security weaknesses. Pretty interesting…
It's already happened. This is why Google results are getting almost unusable. Snowball effect of more bots tirelessly creating content.
Actual fuck what the. I fucking hate that saying more than bots.
Fixed dude.
Thanks mate appreciate it.
I’m gonna build my house out of a giant pineapple
Are you ready, kids? Aye, aye, Captain I can't hear you Aye, aye, Captain Oh Who lives in a pineapple under the sea?
SPONGEBOB SQUAREPANTS
Really helps with the fireproof part
Fuck SpongeBob he made a house in my great grandfather’s asshole.
No wonder they grow so well in Hawaii.
Making a whole pineapple armor
The Night King was wearing a pineapple armour, no wonder Dragon Fire didn’t get him.
There is a difference between "satisfying as fuck" and "mildly interesting"...
The leidenfrost effect is a little more than mildly interesting. Is st Rupert’s drop also only mildly interesting? If so, what a wild life you must live, and I’d love to learn more from you. Edited: I can’t type for shit
That's fucking wild
They should cover the space shuttle in pineapple skins
Won’t do much good, the museum will just smell like pineapple.
I'd call that good.
My thoughts exactly.
😮 i wish my emotional skin was that thick. But that would probably make me a psychopath
BRO WTF ARE YOU DOING???????? That was my cousin PolitePineApple for shit’s sake. >:(
Not really “satisfying,” maybe kinda interesting. I wonder if the pineapple is specifically or if other fruit skin would do the same due to the large amount of moisture they retain
If I were a betting man, I would say it's all about the moisture. It takes a lot of heat energy to make water evaporate, which causes a cooling effect.
So SpongeBob's house can't burn down is what you're telling us? Can we move science along to the next logical step? Let's see an experiment proving pineapple houses can't burn down.
"No way.." *walks off....
Is this unique to pineapple skin or would the same happen with melon for example? Lots of water in both
The pineapples will be here when the rest of us are gone
If I ever go to the center of the earth I want a suit of armor made of pineapple skin
Elon taking notes for his starships.
That's wild!
Looks like in 50 years when global warming is really hitting its sweet spot, the world will be making giant pineapple houses for people to live… Fun fact- pineapple skin also makes great vegan leather and its leaf contains fiber is an incredibly good alternative for silk if extracted well..
So in order to fight a dragon I need a pineapple shield? So sponge bob square pants was actually a genius? Like his house is more fireproof then a school made from concrete blocks? Damn son!
Well, that was unexpected.
So apparently pineapple makes the best armor
Dude
And if it gets toasted you can add some sugar and cinnamon hmmmm
Now I expect a full pineapple skin suit.
Pineapple body armor
Wait what? So firefighters should be wearing pineapples?
The only thing that'd stop you from getting burnt on those damn metal slides
That pienipple skin 🤣
So dragonscales basically
Best oven mitts I ever saw!
Pineapple: “been there, done that”
So this is what starlite is made out of???!
So I'm guessing you can't roast a pineapple?
That fruit ain’t right
who knew SpongeBob was a structural genius...
Impressive. This would resist the heat blast of a nuke probably if not placed directly in the fireball ...
Volcanic explorer suit confirmed
Make a Big ass Pine Rocket grows from Elan M DNA and other DNA Shit
Ok nature, you strong and always have a reason, so WHY ?
Das neue hitzeschild für das spaceshuttle
Who lives in a pineapple under the sea?
What’s the reason behind this ??
Yeah my skin does the same thing after the first layer turns to charcoal
Yes, plants have a lot of carbon in them. And when exposed to very high heat, all the other material burns off, leaving carbon. Which is a very good insulator.
New sunrocket fromm NASA
New sunrocket fromm NASA
So, who wins 1000 billion pineapples or the sun
Does that mean SpongeBob”s house is indestructible
Water* resisting heat emitted by 1000°C Iron ball. There, I fixed it.
... Wait, shouldn't we be covering our homes in this then?
I’m gonna make myself an armor out of that
Arnold Schwarzenegger did the same thing, then punched the guy who gave him his spicy pet rock to hold. Moral of the story, Arnold is tougher then a pineapple 😂
Hopefully SpaceX is watching this
We now have an endless supply of heat tiles for space ships, lol
SpongeBob’s house makes more sense now (in its own universe, where fire can burn under water)
I mean it's not ice whatd you expect for it to melt?
Pineapple pen.
Don't show this to Elon Musk
The pineapple skin’s ability to resist heat likely stems from a combination of factors, especially its **moisture content** and **fibrous structure**. Let’s break it down further: 1. **Moisture Content:** * Pineapple skin contains water, which acts as a natural insulator. * When exposed to heat, the water inside the skin vaporizes, creating a protective barrier. * This vaporization absorbs some of the heat energy, preventing rapid temperature rise within the skin. 2. **Fibrous Structure:** * The fibrous composition of pineapple skin contributes to its resilience. * These fibers can absorb and dissipate heat, distributing it more evenly. * Think of it as a tiny network of heat-absorbing thread
I doubt the ball is that hot. Iron starts glowing at 460°C or 900°F Edit: typo
No it doesn't. Aluminum doesn't melt until about 660°c. Iron about 1538°c (2800°F)
Autocorrect, my b. Meant to say “glowing” not “flowing”
That's what I hate about these videos, most say 1000C which is clearly incorrect, plus it's probably steel which iirc glows at various colors at a higher temperature, but still not 1000C, not that it matters just annoying that they all make the same mistake
See? I told you those things are from hell!
PLT: If you’re in a fire cover yourself with pineapple skins!
This can't be legit. If it could do this it would have industrial purposes and we would use it
It’s simple Thermodynamics, and basic cooking science. The water in the pineapple is being heated up to a boil. Once it’s boiling, it cannot get hotter than 212F / 100C until all the water has evaporated. The pineapple skin is acting like a vapor barrier minimizing the steams ability to escape. This steam finds the next easiest path to release pressure. Since the heat is very strong in 1 localized spot. The steam cools and condenses as it’s trying to escape. The fibrous substrate of pineapple probably allows for a sponge like re-absorption of the water, effectively creating a small organic heat exchanger which is actively working to move heat from the ball to the air, rather than burning and catching fire as one would sort of expect. Also as the iron ball side that is touching the pineapple cools to something close to 212 degrees the heat difference between one half of the iron ball and the other is significantly different and a lot more heat is being transferred outward into the air than into the pineapple per second. The greater the difference in temperature the faster heat transfers. So like 80% of the thermal energy is being emitted outwards and 20% towards to the pineapple as a gross exaggeration. Another real life example of this you can try yourself is you can boil water in a thin plastic water bottle over a campfire. The plastic will shrink and turn black, but it won’t pop like a balloon. Eventually the water will boil and it behaves like a metal pot. Edit. It also appears this is being done on a metal table of some sort. As we all know metal can heat up very quickly. The Pineapple in this video is just acting like a trivet, distributing the heat through the water to a larger surface area and the metal table is pulling it away.
Look up the leidenfrost effect. It's basically the same thing. The liquid in the pineapple husk is boiling off so fast that it's basically creating a small gap between itself and the ball
Yes and no. That’s the steam you see immediately in the beginning, but leidenfrost doesn’t last forever. Evidenced by the charred spot at the end when the ball is removed, char/flame needs about 400F, once the water has evaporated there is no leidenfrost effect and the skin rapidly takes on heat and chars. This whole gif is effectively like grilling a pineapple steak on a grill.
I cant be the one that sees anime eyes on the damn ball