When we touch something that is hot or cold, what are we actually sensing? Is it the temperature of the object, or the rate at which heat flows between the object and our hand?
Пікірлер: 1 900
@aviation_nut8 жыл бұрын
Pfft, he knew that meat thermometer wasn't going to work from the start. He just wanted an excuse to eat two cakes.
@WanderingRogue17 жыл бұрын
aviation_nut what if I told you... the cake is a LIE!!
@guyingrey10727 жыл бұрын
100th like
@JoelHudson6 жыл бұрын
Jonatha De Sousa I'd say you like Portal, and GLADoS!
@claireb15736 жыл бұрын
sure he did...
@stoneskull6 жыл бұрын
munchies
@AvenFurness2 ай бұрын
“I’ll take your word for it.” She was fed up with that interview and just wanted to move on 😂
@mynameisben1232 ай бұрын
Hahaha yeh. I totally get what Veritasium is getting at with these misconceptions. But I think most people don’t care at all, they are perfectly happy to hold false or contradictory beliefs.
@PingwinhoАй бұрын
She's made a fool of herself and wanted it to end.
@AvenFurnessАй бұрын
@@Pingwinho she isn’t a fool, she just doesn’t know much of the physics, ignorance does not make someone a fool.
@PingwinhoАй бұрын
@@AvenFurness it's an idiom.
@s4nder86Ай бұрын
@@AvenFurness Fools are fools because of their ignorance.
@AlexE52508 жыл бұрын
"Paper doesn't absorb cold"
@MegaLietuvislt7 жыл бұрын
I paused then just to see if someone else found it incredibly stupid
@itsdestiel98277 жыл бұрын
same
@iaarsoismdiab76207 жыл бұрын
Alex Edwards lol
@rongnui14919977 жыл бұрын
epic
@baileyable7 жыл бұрын
Ok it absorbs liquid nitrogen
@WilliamBradey8 жыл бұрын
This guy has an insane amount of patience.
@gavinvales89288 жыл бұрын
not patience, respectfulness. apart from in that first bunjee jump vid.
@GERMXKINGSClash7 жыл бұрын
it is so funny to see these people answer these questions like he is the stupid person in the conversation
@Sanif5147 жыл бұрын
we all to think we are the ones that know a logical enough answer better than the person in front of us... its hard to remember different logical reasons to things that we already think we know and understand and this happened to me recently in physics and i confused the crap out of myself until i asked the teacher to explain again but still i knew i didn't completely understand.
@L.Reeves7 жыл бұрын
Stupid people are typically more prone to judgement. It's harder to accept new viewpoints if you don't even fully understand the opinions that have been impressed upon you by others. Once you internalize something you don't understand as a universal truth you're in effect giving up on your humanity. It's why religion has been such a smash hit for so long.
@beni14297 жыл бұрын
I really like your statement. A lot of people won't even fully understand what you just meant. In a way, this video is more about this statement above than whether someone believes or understands that the temperatures of the cake and the tin are actually the same. Heck, the lady at 1:31 argues that: "...the metal holds the heat longer and holds the cold longer...". The very opposite logic of this is the reason your hand gets burned - when you touch the tin the heat transfers very rapidly to your hand, and its also the reason the metal appears cold - the heat from your body transfers very rapidly to the metal object. These preconceived notions that "stupid people" typically have are arguably a result of a lack of knowledge or simply a willing to care. People are too busy with their lives to even consider an arguably shallow concept like this one. Just as their religion was injected into their life, whether it be from and early age or later in life, they simply knew it as others had told them. Why would they consider such a shallow concept such as: "God doesn't exist", when their bodies thought it real before their minds even understood, or could yet to understand?
@333angeleyes8 жыл бұрын
I love the way his mom keeps smiling at him, she seems so proud
@Soulmaster1878 жыл бұрын
I think she has ever reason to be!
@suwinkhamchaiwong83827 жыл бұрын
well. duh.
@stoneskull6 жыл бұрын
she's a good mum. is she australian?
@lordx46414 жыл бұрын
@@stoneskull no
@alinaqirizvi1441 Жыл бұрын
@@stoneskull south african
@TheInimicus9 жыл бұрын
I think people can't distinguish phrase "it's cold" from "it feels cold".
@AbsoluteTrash_8 жыл бұрын
+Danon W I think of hot and cold and warm, that kind of stuff as a perception.
@viyusavery2488 жыл бұрын
+Danon W there is no such thing as hot or cold in the first place
@chrisakaschulbus49035 жыл бұрын
@@viyusavery248 and there are no humans, trees or cars, its all just atoms
@paavobergmann49205 жыл бұрын
Because our built in sensor system only registers temperature change of the sensor (nerve ending), so our body can´t distinguish heat flow from temperature.
@chrisakaschulbus49035 жыл бұрын
@@paavobergmann4920 oi oi oi, mr. escobar your delivery is awaiting you in the basement. yeah, only temperature change. i think that's the reason why sometimes when i want to wash my hands in the winter it never feels like there is cold water coming out of the tap when my hands are cold... if i then drink it i know that it is indeed, cold
@SkizzlePiano8 жыл бұрын
paper doesn't absorb cold... it all makes sense now
@AbsoluteTrash_8 жыл бұрын
+SkizzlePiano Thats what i thought
@HelenaTing06248 жыл бұрын
+jamiepie123 i dont know if you can tell +SkizzlePiano is sarcastic but theres no such thing as absorbing cold
@AbsoluteTrash_8 жыл бұрын
+Jose Ting I Know i was just going with the joke
@LimitedWard8 жыл бұрын
+SkizzlePiano It's technically not too far off. If by "not absorbing cold" you meant "a worse conductor of heat", the statements are quite similar.
@stepangorelenkov64128 жыл бұрын
+LimitedWard one just sounds really stupid and the other does not
@bluflare123459 жыл бұрын
0:53 When she said paper doesn't absorb cold I literally smacked my forhead.
@Goodwithwood699 жыл бұрын
It's not that much of a stupid thing to say, paper is a good insulator and metal isn't.
@Crawlerjamie9 жыл бұрын
Hahaha wtf?
@Hack3r919 жыл бұрын
Matthew Smith She also says that "metal holds the cold longer" which makes zero sense.
@StephanieL1809 жыл бұрын
Skyfire Did you knock yourself out cold?
@klyxes9 жыл бұрын
Matthew Smith it is a VERY stupid thing to say....its the exact opposite of what actually happens. paper doesnt absorb HEAT as well as metal and doesnt release it as well...as well.
@ElectroMonkeyz10 жыл бұрын
the only time I bake a cake is when I want to prove a point too! the point being that cake is delicious.
@fred321cba10 жыл бұрын
I don't believe you. You're going to have to prove it to me. (chocolate please).
@necrocratics2 жыл бұрын
hi
@enginesandmore10133 жыл бұрын
Thermodynamics: *exist* Some person: "paper doesnt absorb cold" Thermodynamics: geuss im just a joke
@queazel80459 жыл бұрын
The other big misconception is that a fan will reduce the temperature of a room. I've seen people put a fan in a hot room, close the room and wait for it to cool down.
@uegvdczuVF9 жыл бұрын
lol. True.
@tenshistrife9 жыл бұрын
it does not reduce the temperature of the room but it does feel cooler for the same reason described here. when air is stationary its takes less heat off your body as the heat has to propagate through the air merely on the airs natural movement, but when then air is circulating due to a fan blowing it around more air is passing over your body and the new air has yet to absorb heat from you so it can absorb at a higher rate and as that heat blows around the room it distributes that heat all over and allows it to propagate into the walls, ceiling and floor much better due to a larger surface area to work with. so yea it does not cool the room down but it does cool you down. _though admittedly I don't think I did a very good job explaining it here._
@uegvdczuVF9 жыл бұрын
Tenshi Strife I think he means an empty room, as in nobody in it.
@tenshistrife9 жыл бұрын
right, but it would still cool the room, slightly, as moving air redistributes and disperses the heat better. In a perfectly sealed and insulated system, yes the heat would remain constant, maybe even increase with the fan generating heat due to motion, but a room is not a sealed system. This kinda ties into another common misconception that at all times all the air in a room is the same temperature, which is not true, there are pockets of hotter air and pockets of cooler air. and the heat wants to go into the cooler areas, such as the cooler pockets of air or the walls or out a window or whatever, but with stagnant air it has to travel through to adjacent air and repeat to get to the cooler locations, by moving the air it can travel more freely. as this hotter air passes cooler locations it bleeds off a bit of that heat, and cools down, then it gets back to the hotter section and heats back up cooling the hotter section of the room, it keeps cycling like this, making the temperature more unified and also bleeding some of the heat out of the room. so it would in fact probably lower the ambient temperature of the room, not as significantly as it would with say AC but a noticeable few degrees. kinda long winded I know.
@uegvdczuVF9 жыл бұрын
Tenshi Strife I say it would heat it up by using the principle. Presumption is that outside is hotter than the inside of the room, otherwise why close it when you could just open the windows and let the cooler air in. :) "long winded" - air circulation pun?
@randyyyyyyy69772 ай бұрын
Why did the algo dump me here in 2024
@SquiskyАй бұрын
I mean... I've been subscribed to Veri. for maaany years. But I haven't watched this before either.
@professionalprofessor2719Ай бұрын
Lol I've also been subscribed for many years. However, I've seen this video before. YT has been suggesting lots of vids lately that are 5+ yo and acting like I've never seen them 😂
@yosh6278Ай бұрын
Facts
@valerii-link13 күн бұрын
You smart.
@soumelee56612 жыл бұрын
i studied a lot of physics in high school but all of it didnt make full sense to me. So many things happened during that time that it was overwhelming and i didnt have enough time to think about all that i studied other than learning them to pass numerous tests. Now in uni i started questioning stuffs again and kept googling and learning and came across ur videos. TBH we are lucky that u have made all these type of videos and im so thankful. Ur videos feed my curiosity more and more and i want to read and understand all about such amazing concepts.
@Ifartedonyou43 Жыл бұрын
Agreed, the real word experiments really question our education of physics
@robyn645410 жыл бұрын
"paper doesn't absorb cold" I literally slammed my head on the desk
@klyxes9 жыл бұрын
Niels Rasmussen nothing...NOTHING absorbs cold...think of it like this...cold doesnt exists (the opposite of energy doesnt exist). only energy exists and we use the term "cold" to explain that something has little thermal energy when compared to another thing
@heysoymarvin9 жыл бұрын
alex sun I know! It bothers me too!!
@mrchangcooler9 жыл бұрын
***** Well, not exactly. You can't have an absence of energy, it's literally impossible. Cold is when something has less energy than what it has at the moment.
@HyatusPK6 жыл бұрын
I love you
@GBart6 жыл бұрын
my reaction to "jet fuel can't melt steel beams"
@LemonChieff8 жыл бұрын
Real question is: how good was the cake ?
@meeatdingoman48818 жыл бұрын
That's a very good question.
@LemonChieff8 жыл бұрын
Charlie Tango D: THE CAKE IS A LIE
@redanima20438 жыл бұрын
lol
@decked21998 жыл бұрын
+Vynyl Welsh maybe the mom was raised in Britain while he was raised in the mid-northern United States
@siddharth27963 жыл бұрын
Very good
@pitbull47782 жыл бұрын
3:17 I love how your mother looks at you feeling very proud, even though you've just started your KZfaq career. Can't imagine how happy and proud she feels now.
@veritasium13 жыл бұрын
@Fergussonification haha - yes I thought about a thermocouple, and you may well be right about the emissivity - but I'm not sure this was the main source of uncertainty. I noticed a lot of variability in temperature around the cake, plus the temperature dropped remarkably quickly. The pan was down to 40C in under a minute.
@veritasium13 жыл бұрын
@elmepo232 the performance mic was a new purchase on my North American trip - I will be using it in interviews from now on. I should add that the purchase was inspired by comments like this one.
@truennn10 жыл бұрын
Is it bad that I laughed when she said metal absorbs cold?
@chayanka_kaushik6 жыл бұрын
Absolutely normal
@titancsokona92286 жыл бұрын
For me it's like when someone says: "If you stick an umbrella up your anus and open and close it 10 times it'll cure your cancer." so no laugh as much as you want.
@canatronYT6 жыл бұрын
Titan Csokona people attribute properties to what they percieve and sense. If they feel a wall with less absolute heat than their hand they will have the sensation of "cold", they could then apply this observation to how objects retain "hot" and "cold". You are watching these videos, and that means that you are part of a specific group of people who are interested in science and learn about it in their spare time. So to assume everyone has the same interests as you and that the only reason they dont know as much about thermal conductivity is because they are stupid is ridiculous. So no, basing how the world works based on observations is not the same as your stupid example.
@titancsokona92286 жыл бұрын
I am sorry, and that was so good I literally shed a tear. (When I wrote it I had a really bad day)
@iCore7Gaming5 жыл бұрын
@@canatronYT it's common knowledge mate. You are taught this in schools. If you don't know this basic stuff I'm sorry but you must be only be able to work in McDonald's at the age of 50
@JayCherriReactPODCAST8 жыл бұрын
Just like when you reach for your seat belt in 100 degree weather and the metal buckle burns you but the nylon belt doesn't.
@EpicUltraKingSmizzy8 жыл бұрын
its caust the belt doesnt absorb the cold
@jonathanlowe87558 жыл бұрын
Or the cheese on pizza burns the top of your mouth and the crust doesn't.
@mrferris43797 жыл бұрын
Jonathan Lowe that's because the crust is on the bottom sort burns ur tung. Der 😁
@turolretar5 жыл бұрын
Chris aka Schulbus nice
@iCore7Gaming5 жыл бұрын
100 degrees????? No where on earth is that temperature. Highest was like 56??
@StereoSpace8 жыл бұрын
I remember taking my first physics class in high school and learning about heat transfer, conductivity of heat through various media, many of things he touches on here. Had I not ever been exposed to that knowledge, I would be as confused about it as any of these folks.
@trevsoe2 жыл бұрын
yeah and im doing this in grade for XD
@TsieLeMoswang10 жыл бұрын
3:14 "but i could be wrong" yeah right..
@user-co6rg9jt9x3 жыл бұрын
Exactly, it's what those people couldn't even consider saying, so annoying tbh
@TheHadesShade3 жыл бұрын
He just wanted cake ;)
@tanvirfarhan55853 жыл бұрын
value of pie 3.14......................................
@Gnurklesquimp9 жыл бұрын
''And what if I told you these are the same temperature'' ''No I don't *agree* with that'' lol
@DesertCookie4 жыл бұрын
A very polite way to say that. This you got to count in her favor :P
@mattdamon67718 жыл бұрын
Lost it when she said "Paper doesn't absorb cold."
@necrocratics2 жыл бұрын
Hello
@anthonyd.80672 жыл бұрын
You meant to tell me this whole time I could have been insulating my thermos with paper in order for it never to get warm!
@LookingGlassUniverse11 жыл бұрын
Great question. Just wanted to know your thoughts on why sweating wouldn't work in the humid environment.
@LtFoodstamp3 жыл бұрын
Air can only hold so much moisture content in a vaporized form. If it's at 100% saturation, then your sweat cannot evaporate, and thus can't help cool you off. If the vapor content goes above 100% it recondenses, which is why you get rain when the air is "too full of water vapor".
@aliediskasoglu79983 жыл бұрын
@@LtFoodstamp I like that explanation. Makes sense.
@joerostkowski73132 жыл бұрын
Sweat is used to transfer heat(evaporate) humidity slows down heat transfer. Takes more btu for change of state (laten heat) in a high water colum
@RollerCoasterManiac12 жыл бұрын
I remember when I first learned about specific heat and how I was blown away when you think about how metal object and a wooden object of the same temperature feel different temperatures. It was so mind boggling because of the incorrect way we define "temperature."
@penguincoalition42079 жыл бұрын
Who else was shouting "THE METAL CONDUCTS HEAT BETTER!!!!!"?
@111asel9 жыл бұрын
+PineapplePenguin55 me
@thejuanpa888 жыл бұрын
+PineapplePenguin55 Calm down minecraft boy
@jur4x8 жыл бұрын
+PineapplePenguin55 Anyone who actually did went to school, I guess.
@AlexE52508 жыл бұрын
+jur4x but apparently you did not went to grammar class. :P
@markwhiting52016 жыл бұрын
PenguinCoalition yep.... The the stupidity of people hurts my head everyday. Sadly they outnumber the smart people and they're still allowed to vote 😏🔫
@squidwardfromua2 ай бұрын
That's a great example of how our perception can be deceptive, even if our senses are telling the complete truth. The problem isn't on the fingertips, it's in the brain. Our understanding of reality can't be perfect and should always be questioned.
@RohannvanRensburgАй бұрын
But our understanding of reality is a primarily abstracted one. Since our senses *do* tell the truth it's quite often the case that our intuitions are correct, even if we don't understand them. A hot seatbelt buckle *will* burn you in the summer, whereas a nylon belt won't. Sitting on a metal seat in the winter will be significantly less pleasant than sitting on a polyester seat with foam in it. None of these are incorrect, which is frankly of infinitely more importance than an abstracted understanding.
@Username-2Ай бұрын
@@RohannvanRensburg Senses and perception are obviously important, but they only get you so far. I would argue that understanding exactly why things feel hotter, and how material physics actually work on a molecular level and how heat transfer works is infinitely more important because without it we would not be able to design and build any of the modern technology that we use today in society.
@OliverOttomanАй бұрын
The vast majority of people do get by on their normal senses and perception. And it's important to note that science is not somehow abstracted from senses or perception either; it too relies on them completely, even if it uses tools. Taking the smug, "um actually science says they're the same temperature" approach, like in this video, is basically asserting one definition of temperature over how it's almost always used in practice. He is essentially playing a semantic game based on a highly technical and historically particular usage of "temperature" that doesn't correspond to reality as it is actually experienced by people. They're not wrong to say the metal is colder, because that's how they're actually experiencing it. Read Heidegger.
@carlitosandres8 жыл бұрын
A lot of smartasses in here. Thermodynamics isn't intuitive fellas. To fully understand this video you need to know about: 1. The definition of heat and the nonsense of "cold" 2. The definition of temperature 3. Zeroth law of thermodynamics : A being the metal, B the book and C the air... 4. Thermal comfort, which in turn requires some human biology, the first law of thermodynamics, psychrometrics, statistics, and heat transfer. (maybe I forgot something) Not easy. So please don't mock people and rather try to educate them with the knowledge you've got. Everyone is ignorant about many things, that isn't bad per se, being comfortable with ignorance is bad. The peope in this video showed willingness to learn something new, so what's wrong with that?
@solaaar38 жыл бұрын
+carlos k absolutly nothing.
@harrisonc48588 жыл бұрын
+carlos k stuff yourself
@mbk39868 жыл бұрын
His methodology is that he starts with the misconceptions because then the person listening has to actively think about it and not just use old, often inaccurate, information. He wrote his PhD on this. Please type his name and ted ed in on KZfaq and you'll be able to see why he does it this way.
@carlitosandres8 жыл бұрын
+mbk3986 I wasn't criticizing him, I get what he's doing. But take a look to the other comments, for a lot a "geniuses" the answer was quite obvious... I don't believe them.
@carlitosandres8 жыл бұрын
+Harrison C ¿?
@goodguy_25507 жыл бұрын
can u guys stop calling those people dumb... I know some of the answers were stupid but they are just people who are not into science... the fact that u r watching this video is because u like science.
@danielgranjaconejeros635510 ай бұрын
I was preparing some coffee and it made me think about heat transfer. I immediately remembered this metal vs book analogy and came to look for this video. Just a classic and simple explanation! But didnt remember that Derek's mom was in it. They both look so sweet together. Cant believe that was 12y ago.
@olivierastuces111810 жыл бұрын
Your channel is at the present time the most interresting channel I know on KZfaq. Thank you for your work !
@justplainskill10 жыл бұрын
You should check out Vsause He does stuff like this too. Very interesting :)
@jonathanowo75847 жыл бұрын
justplainskill he's more of a theory then experiment guy
@ayushdeshmukh2847 жыл бұрын
Still interesting enough
@LookingGlassUniverse11 жыл бұрын
Oh, I see what you mean! But is there anywhere with 100% RH? Because I've been to a few tropical countries and sweated quite a lot.
@koolkiddie2 жыл бұрын
Sweat occurs to keep your body cool, when condensation happens it takes away the heat in your body
@effeKtSVK8 жыл бұрын
Same thing is when you have cold hands and you wash your hands in warm water, you feel it like it's hot. But when you have hot hands you might feel that warm water is colder. :)
@FazalFariz7 жыл бұрын
I learnt something as well, I knew metal was a heat conductor, but never thought those two objects would be at the same temperature. Thanks Derek.
@dannoland3 жыл бұрын
I recall first learning this concept decades ago from a book that explained why on a cold morning, bare feet on a bedroom carpet do not feel near as cold as bare feet on a tile bathroom floor. Both are in the same house, so they must be the same temperature, but one feels cold while the other does not. Thermal conductivity is the answer.
@DabbinLlama8 жыл бұрын
Do you ever interview people that actually know what you are talking about and you just have to edit them out?
@vuongkyvi7 жыл бұрын
His point is to show the basic misconceptions, so he has to show the people who got it wrong
@umnikos7 жыл бұрын
Zane Crabtree I think 50% of the people he interviews nail it, but if he shows them too then the whole video becomes pointless
@ayushdeshmukh2847 жыл бұрын
Well obviously some people will get it, but I'm sure the vast majority of Adults and elderly won't
@mirageinthedesert54486 жыл бұрын
Ik
@anthonysmith4222Ай бұрын
His own mother didn’t get it either
@robertoopa374810 жыл бұрын
"Paper doesn't absorb cold. " ROFL xDD
@dozen52815 жыл бұрын
i know it has been 8 years but if somehow you read this i wanted to thank you because this was a question on my physics exam and i would've never guessed it without you
@jffrysith436511 ай бұрын
this is great, but a good part of the explanation around this is to mention that the human body is hotter than room temperature (due to the general chemical processes occurring within your body creating a lot of friction and heat within it. This means there is a difference in temperature between you and the book / you and the dvd player. Since the dvd player has a [higher?] heat capacity, it 'accepts' more of your heat, causing your hand to cool down faster. Other than missing this point, this video is spot on. [when you're 12 years late to appreciate a good video on time lol]
@Obleddo8 жыл бұрын
This is great! Standing in a 10°C room is no problem. Standing in a 10°C pool causes me to swear. Water conducts heat better than air :P
@hagalathekido8 жыл бұрын
+Obleddo yep, water is often warmer and air conducts less heat so thats why if youre wet and stand up you get the cold properties of both then the water conducts heat/cold from the air and shares with you
@ch3z2315 жыл бұрын
Water has a higher heat capacity.
@albertripoll50725 жыл бұрын
@@ch3z231 What does the hability to conduct heat faster from an object to another relate to heat capacity? The former is termal conductivity (what's the vid about) and the latter is the capacity to absorb a certain energy to change the temperature 1°. Those the definitions, but is there a relation between them? I just ask for curiosity since you mentioned heat capacity.
@vishvpower93305 жыл бұрын
No it is bcs water takes more heat to raise its temperature thus causing extra loss of heat from your body
@Bella18994 жыл бұрын
You sweat from 10 degree water? You must be an eskimo.
@snuckyr5 жыл бұрын
"Nah, I don't agree with that" LOL
@bob80655 жыл бұрын
"What if I told you they were the same temperature?" "I'll take your word for it"
@TeoGrehan3 жыл бұрын
WOW the red rag hanging on the oven at 2:02 is so relatable. I've got the exact same hanging on mine as I'm sure everyone else does as well haha. Nice!
@shivendrasingh60002 ай бұрын
3:28 I hate my mind 😂
@theendofthestart81792 ай бұрын
I also hate your mind lmao
@jksdfgyjfhgud7 жыл бұрын
"paper doesn't absorb cold" I literally jumped out of my 3 story apartment window and slammed onto the sidewalk head first.
@mattvw928711 жыл бұрын
I will say that when I first grasped this concept my sophomore year of high school, it changed my outlook on life almost as much as calculus did.
@herithchysemi10 жыл бұрын
Great video! I recently came across with your channel, and I really enjoy your approach on science topics. I still remember how hard and mindblowing it was to me to come up with a tangible idea of heat. In fact, we usually end up thinking about heat as "something" that flows from hot surfaces to colder ones, implicating a temperature variation. It was even more incredible when I learnt that it is actually possible for heat processes to occur at CONSTANT temperature... heat is weird stuff LOL.
@Antelieris110 жыл бұрын
0:52-0:54 Facepalmed so hard I needed a moment to recover.
@jorrfreysert25306 жыл бұрын
"Paper doesn't absorb cold" I'm starting to question the sanity of the general public
@harshgupta22202 жыл бұрын
I really love and appreciate such eye-opening videos.
@Wonderland_Homestead5 жыл бұрын
I think you could teach us a lot abut being patient, which is one of the most important aspects of socializing, which is one of the most important aspects of being a human.
@FatherManus3 жыл бұрын
1:32 She got that entirely backwards. Metal transfers heat better than almost any other substance which means it doesn't hold heat well at all.
@atreyashetty72153 жыл бұрын
1:42 Derek's reaction is priceless 🤩🤩
@partibananathurai58628 жыл бұрын
Amazing to see how far Derek has come (I mean the science is just as interesting but I mean in terms of video quality etc.)
@SambodhiBhattacharyya04 жыл бұрын
Another nice demonstration of thermal conductivity affecting the perception of heat is if you heat a wet wooden spatula in the microwave. It feels hot to the touch when it comes out, but after 5 seconds or so, it'll only feel warm immediately after being touched, but keep the grip on and the perceived temperature ramps up
@seanoconnell216210 жыл бұрын
That infrared thermometer gun could be used for the best pick-up schemes.. (Enter attractive female) *Slightly tilts sunglasses and wields infrared thermometer gun. Aims at female and checks the reading* "Yep, she'll do"
@kalolord10 жыл бұрын
My gun says you're hot.
@yosyp59059 жыл бұрын
The feeling that you get when you know the answer before this genius guy tells it... Oh man, so satisfying. Better than taking an A on a math test.
@andrewholzgrove73318 жыл бұрын
+Yosyp Ha what a nerd.
@hagalathekido8 жыл бұрын
+Yosyp ik :D i love basic physics
@ch3z2315 жыл бұрын
Soooo satisfying.
@DesertCookie4 жыл бұрын
What you just described is 12 year old me - only that this video didn't exist back then and I never felt that joy...
@simarpreetsinghmamik9 жыл бұрын
Hey Derek, could we please have a video about the working of that infrared thermometer? Its kinda cool how it measures the temperature without any contact. Thanks!
@frobzwiththingz7 жыл бұрын
First off, i'd like to say that i really love your videos. I'm always interested in seeing and comparing techniques for teaching people non-intuitive physics and math concepts. Great Ghu knows this world needs so much more of decent instructors. Specifically here, though, I sort of wonder - conduct *enough* of these random interviews here, and *eventually* you're going to run into somebody who responds with something like "Hmm, well, as soon as I actually *grab* the book and hard drive case, I substantially change the surface boundary conditions that you have to solve the Laplace Equation (or , oh crap, I've got blood flow, and can sink heat, so maybe that's not good enough and we need Poisson's) for, and most likely, the different heat conduction properties of the two also implies that *at the point my finger sensors are measuring*, the temperature of the two objects really is different. Lets look at them with a FLIR camera after I let go!". When you eventually run into that person, will you find a way to edit them into your video? :-)
@sethuramanjambunathan10 жыл бұрын
It is a very 'cool' demo. lay(wo)men or for that matter anybody has a misunderstood idea on temperature. Thermal equilibrium is not a well understood concept by all. Measuring the temperature of cake and container is very illustrative. My appreciation for Vertasium scientific invention.
@GotPoffins10 жыл бұрын
New favorite channel.
@JamesKing2understandinglife8 жыл бұрын
I love this video. Well done. They feel like different temperatures but are in testing the same!
@bingbongcentralhq10 жыл бұрын
The idea of making a physics video about misconceptions is brilliant.
@MystyrNile10 жыл бұрын
Wait a second, the one in the red jacket is the one from the Shadow Illusion video! On the same day!
@nyak63RUS8 жыл бұрын
I want a t-shirt that just says "Absorb the cold"
@bullainsworth31304 жыл бұрын
I would love to see you revisit this subject, but introduce a space shuttle thermal protection tile into the mix. It would make for an interesting video.
@vijeykrishnaa22306 жыл бұрын
Wow! I'm binge watching all of these videos... And they are awesome!
@mosab6438 жыл бұрын
i tell this to my mom and she doesn't trust me...i also have to keep insisting with her that letting a fan run inside a room won't make the room cooler, if anything it'll make it hotter. I guess i'll have to end up buying an infrared thermometer to actually prove these facts to her
@deismdrake64768 жыл бұрын
but, wind chill.
@zilvoxidgod8 жыл бұрын
+mos ab A fan will make the room cooler if it's pulling air from a cooler place into a warmer place. Insulated houses can retain heat faster than the outdoors, so running a fan can pull air from the cool night air into the still-warm house.
@mosab6438 жыл бұрын
Nudedragon you are just being a schmuck and you know it
@user-wo1ur5tz9d8 жыл бұрын
Depends, if it is just a fan alone it will make you hotter since it is blowing hot air to your face at a faster rate and is direct, but if the interior of the fan is designed to cool hotter air to cooler ones, it should cool you down.
@ryandoesthesports7 жыл бұрын
Isnt it like there is no such thing as cold only absence of heat?
@ynotbegoodtoall11 жыл бұрын
Love your videos, watching them all and definitely subscribed.
@alexsavastru81253 жыл бұрын
I am so glad that I answered this correctly. I even thought thermal conductivity was the key to the perceived temperature difference between the two objects. Makes me so happy to finally get something right considering I just (possibly) failed my maths exam in uni xD
@TheCrimsonIdol9879 жыл бұрын
It's surprising that many people have forgotten that metal is a great conductor of temperature, that's why metal feels hotter because it conducts heat very well.
@4kezzah9 жыл бұрын
yah i think there is a lot of confusion between temperature and heat. metal is a great conductor of heat not temperature. that why those guys probably assumed that the temperature would be different because they assumed heat and temperature are the same thing.
@Miss_Darko9 жыл бұрын
Incidentally, this is why outer space doesn't actually feel that cold. Since it is a vacuum, it can't conduct heat from your body. You will still lose heat through radiation, but it is a much slower process for our bodies. So the actual sensation of the 'temperature' of space would be quite pleasant when the sun is eclipsed behind the Earth (of course, the sensation of having all of the gases in your bodies forcibly expelled from all of your orifices at once and then blacking out from shock and asphyxiation will be decidedly less pleasant). If you were to somehow remain conscious but exposed to the vacuum of space, it would over time start to feel quite cold as you lose more and more heat. But it's far from the 'instafreeze' environment it's depicted in various media. But speaking of the sun, this is where it really starts to defy expectation. In space, you face the full, unfiltered radiation of the sun. The sensation of the sunlight without any cooler ambient temperature would feel akin to the sensation of sunlight in the Sahara desert (an extremely dry environment), plus unfiltered radiation in the ultraviolet spectrum will make the sensation even hotter and the dangers of sunburn far more immediately dangerous. In fact, the primary heat-related issue that had to be addressed for astronaut suits wasn't just keeping them warm in the coldness of space, but keeping them cool in the heat of the unfiltered sun. This applies to things like the space station and probes as well. Their electronics and processes create heat, which sometimes cannot be radiated out into the vacuum of space faster than the heat is being generated. This is referred to as "waste heat" (it applies to normal machinery here on Earth as well, but it's bigger problem in space due to the heat conduction issue) and is another consideration in designing vehicles, machinery, and electronics in space.
@IRLtv-br7yh6 жыл бұрын
2:50 I think having your mom there brought out some accent in you. The way you say "Read out" lol
@zouce3 жыл бұрын
I think I'm impressed with your patience more than the fact that you make these fun and watchable videos.
5 seconds in: "I thought I understood science, but I am utterly lost." 6 seconds in: "Ah... Heat conduction... Freaking Veritasium man." My life. ._.
@RigatoniModular8 жыл бұрын
Your mom looks so proud of you for doing all these videos!
@subrajeetmaharana4 жыл бұрын
Perception matters the most at the end of the day. Thanks dude.
@lolmoq3 жыл бұрын
2:40 oh boy these have become so common
@carlosthebeast276310 жыл бұрын
Paper doesn't absorb cold? LOLWHAT?
@immortalsunАй бұрын
It’s so funny how Derek suddenly gets his Australian accent back when he’s with his mum.
@moisesteliz39725 жыл бұрын
So question...im out side righg now its about 101 Fahrenheit...is the concrete and the plant out side the same temp then ?
@mkb64189 жыл бұрын
Yes, but the human brain is more interested in th amount of heat exchanged between body and the environment. It isn't interested about the temperature.
@hosmanadam9 жыл бұрын
Hey Derek, the cake and the tin are NOT the same temperature, for an entirely different reason than what you're demonstrating. The cake has water in it, so it can't heat above 100℃. All the water would have to turn into steam first. The surface can be slightly hotter because it's dry, but the close contact with the inside still keeps it around that point. Metal cookware has no such limitations. The reason your readings were so close is because you measured the surface of the cake and a part of the tin that was in direct contact with - and therefore cooled by - the cake. Had you measured the inside of the cake with a Thermapen for example, it would've been below or at 100℃. More importantly, measuring a part of the tin that's not in contact with the cake, such as a handle, could possibly have resulted in a much higher reading, up to the oven's set temperature. I respect your work tremendously and learned a lot from your videos, but I don't think this particular demonstration proves your point very well!
@lighthouse-lh3ci6 жыл бұрын
I think people would be touching the surface of the cake, though, and base their estimate of its temperature on that.
@dianaarrubla73316 жыл бұрын
Adam Hosman btw the water would of turned to steam by the time that the cake finished baking
@xXJeReMiAhXx996 жыл бұрын
haha out of all the smart asses here Adam you're the only one that got it right, I've looked at dozens of comments and they pretty much consist of people calling the ladies idiots and "humanity is doomed" when in fact the inside of an unburnt cake is indeed significantly cooler than the metal surrounding it.
@MMcfc15 жыл бұрын
My thermodynamics lecturer demonstrated the same concept using the wooden desk and metal railings!
@michaeld48612 жыл бұрын
Ruthless. Even sets up his own mother for that wicked burn. "I'm right, you're wrong. You gotta bake me another cake now."
@jadencm48627 жыл бұрын
Mind blown Didn't realize people still think cold exists.
@maximilianlindner8 жыл бұрын
Wow, some people... I am speechless!
@Heligoland3608 жыл бұрын
Yup, "Paper doesn't absorb cold!" I bet they thought they were smart, because they said a "sciencey" word like "absorb". -_-
@hamzabendi97517 жыл бұрын
They probably didn't have the opportunity to study thermodynamics. in quiet a lot of countries thermodynamics isn't taught until college, so if your major doesn't involve science you'll probably never learn smthg such as "thermoconductivity" and so can't answer his questions accurately. Point of my comment is: don't mock people :)
@Heligoland3607 жыл бұрын
Laurelindo It's not so much the lack of knowledge, it is more the general stupidity. Like laughing at a dog that runs into a lamppost.
@iaarsoismdiab76207 жыл бұрын
Max Lindner I know about thermodynamics. I am just 13 and have known about thermodynamics for years but I am a nerd.
@williammoody19117 жыл бұрын
Nah, it's other people being ignorant and not paying attention or remembering their science lessons from when they were at school. Mums specialise in making tasty cake; schoolkids specialise in remembering thermodynamics... :D
@damnit2585 жыл бұрын
it's great how u make these vids! indeed, it is all about the right definition of a thing and not what we think is the possible truth, it's truth vs possible truth.
@BR1C4209 жыл бұрын
A great way of demonstrating this is to use a nordic (finnish/swedish) sauna, the air can easily be in excess of 80c.
@Lightyin10 жыл бұрын
when that woman said that "paper doesn't absorb cold" I don't know how he didn't burst out laughing XD
@VIIflegias9 жыл бұрын
this is good comedy material. but to be fair i was confused by this same phoenomenon before i was properly introduced to the concept of heat transfer in...i don't remember which grade.
@DesertCookie4 жыл бұрын
In Germany that would be somewhere around year 6 to 8. Does this compare to wherever you are?
@olijackson38702 жыл бұрын
The Australian accent has really changed a lot in 10 years.
@albeil554 жыл бұрын
Everyone’s heard of “gotcha journalism”, but this is “gotcha science education”
@Tatti123219 жыл бұрын
People really don't know any science. Its boggling.
@30ousman9 жыл бұрын
those people actually helped us to learn something so stop insultig them
@pb40122 ай бұрын
The “I’ll take your word for it” lady is the reason I can’t be bothered to discuss/debate with most people. So many seem stubbornly ignorant yet arrogant.
@roy40282 жыл бұрын
I have an Ice box in my camper. I want to increase the thickness of the insulation. On the top and bottom I only have room for 1/2" more. Which one should I insulate?