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.
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.
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?
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.
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.
@@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
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 😂
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?
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 RU-vid and you'll be able to see why he does it this way.
+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.
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.
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.
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.
@@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
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
***** 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.
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.
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._
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.
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?
PenguinCoalition yep.... The the stupidity of people hurts my head everyday. Sadly they outnumber the smart people and they're still allowed to vote 😏🔫
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.
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".
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.
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.
@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.
3:17 I love how your mother looks at you feeling very proud, even though you've just started your RU-vid career. Can't imagine how happy and proud she feels now.
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.
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"
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.
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.
@@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.
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.
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.
The saddest thing is how pretentious you commenters are. Their responses are what you would intuitively think. In no way is an intuitive answer a dumb answer: it's just a wrong one. A stupid answer would be one in which the hypothesis was observationally unfounded, such as guessing that the cake was hotter than the metal.
+TheLogmp Well, it shouldn't be intuitive. Because that's basic physics they teach in school. But looks like it is either there are loads of people who never paid attention to their studies, or there is not enough exact science material included into Australian education program.
+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
@@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.
@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.
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. :)
I'm losing faith in humanity listening to these people. Three people is not representative, but I can't help but wonder if they represent the norm in your place - I hope not!
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
+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.
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.
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."
true statement and i didnt know our skin didn't feel the temperature when it was the nerves or something but well if you put a paper in the frezzer its going to get cold it was just so obvious i couldnt not laugh
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.
A lot of people facepalming about "Paper doesn't absorb cold" when she's not wrong. Yes from a scientific pov it's not 100% accurate since "cold" isn't a thing that can be absorbed. However, it is, in fact, harder to cool the book than the metal hard drive, hence "paper doesn't absorb cold", is a good description. For someone who is not a science nerd like most people watching (including me), she has an intuitive understanding of thermodynamics.
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.
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.
I have a digital thermometer that measures temps way above 500 Degrees Fahrenheit....not sure what kind of a meat thermometer you were using where it's limited to a max temperature like that!
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]
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 :)
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
Q=MC delta T, so how are they the same temperature if the C is different. The deltaT would be different between the 2 objects. The reason why the cake and tin was the same is because they reached thermal equilibrium but idk I’m 14 can someone correct me
Two problems with using an Infrared thermometer, you are measuring the steam coming off the surface of the cake, and the difference in reflectivity between the cake and the metal pan affects the emissivity of Infrared waves.
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!
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.
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.
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.
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
I think the difference is much more significant with the air in the oven being the same temperature but not burning you. The same with water vapor and boiling water. Same temperature but the water will burn you and the vapor won't.
Okay so I was working outdoors and I touched a piece black granite. It was burning hot and luckily I had my probe thermometer with me. I measured the temperature of the granite and it was around 70°C while outdoors that day was 40°C. How does that happen ?
Alex Wong I suspect the huge amount of force delivered to the face from the palm of the hand was so great, it pushed the whole head backwards, breaking the neck that the head was attached to.
