Melting Ice Cube Riddle

  • Published on Dec 13, 2021
  • I talk about heat transfer and why ice cubes melt at different rates.
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  • Science & TechnologyScience & Technology

Comments • 287

  • Randa Ranatunga
    Randa Ranatunga 5 months ago +1781

    I love how the ice cube that wasn’t melting looked kinda like a badly photoshopped in ice cube.

  • Shiranai
    Shiranai 5 months ago +796

    I don't remember if it was a museum or something else, but I once was at a place that had an exhibition. There they had this contraption with two, intertwined copper coils. When you touched it, it felt like you got burned, so you pretty much let go by reflex. However if you decided to hold on you could feel that one coil was warm while the other cold.
    I thought that was pretty cool.

    • Joshua Boyd
      Joshua Boyd 2 months ago

      @Benjamin Gooch I love the exploratorium!

    • Mob Barley
      Mob Barley 5 months ago

      Ngl idk wtf that means

    • Only Gaming
      Only Gaming 5 months ago

      Thats cool i remember that happineing with everyday objects, you touch it thinking it hot an let go quickly but if you choose to hold on it usually doesn't burn

    • imdad ali
      imdad ali 5 months ago

      It was a museum that was my experiment which you thought was cool, thanks and glad u liked it🥰👍

    • Mimi Avali of the Magnus Institute
      Mimi Avali of the Magnus Institute 5 months ago


  • J T
    J T 5 months ago +125

    Your body does not feel hot or cold but "how fast heat it is transferring to the object you are touching". So the object that feels cold has a greater thermal conductivity and so is able to conduct heat better from the hot air or table to the ice cube, making its temperature rise much faster.

    • nicholas petros
      nicholas petros 5 months ago +5

      true, and conversely it takes the heat from your hand rapidly which makes it feel cold. silver has even better thermal conductivity, so if you take a piece of silver and hold it in your hand for a moment, it can cut through ice extremely rapidly until the ice absorbs all the heat from the silver

    • valkrieknights
      valkrieknights 5 months ago +3

      Was going to say that, but you said it much better.

  • M4A NOW
    M4A NOW 5 months ago +208

    Wooooow, I've never thought about your body sensing the rate of change of temperature instead of just temperature, that's a lightbulb moment right there. THANK YOU, I LOVE YOUR CHANNELS

    • Mpampari Mpampatzi
      Mpampari Mpampatzi 4 months ago

      thats actualy wrong

    • Farhan Ali
      Farhan Ali 4 months ago

      @Mortario1 yes but the ACTUAL receptors that detect it because their absolute temperature changes changing the conduction properties of the ion channels.

    • zach nies
      zach nies 5 months ago

      Your body detects either a loss of heat or gain in heat, which we interpret as either "cold" or "hot". As a general rule, when we touch something that feels cold, it means that we are touching something at a lower temperature than our body. However, this effect is exaggerated when you touch a conductor because your body is losing more heat more quickly. You use the term "rate of change in temperature" when the correct way to say it is "rate of heat loss" :) hope that helps in understanding

    • Mortario1
      Mortario1 5 months ago

      @Farhan Ali we do sense rate of change of temp, like when you touch metal you will feel its cold because the metal is absorbing heat from your hand quickly

    • Kevin Dasilva
      Kevin Dasilva 5 months ago +1

      I agree with your username 😁

  • Alagon
    Alagon 5 months ago +3

    I remember my parents telling me that when I felt the underside of the table (it had like metal supports) that it wasn't actually cold, because if it was, the room would heat it up, the thing that I was actually feeling was the metal, being better at siphoning energy from my hand, thus feeling cold, because I was getting colder

  • ATP-Ray
    ATP-Ray 5 months ago +1

    I loved it when my professor explain it, that to feel cold or hot, heat needs to flow into, or out of your finger. A conductor at room temperature would feel cold because heal will easily move from finger to metal, whereas wood will not feel cold because it is an insulator and heat won't flow.

  • TabooTheAwesomeness
    TabooTheAwesomeness 5 months ago +73

    My science teacher actually had us do this experiment. It was pretty fun.

  • DisneyfanBeckers
    DisneyfanBeckers 5 months ago +1

    This reminds me of a science experiment video I watched in a class where the compared surfaces were a metal baking tray and a piece of styrofoam. Same difference in feeling by hand, and same outcome when placing an ice cube on each surface.

  • Bruhn't
    Bruhn't 5 months ago +4

    Never seen an ice cube melt so fast

  • mama K
    mama K 5 months ago

    I ❤ these science shorts! Thanks for sharing & educating
    A+ 🤯😊

  • Sam
    Sam 5 months ago +58

    The body can sense both, absolute temperature and temperature change.. just hold your hand in warm water then slowly heat it up. You can't let it there until the water starts boiling. At around 50 degree you'll give up regardless of how slow it will be heated up.

    • soumyo
      soumyo 4 months ago

      @Jrockblam so a thermometer would tell me my absolute temperature but if some other human touches me it would feel the rate of temperature difference?

    • WungusBill
      WungusBill 5 months ago

      Not the rate of change of temperature of the material, but rather how quickly the material is transferring heat to your hand (or whatever it's touching). That's why you can sit in a sauna at 90C while 90C water will instantly give you bad burns, the water dumps heat into your skin much faster than the air.

    • 컹ग्रैچوலேшаνσ
      컹ग्रैچوலேшаνσ 5 months ago

      @Black That's not true. Insulators still have the temperature difference, they just don't exchange heat well. What your body feels is the exchange of heat, and if the object isn't transferring much heat to you, it won't feel hot even if it is at a high temperature.

    • 컹ग्रैچوலேшаνσ
      컹ग्रैچوலேшаνσ 5 months ago +1

      What he means is you can't sense the actual temperature of something external to your body, sure you can sense if your hand is at a high temperature, you can't accurately sense the temperatures of two different external objects with different conductivity though.

    • Sam
      Sam 5 months ago

      @Jrockblam Aw cmon i forgot the names of the biological stuff. So i can't really explain it anymore.
      But i know that there's not just one kind of 'things'... There's a mix of those 'things' which can throw signals for a sudden temperature change and those 'things' which can throw signals for a specific limit of temperature, usually a temperature well before the biological stuff starts to fall apart and before the biological stuff becomes critically inactive. And both 'things' will contribute to temperature feelings and pain, depending on their activity. So pain doesnt really exist on it's own. Its merely a placeholder for too many signals in a very short time.

  • Positive Vibes
    Positive Vibes 5 months ago +1

    Both are the exact same temperature. When I feel this one it’s cold and when I feel this one it’s warm.
    Mind blown.

  • Michael A
    Michael A 3 months ago

    The body sensing the rate of change of temperature honestly explains a lot

  • Josh E
    Josh E 5 months ago

    hearing that your body detects rate of change rather than absolute temperature actually makes some things make sense. Like how touching super cold things can feel like burning initially

  • Mehcoolbro
    Mehcoolbro 5 months ago +2

    I remember doing this experiment in science class

  • Tuvoca
    Tuvoca 5 months ago

    Thermal conductivity of aluminum (a metal) and catalytic action of the aluminum are the TWO factors.

  • Wayward Current
    Wayward Current 4 months ago

    I think this is the same reason that water in sea always feels colder than air, when in reality water is probably at even hotter temperature than air but water has better heat conductivity so it "drains" your body heat faster making it feel colder.

  • RedPandaMurphy
    RedPandaMurphy 5 months ago +1

    This is in relation to the specific heat capacity of an object right? Water has a high SHC being around 4180 kJ/kg/K whereas aluminium has a SHC of around 215 kJ/kg/K

  • Cxntrxl
    Cxntrxl 5 months ago +6

    Immediately knew it would be the cold one, if they’re the same temp, they’d only feel different due to heat dispersion
    Yaaay computer cooling nerd for the win

    • Man Overboard
      Man Overboard 5 months ago

      It would actually be the opposite way if the temperature was above 36,6

  • Miguel Borromeo
    Miguel Borromeo 5 months ago

    Put a book in a freezer and a similar sized steel pan. They'll be at the same temperature, but the book won't feel as cold. You can double check the temperature with a temperature probe

  • prog '
    prog ' 5 months ago +10

    Our brain only knows differential equations. Everything is converted to differential equations before getting solved.

    • Polly
      Polly 5 months ago

      I should've used that ability on my exams somehow

  • hsd287
    hsd287 5 months ago +3

    Oh so now I get it
    No wonder the aluminium foil is used to keep food warm 😂

    • soumyo
      soumyo 4 months ago

      Can you explain please

  • xXxSkyViperxXx
    xXxSkyViperxXx 4 months ago

    its the same idea when u cook a frog in a pan gradually as opposed to suddenly. it would leap out if it was sudden, but gradual, it wouldn't until it feels hurt already

  • Alex Kemplen
    Alex Kemplen 5 months ago

    I can't believe that I got it right first try! Man I feel like a genius

  • Sy
    Sy 5 months ago +95

    At the start, I thought he was holding a flip phone lol

    • Abigase
      Abigase 5 months ago +1

      Same, I thought it was a photo related experiment 🤣

  • aWESomness
    aWESomness 5 months ago +1

    This is like the only thing you have ever said on this channel that I actually already knew lol

  • BluFox185
    BluFox185 5 months ago

    My physical science teacher did that riddle and we all got it right lol

  • 33_M2_Rahul Krishna menon

    Thermal conductivity is high for the one who felt cold since it's conducts your body heat quickly making you actually and feel cooler while thr one that felt warm doesn't conduct your temperature as good hence your body stays warm as before and makes you feel warm

  • xx_ej.kogane.cosplay_xx

    We did this in my science class where one block was metal and one was plastic and we had to find out which on was the conductor and which one was the insulator. Plastic one is insulator and metal is the conductor.

  • Zer0Fukz
    Zer0Fukz 5 months ago

    So I'm assuming that because it was made out of aluminum that it gave off its heat to the ice cube using the laws of thermodynamics. And the plastic insulated the heat and retained it and didn't give it to the ice cube. But you didn't explain that. You kind of went on the side tangent but never actually explained what was happening.
    But I still love your videos keep up the good work

  • dadey Aki
    dadey Aki 5 months ago

    I remember last year, our 4th grade teacher showed this to us, and only a few people got it right, I was one of the smartest, still didn't get it, so yeah 🙃

  • Michael Fox
    Michael Fox 5 months ago +34

    Conductivity, not temperature is key.

    • Cam Alex
      Cam Alex 5 months ago

      You mean specific heat capacity

  • BloodRayne
    BloodRayne 5 months ago +6

    This is the same experiment my professor did when he taught us heat and thermodynamics

    • Leonhard Masche
      Leonhard Masche 5 months ago

      This is the same experiment Derek form veritasium did 7 years ago

  • AccurateJaney
    AccurateJaney 5 months ago

    My guess is that the first one is metal, and the second one is a different material like wood painted with a sealer

  • Rowan Snipes
    Rowan Snipes Month ago

    I remember doing this in my 6th grade science class

  • Tomás Gomes
    Tomás Gomes 5 months ago +1

    Feeling oddly proud for having figured it out before you explained it :')

  • KDluvR1999
    KDluvR1999 4 months ago

    I did this in 4th grade with my class. Thay knowledge stuck with me for years just because I got to experience it for myself. But if Im just reading it, I will not remember the how or the why 😂

  • patato patato
    patato patato 5 months ago +4

    my science teacher showed me this before we started learning about energy

    • Ahmad Neda
      Ahmad Neda 5 months ago

      What did you have to hold/touch?
      Was it warm?
      Was it something like potatoes?

  • Byron Avila
    Byron Avila 5 months ago +1

    I did that a few months ago in school it went good

  • C InfDef
    C InfDef 5 months ago

    We did this experiment in class to explain specific heat capacity

  • Samuel Ross
    Samuel Ross 5 months ago

    I actually already did this experiment in 1st quarter lol

  • Jay Wayne
    Jay Wayne 5 months ago +1

    Kyle Hill has been saying this for a while I love the shower matt example he uses

  • Zdrange03
    Zdrange03 5 months ago

    But melting and feeling warm are the same thing: transfer of energy to the ice cube or to the hand. Why wouldn't the ice cube melt then or conversely the pad feel temperatureless?

    • Razer
      Razer 5 months ago +3

      the plates are room temperature. your body is above room temperature. the aluminum plate feels cold because it has higher thermal conductivity, which means it wants to sap your heat and equalize temperature with you when you touch it. the plastic has low thermal conductivity, so your body doesn't lose heat when you touch it.
      same for the ice, which is below room temperature. the aluminum with high thermal conductivity is willing to transfer heat energy to the ice. the plastic plate does not readily transfer it's heat energy, so the ice cube melts slower.

  • Henry Schnelle
    Henry Schnelle 5 months ago +1

    The cold one disapates heat while the warm one insulates

  • cant exist
    cant exist 5 months ago

    "doesn't sense temperature but senses the rate of change in temperature"
    is that why you don't feel heat from a candle immediately?

  • Elle van Veelen
    Elle van Veelen 5 months ago +1

    Look at it this way: the aluminium felt cold because it was sapping warmth from your skin. It'll do the same with the ice cube.

    • Bqmbi
      Bqmbi 5 months ago

      No because by your analogy it would be sapping the warmth from the ice cube keeping the ice cube cold

  • ppmghee
    ppmghee 5 months ago

    Lmao I did this same thing in science class 2 weeks ago

  • Frostburn Spirit
    Frostburn Spirit 4 months ago

    I figured it out immediately lol

  • Naas van Rooyen
    Naas van Rooyen 5 months ago

    You said the aluminum feels cold. I think you mixed them up. The aluminum should feel warm

  • Crispyleaafs
    Crispyleaafs 4 months ago

    Lmao I did this exact thing at the beginning of school with that same stuff

  • PurpleMaggot
    PurpleMaggot 5 months ago +5

    "Your body doesn't sense temperature, it just senses the rate of change of temperature"
    So...if you burn to death over an extended period... would you eventually not "feel" the heat? I don't know if that's relieving or terrifying. Preferably I just don't burn to death.

    • Man Overboard
      Man Overboard 5 months ago

      Nope you would feel it as soon as your body temperature is higher than normal. This guy is simply completely wrong

  • Roaching
    Roaching 5 months ago

    My teacher showed me this back when I was in 5th grade super cool

  • Gispee
    Gispee 5 months ago

    i remember doing this experiment in 8th grade science

  • Darío Burstin
    Darío Burstin 5 months ago

    That's the same reason why you can walk barefoot in the wooden floor of a sauna that if at 100° Celsius, but you can't put your hand on a bowl of water or hold a piece of metal that is at the same temperature.

  • JoHn AnToNy^_^
    JoHn AnToNy^_^ 5 months ago +5


  • Toma
    Toma 5 months ago

    its like the same thing woth chocolate. when you put chocolate in the FREEZER it melts faster when you take it out as opposed to when you put it in the normal part of the fridge it doesnt melt as fast

  • boriz
    boriz 5 months ago

    The moment you realize your body is doing Calculus but your brain struggles with it.

  • Priyanshu
    Priyanshu 5 months ago +1

    Hmm damn I never knew that we sense change of temp✨ thnx for actual knowledge

  • Searotu
    Searotu 5 months ago

    Woah the only experiment on this channel that i knew what was going on before the explanation

  • Oracle624
    Oracle624 5 months ago

    In science we did this and pair, idk got some candy. Tried to use my metal sharpener cuz ik aluminum and that can transfer heat and cold melting it faster. Kids started cuping it around their hands blowing but my sharpener was to small. I took my waterbottle smashed it into a snowy powder and it melted in seconds after. Won me and my partner some candy

  • Man Overboard
    Man Overboard 5 months ago

    The riddle would make sense if you provide the actual temperature instead of just stating that "they have exact same temperature". If the temperature was above 36.6, the result would be the opposite

  • PrinceCuddles
    PrinceCuddles 5 months ago

    Imagine if you had a plate made out of copper that shit would of melted super fast.

  • Ben Altair
    Ben Altair 5 months ago

    The one that's colder right? Because it's conducting heat (same reason ice feels cold)

  • Frank Reading
    Frank Reading 5 months ago +16

    Your body doesn't detect the rate of change of temperature. It detects the temperature of it's own nerve cells, which are beneath the skin.
    What you're really inferring is thermal gradient. You know something is hot because you feel your skin get hot, but if it's hot enough it will have already transferred enough heat to cause a burn before your body even knows it.

    • Dimitrije Krstić
      Dimitrije Krstić 5 months ago +3

      Lmao. Your body actually does detect the rate of change of temperature, and we perceive it as something being colder/warmer than us depending on the ambient temperature. Metal will feel colder than other materials most of the time, even when it's the same temperature. Why? Because it's conducting heat faster. Away or to your hand. So yeah, your body detects exactly the thing you said it doesn't.

  • lol
    lol 5 months ago

    Thermal conductivity if u put ice on a thermal processor it will melt instantly because of the conductivity

  • I Drink and I Know Things

    It would do the same thing if the Plastic pice were to be wood.
    I call it Energy transfer.

  • Mr. Potato
    Mr. Potato 5 months ago +1

    I did this experiment in my 8th grade science class

  • firstname :D
    firstname :D 4 months ago +1

    I thought heat conductivity as well.

  • Upgrade 101
    Upgrade 101 5 months ago +1

    I like how fruity this cup cake is

  • Demoman
    Demoman 5 months ago +1

    Maybe this is why the lady on Hell’s Kitchen thought cold water boiled faster than warm water…

  • samuel Jones
    samuel Jones 5 months ago

    It should have been silver instead of aluminum.

    FAISAL ITX 5 months ago

    I want ActionLab classes for chemistry and physics and Law by Mike for my Law classes

  • tomsterBG
    tomsterBG 5 months ago

    OOH! So this is why the frog boiling paradox is possible? Sensing the rate of temperature change doesn't make much sense to me tbh, why is that a thing?

  • Sudstan 02
    Sudstan 02 5 months ago

    The one cold is prolly metal so melts easier

  • hive
    hive 5 months ago

    Haha I already knew because I did that in science class

  • The Big Evil
    The Big Evil 5 months ago

    Remember kids, the feeling of cold is something stealing your energy. The feeling of heat is you stealing energy.

    • Man Overboard
      Man Overboard 5 months ago

      Both materials steal energy in this scenario though (at different rates)

  • Brian Fox
    Brian Fox 5 months ago

    The one that feels cold does so because it transfers heat better

  • LukZrO
    LukZrO 5 months ago

    My teacher did this absolutely blew myind

  • M D
    M D 5 months ago +1

    "...your body senses the rate of change of temperature..."
    Pretty sure that's WRONG. Highly misleading at best, and id even say outright false in the way you are implying it. Your body feels the temperature of itself, not the surface you're touching. The surface you're touching only matters in how it transfers heat to or from your skin to change its temperature. Touching metal (that's of a different temperature than your skin) will rapidly conduct heat to or away from your skin and will change the temperature of your skin faster. You're not "sensing the rate of change", your just getting to a different sensible temperature faster.
    Touch the 130 degree silicone for long enough and it will burn you. It will just take a long time to get to that temperature because of the slow transfer of heat to your skin.

  • Dtr146
    Dtr146 5 months ago

    When something feels cold it's because it's sucking the heat out of whatever body part is touching it.

  • Unsaid_Magnite
    Unsaid_Magnite 5 months ago


  • Smith
    Smith 5 months ago

    lol love the "riddle"

  • Cult Boy
    Cult Boy 5 months ago

    Is this a form of human superpower? We don’t get burned by non-conductive heat?

  • Ncbonnie Animations
    Ncbonnie Animations 4 months ago

    I did this in science once

  • Alliyah
    Alliyah 5 months ago

    Idk Why I Thought That Thermometer Was An Old School Nokia Brick 🤣🤣

  • The SpicyDiamond
    The SpicyDiamond 5 months ago +1

    Lol I learned this in science in grade 6

  • DipsticksOfficial
    DipsticksOfficial 5 months ago +1

    Dude what... "The human body doesn't sense temperature, it just senses the rate of change of temperature" ??? You can't just throw that at the very end of the video!! And that can't be true. Someone help.

  • Roger Onslow
    Roger Onslow 5 months ago +1

    Very "Insulative"? I must add that word to my technical dictionary.

  • Jens Christian Tvilum
    Jens Christian Tvilum 5 months ago

    What was the first made from?

  • Joe Novella
    Joe Novella 5 months ago

    Your hand feels the conductivity.

  • TruMancow
    TruMancow 5 months ago

    Idk if you've already put water in your air compression chamber doo bap thingy but I wanna see what happens when you suck the oxygen from the water does it just make hydrogen or does something else interesting happen?
    Edit:oh its the vacuum chamber lol

  • Shiki
    Shiki 5 months ago

    Nothing is cold, heat is being absorbed. My brain hurts

  • T C
    T C 5 months ago

    This is why if you are air thawing some meat, you put it in a melt bowl or baking sheet vs something plastic or ceramic...

  • Pennywoke
    Pennywoke 5 months ago

    I literally did this last year in school for 6th grade

  • Doltramir Sires
    Doltramir Sires 5 months ago +1

    Yea. And now make their temperature higher that your hand's and it will be the opposite. It will become intuitive.

  • Chris Register
    Chris Register 5 months ago

    Our body senses heat transfer, not rate of change of temperature. These are different, e.g. for things with different specific heat

  • MisterJaaye
    MisterJaaye 5 months ago

    I was hoping youd ask the comments for an answer. I had actually seen this one before

  • Th3 GamingBird
    Th3 GamingBird 5 months ago +1

    I think the heat of the ice cube rises cuz of the cold one 🤔

  • Jenifer Palghamol
    Jenifer Palghamol 5 months ago +1

    Love your vids

  • Juppie902
    Juppie902 5 months ago

    Body doesnt sense temperature
    Preheat hands in oven
    Touch warm engine oil and hot parts