Does it have anything to do with the the pressures applied by the wires? Since copper is more dense and the wires are of the same thickness, I would think that that copper and weighed more. More weight over the same area means slightly more pressure applied by the copper. That's why I guessed the copper would win, but I'm not actually sure if more pressure has a real effect.
I would love to see a video that explains why does some water (cold) "filters" through the glass that holds it (Everyone has seen it.. from Coca-Cola to Orange Juice) ... (Cold, and maybe frozen)
@tuto193 Um, I don't think the drink "filters" through the glass. The glass is just quite cold so water vapor from the air condenses onto it, making it wet.
Hi Derek! We're currently experimenting on this with copper/steel/nylon.
We had a block of ice roughly the same size as that you used in this video.
The steel wire, with two 5-kg weights attached, crossed the block in 10 minutes in the classroom. The experiment could be repeated in front of many groups. ...
... BUT, put outside (temperature are now below freezing here), it seems it would not go through the ice in less than a couple of hours (it was the end of the day and we had to go home).
As temperatures are supposed to stay negative for another couple of days, we will experiment again outside and let you know the results.
@ParbelleCondorcet Excellent work! I think I was using 30 gauge wire. It did take some hours for the wire to pass through. Also I'm told the pressure effect works mainly above -3C so I hope it's not too cold where you are.
@1veritasium We do not have a Siberian winter in central France ! Temps are around -5°C until the beginning of next week. I have done this experiment many times over the years and what is important is to have a "warm" block of ice, ideally 0°C, as you need 140 bars of pressure to decrease the melting point by 1°C, which can explain the -3°C limit you are mentioning. Ice out of a standard -18°C freezer will be extremely hard to slice
But what about water that is under pressure? Does it not freeze as fast as water that is not under pressure? I had an issue with a well a while back and I had to run an external water line that was above ground. It was in the middle of winter and I was afraid it would freeze, but it didn't (temp fell to about 25 degrees overnight). Was this why it didn't freeze, or did I just get lucky? The line had about 50 lbs. of pressure.
@FailDrummer because the structure of the molecules in water is more mobile than in the state of ice as the water frezes they molecules lose their kinetic energy that energy is then released to the enviorment as heat!
I think it's just as likely that the thermal conductivity of the copper wire allowed the wire to act as a "heat sink" (or cold sink in this case), effectively warming up the inside of the wire by absorbing the warmer temps of the wire not inside the ice. I am probably messing up some terminology here, it may be that it's actually that the coolness of the wire is dissipating via the exposed wire, but the end result is the same.
Very nice video, interesting theory, I very much like that there's a short video forcing you to commit to an answer, and that I don't have to go back and click a different answer to see a different video
@jonkuh haha so you had to commit to an answer before seeing what happened. Studies have shown that demonstrations with predictions are much more effective for learning.
I'm nto convinced that a single trial is enough to determine this. I think you need to do this quite a few more times, the two wires seemed pretty close. I don't think your explanation works because the refreezing seems like it is either adiabatic (if its very fast) or isothermal. If its adiabatic then no heat is exchanged, and if its isothermal then the water actually takes IN heat because it is expanding. This is then reversed; it has to give off heat to make ice but by how much?
@Anytus2007 Obviously if he were trying to make this determination for some important scientific gain more than one trial would be necessary, but it's an experiment for an educational video. Also, the copper wire had to start all over, and still beat the fishing line by quite a bit.
I'm nto convinced that a single trial is enough to determine this. I think you need to do this quite a few more times, the two wires seemed pretty close. I don't think your explanation works because the refreezing seems like it is either adiabatic (if its very fast) or isothermal. If its adiabatic then no heat is exchanged, and if its isothermal then the water actually takes IN heat because it is expanding as it turns into ice. The water loses potential energy, but gains kinetic energy (heat).
What temperature was it outside? I'm wondering if the copper wire could have also conducted small amounts of heat from the outside air, while the fishing line wouldn't, and if that could have also assisted.
How come the ice where the regelation occurs is more opaque than the rest of the ice (or should I say translucent)?
LRFLEW 6 days ago
Does it have anything to do with the the pressures applied by the wires? Since copper is more dense and the wires are of the same thickness, I would think that that copper and weighed more. More weight over the same area means slightly more pressure applied by the copper. That's why I guessed the copper would win, but I'm not actually sure if more pressure has a real effect.
jonesmm3 1 week ago
Yah dude you always look either SUPER tired or baked.. I unno which.
modrnlol 1 week ago
Canucks!!!
Shehaaz 1 week ago
i live in Florida...
orbitalshawn 1 week ago
I HATE LIVING IN VIRGINIA; THERE IS HARDLY ANY SNOW.
I wish I was still up in Connecticut!! :'(
I miss going outside and playing in the snow like it was my own world... I can't do that in Virginia...
TheBetterGamer 1 week ago
I would love to see a video that explains why does some water (cold) "filters" through the glass that holds it (Everyone has seen it.. from Coca-Cola to Orange Juice) ... (Cold, and maybe frozen)
tuto193 1 week ago
@tuto193 Um, I don't think the drink "filters" through the glass. The glass is just quite cold so water vapor from the air condenses onto it, making it wet.
1veritasium 1 week ago 11
@1veritasium thank you very much, Sir. n_n
tuto193 1 week ago
@tuto193 WOW...
ApertureCombine 6 days ago
@tuto193 Are you serious?
topas12345 1 day ago
This is by far the best channel I am subscribed too. Love your work Derek.
LOVEHATE121 1 week ago
Yay! :D I chose copper-
Overrice 2 weeks ago
why are you whispering
hatgrass 3 weeks ago
@hatgrass He said its 1:00 am
UnLokoLoquendero 3 weeks ago
Is this how ice skating works?
DrunkenCellist 3 weeks ago
Hi Derek! We're currently experimenting on this with copper/steel/nylon.
We had a block of ice roughly the same size as that you used in this video.
The steel wire, with two 5-kg weights attached, crossed the block in 10 minutes in the classroom. The experiment could be repeated in front of many groups. ...
ParbelleCondorcet 3 weeks ago
... BUT, put outside (temperature are now below freezing here), it seems it would not go through the ice in less than a couple of hours (it was the end of the day and we had to go home).
As temperatures are supposed to stay negative for another couple of days, we will experiment again outside and let you know the results.
ParbelleCondorcet 3 weeks ago
@ParbelleCondorcet Excellent work! I think I was using 30 gauge wire. It did take some hours for the wire to pass through. Also I'm told the pressure effect works mainly above -3C so I hope it's not too cold where you are.
1veritasium 3 weeks ago
@1veritasium We do not have a Siberian winter in central France ! Temps are around -5°C until the beginning of next week. I have done this experiment many times over the years and what is important is to have a "warm" block of ice, ideally 0°C, as you need 140 bars of pressure to decrease the melting point by 1°C, which can explain the -3°C limit you are mentioning. Ice out of a standard -18°C freezer will be extremely hard to slice
ParbelleCondorcet 3 weeks ago
I had figured that the thermal conductivity would be negligible.
I guess I figured wrong.
TheCaphits 1 month ago
I knew someone who threw a snowball so hard it ripped a hole in the siding of a house.
TheCaphits 1 month ago
This has been flagged as spam show
“This comment has been censored due to violation of SOPA.”
DaniRockandFire 1 month ago
@hgeorgehful Thanks man. Perfect explanation.
FailDrummer 2 months ago
But what about water that is under pressure? Does it not freeze as fast as water that is not under pressure? I had an issue with a well a while back and I had to run an external water line that was above ground. It was in the middle of winter and I was afraid it would freeze, but it didn't (temp fell to about 25 degrees overnight). Was this why it didn't freeze, or did I just get lucky? The line had about 50 lbs. of pressure.
1965cyclone39 2 months ago
man am I glad Ive subscribed!
juanpjp27 2 months ago
Any 1 knows why it generates heat while it refreezes?
FailDrummer 2 months ago
@FailDrummer because the structure of the molecules in water is more mobile than in the state of ice as the water frezes they molecules lose their kinetic energy that energy is then released to the enviorment as heat!
hgeorgehful 2 months ago
You woke up at middle of the night:D You make anything for science:D
You were speaking softly, your eyes were sleepy, and your face had pillow marks:D
FailDrummer 2 months ago
Your videos are amazing dude...
DimitrisMPapadakis 2 months ago
I said thermal conductivity 3 seconds before you did lol
BerriesMcGOO 3 months ago
damn you totally scared me at 0:47 :S
hasantariq123 3 months ago
that song.... I've heard it somewhere before.....
on an other scientific show.... maybe even on this one.haha
unkebekwa 4 months ago
Aw heeeeeeeelll yeah. Next snow ball fight, my opponent is going DOWN
dlghwns 4 months ago
Whats the song? So chilled~
jsnpark 4 months ago
I think it's just as likely that the thermal conductivity of the copper wire allowed the wire to act as a "heat sink" (or cold sink in this case), effectively warming up the inside of the wire by absorbing the warmer temps of the wire not inside the ice. I am probably messing up some terminology here, it may be that it's actually that the coolness of the wire is dissipating via the exposed wire, but the end result is the same.
jwhannell 4 months ago
I'm supposed to do an homework... SCREW IT!
gabygabi007 5 months ago
I always thought it was the heat from the wire and friction that cuts the ice...
I didnt imagine it would freeze back tho..
notfree25 5 months ago
0:48 scared the fucking shit out of me. Ass.
bwakiscool 5 months ago in playlist More videos from 1veritasium
i love your videos!
Jackrules31 5 months ago
I guessed copper =) Had no idea about the science behind it though =P
MrSeedyROM 5 months ago
Why does refreshing generate heat/thermal energy?
nabil1030 6 months ago
Very nice video, interesting theory, I very much like that there's a short video forcing you to commit to an answer, and that I don't have to go back and click a different answer to see a different video
ice7771 6 months ago
I'm wrong...as usual
Arghira 6 months ago
why were there three annotations if they all lead to the same video?
jonkuh 6 months ago 4
@jonkuh haha so you had to commit to an answer before seeing what happened. Studies have shown that demonstrations with predictions are much more effective for learning.
1veritasium 6 months ago 66
@1veritasium Which additionally means @jonkuh would have been more effective at learning that fact purely by having a punt and asking the question
schr4nz 4 months ago
i want a song !
loserfaceliang 6 months ago
i wish i could have snow fights in my country... but it never snows here
ShamelessMCRFan 6 months ago
i thank Vsauce for you
jongmagee 6 months ago 4
I'm nto convinced that a single trial is enough to determine this. I think you need to do this quite a few more times, the two wires seemed pretty close. I don't think your explanation works because the refreezing seems like it is either adiabatic (if its very fast) or isothermal. If its adiabatic then no heat is exchanged, and if its isothermal then the water actually takes IN heat because it is expanding. This is then reversed; it has to give off heat to make ice but by how much?
Anytus2007 6 months ago
@Anytus2007 Obviously if he were trying to make this determination for some important scientific gain more than one trial would be necessary, but it's an experiment for an educational video. Also, the copper wire had to start all over, and still beat the fishing line by quite a bit.
DunkRyan 6 months ago
I'm nto convinced that a single trial is enough to determine this. I think you need to do this quite a few more times, the two wires seemed pretty close. I don't think your explanation works because the refreezing seems like it is either adiabatic (if its very fast) or isothermal. If its adiabatic then no heat is exchanged, and if its isothermal then the water actually takes IN heat because it is expanding as it turns into ice. The water loses potential energy, but gains kinetic energy (heat).
Anytus2007 6 months ago
That's awesome. Can you do more experiments like this?
zxcasdqwez3 6 months ago
I think if i didn't watch your videos, i would never have known these things :)
the bgm is great too!
mswishuponastar29 6 months ago
What temperature was it outside? I'm wondering if the copper wire could have also conducted small amounts of heat from the outside air, while the fishing line wouldn't, and if that could have also assisted.
ExTheremintal 6 months ago
The video about comparing temperature really came in handy with this one
RozenWe 6 months ago
awesome interactive video! :)
whens the you cant always get what u want video comming out? :P
JTK12893 6 months ago
you need some sleep lol
zangertime 6 months ago 94
i was right "win"
wtfjames2 6 months ago 19