Does Pressure Melt Ice?

[hand]

He's talking quieter to not wake up and melt the ice

[Rocksteady]

I was expecting a pressure chamber of some sort..

[lunashi_e]

You knew it was good when the thumbnail says "Rege"

[bretterry]

I would love to see Veritaseum revisit this concept in greater detail. There are some flaws that cast doubt on the design of the experiment. The argument against it is that regelation is possible, but requires much more pressure than this experiment provides. The wire is transferring heat from the room into the ice to melt it, and it refreezes due to contact with the remaining ice. In order to see if this is really what is happening, you would need to repeat the experiment in an environment where this wasn't a factor. You could take all the materials into a walk-in freezer and cool them to just below 0° C and see if it still works.

[zachhansen]

Is the water freezing again because of the release in pressure? Or just because it is still in contact with the ice around it? I'd like to see ice pressurized completely into water (keeping the same temperature to pressure ratio) and then freeze again after the pressure is released. I don't feel like I've seen this happen here, which I think you were getting at.

[microz]

No one:


Veritasium thumbnail 8 years ago:
*REGE*

[FriendlyHugo]

I'm afraid that isn't convincing, as other commenters have pointed out: an example of an alternative hypothesis is thermal conductivity leading to both the melting and the refreezing. 0:35 is the problem: it's warmer than 0 degrees.

I think if the whole experiment is conducted in sub-zero conditions, it would rule out the possibility of the melting happening due to thermal conductivity.

[ToMeTheFool]

That's a glitch. God will fix that in the next update.

[Saberwulfy]

It looks like this to me:
The wire is transferring heat better, the water freezes again because it is between two surfaces <0º.

[MD-ntnv]

Love the “wait that didn’t sound right” look he have after mentioning the “g-string” and says, "...and that's important" 0:15 Lol!

[forrestberg]

Idk if I’m convinced that the wire wasn’t allowing for conductive heat transfer, and the water was simply refreezing behind the wire because of the mass of ice. Very beautiful experiment (would be interested to see how you got a block so big and so clear), but I’d be interested in another regalation video!

[EmdrGreg]

Since it's warmer than zero degrees, we can't be sure that the melting is not caused by heat conducted through the wire, can we?

[david]

Imagine if we let YouTube send out birthday party invites, all our guests be showing up 8 years late

[AtheistEve]

Everything needs to be at ice temperature: room, block and string.

[Scorpac]

Theres a difference between setting a whole block under pressure and completely melting it, then removing the pressure and having it freeze again - compared to slicing through a block with a wire and having the surrounding ice freezing the water to ice again.... just saying.

[alfi]

veritasium: "i chose the e-string because it's much more thinner than the g-string, and that's important."

me: "what"

veritasium: "what"

[Fumas]

YouTube 10 years later: OK - time to recommend this now.

[TheBraverTuna]

Dude I love how straight to the point this was, I clicked to see something and I didn’t get some 20 minute video of how this idea popped into your head just last week. Just boom here it is. 10/10

[saisatya]

It just reminded the talks with my dad :) it was nearly 20years ago . He described the same experiment when I was kid. That experiment was done by his professors and he talked the physics.
Lots of love for you Veretasiam it brings those sweet memories that I had with my dad. My dad used to discuss all science stuff during my schooling. loads of knowledge

[ZacharyD]

Wouldn't the ice be melting faster where the wire is because it disperses heat faster?