Boiling faster in the cold?! ♨️🥶 #shorts #liquidnitrogen #scienceexperiment

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Tommy Technetium

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This is a perfect example of why in science it matters that "there is no such thing as cold, only an absence of heat" if you imagine heat is a liquid that flows between matter, then you can imagine the metal square as a large plate that doesn't hold liquid well, so even though it's large and you can just dump tons of liquid onto it, it quickly pours off onto nearby objects or even just evaporates into the air. But the wood is like a small sippy cup, even through it can't hold as much "liquid" at once, it can't pour it out as quickly so it doesn't heat things up very quickly at all.

EssaysInTheCommentsSection

To be fair it's that wood is a BETTER insulator and metal is a BETTER conductor. They are both able to insulate and conduct but they are both better at one and worse at the other. 😜 Love your videos, just being cheeky.

wylanvallotton

It's also the reason metal tends to feel "cold" compared to wooden things even tho they are likely, roughly, the same temperature.

NATESOR

I knew it was going to be a cold surface, and when you mentioned the temperature, I was RIGHT, I just totally forgot about material😅

MR-ALD

If he measured the temperature of both the surfaces before placing the glasses on them, they would have been same temperature. So it's not relative to the metal one being colder, it's just because (as explained at the end of the video) metal conducts heat way faster than wood. And that also explains why the metal is colder AFTER placing the glass on it.

marioeagle

And this is just one of MANY reasons I have always loved physics!

Carstuff

You should demonstrate gallium and aluminium if you haven't already (and then the lesser known reaction of that alloy with water)

ewanb

Can you make ice if you pour water into liquid nitrogen or will it just boil
The nitrogen

HenrySciortino

Wood is NOT an insulator. It may have a higher resistance to electrical current, but it's far from a true insulator. If you have doubts, it's easily proven. Lay out a piece of wood, drive a nail or screw part way into each end of the wood, attach a wire to each and hook the other ends into a circuit and close the circuit. You can watch the wood burn in a (somewhat) lightening pattern as it finds the path of least resistance between the poles. It's frequently used as an artistic expression and sometimes sold for decor. It's actually a pretty fun experiment. If you want an insulator, use ceramic, rubber or glass (although glass would be my last choice of the three due to having the lowest resistance

TonyM

I feel like I entered an altered reality where Peter Griffin is real and happens to be a scientist

lukstar

The thing is that, for liquid nitrogen, both plates are hot af. So, as the video said, the one that conducts heat best transfers energy better.

Deses

and the reason why the right one is colder, is because it conducts better and it poured all of its heat into the liquid nitrogen, which caused it to boil faster.

ThatJay

Both materials should be at room temperature regardless of the materials. Metal is a better thermal conductor.

ddee

Colour matters too. An engine painted black will run significantly cooler than a chrome plated one, to the point the chrome engine will require an oil cooler and potentially a bigger radiator. A black air to air intercooler will have cooler charge temperature than a raw aluminium one.

Also an infra red temperature probe is hardly the most accurate way to test temperature. It will do, but when working with electronics, I found that changes in PCB colour and chip / die reflectivity made it almost useless in some cases, compared to an old fashioned resistance probe.

Anyway, considering the engine and intercooler guff. It's worth mentioning that a black car will hear up significantly more than a white car when left out in the sun. Dark colours absorb heat more readily, and don't reflect as much of it away. But similarly to osmosis, heat wants to move from an area of high concentration to an area of low concentration (inaccurate statement for simplification purposes). The chrome / silver colouring on engine parts will reflect heat back into the object, the black colouring will absorb the heat from the object, but because the air around it is cooler, it will release it into the environment.

But what do I know, I'm just a mechanic banging wrenches together working on observations. I don't have any of those fancy bits of paper.

( ͡° ͜ʖ ͡°)

MrClassiccarenthusia

But it doesn't make sense for the metal to be colder than the wood, unless it hadn't heated up again from previous runs. They should both be at room temperature. But I guess the point is "even when it's colder, it transfers heat faster." And that was shown well enough.

Rwnds