@Chirigami hot or cold are words we use to describe the amount of thermal energy in things. Cold is just the state of having relatively lower thermal energy (heat). In space, since there's a lack of physical bodies to hold any of this energy, it is in fact very "cold".
@jlhagad But, I've heard millions of times that actually the problem in space is COOLING things down, precisely because there's nothing to transfer the thermal energy. Heat can only be transferred through direct contact or radiation, but radiation has terribly slow transfer rates, so normally spacecraft remains with the same high thermal energy when it left our atmosphere (which is to say, the kinetic energy of each of its particles) until it finally arrives at some planet (if so).
@jlhagad I read about radiation and actually it's faster than I originally thought! So yeah, without any source of radiation (such as a nearby star) it would probably get to around 3K in a few hours or so. :P So it's okay after all, sorry for my misinterpretation.
@Chirigami Vacuum has no classical "temperature", but it still allows EM rays to exchange the heat between the system and the enviroment. So imagine what would happen to a piece of metal in this chamber if there weren't any cooling devices. It would exchange heat with the rest of the world, using rays. But if we surround it with cooling devices, the piece gives more rays than it receives, and it cools down to the temperature of the cooler, entering a new,lower equilibrium.
Wasn't he the ninth Doctor? Sounds like him but with that mask I can't say for sure. Interesting that he picked up science after acting since he played a science based character.
@gummel82 After few days, similar to mummy. The tissue would freeze in a couple of hours, and the volatiles like water would sublime. It's essentially freeze-drying. Check it on Wikipedia.
@BurtonRGA7 what I mean is that 1bar pressure isn't that high for devices that are designed to withstand pressure. that railcar isn't designed to withstand the pressure so it implodes.
assuming the door is 4.5m in diameter the force on the door would be 1.4 million newton. so the door needs to hold 142 tons.. ok that IS a lot
@BurtonRGA7 No, it means 760 mm Hg lower than atmospheric pressure, which is roughly around that point. So it's effectively around 0 mm Hg. Few milimeters don't mean a thing for such experiments.
in german speaking countries (the video of that railcar is from germany) we dont use the unit mm Hg for pressure. we use bar or pascal.
and a differential pressure of 0.76 bar MEANS 0.76 bar below atmospheric pressure (dont mix up differential pressure and absolute pressure). so the absolute pressure inside the railcar must have been 0.24 bar, which is a pretty good vacuum, but still possible...
@BurtonRGA7 Nobody uses mm Hg anymore... officially. But I'm interested, what railcar are you talking about?
I was reffering to the pressure inside the chamber in the video. If it's "760 mmHg lower than atmospheric pressure" then it means "roughly vacuum". Number 760 is a special number when talking about pressures and it always means either atmospheric pressure or vacuum. It can't be a coincidence. I hardly doubt it was 0.76 bar.
@TheWejdin They test space suits in pressure chambers without people in them. with people in them, they test them underwater in massive training pools.
@aluisious Well not get rid of gravity but cancel it out with a magnetic force, I've seen vids of floating strawberries and frogs in a magnetic field here on Earth, unfortunately did that take quite a big magnet to achieve that result (it probably wouldn't be feasible to get something like a satellite or whatever to float since it's far too heavy though :O).
@nc17atnce101 Space sure is a very hostile environment, there's the challenge of thermal management for electronics explained here. Detectors in some space telescopes must be colder than space itself for them to see, so there is a challenge to insulate them from the rest of the vehicle. Mechanical fasteners screws and bolts get stuck and wont budge, metal becomes brittle. Space suits for moon walks & EVA are 200C sun side and minus 200C shade side. Yeah, its spooky out there.
@trespire Yes, it's very hostile environment, but space suits never reach such temperatures. People inside would die. That's why those suits are from special materials painted white.
Surface of the Moon will reach 200 °C because it's very dark and has very low thermal conductivity.
The temperature of space is about 3 Kelvin though, so is going down to 77 K enough? Liquid helium is a good bit more expensive though :P I never thought about the potential for things to overheat in space, fascinating. Lastly, I am amazed that the door is held shut with merely a C-clamp...
"Of course we can't get rid of the gravity, If we could do that I would've patented that and made my millions long time ago."
I find this sarcarm rather disturbing Mr. Paul Eccleston, shame on you if you think this way, Science is not about money, Science is above everything, is above political,monetary or religious matters.If what you search is money and fame, you are searching in the wrong place.
@BackstageScience Trolling?!? Why does everytime I post a comment on your videos you think I'm trolling Brady?
Maybe its my salty lack of humor, maybe its why. But you know what, don't be alarmed. No reason to block me or anything.I am a subscriber for almost 2 years and I won't comment on any video anymore okay?
Jeesus, its just a coment It's like It's gonna be all over the newspapers next morning.
@Draxis32 It doesn't really have anything to do with trolling......the problem is, you just turned an enjoyable situation/video into a rather depressing one........all over a joke.
@creedofdeath9909 Even if he wasn't joking, I would still be more than happy for him to invent an anti-gravity chamber. And to reap the rewards. It would be far better for a scientist to have that kind of money than a corporate head or CEO.
How is the seal created between the access doors and the main body of the chamber? And if there is a vacuum leak how do you do about locating the exact point, do you use a Helium sniffer?
@coldlogic1 Through blackbody radiation. Practically all matter radiates energy in the form of electromagnetic radiation. Some of this radiation is blatantly obvious to humans, such as the sun radiating visible light because it is so hot, but all matter radiates in some way. Humans and other mammals, for example, do a lot of radiating in the infrared. That's what infrared and thermal cameras detect. This is b/c electrons are bumped up an energy level and then emit a photon as they fall back
@PBDPBD i knew that, but i always thought it wouldnt radiate enough energy away and heat would build up, what i really ment was, what methods do space craft use to radiate that heat away? call me boreing but i find it interesting even the chemical coolents used to cool space suits.
@fossil98 The temperature in space is influenced by radiation not by conduction via particles. Temperature in space is a BIG problem because the only way to get rid of heat of a spacecraft is to radiate it away.
A lot of electronic devices do not work in space because they overheat in the absence of air.
@Morkvonork That is not particularly true. Thermal management is a concern, but is generally quite manageable. It isn't that parts don't work. It's that they don't work in a particular thermal budget. It's all about how you use your parts and what your goal is.
@fossil98 There's radiated heat from the sun, which is stronger without an atmosphere to get in the way, and heat generated by electronic components inside the craft. With very little material to conduct heat away in space, it has to be managed in other ways. On earth we can conduct the heat away into the air using heatsinks and fans. In space, I'd imagine the heat has to be removed by radiating it from a surface.
Wow, that was some amazing foreshortening in the beginning. I didn't realise how big it was until he began opening the door.
chickenmunt 4 months ago
Life is like a hurricane
Here in Duckburg
Race cars, lasers, aeroplanes
It's a duck-blur
Might solve a mystery
Or rewrite history
MrMaffen 6 months ago
this could be used in a James-Bond-film, he could survive in there!
Yeahrrrrrr55 6 months ago
HA HA @ Leorules!
subliminalvibes 6 months ago
Excuse me, but isn't space not supposed to be either cold OR hot at all? If there's vacuum, which temperature are we even talking about?
Or is it maybe to simulate temperatures in other planets or stuff?
Chirigami 6 months ago
@Chirigami hot or cold are words we use to describe the amount of thermal energy in things. Cold is just the state of having relatively lower thermal energy (heat). In space, since there's a lack of physical bodies to hold any of this energy, it is in fact very "cold".
jlhagad 6 months ago
@jlhagad But, I've heard millions of times that actually the problem in space is COOLING things down, precisely because there's nothing to transfer the thermal energy. Heat can only be transferred through direct contact or radiation, but radiation has terribly slow transfer rates, so normally spacecraft remains with the same high thermal energy when it left our atmosphere (which is to say, the kinetic energy of each of its particles) until it finally arrives at some planet (if so).
Chirigami 6 months ago
@jlhagad I read about radiation and actually it's faster than I originally thought! So yeah, without any source of radiation (such as a nearby star) it would probably get to around 3K in a few hours or so. :P So it's okay after all, sorry for my misinterpretation.
Chirigami 6 months ago
@Chirigami Vacuum has no classical "temperature", but it still allows EM rays to exchange the heat between the system and the enviroment. So imagine what would happen to a piece of metal in this chamber if there weren't any cooling devices. It would exchange heat with the rest of the world, using rays. But if we surround it with cooling devices, the piece gives more rays than it receives, and it cools down to the temperature of the cooler, entering a new,lower equilibrium.
In space, that's ~3 K.
endimion17 6 months ago
Wasn't he the ninth Doctor? Sounds like him but with that mask I can't say for sure. Interesting that he picked up science after acting since he played a science based character.
2nd3rd1st 6 months ago
They could simulate zero gravity with a free-fall tower.
TaiFerret 6 months ago
what would happen if you put a person in it? shure he will die.. but what will he look like
gummel82 6 months ago
@gummel82 After few days, similar to mummy. The tissue would freeze in a couple of hours, and the volatiles like water would sublime. It's essentially freeze-drying. Check it on Wikipedia.
endimion17 6 months ago
Dont get it, is one bar a lot of pressure?
Razzfazz87 6 months ago
@Razzfazz87
that depends:
if u apply 1 bar of pressure on a big surface like the door of this chamber, the resulting force is huge...
force = pressure x surface
just search the video "railcar implosion" here on youtube
and thats not even the full 1 bar differential pressure, because u cant generate a total vaccum on earth.
the guy in this video says "760" which probably means there was a differantial pressure of 0.76 bar.
BurtonRGA7 6 months ago
@BurtonRGA7 what I mean is that 1bar pressure isn't that high for devices that are designed to withstand pressure. that railcar isn't designed to withstand the pressure so it implodes.
assuming the door is 4.5m in diameter the force on the door would be 1.4 million newton. so the door needs to hold 142 tons.. ok that IS a lot
Razzfazz87 6 months ago
@BurtonRGA7 No, it means 760 mm Hg lower than atmospheric pressure, which is roughly around that point. So it's effectively around 0 mm Hg. Few milimeters don't mean a thing for such experiments.
endimion17 6 months ago
@endimion17
well, no...
in german speaking countries (the video of that railcar is from germany) we dont use the unit mm Hg for pressure. we use bar or pascal.
and a differential pressure of 0.76 bar MEANS 0.76 bar below atmospheric pressure (dont mix up differential pressure and absolute pressure). so the absolute pressure inside the railcar must have been 0.24 bar, which is a pretty good vacuum, but still possible...
BurtonRGA7 6 months ago
@BurtonRGA7 Nobody uses mm Hg anymore... officially. But I'm interested, what railcar are you talking about?
I was reffering to the pressure inside the chamber in the video. If it's "760 mmHg lower than atmospheric pressure" then it means "roughly vacuum". Number 760 is a special number when talking about pressures and it always means either atmospheric pressure or vacuum. It can't be a coincidence. I hardly doubt it was 0.76 bar.
endimion17 6 months ago
put that david blaine guy in there...
slowmopoke 6 months ago
I wish you would have asked if they ever put a human inside it with a space suit. :(
TheWejdin 6 months ago
@TheWejdin They test space suits in pressure chambers without people in them. with people in them, they test them underwater in massive training pools.
ItsNotEvenSunny 6 months ago
is it like apature science
MrSvensli 6 months ago
Is paul ecclestone related to bernie ecclestone? :P
ExcellentScore 6 months ago
What if you would use magnets to "get rid" of the gravity in there?
uut0 6 months ago
@uut0 You want to try to explain how you can get rid of gravity with magnets?
aluisious 6 months ago
@aluisious Well not get rid of gravity but cancel it out with a magnetic force, I've seen vids of floating strawberries and frogs in a magnetic field here on Earth, unfortunately did that take quite a big magnet to achieve that result (it probably wouldn't be feasible to get something like a satellite or whatever to float since it's far too heavy though :O).
uut0 6 months ago
Space Ghost Coast to Coast
nc17atnce101 6 months ago
space sounds spooky
nc17atnce101 6 months ago
@nc17atnce101 Space sure is a very hostile environment, there's the challenge of thermal management for electronics explained here. Detectors in some space telescopes must be colder than space itself for them to see, so there is a challenge to insulate them from the rest of the vehicle. Mechanical fasteners screws and bolts get stuck and wont budge, metal becomes brittle. Space suits for moon walks & EVA are 200C sun side and minus 200C shade side. Yeah, its spooky out there.
trespire 6 months ago
@trespire thanks
nc17atnce101 6 months ago
@trespire Yes, it's very hostile environment, but space suits never reach such temperatures. People inside would die. That's why those suits are from special materials painted white.
Surface of the Moon will reach 200 °C because it's very dark and has very low thermal conductivity.
endimion17 6 months ago
Im not used to "kelvin", as my oven etc uses celsius, so I converted 77K to get my head round it better.
77K = -196.15 deg celsius (for us here in the future)
77K = -321.066 deg fahrenheit (for those who still live in the past)
Pretty chilly, then...
:P
jeebersjumpincryst 6 months ago 3
The temperature of space is about 3 Kelvin though, so is going down to 77 K enough? Liquid helium is a good bit more expensive though :P I never thought about the potential for things to overheat in space, fascinating. Lastly, I am amazed that the door is held shut with merely a C-clamp...
SpiderGirl42 6 months ago
Space... fornication...
VaelVictus 6 months ago
Pretty sure zero gravity doesn't exist, isn't it micro gravity?
Yourveryking 6 months ago
I wonder if it is possible to simulate the collision of particulate matter in there...
Cactarpus 6 months ago
This has been flagged as spam show
3:21
"Of course we can't get rid of the gravity, If we could do that I would've patented that and made my millions long time ago."
I find this sarcarm rather disturbing Mr. Paul Eccleston, shame on you if you think this way, Science is not about money, Science is above everything, is above political,monetary or religious matters.If what you search is money and fame, you are searching in the wrong place.
Draxis32 6 months ago
@Draxis32 shame on your lack of sense of humour... or shame on your trolling... either way, shame on you back! :)
BackstageScience 6 months ago 82
@BackstageScience Trolling?!? Why does everytime I post a comment on your videos you think I'm trolling Brady?
Maybe its my salty lack of humor, maybe its why. But you know what, don't be alarmed. No reason to block me or anything.I am a subscriber for almost 2 years and I won't comment on any video anymore okay?
Jeesus, its just a coment It's like It's gonna be all over the newspapers next morning.
If that is satisfatory for you.
Draxis32 6 months ago
@Draxis32 It doesn't really have anything to do with trolling......the problem is, you just turned an enjoyable situation/video into a rather depressing one........all over a joke.
uxGT 6 months ago
@Draxis32
You fail to realize the reasons why science is funded.
axelasdf 6 months ago
@Draxis32 Dude who put a cork up your ass he was joking
creedofdeath9909 6 months ago
@creedofdeath9909 Even if he wasn't joking, I would still be more than happy for him to invent an anti-gravity chamber. And to reap the rewards. It would be far better for a scientist to have that kind of money than a corporate head or CEO.
AccountTredecim 6 months ago
has a person in a space suit ever been in there?
viclorwow 6 months ago
The narrator is a duck.
culwin 6 months ago
Why was a little clamp on the outside of the door? It seems very silly.
boldger13 6 months ago
How is the seal created between the access doors and the main body of the chamber? And if there is a vacuum leak how do you do about locating the exact point, do you use a Helium sniffer?
trespire 6 months ago
Lol, you can see on his mask every time Paul inhales a breath
Sharkness77 6 months ago
so thats a good question how is heat radiated away while in space?
coldlogic1 6 months ago
@coldlogic1 Through blackbody radiation. Practically all matter radiates energy in the form of electromagnetic radiation. Some of this radiation is blatantly obvious to humans, such as the sun radiating visible light because it is so hot, but all matter radiates in some way. Humans and other mammals, for example, do a lot of radiating in the infrared. That's what infrared and thermal cameras detect. This is b/c electrons are bumped up an energy level and then emit a photon as they fall back
PBDPBD 6 months ago
@PBDPBD i knew that, but i always thought it wouldnt radiate enough energy away and heat would build up, what i really ment was, what methods do space craft use to radiate that heat away? call me boreing but i find it interesting even the chemical coolents used to cool space suits.
coldlogic1 6 months ago
Fascinating video!
I feel compelled to ask a series of questions of the form:
"What would happen if you put a ________ in it?"
AlanKey86 6 months ago 67
@AlanKey86 shit would happen
shaurz 6 months ago
Temperature?
Surely there isn't much a temperature could do in space because of how little material there is to influence the temperature of spacecraft.
fossil98 6 months ago
@fossil98 The temperature in space is influenced by radiation not by conduction via particles. Temperature in space is a BIG problem because the only way to get rid of heat of a spacecraft is to radiate it away.
A lot of electronic devices do not work in space because they overheat in the absence of air.
Morkvonork 6 months ago 20
@Morkvonork That is not particularly true. Thermal management is a concern, but is generally quite manageable. It isn't that parts don't work. It's that they don't work in a particular thermal budget. It's all about how you use your parts and what your goal is.
jawayetti 6 months ago
@fossil98 There's radiated heat from the sun, which is stronger without an atmosphere to get in the way, and heat generated by electronic components inside the craft. With very little material to conduct heat away in space, it has to be managed in other ways. On earth we can conduct the heat away into the air using heatsinks and fans. In space, I'd imagine the heat has to be removed by radiating it from a surface.
Nyphur 6 months ago 4
This has been flagged as spam show
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bbqsauceonmycock 6 months ago