Umm..... What if it's negative viscosity, as in, it climbs -down- the cappilaries as a normal liquid would climb -up- them, and at the same time it's un-viscous enough to have inter-molecular pull to be able to pull itself and the blades around?
Correct me if I'm talking gibberish, but what if that's true?
It is very rare, and a true pleasure, to see a video like this that describes science in a way that is not watered down! A real treat, I wish I had seen this when in college or grad school.
what i was thinking about was: is the viscosity the one responsible for spinning the wheels, or could there be any other reason of motion of the blades for the helium II experiment?
@sintje21 Yes this question has been raised often by others, but we haven't been able to come up with any reasons. The little blades were made out of the wooden matchboxes which were common then, and they were cemented to little wooden sticks.. None of these have electric conductivity. The induction motor wouldn't affect them. - Thanks for your interest.!
@ale86itn i'm sorry to sound stupid but i'd like to suggest one idea. What if the centrifugal force does not need matter to transfer force. i was thinking of the universe, there's no matter in space, but there are centrifugal forces. (another thing was, how hot was the machine that went into the helium II) thanks for your video.
@ale86itn hi :) i'm not sure if this is the case, but i see the rotor has some diagonal lines. couldn't those act like some sort of propeler blaed (in a verry strange way lol). what am i asking, is the cilinder a perfect cilinder or it might have minor imperfections?
meybe liquid he 2 changes it's viscosity with the speed between the lairs. this might explain why it flows like a superfluid in the first case, but it does not act like 1 in the second.
They give the answer in the video. It's because there is a component of normal He and a component of superfluid He. (Only when temperture is zero the Helium will be a 100% superfluid)
That explanes why there are viscosity-effects. (caused by the normal He component) and explanes why the He can drip through the tiny holes (because that's caused by the superfluid component)
Hope that explanes it!
And yes, I think you can see the cilinder as perfect.
@ale86itn i want to bring up something i saw a year or 2 ago on the science channel, i can't remember the exact methods but from what i do remember they used a superconducting magnet to levitate just about anything from water to glass and everything inbetween including a frog and a turkey sandwitch
@ale86itn also if the paddle had any bit of electrically conductive properties it would spin with the rotation of the magnetic field because of the magnetic field's pull on the paddle's electrons, rotate a strong magnet inside of an aluminum cylinder and the cylinder will eventually turn as well, if the EM force overcomes friction and inertia of the cylinder
@ale86itn what if it was not the fluid that was moving, due to the lack of viscosity. Adding a drop of color to the fluid would explain a lot weather the fluid is spinning or the blade itself since viscosity might be absent in the super fluid state. How does gravity or friction behave on matter when in superfluid? what are the possibilities of an electromagnetic effect. Please forgive me if my questions are idiotic. Oh and how would super fluid itself behave in Zero Gravity.
Wow, this is extremely fascinating. I love Quantum Mechanics (I read Brian Greenes' book The Elegant Universe and Stephen Hawkings: A Breif History of Time). This Paradox of Helium ][ reminds me of Wave-Partical Duality. Both states are true (Wave and Particle) but they completely contradict each other. Very, very fascinating video experiment.
@mrjustin5 Yes, I am equally fascinated by Quantum Mechanics. I've been reading "In Search of Schrodinger's Cat" by John Gribbin. It is incredibly fascinating stuff. He talks a little bit about superfluid helium in one section and indeed it is very similar to wave-partical duality in that, when it makes the transition to superfluidity, the electrons pair up and seem to obey Bose-Einstein statistics rather than Fermi-Dirac (as in superconductors). Fascinating!
MindF*ck.
DackIsBack 4 months ago in playlist Liquid Helium II, Superluid
what if the normal component was some helium 3 isotopes mixed with
the helium 4?
thepcguy01 8 months ago in playlist Liquid Helium II, Superluid
is liquid helium 2 a bose-einstein condensate?
thepcguy01 8 months ago in playlist Liquid Helium II, Superluid
I'm just curious how they got it to say in the beaker in the second experiment.
if only it was so cold, it would be awesome(impossible) to try and swim in it.
Bboiblack 10 months ago in playlist Liquid Helium II, Superluid
Damn I love physics. Every time we thing we have it figured out it presents us with a new problem. It's like a great book that never ends.
pyrea17 11 months ago
Thanks a lot for posting these videos!
shmigal 1 year ago
Is the empty part of the becker filled with liquid helium vacuum?
masacatior 1 year ago
Umm..... What if it's negative viscosity, as in, it climbs -down- the cappilaries as a normal liquid would climb -up- them, and at the same time it's un-viscous enough to have inter-molecular pull to be able to pull itself and the blades around?
Correct me if I'm talking gibberish, but what if that's true?
DarkWarp1011 1 year ago
It is very rare, and a true pleasure, to see a video like this that describes science in a way that is not watered down! A real treat, I wish I had seen this when in college or grad school.
sinunputki3 1 year ago
Comment removed
cl114c0777498d 1 year ago
how does capillary action test for viscosity?
Hemitris 1 year ago
what i was thinking about was: is the viscosity the one responsible for spinning the wheels, or could there be any other reason of motion of the blades for the helium II experiment?
sintje21 1 year ago 2
@sintje21 Yes this question has been raised often by others, but we haven't been able to come up with any reasons. The little blades were made out of the wooden matchboxes which were common then, and they were cemented to little wooden sticks.. None of these have electric conductivity. The induction motor wouldn't affect them. - Thanks for your interest.!
ale86itn 1 year ago
@ale86itn i'm sorry to sound stupid but i'd like to suggest one idea. What if the centrifugal force does not need matter to transfer force. i was thinking of the universe, there's no matter in space, but there are centrifugal forces. (another thing was, how hot was the machine that went into the helium II) thanks for your video.
sintje21 1 year ago
@ale86itn hi :) i'm not sure if this is the case, but i see the rotor has some diagonal lines. couldn't those act like some sort of propeler blaed (in a verry strange way lol). what am i asking, is the cilinder a perfect cilinder or it might have minor imperfections?
meybe liquid he 2 changes it's viscosity with the speed between the lairs. this might explain why it flows like a superfluid in the first case, but it does not act like 1 in the second.
i'm not an expert, i'm just asking :D
stalkersas 1 year ago
@stalkersas
They give the answer in the video. It's because there is a component of normal He and a component of superfluid He. (Only when temperture is zero the Helium will be a 100% superfluid)
That explanes why there are viscosity-effects. (caused by the normal He component) and explanes why the He can drip through the tiny holes (because that's caused by the superfluid component)
Hope that explanes it!
And yes, I think you can see the cilinder as perfect.
Janaake 1 year ago
@ale86itn i want to bring up something i saw a year or 2 ago on the science channel, i can't remember the exact methods but from what i do remember they used a superconducting magnet to levitate just about anything from water to glass and everything inbetween including a frog and a turkey sandwitch
denvera1g1 6 months ago
@ale86itn also if the paddle had any bit of electrically conductive properties it would spin with the rotation of the magnetic field because of the magnetic field's pull on the paddle's electrons, rotate a strong magnet inside of an aluminum cylinder and the cylinder will eventually turn as well, if the EM force overcomes friction and inertia of the cylinder
denvera1g1 6 months ago
@ale86itn what if it was not the fluid that was moving, due to the lack of viscosity. Adding a drop of color to the fluid would explain a lot weather the fluid is spinning or the blade itself since viscosity might be absent in the super fluid state. How does gravity or friction behave on matter when in superfluid? what are the possibilities of an electromagnetic effect. Please forgive me if my questions are idiotic. Oh and how would super fluid itself behave in Zero Gravity.
TAkabir 5 months ago
Wow, this is extremely fascinating. I love Quantum Mechanics (I read Brian Greenes' book The Elegant Universe and Stephen Hawkings: A Breif History of Time). This Paradox of Helium ][ reminds me of Wave-Partical Duality. Both states are true (Wave and Particle) but they completely contradict each other. Very, very fascinating video experiment.
mrjustin5 1 year ago 8
@mrjustin5 Yes, I am equally fascinated by Quantum Mechanics. I've been reading "In Search of Schrodinger's Cat" by John Gribbin. It is incredibly fascinating stuff. He talks a little bit about superfluid helium in one section and indeed it is very similar to wave-partical duality in that, when it makes the transition to superfluidity, the electrons pair up and seem to obey Bose-Einstein statistics rather than Fermi-Dirac (as in superconductors). Fascinating!
Fishies125 1 year ago
@mrjustin5 yo dude man,i too read those books.i love them like a nerd studying.
keynesh458 8 months ago in playlist Liquid Helium II, Superluid
That's very interesting! Nice video indeed!
JayMark2049 1 year ago
These are the best physics videos I've ever seen.... I'm glad I found them.
goomba45797 2 years ago 17
Many thanks for your comment!
ale86itn 2 years ago