What I think is interesting is when he puts his hand-arm into the reference point of the spinning camera. The water container stays stationary, but his hand-arm rotates even though we know he’s standing still. This is a great depiction of how one’s frame of reference impacts the perception of events.
Qué grande! estaría muy bien que repitieras el experimento metiendo en el contenedor alguna mini-montaña y/o mini-cordillera, o incluso mini-ciudades con rascacielos. Muchas gracias por mostrarnos este simple pero increíble experimento
Hypnotic and amazing- It's like watching CGI weather pictures on the news but it "SEEMS" faster- then you scale it in your mind up to the size of a fluid like our atmosphere and realise a human being wouldn't even be the size of a speck of dust in that tank 😶
@@DjordjeRomanic What you gave, is a proof that theorical studies alone are nothing but fiction, but when you provide a concrete example of a phenomenon or a humble trial, you give the science life, education systems must all put the effort and work like you did Sir Thank you so much for efforts (I knew my days in college were a waste of time :'( )
An idea to step it up: Encase a globe in a spherical shell representing the atmosphere, fill it with water, and spin it. I wonder if you can simulate gravity using a charged sphere which attracts ions in an ionic liquid?
Interesting indeed. Probably there would be some unwanted repulsion of charged articles in the liquid. But if one is not interested in vertical motion (which indeed is not so important at synoptic scales), then simulating gravity might not be so important. The experiment might work quite well for horizontal motions.
Yes, the scales at which the Coriolis force starts to be important are determined through the values of Rossby number. On large scales (e.g., around 1000 km and above), the Coriolis force is as important as the pressure gradient force, which is the force that initiates the motion of air in the horizontal directions.
@@rolandkaschek9722 The Coriolis force is = -2*Omega x V, where "x" denotes the cross product between two vectors, Omega is the angular velocity of the Earth and V is velocity of an object (e.g., cloud, wind speed, etc.). Given that Omega = constant, the higher the speed, the larger the Corriolis force.
You can go a bit further with this demonstration. Use a cylindrical tank, have a small container of ice in the centre and heat the outer edge of the tank. Rotate the tank and put dye in and you will end up with a scale model of planetary (Rossby) waves transporting heat from the warm outer edge to the cool interior.
That is correct. I will repeat the experiment under these conditions once I further develop my atmospheric dynamics playlist to include different waves in the atmosphere. Here, the goal was to isolate dynamics of Coriolis force without adding thermodynamics effects. Good point though.
The centrifugal effects of water building up in the corners would not be pronounced. But, overall, the geometry of the container does not affect the demonstration of the Coriolis force effects.
If weather patterns and ocean currents follow the Coriolis effect around the surface and atmospheric layers and oceanic depths of our spherical Earth, what would or could the effect of the Earth stopping spinning around its common axis be upon those patterns? Would weather and oceanic streams merge, equalize, and settle?
If the Earth would stop spinning now, we would all die by being thrown towards the east at the peripheral velocity of our latitude. So, actually, it would be the best if you were at the North or South Pole. That force associated with changes in angular velocity also has name: Euler force. I have a video in which I derive it mathematically together with the other non-inertial forces. After the Earth stops spinning and stays in the complete halt, there would be no Coriolis force berceuse there is no angular velocity of the Earth. That is, the system is no longer non-inertial.
if the Earth stopped spinning but kept orbiting so that the day was the same as the year might induce differential heating of the planet thereby creating air movement, I think high winds would happen but Im just guessing
@@mattymcsplatty5440 Yes, you are right about that. The atmosphere and the oceans would not be 100% still, but there wouldn't be the Coriolis effect on a non-rotating planet.
Excellent !!! (Fin de vidéo) Une fois les 'particules' mélangées, et donc une eau de couleur uniforme, si on remet le bac en rotation, pourrait-on obtenir, au bout d'un temps important une séparation des couleurs ?
I still don't speak French, unfortunately. To answer your question, the mixing would not be reversed by turning on the rotation. Once mixed, it stays mixed.
Yes and no; depending on the problem that you are interested in. If you are measuring a position of a cat moving with respect to you in your room, then you are inertial reference frame for all practical purposes. However, for someone in the outer space that is looking at the Earth and sees you rotating with the planet, you are a non-inertial reference frame (namely, you are constantly accelerating).
The ink here dropped into the water does not have the same inertia as the water. Which must have an effect. No? What would it look like if the ink was rotating with the liquid as it is released? Imagine a remote controlled syringe, or a small balloon broken by laser, fixed to the tank, and thus rotating with the tank.
Interesting suggestion. But the outcome would be similar. The ink in the present experiment quickly gains rotation of the fluid. Interesting to consider in the future though.
Probably the same force is in the whole universe, otherwise we would mix up nicely and everithing would be the same, or it takes so much time in universe that we didn't start to mix up yet. If that is true and whole universe is rotating, can you imagine the rotational speed at the edge of the universe... 😀
@@DjordjeRomanic Conservation of angular momentum of air around the axis, the axis being the center of the low pressure zone caused by hot air rising. Air at the canter rises, air from the surface moves in to replace the air that rose at the center of the low. Air from the south is moving faster due to earth's rotation, so it adds counterclockwise spin, air from the north is moving slower and it also adds counterclockwise spin. Air from the east and west are going the same speed so they don't add any rotation but it picks up counterclockwise spin from the N and S air. As the air moves inward each air molecule conserves angular momentum so the spin increases as it moves in.
I'll take the explanation at the Khan Academy on the Coriolis effect and its influence on hurricane rotation as the best simple explanation. PS: It's spelled dye. The demo works well for ocean currents. And adds additional understanding of inertial frame versus rotating frame.
@@toma5153 What is their explanation, I'm not going to search their web site. If their explanation is different from mine, it's wrong, as my explanation is the standard one given by all teachers.
@@DjordjeRomanic I love it... was an amzing experiment. Sounds silly, but I can't stop thinking about your experiment and the oceans... I think that this can help a lot to "understand and find" more "floating plastic islands" to clean it... There is a way to "make" the tide effect together with the rotating table? Maybe...2 rotating tables?!?!?! different speeds?!?!
@@DjordjeRomanic and replace the squared glass aquarium...for a "circular" recipient. I believe that the shape can change some "effects" that occurs at the corners of the recipient. I'm not sure...but looks like that there is some interesting movement at the corners;Thank you so much.
next time I make a coffee I'll have to remember not to stir it at all so that coffee mixes with the milk and sugar more quickly. Or maybe thing to do is stir it just a little, let it stop spinning, then stir again etc..
Stirring a static cup of coffee and having the cup rotated is not the same. So, the thing to do is to drink coffee with milk only. I mean, who adds sugar to coffee.
@@DjordjeRomanic ? of course it's not exacly the same but perimeter of cup stays fixed doesn't mean coriolis effect doesn't take place in the fluid. never mind..
What I think is interesting is when he puts his hand-arm into the reference point of the spinning camera. The water container stays stationary, but his hand-arm rotates even though we know he’s standing still. This is a great depiction of how one’s frame of reference impacts the perception of events.
That is exactly right.
Qué grande! estaría muy bien que repitieras el experimento metiendo en el contenedor alguna mini-montaña y/o mini-cordillera, o incluso mini-ciudades con rascacielos.
Muchas gracias por mostrarnos este simple pero increíble experimento
Hypnotic and amazing- It's like watching CGI weather pictures on the news but it "SEEMS" faster- then you scale it in your mind up to the size of a fluid like our atmosphere and realise a human being wouldn't even be the size of a speck of dust in that tank 😶
Fascinating! I actually learned something new.
Thank you very much.
That is awesome! and trippy.
Thank you.
Finally something useful
Glad to hear that.
@@DjordjeRomanic
What you gave, is a proof that theorical studies alone are nothing but fiction, but when you provide a concrete example of a phenomenon or a humble trial, you give the science life, education systems must all put the effort and work like you did Sir
Thank you so much for efforts
(I knew my days in college were a waste of time :'( )
excellent video. id like to see demonstrations of projectile behavior affected by coriolis force.
I have a video on that at a shooting range in Texas.
An idea to step it up: Encase a globe in a spherical shell representing the atmosphere, fill it with water, and spin it. I wonder if you can simulate gravity using a charged sphere which attracts ions in an ionic liquid?
Interesting indeed. Probably there would be some unwanted repulsion of charged articles in the liquid. But if one is not interested in vertical motion (which indeed is not so important at synoptic scales), then simulating gravity might not be so important. The experiment might work quite well for horizontal motions.
Exploratorium had this with non mixing fluids. It was around 8 feet wide.
Does the Coriolis effect also occur in the atmosphere? The movement of clouds for example?
Yes, the scales at which the Coriolis force starts to be important are determined through the values of Rossby number. On large scales (e.g., around 1000 km and above), the Coriolis force is as important as the pressure gradient force, which is the force that initiates the motion of air in the horizontal directions.
@@DjordjeRomanic Thank you! Is it known which Faktors affect the strength of the Coriolis Force in the higher atmosphere?
@@rolandkaschek9722 The Coriolis force is = -2*Omega x V, where "x" denotes the cross product between two vectors, Omega is the angular velocity of the Earth and V is velocity of an object (e.g., cloud, wind speed, etc.). Given that Omega = constant, the higher the speed, the larger the Corriolis force.
Господи как у вас засраты мозги 😢
Good one !
You can go a bit further with this demonstration. Use a cylindrical tank, have a small container of ice in the centre and heat the outer edge of the tank. Rotate the tank and put dye in and you will end up with a scale model of planetary (Rossby) waves transporting heat from the warm outer edge to the cool interior.
That is correct. I will repeat the experiment under these conditions once I further develop my atmospheric dynamics playlist to include different waves in the atmosphere. Here, the goal was to isolate dynamics of Coriolis force without adding thermodynamics effects. Good point though.
What is the container was circular instead of square?
The centrifugal effects of water building up in the corners would not be pronounced. But, overall, the geometry of the container does not affect the demonstration of the Coriolis force effects.
Great stuff!
Glad you enjoyed it.
If weather patterns and ocean currents follow the Coriolis effect around the surface and atmospheric layers and oceanic depths of our spherical Earth, what would or could the effect of the Earth stopping spinning around its common axis be upon those patterns?
Would weather and oceanic streams merge, equalize, and settle?
If the Earth would stop spinning now, we would all die by being thrown towards the east at the peripheral velocity of our latitude. So, actually, it would be the best if you were at the North or South Pole. That force associated with changes in angular velocity also has name: Euler force. I have a video in which I derive it mathematically together with the other non-inertial forces.
After the Earth stops spinning and stays in the complete halt, there would be no Coriolis force berceuse there is no angular velocity of the Earth. That is, the system is no longer non-inertial.
if the Earth stopped spinning but kept orbiting so that the day was the same as the year might induce differential heating of the planet thereby creating air movement, I think high winds would happen but Im just guessing
@@mattymcsplatty5440 Yes, you are right about that. The atmosphere and the oceans would not be 100% still, but there wouldn't be the Coriolis effect on a non-rotating planet.
🤯
Excellent !!!
(Fin de vidéo) Une fois les 'particules' mélangées, et donc une eau de couleur uniforme, si on remet le bac en rotation, pourrait-on obtenir, au bout d'un temps important une séparation des couleurs ?
I still don't speak French, unfortunately. To answer your question, the mixing would not be reversed by turning on the rotation. Once mixed, it stays mixed.
@@DjordjeRomanic Merci.
Et si l'on place sous le bac un champ magnétique puissant (afin d'avoir l'équivalent d'un séparateur magnétique ) ?
am I the non inertial reference frame?
Yes and no; depending on the problem that you are interested in. If you are measuring a position of a cat moving with respect to you in your room, then you are inertial reference frame for all practical purposes. However, for someone in the outer space that is looking at the Earth and sees you rotating with the planet, you are a non-inertial reference frame (namely, you are constantly accelerating).
@@DjordjeRomanic thank you!
The ink here dropped into the water does not have the same inertia as the water. Which must have an effect. No?
What would it look like if the ink was rotating with the liquid as it is released?
Imagine a remote controlled syringe, or a small balloon broken by laser, fixed to the tank, and thus rotating with the tank.
Interesting suggestion. But the outcome would be similar. The ink in the present experiment quickly gains rotation of the fluid. Interesting to consider in the future though.
Where is your inspector gadget coat?
:P
4:44 SEGA DREAMCAST LOGO
Probably the same force is in the whole universe, otherwise we would mix up nicely and everithing would be the same, or it takes so much time in universe that we didn't start to mix up yet. If that is true and whole universe is rotating, can you imagine the rotational speed at the edge of the universe... 😀
Cubic container ruins the explanation of the end... :(((
The demonstration is not affected by the geometry of the container.
🇷🇺🇷🇺🇷🇺🇷🇺🇷🇺🇷🇺❤🏴🇮🇪🏴🏴
Nice dye trick but it has nothing to do with hurricanes.
Why not? How hurricanes get their rotation?
@@DjordjeRomanic Conservation of angular momentum of air around the axis, the axis being the center of the low pressure zone caused by hot air rising. Air at the canter rises, air from the surface moves in to replace the air that rose at the center of the low. Air from the south is moving faster due to earth's rotation, so it adds counterclockwise spin, air from the north is moving slower and it also adds counterclockwise spin. Air from the east and west are going the same speed so they don't add any rotation but it picks up counterclockwise spin from the N and S air. As the air moves inward each air molecule conserves angular momentum so the spin increases as it moves in.
In the southern hemisphere it's just the opposite. There are no hurricanes at the equator because the N air and S air cancel each other out.
I'll take the explanation at the Khan Academy on the Coriolis effect and its influence on hurricane rotation as the best simple explanation. PS: It's spelled dye.
The demo works well for ocean currents. And adds additional understanding of inertial frame versus rotating frame.
@@toma5153 What is their explanation, I'm not going to search their web site. If their explanation is different from mine, it's wrong, as my explanation is the standard one given by all teachers.
Who is color blind?!...oh boy... there is no mixing color between red and green. they "look" the same.
Sorry about that. I should have thought about it beforehand. But trust me, thee is much less mixing when the table is rotating. :)
@@DjordjeRomanic
I love it... was an amzing experiment.
Sounds silly, but I can't stop thinking about your experiment and the oceans... I think that this can help a lot to "understand and find" more "floating plastic islands" to clean it... There is a way to "make" the tide effect together with the rotating table?
Maybe...2 rotating tables?!?!?! different speeds?!?!
@@DjordjeRomanic and replace the squared glass aquarium...for a "circular" recipient.
I believe that the shape can change some "effects" that occurs at the corners of the recipient.
I'm not sure...but looks like that there is some interesting movement at the corners;Thank you so much.
I see 90% haters in the comments
That's where the fun is. :)
@@DjordjeRomanic Haters gonna hate
Can you see their red eyes ;)?
next time I make a coffee I'll have to remember not to stir it at all so that coffee mixes with the milk and sugar more quickly.
Or maybe thing to do is stir it just a little, let it stop spinning, then stir again etc..
Stirring a static cup of coffee and having the cup rotated is not the same.
So, the thing to do is to drink coffee with milk only. I mean, who adds sugar to coffee.
@@DjordjeRomanic ? of course it's not exacly the same but perimeter of cup stays fixed doesn't mean coriolis effect doesn't take place in the fluid. never mind..
yap and what can we do with this shit