As far as I know, on the Northern Hemisphere winds rotate counter-clockwise, not clockwise as stated in the video (just look up some satellite images of cyclons). Yes, the Coriolis Force will deflect air traveling on the northern hemisphere to the right, however that means that if you stand in such a way that wind is blowing on your back, the area of low pressure will be on your left hand (since the traveling air will be deflected to the right). Because wind will blow from the area of high pressure to the area of low pressure, it will spin counter clockwise (to the left) on the Northern Hemisphere and clockwise (to the right) on the Southern Hemisphere.
Yes, areas of Low Pressure in the Northern Hemisphere include winds flowing counter clockwise around them. Winds flow clockwise around Low pressure systems in the Southern Hemisphere. It's the opposite for wind flow around areas of High Pressure: winds flow clockwise around Highs in the N. Hemisphere.
I think the map is just using a weird projection... which is weird since it's depicting a sphere (or to put it in another way, it's a picture of the globe rather than a map of the globe), you'd think it'd be easy to get it right. Actually it just looks like someone cut up a circle out of a normal Mercator world map (which tends to emphasize the northern hemisphere, making it look huge in comparison to the southern). Edit: I checked and yeah, the equator is correct according to the landmasses but the map itself is distorted so it looks like it's wrong. (And it's wrong on the circle since it should be in the middle.)
I checked google earth and the equator is correct in this vid. I think it looks weird because I'm used to seeing the equator as it crosses South America and it somehow looks higher when it's got most of the wide part of the continent under it as opposed to having the wide part of Africa on top of it. Just a guess but the brain is funny that way. But it is right as shown here.
Actually, the equator is in the right place in relation to the continents, but 60 degrees N is waaay too high. It should cut just about through Stockholm, Sweden; Oslo, Norway; Helsinki, Finland; and St. Petersberg, Russia. Or at least come really close to these cities. On the other side of the "map", 60 degrees N should cut off the Kamchatka Peninsula just a bit south of where it meets the rest of Russia.
Yeah, that's some mad Eurocentricism for ya, they need to bump the land masses up where they belong! Bad graphic design perpetuating some bad distortions of who/where is the most important on the globe...
Two mistakes in this video. The "circumference" of the Earth at the Equator is 40,076 km, not the diameter. Second, storms in the Northern Hemisphere rotate counter-clockwise, not clockwise. That means that low pressure systems that produce hurricanes or cyclones in the Northern Hemisphere rotate counter-clockwise.
+Flearther McPlane "Storms rotate which ever way the pressure systems and other variables dictate, a Coriolis effect not being one of them." Nope, wrong. If it was just whatever random set of variables happened to be present at the time that a low pressure weather system developed that determined which way the system rotated, then we should expect to see at least some low pressure weather systems north of the equator rotate clockwise, and occasionally see some low pressure weather systems south of the equator rotate counter-clockwise. However, we never see that. ALL low pressure weather systems north of the equator rotate counter-clockwise, and ALL low pressure weather systems rotate clockwise south of the equator. Only the Coriolis effect explains that duality.
+Flearther McPlane "The history of Hurricanes show both directions on either side of the equator." Prove it. Give us some details - dates, names and locations - about these hurricanes and typhoons that spun the opposite way that the Coriolis effect predicts. Tornadoes have a more random spin. They are relatively small, short lived phenomena that are less affected by the Coriolis effect and more by the characteristics of the storm that spawns them. However, hurricanes and typhoons always spin counter-clockwise north of the equator, and clockwise south of the equator. Here is a website you can use to track these storms and check them out for yourself. severe.worldweather.wmo.int/
@Flearther McPlaneLiterally the exact word for word answer you get when you Google prevailing wind. Why is there prevailing wind. Don't just Google it, show you understand it.
1:50 Hank says the coriolis effect does affect "bigger, slower moving fluids." The experiment Veritasium and Smarter Every Day conducted proved the same thing
Except that a kiddie pool probably was probably still much smaller than the scale that Hank was thinking of and referring to, but it worked with the right conditions of still water and no other effects present. It's just a _very_ small force at that scale.
I have a question: since time is relative to the velocity at which something moves. Does that mean that people who live in Texas experience time slower compared to let's say a scientist living on the north pole?
Kevin J Replying mostly because I want the answer and Google just throws maths at me. My own thinking throw one big wrench in the experiment: the gravity vary depending where you are on Earth because it is not a perfectly sphere and it's density is not the same everywhere either. Let say Earth was a perfectly homogeneous sphere not affected by any outside force like the Moon and Sun's gravity, but still spinning on its axis like it does now. In that case I wonder how much the centrifugal force of someone at the equator will lessen the effect of gravity and therefore speedup their time relative to someone at the pole. Will the two effects, speed and lesser gravity, cancel each other?
SlyPearTree I would like to know why the coriolis effect doesn't affect hovering helicopters. Even Mr Coriolis might consider scrapping his theory if he did not observe a helicopter waiting for it's destination to rotate to it. 🙀🤦♂️🙀🤦♂️🙀🤦♂️
At 52 seconds. Could you not have used any other map projection. The Mercator projection is super unhelpful for globes, or their likenesses. Check out that equator you drew; definitely not in the middle of the circle...
Easily influenced by how the water is poured. I watched a guy do it, and the customers were too busy watching the straws floating in the middle of the bowl, to notice that the guy pouring the water poured it three different ways, aiming slightly left, slightly right or in the middle depending on where he was standing and what he wanted the customers to see. 10 metres is nothing.
I'm so confused. I'm in Biology right now and my roommate is an oceanography major, both of our books say that in the north it is counter-clockwise and in the south it is clockwise. I read various resources online and some support this idea while some don't...... please help! Which is right?!
Joan Mae in northern hemisphere, the clouds around hurricane rotate counter clockwise around the eye. But the Foucault pendulum in northern hemisphere rotates clockwise. So the standard cliche explanations must need more explanation to account for the motion around the eye of hurricane. I visualized both and that's how I see it. That is they appear to contradict each other.
+Flearther McPlane " Full Moon in the day time, really?" What do you mean by "day time"? We never see a full moon, for instance, at noon. It simply does not happen. You will see an almost full moon just before sunset, or just before sun rise, but you will never see a 100% full moon in the sky at the same time as the sun.
+Flearther McPlane "Viewing Venus in the middle of the night. Really?" No, that isn't right either. We never see Venus at midnight, in the "middle of the night". The farthest Venus ever gets from the sun is 45 degrees, so just before sunrise or just after sunset, Venus can be seen halfway between the horizon and directly overhead.
+Flearther McPlane "Tides on a single coast, 2' in one place and 24' just up the way. 4 tidal changes in one place and 2 in others. Tides do NOT react in any way in accordance with the Lunar body. Never have, never will." More misrepresentation. What do you mean by "just up the way"? The timing and approximate height of a tide can be predicted years in advance by analyzing the positions of the sun and moon. However, the exact height of a tide has more to do with the topography of the coast line than anything else. The highest tides in the world, in the Bay of Fundy in Canada, are caused by the water piling up as it surges into a bay that gets progressively narrower and narrower. The height of the tide in the mouth of the bay is about 10 feet, while the height of the tide at the narrowest point at the north end of the bay can exceed 50 feet. All of the highest tides in the world share the same topography, a long bay with a wide mouth that progressively narrows down. We can precisely predict when a tide will occur anywhere by tracking the positions of the sun and moon, but the exact height of the tide varies by a location's topography.
+Flearther McPlane "In fact, if you go outside to observe a lot of things, you'll realize the absurdity of a multitude of misinformation in scholastic text." If you live south of the equator, you only have to spend one evening observing the night sky to know that the earth is not flat. When looking north from north of the equator, all of the stars appear to rotate counter-clockwise around Polaris, in accordance with the flat earth model. However, when looking SOUTH from SOUTH of the equator, you see a completely different set of stars, rotating around a different point in the sky, and rotating in the opposite direction, clockwise around the south celestial pole instead of counter-clockwise around Polaris as the northern stars do. You can't even see Polaris from south of the equator. Flat earth busted.
Just for fun: if the Coriolis effect was strong enough to affect toilets wouldn't it cause mini whirlpools in your bloodstream? Or make your pee veer off to one side? :)
I saw videos of experiments from countries on the equator demonstrating that water don't rotate when drained exactly on the equator with smaller basins, clockwise if the basin is moved slightly to the north, and counter-clockwise when drained slightly south of the equator.
He made a mistake at 2:20 and on. He states that weather systems in the Northern Hemisphere rotate clockwise and counterclockwise in the Southern Hemisphere. That's wrong. Weather systems in the Northern Hemisphere rotate counterclockwise and in the Southern Hemisphere they rotate clockwise.
IamGrimalkin NO... the type of system makes NO difference as to the direction of rotation. At the equator, there is little to no rotation and creates an area called the doldrums where really no cyclones (neither hurricanes nor tornadoes) exist. Source: I have a BS in Geography.. A high pressure systems act like a "hill" , low pressure systems act ,like a "valley", moisture will move into low pressure systems and away from high pressure systems. So, if I have high pressure in the west, and low pressure in the east, the system will have a vector of moving from west to east. The magnitude of the vector is dictated by the isobars(measures pressure gradients) distance from each other. If the isobars are close together, the force is strong, if the isobars are further apart, the force is weaker. The isobars dictate the rate of change of pressure. This vector is also ADDED to the vector that is the "general circulation of the atmosphere" , which he began to explain in speaking about how stuff moves back and forth from the poles to the equator, this would be the predominant movement but for the Coriolis effect, which causes a curve when the rotational vector and the vertical vectors combine. There are many things at play in weather patterns but it's mostly the general circulation of the atmosphere, the tilt of the earth and it's angle of incidence of the suns rays with the earth, and the thermal/pressure gradients that result from the pressure/temperature differentials caused by where the suns rays are and are not hitting. It also has to do with the density of the atmosphere, the size of the particles the light is passing through, the albeto effect... it goes on and on. It's not a simple answer in the nitty gritty of it.
fordfiveohh Yeah, air does move away from high pressure systems and towards low pressure systems. And the Coriolis force curves things to the right in the northern hemisphere and the left in the southern hemisphere. When air is moving outwards, "to the left" is anticlockwise, whereas when it is moving inwards, "to the left" is clockwise.
I love you , I love you, I love you! The Earth Science regents are in 5 days and I'm panicking because I was an idiot and left months of studying to the last minute. And now I have to spend 10 months of lessons into my head in just 5 days. *THANK YOU!!!*
@@brandonhernandez371 Captain Deadpool was right. The low pressure systems ALWAYS rotate counter clockwise in the northern hemisphere and opposite in the south. Similarly the high pressure systems blow clockwise in the north and counter clockwise in the southern hemisphere. This fact is known to all navigators in the air and on the sea. We rely on this fact to determine where to best go in case we have to stear away from the systems. THIS IS A FACT and I know this because I'm a navigator. Check out the next weather report on your local tv station and you'll see it. I will give 1.000.000 USD to the one who can disprove this fact!! I dare you!!!! Heck. I double dare you :)
@@boanthun Yeah what kind of credentials does this guy with a crappy channel name have? I bet his credentials don't mean what he thinks they mean...doh!
They're right but their explanation was contrary. If the Coriolis can affect hurricanes then it'll affect something even smaller. Basically, while it affects swirel rotation other things can have a far larger influence and thus counter act or reinforce the Coriolis affect.
Scishow! Hey! There is a large misunderstanding of aviation and parachute in the media (weird, right?) and I think it would be cool to do a show on BASE jumping, 'what if the parachute doesn't come out'? which pretty much ever happens, it's more complicated than that. Or 'what if the engine stops?' no, it does't just fall out of the sky, etc. I have a degree in aero, and I am a professional parachutist. If you are interested, I would love to help! PS- I love your show (space, etc) and thank you for being awesome. Communicating science is one of the more important things ever. -Calvin.
Wow - talk about timely. I'm an Australian who just happens to have flown over to the US over the weekend and it was literally yesterday that I had exactly the same thought you opened your video with. Now if I just knew why the designs of toilet bowls differed so much from the US to Australia, that would be one less irritating, trivial detail for my brain to lock on to. :)
Related to the Coriolis Effect (maybe?) is that if you drop something down the center of a very deep mine shaft it will *not* hit the bottom directly, instead hitting and bouncing down the western side of shaft. They have actually done this for instance in the super deep mines in Russia.
This is more likely related to the fact that the center of gravity of the Earth is NOT the center of the Earth. It's slightly off-center. Idk, might be a combination of both too. Idek where to look for an answer to this 🤷♂️. Perhaps a geologist would know?
The equator at 0:53 is drawn CORRECTLY in regards to the continents shown, but INCORRECTLY in regards to the shape of the earth. Which means the landmasses are shifted (northwards) on that globe from where they actually should be.
I remember a long while back on the Simpsons, they went to Australia over something Bart did and that's where that myth started for me. Thanks for clearing this up.
2:15 doesn't the arrows go in the opposite direction since low pressure does go anti-clockwise and to add .....from the equator forming the Hadley cell where its starts as low pressure?
The equator at 0:52 is anything but along the middle of the earth, I don't know if this is addressed later on in the video, but it bothered me so much that I had to pause it to point it out. Ugh.
It's more or less where it's supposed to be in relation to Africa (though it does look a little hastily placed). It looks like they just made a circle out of a Mercator projection, notice that Antarctica isn't pictured. Also, Russia/Siberia looks nearly twice the size of Africa, which it certainly is not. So the map is actually worse than the equator placement.
Just saw a video taken at the equator that seems to disagree with what is stated here. With my own eyes I saw it drain left and right within 30 feet of either side of the equator. The basin was the same. So ?
@Flearther McPlane No. You're an idiot. IT's a proven fact. I'll give you a million dollar if you could prove your statement!! They don't blow randomly. Take it from me. I'm a navigator and low pressure systems ALWAYAS blow counter clowckwise in the northern hemisphere and opposite in the south. Also high pressure systems blow clockwise in the northern hemishpere and opposite in the south. However they are not storm systems. Navigators (both pilots and mariners) study oceanography and metrology and this is a fact. Proven science. Go ahead and put this to a test and you'll see that this is true.
If you started draining a bucket or container on one side of the equator and ran to the other side, would the direction of the flow in which it was draining change due to coriolis effect or stay because of the momentum of the flow
so I have a couple of friends who have tried the water flushing different ways across the equator and report it as 'a thing' that happens.... (one of said friends has a science PhD from cambridge and used to do it regularly as a demonstration).. not to mention the numerous youtube demonstrations.. So.. If you say that this is not because of the Coriolis effect then i say fine.. but if you say this is 'bunk' but offer nothing more than I have to question you hank.. clearly there is something going on here..? or is everybody else simply mass hallucinating..?
I can assure you that it is entirely down to the shape of the toilet or basin. If you had the exact same toilet on either side of the equator, they will flush the same way. I learned about this during my Physics Masters when studying what effects the Earth's rotation has on everyday life.
Colin Bewley thanks for your comments. I remain unconvinced.. You write... " I learned about this during my Physics Masters when studying what effects the Earth's rotation has on everyday life." So maybe the effect in question is not as a result of the earths rotation...? I believe you are well intentioned but you are not known to me and you offer 'assurance' based on limited study and no personal experience.. I have already stated that two trusted friends have direct experience of this phenomenon.. one of them performing it repeatedly and possessing a higher qualification than you.. and there are numerous videos of the effect here on youtube.. In short.. for all the videos to be faked and all the people in them lying and my friends to be repeatedly confused I need more assurance than a stranger claiming to have sat a particular physics class.. As of yet I await any contradictory evidence.. any links you could suggest..?
paulflute Your personal and unverified anecdotal evidence is about as good as anyone else's youtube anecdotal evidence. As for videos found on youtube, there's also plenty of videos, even ones where they pull out a GPS to verify their location, where they test multiple sinks and toilets, with water draining the opposite of what you'd expect if there was a Coriolis effect on the water, to just going straight down the drain. It's all based on a shape of the basin and a few other forces, like movement of a drain plug or new water coming down at an angle.
paulflute My best suggestion is to merely look at the "thumbs up" on your comment, and see how its being drowned out by the contrary. Also, I am baffled to learn that Cambridge, IN has an online PhD course at all!! I respect your fight, but this is an instance of "pick your battles"... Cheers, and thanks for the conversation!
At 2:19 you show wind in both hemispheres deflecting the the right, but you say the opposite thing. But if your at the North pole facing the equator, then it's deflecting to the left. Is't this really just a point of view thing?
Hank, around 2:10 you say Winds flow from the poles which are naturally high pressure areas to the equator which is low pressure and back again. Did you get that backwards? Is the equator not high pressure and the poles are low pressure?
The effect on low pressure systems can be tricky to visualize. Think of the low as pressure gradient with the lines of force pointing directly toward the center. Initially still air starts to move directly inward from all directions, however air moving toward the equator is also getting farther from the Earth's rotational axis and must slow its rotation, while air moving toward the poles must increase its angular velocity around the Earth's rotational axis.
When I visited the equator with my family we did a little experiment. We took a bucket of water with a hole in the bottom and watched the drainage (using a matchstick to make it easier to observe) we walked about 10 paces north and it spun one way. Then we stopped the motion waked 20 paces south and let it flow again, the matchstick spun in the other direction. So I think that the effect can apply to small scale items.
The ball would travel at the speed you threw it minus the speed you are running, plus a few other factors like friction, wind resistance and whether or not you've sprained your ankle today. Relativity comes in with your point of view, and most speed measurements are made relative to the ground. So with the same throw in both directions, the ball is traveling the same speed. The only thing gravity affects is pulling it to the ground. Measure from a fixed point in space, though, then yes.
what about Ekman transport then? If its dependant on planet scale, how can it be implicated in the effect that causes ocean surface wind to cause ocean currents to flow 90 degrees to the right?
Thanks for clearing this misconception up for me. I have thought that toilets were effected by the Coriolis effect for years even before I was taught it in 9th grade science this year. I will let my teacher know.
Actually you can see this with a small amount of water. I live in Ecuador and there's a museum just over the line (measured with a gps) that shows the difference with a sink. They put it a meter to the north and the water flushes to one side, one meter to the south and it goes to the other. But EXACTLY over the line it goes straight down. I've seen it a million times.
I too have seen the exact thing the person above mentioned (note: I have never met or talked to this person). They put a few small leaves in the water so the flow can be seen better. The rotation of the water was much more than if they had directed the water when pulling the plug.
Australian toilets don't even swirl, they tumble. Aussie toilets are typically a dual flushing, water saving affair. I remember the first time I flushed an American toilet, it started to fill with water and I had an "oh shit" moment as I thought it was going to overflow.
Actually, depending on where you are on the planet, it does matter for (very) long range shots - read the Wikipedia article about external ballistics if you want to know why and remember that the bullets flight time at those distances might be up to 6 seconds. Of course we're talking about shifting the point of impact something like 5 cm at 1 km, but when your target is out +1000 meters and you've to hit with your first shots... being off 5-15 cm may be the difference between life and death.
You mentioned that the air flows from the poles to the equator, but then you showed a picture of air flowing from the equators to the poles. So which way is most significant? And how does it cause a counter clockwise air flow in the north, and clockwise flow in the south?
you know whats funny about language is that historically if everyone is wrong then the meaning on whatever they are wrong in will change - simply put if everyone is wrong it's suddenly right.
MrOuchiez No, actually. That's how the evolution of language works. There's no reason, at all, that it makes us 'dumber'. EDIT: Maybe do a regular scishow over th evolution of language. Don't think that's been done yet, and I think it'd be cool.
If you're very careful to put it on a perfectly flat and level surface it can affect the draining of a kiddie pool. I think it was on Veritasium that I saw that one.
@@jackcarter1382 why didn't McMillan take that shot he seems way more qualified than the person who had to be trained how to snipe on the very same mission.
How it it with pingpong balls floating above the drain in your sink? I heard they spin clock and coutnerclockwise depending o where you at.. It's a small object, but the direction of the flow shouldn't be determined by your sinks form and I remeber I read it in a childrens science book, so maybe that's true?
This. The scientific term, "Theory," is like one step short of being the opposite of the colloquial, "Theory" (the complete opposite, I guess, being, "Fact").
And facts are basically just really, really persistent theories. People always use the word "theory" when they mean "hypothesis" and it always pisses me off.
what about the Gustave Coriolis effect on plane flights and flight plans, and when bullets are shot at great distances? not mention of the effect of those things?
I knew this and was trying to explain it a few weeks back to some know it all in one of my classes. She told me I was lying and called me a stupid r-word. I'm going to show her this video; can't wait to see her reaction! :)
No he wasn't wrong. 'Not a big enough deal to influence toilets flushing out'. That's basicly the same conclusion than that of Veritasium and Smartereveryday
Dave David To quote Hank "It ( the coriolis effect ) isn't a big enough deal to affect a toilet which drains in 5 seconds, but it is enough to affect bigger and slower moving fluids". Now Veritasium & SmarterEveryday used a large and much much much slower moving fluid than in a toilet. I feel like they've misrepresented Hank since what they did only serves to prove his point, sinks and toilets are inconsistent; only if you minimize the variables to a small degree do you get the effect showing.
i just went to the "half of the world museum" in Ecuador and they made a demonstration were they flushed the exact same recipient and it went different ways on each hemisphere (measured was GPS) and in the exact equator water went strait down, now i´m kind of confused, can anyone explain me if it had anything to do with coriolis effect or if it was just a scam.
Please explain this discrepancy: My parents saw a demonstration when they were visiting in Africa at the equator line: the guide poured water to a bucket with a hole at the bottom. At one side it drained in one direction, at the equator line it drained down without swirling, and a few meters to the other side of the equator it swirled to the other side. The bucket didn't change, so why did the water swirl in different directions?
Thank you. That was very helpful and it made it much easier for me to picture in my head. I'm still a bit confused on the part where Hank said that the Coriolis Effect creates weather systems that rotate clockwise in the northern hemisphere and counter-clockwise in the southern hemisphere. Maybe I'm being hard headed today but I think that is where the mistake is. Large weather systems such as hurricanes like hurricane katrina rotate counter-clockwise in the northern hemisphere.
I don't know if you read comments on videos this old, but I'd like to suggest that you do an IDTIMWYTIM on "life expectancy." I just saw a documentary that said that almost no one lived past their thirties in the Middle Ages because the average life expectancy was late thirties. Or maybe just a video on what "average" means would do the trick!
2:15 - it's the other way round and not that simple. Cyclones have a low pressure center. The air moves toward this center, on the northern hemisphere the outer area near the equator is deflected to the right, which leads to a counter clockwise spin.
I was also confused about this for a bit, until I though of it this way. Instead of a solid globe, picture several conveyor belts, with the fastest at the equator. If you throw a ball north from the fastest conveyor belt, the ball will travel north as well a bit to the east (because it was thrown from a belt moving east). However, the conveyor belt it's now over is also moving east, just at a slower speed. So it can't catch up to the eastward movement of the ball. Therefore, the ball moves east.
I went to the equator once, and at this museum on the actual equator they had a rectangular basin with a drain right in the middle. when the drain was pulled while directly over the equator, the water flowed out without spiraling. when moved twenty feet to the left or right, the water had a small but noticeable spiral when draining. please explain
So, how big does a body of water have to be to get affected by the coriolis effect? What's the threshold? A small lake? A great lake? Or does it only apply to the oceans (and atmosphere)?
The two effects have are related but not quite the same: both are caused by the earth's rotation. While Foucault's pendulum is based solely on the earth moving below the (fixed) pendulum plane, coriolis effect is a combination of that and the conservation of angular momentum
It is not all that difficult to build a sink or something with a special shape, whose drain circles "wrong". But since most sinks and toilets are symmetric, the shape of the bowl has no influence. Thus, the Coriolis effect is still the dominating effect. Closely followed by pure chance, meaning that the same (normal, symmetrical) sink can also have the wrong direction sometimes and keep it, or be manipulated to drain wrong for some time then switching back. Any answer would be based on experience though, Navier-Stokes isn't one of the Millennium Problems for nothing.
Mass (like air) moving poleward is also moving nearer to the Earth's rotational axis and, like a spinning ice skater, must increase its angular velocity (move eastward faster) in order to maintain its angular momentum. This explains the rotation about both high and low pressure systems.
It depends on where it is (try it at the poles), how large it is and how calm the water has been. An ocean-sized aquarium would work ;) I don't know what Shamu's tank is, but if it rotates in itself, it will create coriolis Effect itself and not rely on that created by earth's rotation.
You should make an IDTIMWYTIM on cancer. I've heard so many ridiculous and surprisingly common misconceptions, like how cancer is actually many, many, MANY different things, not just one super evil little goblin virus and so forth.
Actually I do believe it would affect water in a sink. That's is if the water starts from a stationary state (not moving*) and the sink is completely circle-symmetrical. That way there would be 2 forces on the water particles: gravity pulling in down the drain and the Coriolis Effect pulling it to the side. (and some minor friction and stuff, which will be equal everywhere). Thus resulting in a different flowing direction in Belgium than in Australia.
What if you could remove all random effects and the coriolis effect was the only significant force acting on it? Would it have an equal chance of spinning either way like Jesse Bolt commented to me, or would it always go the same way however slightly? Would it even be noticeable?
Picture the winds (mass of air) moving north on my avatar along the right limb from the equator toward the north pole. You can see that they get closer to the rotational axis which is vertical through the center of the picture. Like a skater pulling in her arms, the winds must rotate around the axis faster in order to maintain angular momentum, and are thus deflected to the east. Motion north or south doesn't really matter -- it's the motion toward or away from the rotational axis.
EigenvectorSeven below is right. The water entering the toilet just diplaces whatever is sitting in the bowl. Yes it is less elegant and there is more splashing but it is a cheaper mechanism and there is less likelihood of return floating items.
I still don’t understand how the wind changes directions instead of going straight up or down, I understand that its because of the Earth’s rotation but I dont know how exactly does it change. Another question is, how else can the Coriolis affect affect winds? Thank you! (This is for my science project)
BUT: relative to itself (and everything within its atmosphere) the earth isn't spinning. It just spins relative to object further away like the moon or the sun. Relative to itself it is stationary and therefore couldn't affect anything within it. Please correct me if im wrong
It is also believed that the coriolis effect may have influence in the mantle magmatic movement, there are researches that shows that patterns on some hydrothermal ore deposits are caused by this effect, very interesting as well.
Sorry double reply you but I still can't make sense of the image at 2:17. Given that the earth spins to the east those winds (arrows) should deflect to the left side of the globe. If I'm wrong please explain just to clear my doubts. It seems that you know much more than I do.
But Still Hank, I just tried to fill up my sink and let it flow. It started to spin clockwise. Then, with my hand I provoked a counter-clock wise spin, took out my hand and the spin slowly stopped and started clock-wise again. I then tried it in all my sinks, toilet, bathtube... AND I made a hole on the bottom of a bucket and tested the same.... same results.... Are all northen hemisphere water recipients made pruposfully to make water spin clock wise ? Must be something else....
It only works if there is a difference in rotational speed between the two points. But the difference in rotational speed still only matters as the material passes from one speed to the other. Basically, if your sink near the equator was 2 meters across, the water would travel one meter north to reach the drain. The difference in speed is about .068 millimeters per hour. That requires an entire meter of travel to get that speed difference. How insignificant is that compared to drain speed?
Okay so if a hurricane is formed in the southern hemisphere and crosses into the northern hemisphere is the coriolis effect strong enough to effect it in some way?
![Noob To Max With DRAGON REWORK In Blox Fruits [FULL MOVIE]](http://i.ytimg.com/vi/LnBMOinoOvA/mqdefault.jpg)
As far as I know, on the Northern Hemisphere winds rotate counter-clockwise, not clockwise as stated in the video (just look up some satellite images of cyclons). Yes, the Coriolis Force will deflect air traveling on the northern hemisphere to the right, however that means that if you stand in such a way that wind is blowing on your back, the area of low pressure will be on your left hand (since the traveling air will be deflected to the right). Because wind will blow from the area of high pressure to the area of low pressure, it will spin counter clockwise (to the left) on the Northern Hemisphere and clockwise (to the right) on the Southern Hemisphere.
You got it right!! I'm a navigator and this is a correct. Spot on!!
Diving deeper into wind turbines and I got confused by the video. Kowalski, agree
Yes, areas of Low Pressure in the Northern Hemisphere include winds flowing counter clockwise around them. Winds flow clockwise around Low pressure systems in the Southern Hemisphere. It's the opposite for wind flow around areas of High Pressure: winds flow clockwise around Highs in the N. Hemisphere.
Does anyone else feel like the equator in this is way too low?
I think the map is just using a weird projection... which is weird since it's depicting a sphere (or to put it in another way, it's a picture of the globe rather than a map of the globe), you'd think it'd be easy to get it right.
Actually it just looks like someone cut up a circle out of a normal Mercator world map (which tends to emphasize the northern hemisphere, making it look huge in comparison to the southern).
Edit: I checked and yeah, the equator is correct according to the landmasses but the map itself is distorted so it looks like it's wrong. (And it's wrong on the circle since it should be in the middle.)
Tuuliska Also there's no Antarctica which throws it off even more.
I checked google earth and the equator is correct in this vid. I think it looks weird because I'm used to seeing the equator as it crosses South America and it somehow looks higher when it's got most of the wide part of the continent under it as opposed to having the wide part of Africa on top of it. Just a guess but the brain is funny that way. But it is right as shown here.
Actually, the equator is in the right place in relation to the continents, but 60 degrees N is waaay too high. It should cut just about through Stockholm, Sweden; Oslo, Norway; Helsinki, Finland; and St. Petersberg, Russia. Or at least come really close to these cities. On the other side of the "map", 60 degrees N should cut off the Kamchatka Peninsula just a bit south of where it meets the rest of Russia.
Yeah, that's some mad Eurocentricism for ya, they need to bump the land masses up where they belong! Bad graphic design perpetuating some bad distortions of who/where is the most important on the globe...
Two mistakes in this video. The "circumference" of the Earth at the Equator is 40,076 km, not the diameter.
Second, storms in the Northern Hemisphere rotate counter-clockwise, not clockwise. That means that low pressure systems that produce hurricanes or cyclones in the Northern Hemisphere rotate counter-clockwise.
+Flearther McPlane
"Storms rotate which ever way the pressure systems and other variables dictate, a Coriolis effect not being one of them."
Nope, wrong. If it was just whatever random set of variables happened to be present at the time that a low pressure weather system developed that determined which way the system rotated, then we should expect to see at least some low pressure weather systems north of the equator rotate clockwise, and occasionally see some low pressure weather systems south of the equator rotate counter-clockwise. However, we never see that. ALL low pressure weather systems north of the equator rotate counter-clockwise, and ALL low pressure weather systems rotate clockwise south of the equator. Only the Coriolis effect explains that duality.
+Flearther McPlane
"The history of Hurricanes show both directions on either side of the equator."
Prove it. Give us some details - dates, names and locations - about these hurricanes and typhoons that spun the opposite way that the Coriolis effect predicts.
Tornadoes have a more random spin. They are relatively small, short lived phenomena that are less affected by the Coriolis effect and more by the characteristics of the storm that spawns them. However, hurricanes and typhoons always spin counter-clockwise north of the equator, and clockwise south of the equator.
Here is a website you can use to track these storms and check them out for yourself.
severe.worldweather.wmo.int/
@Flearther McPlane Amen Bro
@Flearther McPlane what are prevailing winds
@Flearther McPlaneLiterally the exact word for word answer you get when you Google prevailing wind. Why is there prevailing wind. Don't just Google it, show you understand it.
1:50 Hank says the coriolis effect does affect "bigger, slower moving fluids." The experiment Veritasium and Smarter Every Day conducted proved the same thing
Except that a kiddie pool probably was probably still much smaller than the scale that Hank was thinking of and referring to, but it worked with the right conditions of still water and no other effects present. It's just a _very_ small force at that scale.
Dude, I'm not real finicky usually, but your equator is killing me, it's so not middle. Anyone else just hurting deep down when they see this?
YES! That equator IS killing me! Along with the "60 degrees north" line!
I have a question: since time is relative to the velocity at which something moves. Does that mean that people who live in Texas experience time slower compared to let's say a scientist living on the north pole?
Kevin J
Replying mostly because I want the answer and Google just throws maths at me. My own thinking throw one big wrench in the experiment: the gravity vary depending where you are on Earth because it is not a perfectly sphere and it's density is not the same everywhere either. Let say Earth was a perfectly homogeneous sphere not affected by any outside force like the Moon and Sun's gravity, but still spinning on its axis like it does now.
In that case I wonder how much the centrifugal force of someone at the equator will lessen the effect of gravity and therefore speedup their time relative to someone at the pole. Will the two effects, speed and lesser gravity, cancel each other?
I'm real butt hurt over this. pretty frustrating...
SlyPearTree I would like to know why the coriolis effect doesn't affect hovering helicopters. Even Mr Coriolis might consider scrapping his theory if he did not observe a helicopter waiting for it's destination to rotate to it. 🙀🤦♂️🙀🤦♂️🙀🤦♂️
Veritasium & SmarterEveryday brought me here
Vania Desmonda Gizmodo brought me to the Veritasium & SmarterEveryday video =)
Me to!
Vania Desmonda same here!
wrr
Vania Desmonda THE EARTH IS FLAT
At 52 seconds. Could you not have used any other map projection. The Mercator projection is super unhelpful for globes, or their likenesses. Check out that equator you drew; definitely not in the middle of the circle...
+ SRSLY tho
2:16
This picture seems to imply that hurricanes rotate clockwise in the northern hemisphere, but isn’t it the opposite?
What about the “museums” on the equator when you go 10m north the water drain one way and you go 10 south it drains the other way?
Easily influenced by how the water is poured. I watched a guy do it, and the customers were too busy watching the straws floating in the middle of the bowl, to notice that the guy pouring the water poured it three different ways, aiming slightly left, slightly right or in the middle depending on where he was standing and what he wanted the customers to see. 10 metres is nothing.
NO JOKE I NEEDED TO KNOW WHAT THIS WAS THE OTHER DAY. YOUR TIMING IS FREAKING PERFECT OH MYYYYYYY
I'm so confused. I'm in Biology right now and my roommate is an oceanography major, both of our books say that in the north it is counter-clockwise and in the south it is clockwise. I read various resources online and some support this idea while some don't...... please help! Which is right?!
Joan Mae in northern hemisphere, the clouds around hurricane rotate counter clockwise around the eye. But the Foucault pendulum in northern hemisphere rotates clockwise. So the standard cliche explanations must need more explanation to account for the motion around the eye of hurricane. I visualized both and that's how I see it. That is they appear to contradict each other.
+Flearther McPlane
" Full Moon in the day time, really?"
What do you mean by "day time"? We never see a full moon, for instance, at noon. It simply does not happen. You will see an almost full moon just before sunset, or just before sun rise, but you will never see a 100% full moon in the sky at the same time as the sun.
+Flearther McPlane
"Viewing Venus in the middle of the night. Really?"
No, that isn't right either. We never see Venus at midnight, in the "middle of the night". The farthest Venus ever gets from the sun is 45 degrees, so just before sunrise or just after sunset, Venus can be seen halfway between the horizon and directly overhead.
+Flearther McPlane
"Tides on a single coast, 2' in one place and 24' just up the way. 4 tidal changes in one place and 2 in others. Tides do NOT react in any way in accordance with the Lunar body. Never have, never will."
More misrepresentation. What do you mean by "just up the way"? The timing and approximate height of a tide can be predicted years in advance by analyzing the positions of the sun and moon. However, the exact height of a tide has more to do with the topography of the coast line than anything else. The highest tides in the world, in the Bay of Fundy in Canada, are caused by the water piling up as it surges into a bay that gets progressively narrower and narrower. The height of the tide in the mouth of the bay is about 10 feet, while the height of the tide at the narrowest point at the north end of the bay can exceed 50 feet. All of the highest tides in the world share the same topography, a long bay with a wide mouth that progressively narrows down.
We can precisely predict when a tide will occur anywhere by tracking the positions of the sun and moon, but the exact height of the tide varies by a location's topography.
+Flearther McPlane
"In fact, if you go outside to observe a lot of things, you'll realize the absurdity of a multitude of misinformation in scholastic text."
If you live south of the equator, you only have to spend one evening observing the night sky to know that the earth is not flat. When looking north from north of the equator, all of the stars appear to rotate counter-clockwise around Polaris, in accordance with the flat earth model. However, when looking SOUTH from SOUTH of the equator, you see a completely different set of stars, rotating around a different point in the sky, and rotating in the opposite direction, clockwise around the south celestial pole instead of counter-clockwise around Polaris as the northern stars do. You can't even see Polaris from south of the equator. Flat earth busted.
you know what I love about your channel: you explain so many things that Sheldon says from the Big Bang Theory, and you make it easily understandable.
Just for fun: if the Coriolis effect was strong enough to affect toilets wouldn't it cause mini whirlpools in your bloodstream? Or make your pee veer off to one side? :)
dude i know that u said it for fun, but for blood it is part of a sentient being
and moves with it so it wont yeah
Oh man I really don’t know if that pee thought was necessary
I saw videos of experiments from countries on the equator demonstrating that water don't rotate when drained exactly on the equator with smaller basins, clockwise if the basin is moved slightly to the north, and counter-clockwise when drained slightly south of the equator.
He made a mistake at 2:20 and on. He states that weather systems in the Northern Hemisphere rotate clockwise and counterclockwise in the Southern Hemisphere. That's wrong. Weather systems in the Northern Hemisphere rotate counterclockwise and in the Southern Hemisphere they rotate clockwise.
Doesn't it depend if it is a high or low pressure system?
IamGrimalkin NO... the type of system makes NO difference as to the direction of rotation. At the equator, there is little to no rotation and creates an area called the doldrums where really no cyclones (neither hurricanes nor tornadoes) exist. Source: I have a BS in Geography.. A high pressure systems act like a "hill" , low pressure systems act ,like a "valley", moisture will move into low pressure systems and away from high pressure systems. So, if I have high pressure in the west, and low pressure in the east, the system will have a vector of moving from west to east. The magnitude of the vector is dictated by the isobars(measures pressure gradients) distance from each other. If the isobars are close together, the force is strong, if the isobars are further apart, the force is weaker. The isobars dictate the rate of change of pressure. This vector is also ADDED to the vector that is the "general circulation of the atmosphere" , which he began to explain in speaking about how stuff moves back and forth from the poles to the equator, this would be the predominant movement but for the Coriolis effect, which causes a curve when the rotational vector and the vertical vectors combine. There are many things at play in weather patterns but it's mostly the general circulation of the atmosphere, the tilt of the earth and it's angle of incidence of the suns rays with the earth, and the thermal/pressure gradients that result from the pressure/temperature differentials caused by where the suns rays are and are not hitting. It also has to do with the density of the atmosphere, the size of the particles the light is passing through, the albeto effect... it goes on and on. It's not a simple answer in the nitty gritty of it.
fordfiveohh Yeah, air does move away from high pressure systems and towards low pressure systems. And the Coriolis force curves things to the right in the northern hemisphere and the left in the southern hemisphere.
When air is moving outwards, "to the left" is anticlockwise, whereas when it is moving inwards, "to the left" is clockwise.
Counterclockwise in north!
According to weather maps, it most definitely DOES matter the type of system.
earth.nullschool.net/
I love you , I love you, I love you! The Earth Science regents are in 5 days and I'm panicking because I was an idiot and left months of studying to the last minute. And now I have to spend 10 months of lessons into my head in just 5 days. *THANK YOU!!!*
Doesn't it spin counter clockwise in the northern hemisphere and vice versa?
Captain Deadpool did you not watch the video
@@brandonhernandez371 Captain Deadpool was right. The low pressure systems ALWAYS rotate counter clockwise in the northern hemisphere and opposite in the south. Similarly the high pressure systems blow clockwise in the north and counter clockwise in the southern hemisphere.
This fact is known to all navigators in the air and on the sea. We rely on this fact to determine where to best go in case we have to stear away from the systems. THIS IS A FACT and I know this because I'm a navigator. Check out the next weather report on your local tv station and you'll see it. I will give 1.000.000 USD to the one who can disprove this fact!! I dare you!!!! Heck. I double dare you :)
@@boanthun Yeah what kind of credentials does this guy with a crappy channel name have? I bet his credentials don't mean what he thinks they mean...doh!
@@neonether What you said......
They're right but their explanation was contrary. If the Coriolis can affect hurricanes then it'll affect something even smaller. Basically, while it affects swirel rotation other things can have a far larger influence and thus counter act or reinforce the Coriolis affect.
Scishow! Hey! There is a large misunderstanding of aviation and parachute in the media (weird, right?) and I think it would be cool to do a show on BASE jumping, 'what if the parachute doesn't come out'? which pretty much ever happens, it's more complicated than that. Or 'what if the engine stops?' no, it does't just fall out of the sky, etc. I have a degree in aero, and I am a professional parachutist. If you are interested, I would love to help! PS- I love your show (space, etc) and thank you for being awesome. Communicating science is one of the more important things ever. -Calvin.
Wow - talk about timely.
I'm an Australian who just happens to have flown over to the US over the weekend and it was literally yesterday that I had exactly the same thought you opened your video with.
Now if I just knew why the designs of toilet bowls differed so much from the US to Australia, that would be one less irritating, trivial detail for my brain to lock on to. :)
The map at 0:54 was fucked up, dude. I live on the 62 N latitude, which according to you, is in the middle of the Arctic sea.
Haha, that's true! The line is even higher than 75 N.
And the equator was like a hipsters pants line
yeah, straight wrong. Shows a lil' too much bias towards that Northern Hemisphere, eh?
Related to the Coriolis Effect (maybe?) is that if you drop something down the center of a very deep mine shaft it will *not* hit the bottom directly, instead hitting and bouncing down the western side of shaft. They have actually done this for instance in the super deep mines in Russia.
This is more likely related to the fact that the center of gravity of the Earth is NOT the center of the Earth. It's slightly off-center. Idk, might be a combination of both too. Idek where to look for an answer to this 🤷♂️. Perhaps a geologist would know?
I know how it made it into common understanding: THE SIMPSONS STARTED IT, with bart and lisa having a toothpaste race in their sink.
The equator at 0:53 is drawn CORRECTLY in regards to the continents shown, but INCORRECTLY in regards to the shape of the earth.
Which means the landmasses are shifted (northwards) on that globe from where they actually should be.
+ Yeah, I worry that it over emphasizes Europe and downplays Africa, makes me nervous...
I remember a long while back on the Simpsons, they went to Australia over something Bart did and that's where that myth started for me. Thanks for clearing this up.
2:15 doesn't the arrows go in the opposite direction since low pressure does go anti-clockwise and to add .....from the equator forming the Hadley cell where its starts as low pressure?
The equator at 0:52 is anything but along the middle of the earth, I don't know if this is addressed later on in the video, but it bothered me so much that I had to pause it to point it out. Ugh.
It's more or less where it's supposed to be in relation to Africa (though it does look a little hastily placed). It looks like they just made a circle out of a Mercator projection, notice that Antarctica isn't pictured. Also, Russia/Siberia looks nearly twice the size of Africa, which it certainly is not. So the map is actually worse than the equator placement.
+ Yeah, map is bad, ttly showing a Northern Hemisphere preference...
Just saw a video taken at the equator that seems to disagree with what is stated here. With my own eyes I saw it drain left and right within 30 feet of either side of the equator. The basin was the same. So ?
So the Coriolis effect is nothing more than the preservation of inertia inside a system with a GRADIENT of inertia?
Stefan Badragan is it only inertia of motion simple
@Flearther McPlane No. You're an idiot. IT's a proven fact. I'll give you a million dollar if you could prove your statement!! They don't blow randomly. Take it from me. I'm a navigator and low pressure systems ALWAYAS blow counter clowckwise in the northern hemisphere and opposite in the south. Also high pressure systems blow clockwise in the northern hemishpere and opposite in the south. However they are not storm systems. Navigators (both pilots and mariners) study oceanography and metrology and this is a fact. Proven science. Go ahead and put this to a test and you'll see that this is true.
If you started draining a bucket or container on one side of the equator and ran to the other side, would the direction of the flow in which it was draining change due to coriolis effect or stay because of the momentum of the flow
so I have a couple of friends who have tried the water flushing different ways across the equator and report it as 'a thing' that happens.... (one of said friends has a science PhD from cambridge and used to do it regularly as a demonstration).. not to mention the numerous youtube demonstrations.. So.. If you say that this is not because of the Coriolis effect then i say fine.. but if you say this is 'bunk' but offer nothing more than I have to question you hank.. clearly there is something going on here..? or is everybody else simply mass hallucinating..?
I can assure you that it is entirely down to the shape of the toilet or basin. If you had the exact same toilet on either side of the equator, they will flush the same way. I learned about this during my Physics Masters when studying what effects the Earth's rotation has on everyday life.
Colin Bewley thanks for your comments. I remain unconvinced.. You write...
" I learned about this during my Physics Masters when studying what effects the Earth's rotation has on everyday life."
So maybe the effect in question is not as a result of the earths rotation...?
I believe you are well intentioned but you are not known to me and you offer 'assurance' based on limited study and no personal experience..
I have already stated that two trusted friends have direct experience of this phenomenon.. one of them performing it repeatedly and possessing a higher qualification than you.. and there are numerous videos of the effect here on youtube..
In short.. for all the videos to be faked and all the people in them lying and my friends to be repeatedly confused I need more assurance than a stranger claiming to have sat a particular physics class.. As of yet I await any contradictory evidence.. any links you could suggest..?
paulflute Your personal and unverified anecdotal evidence is about as good as anyone else's youtube anecdotal evidence.
As for videos found on youtube, there's also plenty of videos, even ones where they pull out a GPS to verify their location, where they test multiple sinks and toilets, with water draining the opposite of what you'd expect if there was a Coriolis effect on the water, to just going straight down the drain. It's all based on a shape of the basin and a few other forces, like movement of a drain plug or new water coming down at an angle.
paulflute
My best suggestion is to merely look at the "thumbs up" on your comment, and see how its being drowned out by the contrary. Also, I am baffled to learn that Cambridge, IN has an online PhD course at all!! I respect your fight, but this is an instance of "pick your battles"... Cheers, and thanks for the conversation!
Colin Bewley So why are all toilet's and sinks etc, made in a different way in the southern hemisphere, just to fuck with us?
At 2:19 you show wind in both hemispheres deflecting the the right, but you say the opposite thing. But if your at the North pole facing the equator, then it's deflecting to the left. Is't this really just a point of view thing?
I would love to see a IDTIMWYTIM on Hypothesis vs. Theory.
Hank, around 2:10 you say Winds flow from the poles which are naturally high pressure areas to the equator which is low pressure and back again. Did you get that backwards? Is the equator not high pressure and the poles are low pressure?
Could you do an episode on the Doppler effect?
The effect on low pressure systems can be tricky to visualize. Think of the low as pressure gradient with the lines of force pointing directly toward the center. Initially still air starts to move directly inward from all directions, however air moving toward the equator is also getting farther from the Earth's rotational axis and must slow its rotation, while air moving toward the poles must increase its angular velocity around the Earth's rotational axis.
When I visited the equator with my family we did a little experiment. We took a bucket of water with a hole in the bottom and watched the drainage (using a matchstick to make it easier to observe) we walked about 10 paces north and it spun one way. Then we stopped the motion waked 20 paces south and let it flow again, the matchstick spun in the other direction. So I think that the effect can apply to small scale items.
The ball would travel at the speed you threw it minus the speed you are running, plus a few other factors like friction, wind resistance and whether or not you've sprained your ankle today. Relativity comes in with your point of view, and most speed measurements are made relative to the ground. So with the same throw in both directions, the ball is traveling the same speed. The only thing gravity affects is pulling it to the ground. Measure from a fixed point in space, though, then yes.
Please do an IDTITWYTIM episode on the phrase "scientifically proven". Please!
When I (Australian) was in the US, I was so scared of how high the toilet water gets to notice what way it spins. Your toilets are so full!
I blame Lisa Simpson for all this.
what about Ekman transport then? If its dependant on planet scale, how can it be implicated in the effect that causes ocean surface wind to cause ocean currents to flow 90 degrees to the right?
Thanks for clearing this misconception up for me. I have thought that toilets were effected by the Coriolis effect for years even before I was taught it in 9th grade science this year. I will let my teacher know.
Actually you can see this with a small amount of water. I live in Ecuador and there's a museum just over the line (measured with a gps) that shows the difference with a sink. They put it a meter to the north and the water flushes to one side, one meter to the south and it goes to the other. But EXACTLY over the line it goes straight down. I've seen it a million times.
50,000 PEOPLE USED TO LIVE HERE
now it is a ghost town
"Shock and blood loss will do the rest," he said...
@@youssafsu2307 "coriolis effect" he said, I didn't even know what that was
I too have seen the exact thing the person above mentioned (note: I have never met or talked to this person). They put a few small leaves in the water so the flow can be seen better. The rotation of the water was much more than if they had directed the water when pulling the plug.
Australian toilets don't even swirl, they tumble.
Aussie toilets are typically a dual flushing, water saving affair.
I remember the first time I flushed an American toilet, it started to fill with water and I had an "oh shit" moment as I thought it was going to overflow.
Haha lol movement for you
Actually, depending on where you are on the planet, it does matter for (very) long range shots - read the Wikipedia article about external ballistics if you want to know why and remember that the bullets flight time at those distances might be up to 6 seconds.
Of course we're talking about shifting the point of impact something like 5 cm at 1 km, but when your target is out +1000 meters and you've to hit with your first shots... being off 5-15 cm may be the difference between life and death.
That equator looked a little low.
+ Redix
You mentioned that the air flows from the poles to the equator, but then you showed a picture of air flowing from the equators to the poles. So which way is most significant? And how does it cause a counter clockwise air flow in the north, and clockwise flow in the south?
IDTIMWYTIM on the word "Literally" because people seem to use that word wrong a lot nowadays
you know whats funny about language is that historically if everyone is wrong then the meaning on whatever they are wrong in will change - simply put if everyone is wrong it's suddenly right.
Laerz Zyziz
Which constantly makes us dumber, communicatively.
MrOuchiez No, actually. That's how the evolution of language works. There's no reason, at all, that it makes us 'dumber'.
EDIT: Maybe do a regular scishow over th evolution of language. Don't think that's been done yet, and I think it'd be cool.
If you're going to correct someone on a grammatical infraction, I believe you meant "incorrectly".
quak :3
Oh god another one. Here, watch this.
www.merriam-webster.com/video/0038-literally.html
If you're very careful to put it on a perfectly flat and level surface it can affect the draining of a kiddie pool. I think it was on Veritasium that I saw that one.
i came here becauese of captain mc mallian from cod 4
IabuseTheM16 _ MISSION FAILED WILL GET EM NEXT TIME oops wrong game
AqWha Water at this distance, you’ll have to take the coriolis effect into consideration
@@jackcarter1382 why didn't McMillan take that shot he seems way more qualified than the person who had to be trained how to snipe on the very same mission.
@@cheesestyx945 because video game logic😂
Yay! I hope these keep coming. I missed this series!
The Simpsons brought me here
Aha same here lol
How it it with pingpong balls floating above the drain in your sink? I heard they spin clock and coutnerclockwise depending o where you at.. It's a small object, but the direction of the flow shouldn't be determined by your sinks form and I remeber I read it in a childrens science book, so maybe that's true?
water does drain in different directions in the different hemispheres, but that's not due to the coriolis effect... :3
The word "theory". Please make a vid on this (unless you already did with biology.
This. The scientific term, "Theory," is like one step short of being the opposite of the colloquial, "Theory" (the complete opposite, I guess, being, "Fact").
And facts are basically just really, really persistent theories.
People always use the word "theory" when they mean "hypothesis" and it always pisses me off.
what about the Gustave Coriolis effect on plane flights and flight plans, and when bullets are shot at great distances? not mention of the effect of those things?
My fiancee and i just had a 10 min convo about the pic at 0:41. :)
Yeah, SRSLY tho, wildy inaccurate
More like this one please!!
"Hey, Australian people"
OOH OOH THAT'S ME! HI HANK!!
I knew this and was trying to explain it a few weeks back to some know it all in one of my classes. She told me I was lying and called me a stupid r-word. I'm going to show her this video; can't wait to see her reaction! :)
You were wrong!! Proved by Veritasium and SmarterEveryday
Dave David Well he was right about the toilets and sinks :3
Dave David He wasn't wrong at all... re-watch the video. The videos corroborate each other...
Eagles13 But he said it will only have an effect on weather patterns?
No he wasn't wrong. 'Not a big enough deal to influence toilets flushing out'. That's basicly the same conclusion than that of Veritasium and Smartereveryday
Dave David To quote Hank "It ( the coriolis effect ) isn't a big enough deal to affect a toilet which drains in 5 seconds, but it is enough to affect bigger and slower moving fluids". Now Veritasium & SmarterEveryday used a large and much much much slower moving fluid than in a toilet. I feel like they've misrepresented Hank since what they did only serves to prove his point, sinks and toilets are inconsistent; only if you minimize the variables to a small degree do you get the effect showing.
why would there be higher pressures at the poles where it's cold?
wouldn't the hotter air carry more pressure?
i just went to the "half of the world museum" in Ecuador and they made a demonstration were they flushed the exact same recipient and it went different ways on each hemisphere (measured was GPS) and in the exact equator water went strait down, now i´m kind of confused, can anyone explain me if it had anything to do with coriolis effect or if it was just a scam.
if a airplane takes off in texas and flys du North at 300 mph. does it need to keep correcting its self to maintain a straight line?
Please explain this discrepancy:
My parents saw a demonstration when they were visiting in Africa at the equator line: the guide poured water to a bucket with a hole at the bottom. At one side it drained in one direction, at the equator line it drained down without swirling, and a few meters to the other side of the equator it swirled to the other side.
The bucket didn't change, so why did the water swirl in different directions?
Wait so if you throw the ball in a straight line from the equator it would appear to move left but wind coming from the equator appears to move right.
Thank you. That was very helpful and it made it much easier for me to picture in my head. I'm still a bit confused on the part where Hank said that the Coriolis Effect creates weather systems that rotate clockwise in the northern hemisphere and counter-clockwise in the southern hemisphere. Maybe I'm being hard headed today but I think that is where the mistake is. Large weather systems such as hurricanes like hurricane katrina rotate counter-clockwise in the northern hemisphere.
0:43 Is it just me or is the equator a bit too low on this image?
oh wow. That's mindblowing. Is there any video of it?
I don't know if you read comments on videos this old, but I'd like to suggest that you do an IDTIMWYTIM on "life expectancy." I just saw a documentary that said that almost no one lived past their thirties in the Middle Ages because the average life expectancy was late thirties. Or maybe just a video on what "average" means would do the trick!
2:15 - it's the other way round and not that simple. Cyclones have a low pressure center. The air moves toward this center, on the northern hemisphere the outer area near the equator is deflected to the right, which leads to a counter clockwise spin.
Exactly what I thought Michael. Does that mean this video is inaccurate at the end?
Michael is exactly right - I think this guy just mispoke at the end when he said the opposite.
can someone explain to me how the coriolis effect deflects the winds to the right in the northern hemisphere yet cyclones spin counter clockwise?
***** this was very helpful. thank you. it makes sense now.
I was also confused about this for a bit, until I though of it this way. Instead of a solid globe, picture several conveyor belts, with the fastest at the equator. If you throw a ball north from the fastest conveyor belt, the ball will travel north as well a bit to the east (because it was thrown from a belt moving east). However, the conveyor belt it's now over is also moving east, just at a slower speed. So it can't catch up to the eastward movement of the ball. Therefore, the ball moves east.
Seems like the arrows are showing clockwise in the north and counterclockwise in the south. Isn’t the opposite true?
I went to the equator once, and at this museum on the actual equator they had a rectangular basin with a drain right in the middle. when the drain was pulled while directly over the equator, the water flowed out without spiraling. when moved twenty feet to the left or right, the water had a small but noticeable spiral when draining.
please explain
So, how big does a body of water have to be to get affected by the coriolis effect? What's the threshold? A small lake? A great lake? Or does it only apply to the oceans (and atmosphere)?
The two effects have are related but not quite the same: both are caused by the earth's rotation. While Foucault's pendulum is based solely on the earth moving below the (fixed) pendulum plane, coriolis effect is a combination of that and the conservation of angular momentum
It is not all that difficult to build a sink or something with a special shape, whose drain circles "wrong". But since most sinks and toilets are symmetric, the shape of the bowl has no influence. Thus, the Coriolis effect is still the dominating effect. Closely followed by pure chance, meaning that the same (normal, symmetrical) sink can also have the wrong direction sometimes and keep it, or be manipulated to drain wrong for some time then switching back. Any answer would be based on experience though, Navier-Stokes isn't one of the Millennium Problems for nothing.
Theres a video demonstration on youtube at the equator that shows it does spin differently
Mass (like air) moving poleward is also moving nearer to the Earth's rotational axis and, like a spinning ice skater, must increase its angular velocity (move eastward faster) in order to maintain its angular momentum. This explains the rotation about both high and low pressure systems.
It depends on where it is (try it at the poles), how large it is and how calm the water has been. An ocean-sized aquarium would work ;)
I don't know what Shamu's tank is, but if it rotates in itself, it will create coriolis Effect itself and not rely on that created by earth's rotation.
You should make an IDTIMWYTIM on cancer. I've heard so many ridiculous and surprisingly common misconceptions, like how cancer is actually many, many, MANY different things, not just one super evil little goblin virus and so forth.
I was just wondering if anyone had mentioned that! It was really putting me off how far south that line was of the actual equator...
My University is making me watch Hank Green for my Atmospheric Science class? I'm excited. I'll actually learn something!
Actually I do believe it would affect water in a sink. That's is if the water starts from a stationary state (not moving*) and the sink is completely circle-symmetrical.
That way there would be 2 forces on the water particles: gravity pulling in down the drain and the Coriolis Effect pulling it to the side. (and some minor friction and stuff, which will be equal everywhere).
Thus resulting in a different flowing direction in Belgium than in Australia.
What if you could remove all random effects and the coriolis effect was the only significant force acting on it? Would it have an equal chance of spinning either way like Jesse Bolt commented to me, or would it always go the same way however slightly? Would it even be noticeable?
Picture the winds (mass of air) moving north on my avatar along the right limb from the equator toward the north pole. You can see that they get closer to the rotational axis which is vertical through the center of the picture. Like a skater pulling in her arms, the winds must rotate around the axis faster in order to maintain angular momentum, and are thus deflected to the east. Motion north or south doesn't really matter -- it's the motion toward or away from the rotational axis.
EigenvectorSeven below is right. The water entering the toilet just diplaces whatever is sitting in the bowl. Yes it is less elegant and there is more splashing but it is a cheaper mechanism and there is less likelihood of return floating items.
Superb explanation sir
I'm from India.
I still don’t understand how the wind changes directions instead of going straight up or down, I understand that its because of the Earth’s rotation but I dont know how exactly does it change. Another question is, how else can the Coriolis affect affect winds? Thank you! (This is for my science project)
I second this. You already do quite a bit of this kind of thing anyway, it'd be nice to see it all drawn together and built upon.
BUT: relative to itself (and everything within its atmosphere) the earth isn't spinning. It just spins relative to object further away like the moon or the sun. Relative to itself it is stationary and therefore couldn't affect anything within it. Please correct me if im wrong
It is also believed that the coriolis effect may have influence in the mantle magmatic movement, there are researches that shows that patterns on some hydrothermal ore deposits are caused by this effect, very interesting as well.
Sorry double reply you but I still can't make sense of the image at 2:17. Given that the earth spins to the east those winds (arrows) should deflect to the left side of the globe. If I'm wrong please explain just to clear my doubts. It seems that you know much more than I do.
But Still Hank, I just tried to fill up my sink and let it flow. It started to spin clockwise. Then, with my hand I provoked a counter-clock wise spin, took out my hand and the spin slowly stopped and started clock-wise again. I then tried it in all my sinks, toilet, bathtube... AND I made a hole on the bottom of a bucket and tested the same.... same results....
Are all northen hemisphere water recipients made pruposfully to make water spin clock wise ? Must be something else....
It only works if there is a difference in rotational speed between the two points. But the difference in rotational speed still only matters as the material passes from one speed to the other. Basically, if your sink near the equator was 2 meters across, the water would travel one meter north to reach the drain. The difference in speed is about .068 millimeters per hour. That requires an entire meter of travel to get that speed difference. How insignificant is that compared to drain speed?
Okay so if a hurricane is formed in the southern hemisphere and crosses into the northern hemisphere is the coriolis effect strong enough to effect it in some way?
I can't find the video you are linking to. Can you please check the link so I can try to figure out the problem?