+The Science Asylum Scientific videos in which I cannot see any mistakes are rare. You clearly know your subject intimately and understand it with clarity.
No idea which way does my toilet flush :)) In any case, you explained it in a way that we all can understand it. Didn't knew the part with the Ecuator area. Well done, Nick.
I truly love your videos!! Each one makes me a little bit crazier!! Wow! I just noticed this is Spinning Clone's birth. He is my favorite clone so i am honored to witness his first appearance.
Looking at the hurricane map, there is a very noted difference between frequency between the North Atlantic and North Pacific Oceans. The Southern Oceans show even more of an oddity where it looks like South America uses some sort of hurricane repulsive device to keep them at bay (pun intended)
Simply put; the rotation is faster at the equator, and slows when you go north or south respectivly. So a rotating or moving object will be dragged ahead by the faster moving equator.
Could someone please explain to me why I keep hearing that the Coriolis effect requires snipers to adjust their aim, but not golfers, pitchers, or bowlers. This guy is the first ive heard say that it takes extended time to see the effect.
Two things are at play here: Speed and Distance. Sniper bullets go very fast AND very far, so the Coriolis effect is much more noticeable than it is for golf balls, baseballs, and bowling balls. I can guarantee you it affects /everything/, but it's so small for most things that it's not worth worrying about.
Thanks for responding. My brain hurts from all the differing opinions. I can see how time in the air could effect it but not speed. I've seen what I assume is an oversimplified formula of a bullet moving 2.5 inches per second of flight. You say speed effects this, but which way. Are faster moving objects influenced more, and why? Thanks.
I mean, if you're factoring in time in the air and distance traveled, the easiest way to incorporate that is with a speed (distance/time). I guess it would have made more sense if I said "Two things are at play here: Time and Distance." The equation for Coriolis incorporates those two things by just incorporating speed instead. It depends on the rotational speed of the Earth and the translational speed of the projectile.
It seems to me that part of the answer above doesn't make sense. If a sniper bullet is travelling very fast, it seems to me that it would be less affected by the Coreolis effect. Imagine a bullet travelling "infinitely fast" - there would be no time for the rotation to have an effect on the path of the bullet (as observed from someone on our rotating planet).
Andrew Hebert You're right that, if you make something go faster but travel the same distance, the faster thing will be deflected less. It's just that faster things tend to go farther if you let them, so sniper bullets end up having a bigger deflection overall than golf balls because they go farther. No matter what though, the bullet is going to have a bigger Coriolis /force/ on it than the golf ball (regardless of the deflection they end up experiencing). I should do a video on this...
If ONLY people knew how IMPACTFUL this bit of information is to their lives and how its being manipulated... this video would have nearly 8 billion views.
I liked your toilet demonstration - I always had had an uneasy feeling about the coriolis effect explanation. (I´m in Mazatlan and my toilet empties counterclockwise (viewed from above).)
I saw what you did with the 'two' toilets. I'm a Captain Disillusion follower, so a little stretching and flipping doesn't fool me! But you're still right :)
It was a gift from my brother who got it at a local store. There are a lot of different clocks like this out there though: www.google.com/search?q=clock+with+math&ie=utf-8&oe=utf-8
I have a regular northern toilet, but it flushes backwards in time with opposite charge, so the swirl is still oriented counter-clockwise, but all the particles in the water will flip spin in the process. :/
The coriolis effect makes moving objects curve to the right in the northern hemisphere (and curve to the left in the southern hemisphere). That means any object must move CLOCKWISE in the northern hemisphere and anticlockwise in the southern hemisphere. But then at 1:50 you say that cyclones rotate anticlockwise in the northern hemisphere which is the exact OPPOSITE of what the coriolis effect predicts.
Ordinary air streams move clockwise in the northern hemisphere and counter-clockwise in the southern hemisphere. The reason hurricanes and cyclones do the opposite, is a consequence of the air being drawn in toward the low pressure eye of the storm simultaneously with the ordinary Coriolis effect acting on the surrounding air. The hurricane or cyclone isn't recognized as a storm, until you get to the region that experienced enough of a pressure drop to reverse its rotation direction. The same thing happens if you have a drainage system that controls for all other factors. The water on the outside initially moves CW in the northern hemisphere and CCW in the southern hemisphere, and will switch its rotation direction on its way in toward the center. And the rotation will be more extreme in the center, which is why the northern hemisphere is known for a CCW drainage and the southern hemisphere is known for a CW drainage.
I'm not sure exactly what you're referring to. The atmosphere can move energy around by conducting heat, forming convection currents, etc. The rotation of the Earth definitely plays a role in that, but that puts it on equal footing to the Coriolis effect (not caused by it, but just another effect of the spinning Earth).
And I always thought the Coriolis effect were the lights I see after hitting my head on a brick wall while trying to understand the stupidity that drives decisions while at work.
We definitely have to worry about the rotation of the Earth because it makes things move in the sky. We can't do photography without a telescope that track objects in the sky. However, the Coriolis effect doesn't really come into play.
+Kelly Sunseri-Adams The hurricane that's *on the screen* when I say "counter-clockwise" is actually rotating counter-clockwise. It's the image just before that's rotating the other way.
Ok since we have up to date comments I’ll explain how the Coriolis effect works. Let’s use artillery that shoot from the equator to a 45° latitude target in the Atlantic since we don’t want to hit anyone. My artillery piece in on the equator traveling east at 1600 kmh due to the earth’s rotation. My target is traveling at 650 kmh east at its latitude since the earth rotates a 15° per hour at every latitude and the circumference at the equator is much larger than at 45°. As my projectile is fired it has a northern trajectory, duh, but also an eastern trajectory or vector of 1600kmh. Since my target is traveling east slower than my projectile I’m going to miss my target because my projectile is going to land to the right of my target. If I reverse this and shoot Southward my projectile will land to the right of my target. Now, if I’m a sniper shooting long distance Westward, if I fire at my target, the target will rotate up towards me and my shot will be low. The opposite happens if I shot Eastward and my shot will be high. The difference on a long shot is about 20-30 cm between the tropics.
Indeed! This scenario is how I like to visualize the deflection caused by Earth's rotation. One correction though, facing and aim directly south from the Equator, the projectile will deflect to the left.
So if I would look from an inertial frame, fixed to the stars, the Coriolis force would disappear and cyclones wouldn't look like they're spinning? How?
Yes, the Coriolis force would disappear in that inertial frame (fixed to the stars), but that doesn't mean the cyclone would stop spinning. It just means it's spinning that direction _for a different reason._
The Science Asylum But if I'm looking down on a rotating disc from an inertial frame, and someone on the disc throws a ball outwards, this ball will follow a straight line according to me. But the throwing person on the disc sees the ball being deflected in a curved path, and explains this due to an fictitious force. If he'd only transform to my frame, the fictitious force would disappear and the curved path becomes straight again. So why does the air flow remains deflected ('rotating') if you go to an inertial frame hanging outside the earth? Why doesn't the path "flatten out" like the ball's path? Where is the flaw in this argument? Great videos by the way, use them for my classes too. Love them!
I love hearing when teachers use my videos in their classes... though, this video is super old. I wasn't very good at making videos back then. I'd like to revisit the topic, but it's hard to find the time.
*Just in case someone else stumbles across this thread:* The reason the cyclones/hurricanes rotate in opposite directions in opposite hemispheres is because of the _linear_ speed of the Earth at each latitude. It's fastest at the equator and lowest at the poles. In the northern hemisphere, the ground and the air above it is moving slower further north. In the southern hemisphere, it's moving slower further south. The speed gradients are opposite. Either way though, there is a speed gradient, which causes rotation.
Star Man They do not rotate between north and south as the video demonstrates. However northern cyclonic events do rotate anti-clockwise and southern cyclonic events do rotate clockwise. It due to the different speed of the rotating earth at different latitudes.
We live near active volcanoes, so when we flush the water turns to steam, expands massively, and blows everything upwards to the ceiling. It's way cool to watch, but afterwards, not so much......
Well... yes, it is pretty solid evidence for a spherical Earth... however, good luck convincing a flat-earther with it. I'm sure at least one of them has come up with some _super ridiculously complex_ mechanism for it to still work.
Steven Mark The science of pendulums is well known and they kept time for us for 300 years. The pendulums momentum stays the same and the building housing the Foucault’s pendulum rotates around it.
I ate an entire cheese stuffed crust pepperoni pizza last night. My toilet won't flush now so I can't see which way it flushes. Do you have any suggestions, other than going outside and getting a tree branch to break up my brown torpedo?
Hi, Director General Planetary Supermind of the Science Asylum, could you answer my apparently unanswerable question about whirlpools?, I saw my draining bathwater whirling to the left, then it slowed down, kinda went all tumultuous and reappeared as the opposite right whirlpool, how does it do that exactly?, go from left to right?.
The reason you can't find a simple straight answer is because there isn't one. Fluid dynamics is incredibly complicated. Any slight change in the speed of water in one part of the bathtub can change the flow of all the water (including the direction of the whirl).
If things deflect to the right on the N. hemisphere due to the coriolis effect, why does hurricanes rotate counter clockwise? Deflection to the right makes a clockwise path does it not?
kreaturen For the deflection to happen, the air has to be moving in the first place. A low pressure zone sucks the air in and the Coriolis force deflects the air to the right as it goes in creating a counter-clockwise rotation. See the pic in this link: physicscentral.com/explore/action/hurricane.cfm
Except you won't get decent wind at the equator. The equator contains the inter-tropical convergence zone, where global circulation tends to generate updrafts instead of horizontal winds. If you are actually trying to sail with wind-powered sails, you usually look for prevailing wind zones that are just north or south of the equator if you try to sail west (i.e. the trade winds), or at mid-latitudes if you try to sail east. If you have a boat powered by something other than sails, like a diesel engine, then yes, the equator is the safest place for your vessel to travel.
For the last experiment we see that in the perspective of the person on the merry go round the ball seems to move in another direction.Instead of the force can't it just be that as we are rotating at high speeds so as we throw the ball as eyes move away from the ball in such a speed and direction that our brain pictures the ball going in the other direction
Our eyes moving away from the ball is absolutely what is happening according to someone _off_ the merry-go-round. Some _off_ the merry-go-round doesn't need a force to be there. However, if we're _on_ the merry-go-round, then our eyes are not moving at all. They're staying in one place like our body and the merry-go-round isn't spinning. According to someone _on_ the merry-go-round, it's the rest of the world that's spinning and the motion of the ball can't be explained without a force.
Our toilets in Australia don't rotate the water like US ones seem to so I can't comment on that but looking at the rotation of water down a plug hole here it always rotates clockwise as it should in the southern hemisphere so I think it is demonstrable on a small scale. Yes?
Kimberly KKV // The object is actually traveling tangentially away from the point where the object was released. The tangent is always perpendicular to the center of rotation. To illustrate an example, it's the same principle by which David slew Goliath with his slingshot.
I live in Canada and filled a bath tub and allowed it to drain while I was on a trip in Adelaide, Australia. It showed opposite to what I've seen in Canada. Was it just a coincidence or does it actually effect it?
You can see the effect on that small of a scale as long as the other factors are removed. Several years ago, there was a big collaboration done on this: ua-cam.com/video/mXaad0rsV38/v-deo.html
You are simply looking at the top or the bottom of the vortex. You have no choice. It is the same vortex. A low pressure vortex cannot change direction of rotation. It rotates in the same direction of spin as that of the planet, that is west to east. Just as the Earth appears to spin counter clockwise in the northern hemisphere and clockwise in the southern hemisphere. Clearly that is not possible as the Earth would be torn in two. Viewpoint has misled us to believe that low and high pressure systems rotate in different directions in the Northern and Southern Hemispheres of Earth and other planetary, stellar and galactic bodies. The discussion in my google book shows that low pressure systems on Earth rotate in the same direction as the solid body, the planet, while high pressure systems rotate opposite to the planet’s direction of rotation, no matter what hemisphere you are in. Turn a model of the world, a globe, on its side and spin it and view it from the north and south pole and then you will understand that vortices just like the planet, spin only in one direction. When vortices cross the equator, they do not change direction of rotation. They do not have to. We are then simply looking at the vortex on its side. We are not seeing that vortex in plan view.The rotation at the equator is up in the west of your position and down to the east, the same direction as the spin of the Earth. Chris Landau. March 16, 2019 play.google.com/store/books/details/Chris_Landau_Spin_How_Viewpoint_Affects_Rotation_D?id=bId0DwAAQBAJ
@@ScienceAsylum Also, I quite like some of your old videos. Though your videos have definitely significantly gotten better over time, I certainly don't think you should be embarrassed of the older ones, as they're still quite good.
Isn't that thing wid the merigo round relative?... I will nly feel it becoz my body thinks it is at rest and thus d ball looks like its following a strange path?
cole hampton That’s incorrect. There is a Coriolis effect based on the relative rotational speeds of our globe at different latitudes and directions, but it is not a force. There is a centrifugal effect but it is not a force.
The Science Asylum how does gravity keep the airplane going straight line? the theroy of gravity is supposed to pull objects down to earth not pull from side to side. please correct me if im wrong i am only wanting to understand.
The Science Asylum i dont believe in a theroy that has been a theroy for more than 200 years. if we cant prove a theroy to be true with in 200 years then its not real. gravity is not real to me. people will argue with me over this but its crazy to think that theroy is fact and has been proven if that was the case it wouldnt be a theroy...
Oh, I thought you meant a perfectly straight line out into space. My bad. I suppose they would have to adjust a little for the Coriolis effect, but I think they do that by not flying in a straight line to begin with. They travel in arcs and adjust constantly for all kinds of things, like air currents and changes in pressure. I imagine those bigger corrections would take care of Coriois.
As for your comment about Gravity, scientists use the word "theory" VERY differently than non-scientists. What non-scientists call a "theory," scientists call a "hypothesis": basically, a guess at why things happen the way they do that might be right or might be wrong. A "theory" to a scientist is a MUCH bigger deal. A SCIENTIFIC theory is a hypothesis (a guess) that's been proven (it's no longer just a guess).
The negative sign makes sure the direction matches what we see in the real world. The "2" doesn't really have much significance (as far as I know)... but I'll think about it some more.
The Science Asylum Yes it is. I got in to this long debate with this boy my age on Facebook. I’m 15 and he’s 16 Anyhow he is pretty religious. But we are still friends but I mentioned seeing the ISS live feed. He blurted out oh that’s CGI, it’s not real the earth is flat. I was completely floored. The only thing he kept saying after hours of debate and videos with evidence of a round earth was prove it and it’s CGI. So finally I said I’m a shooter at Long Range Shooters Of Utah. We have to compensate for the spin of the earth when we shoot at extreme ranges. He just keeps saying that bullet drop and I just have to aim higher. How do you reach someone being willfully ignorant?
my 6th grade science class loved your video!
Amy Arsiwala Yay! :-D
I wish i went to Elementary school or even middle school to have a a chance of seeing these awesome videos in school!
its a lie.
Earth spin is disproven by a gyro. Check it out if you want to teach your class the TRUTH. Don't teach them lies. Prove what you say.
the Trayne ua-cam.com/video/SVvf617ReVs/v-deo.html
Great advice: "Don't ever forget you're pretending" ...for when you're pretending.
I love how you can see some similarities between the Centrifugal force and the Coriolis force with the electric force and the magnetic force
Excellent visual of ball thrown on rotating surface. Easy to understand basic concept.
Very good video, accurate, concise, punchy and funny, as well as being steeped in physics and the big concepts.
Well done
+TheRumpus Thanks!
+The Science Asylum
Scientific videos in which I cannot see any mistakes are rare. You clearly know your subject intimately and understand it with clarity.
As the artillery gunner said "I didn't miss, the earth moved underneath me".
No idea which way does my toilet flush :)) In any case, you explained it in a way that we all can understand it. Didn't knew the part with the Ecuator area. Well done, Nick.
my toilet doesn't flush ... where do I have to move to? ...or may be just call the plumber?...
In Russia, toilet flush you
Michael Knightly xaxaxaxaxaxaca
Soviet Russia!
@Omni Smigliani we have only "kompost yama" on the backyard of babush'ka's dachya
It's too late to talk about toilets now, but 'just wanna say: this is my favorite asylum-- concise and v. digestible.
this is awesome, we were learning this in my dynamics class but we used artillery fire as an example
My toilet flushes just straigt down in Europe! No spinning.... just straigt flush.
Straight! Not straigt... sorry
+Matias Kurvinen mine too
I live in Australia and have never seen a spinning toilet
Maverickmace are you upside down rite now..or did gravity turn you around???
Matias Kurvinen Modern low flush toilets don’t spin.
Thank you! This really helped me with my meteorology homework :)
You're welcome!
I truly love your videos!! Each one makes me a little bit crazier!!
Wow! I just noticed this is Spinning Clone's birth. He is my favorite clone so i am honored to witness his first appearance.
Ha! I had forgotten he was in this.
May the force be with you
God the sound effect for 2:19 is adorable for some reason
You're so funny and your explanations are clear!
***** Thanks!
Looking at the hurricane map, there is a very noted difference between frequency between the North Atlantic and North Pacific Oceans. The Southern Oceans show even more of an oddity where it looks like South America uses some sort of hurricane repulsive device to keep them at bay (pun intended)
Simply put; the rotation is faster at the equator, and slows when you go north or south respectivly. So a rotating or moving object will be dragged ahead by the faster moving equator.
I have seen this video more then 50 times....i liked this one more
But it's the same video
Could someone please explain to me why I keep hearing that the Coriolis effect requires snipers to adjust their aim, but not golfers, pitchers, or bowlers. This guy is the first ive heard say that it takes extended time to see the effect.
Two things are at play here: Speed and Distance. Sniper bullets go very fast AND very far, so the Coriolis effect is much more noticeable than it is for golf balls, baseballs, and bowling balls. I can guarantee you it affects /everything/, but it's so small for most things that it's not worth worrying about.
Thanks for responding. My brain hurts from all the differing opinions. I can see how time in the air could effect it but not speed. I've seen what I assume is an oversimplified formula of a bullet moving 2.5 inches per second of flight. You say speed effects this, but which way. Are faster moving objects influenced more, and why? Thanks.
I mean, if you're factoring in time in the air and distance traveled, the easiest way to incorporate that is with a speed (distance/time). I guess it would have made more sense if I said "Two things are at play here: Time and Distance." The equation for Coriolis incorporates those two things by just incorporating speed instead. It depends on the rotational speed of the Earth and the translational speed of the projectile.
It seems to me that part of the answer above doesn't make sense. If a sniper bullet is travelling very fast, it seems to me that it would be less affected by the Coreolis effect. Imagine a bullet travelling "infinitely fast" - there would be no time for the rotation to have an effect on the path of the bullet (as observed from someone on our rotating planet).
Andrew Hebert You're right that, if you make something go faster but travel the same distance, the faster thing will be deflected less. It's just that faster things tend to go farther if you let them, so sniper bullets end up having a bigger deflection overall than golf balls because they go farther. No matter what though, the bullet is going to have a bigger Coriolis /force/ on it than the golf ball (regardless of the deflection they end up experiencing). I should do a video on this...
If ONLY people knew how IMPACTFUL this bit of information is to their lives and how its being manipulated... this video would have nearly 8 billion views.
I liked your toilet demonstration - I always had had an uneasy feeling about the coriolis effect explanation. (I´m in Mazatlan and my toilet empties counterclockwise (viewed from above).)
amazing explanation. you are doing a great job. great.
The grill is a fact it’s really a consequence of rotating frames your eye is rotating in one way in the ball is going perpendicularly out
Thx this helped with my test on Tuesday
I saw what you did with the 'two' toilets. I'm a Captain Disillusion follower, so a little stretching and flipping doesn't fool me! But you're still right :)
Your clock is amazing! Where can I get that?
It was a gift from my brother who got it at a local store. There are a lot of different clocks like this out there though: www.google.com/search?q=clock+with+math&ie=utf-8&oe=utf-8
did not notice the monkeys until you mentioned it.
As kids say on a test, “I didn’t get it wrong, the earth moved under me and my hand slipped.”
Chrima Tez hi
WeiLonq hi orlando
I have a regular northern toilet, but it flushes backwards in time with opposite charge, so the swirl is still oriented counter-clockwise, but all the particles in the water will flip spin in the process. :/
you should do more videos
The coriolis effect makes moving objects curve to the right in the northern hemisphere (and curve to the left in the southern hemisphere).
That means any object must move CLOCKWISE in the northern hemisphere and anticlockwise in the southern hemisphere.
But then at 1:50 you say that cyclones rotate anticlockwise in the northern hemisphere which is the exact OPPOSITE of what the coriolis effect predicts.
Ordinary air streams move clockwise in the northern hemisphere and counter-clockwise in the southern hemisphere. The reason hurricanes and cyclones do the opposite, is a consequence of the air being drawn in toward the low pressure eye of the storm simultaneously with the ordinary Coriolis effect acting on the surrounding air. The hurricane or cyclone isn't recognized as a storm, until you get to the region that experienced enough of a pressure drop to reverse its rotation direction.
The same thing happens if you have a drainage system that controls for all other factors. The water on the outside initially moves CW in the northern hemisphere and CCW in the southern hemisphere, and will switch its rotation direction on its way in toward the center. And the rotation will be more extreme in the center, which is why the northern hemisphere is known for a CCW drainage and the southern hemisphere is known for a CW drainage.
@@carultch Thanks for the explanation!
Is this what is responsible for the horizontal transfer of energy in the atmosphere? If not, can you tell me what is?
I'm not sure exactly what you're referring to. The atmosphere can move energy around by conducting heat, forming convection currents, etc. The rotation of the Earth definitely plays a role in that, but that puts it on equal footing to the Coriolis effect (not caused by it, but just another effect of the spinning Earth).
What's clockwise and anti-clockwise? Depends if looking from above or below. What's above or below?
Up and down are different because matter moves up while antimatter moves down. In our universe, it's a one-way. 😊😊😅
And I always thought the Coriolis effect were the lights I see after hitting my head on a brick wall while trying to understand the stupidity that drives decisions while at work.
Do you have to take into account the coriolis effect when doing astronomy?
We definitely have to worry about the rotation of the Earth because it makes things move in the sky. We can't do photography without a telescope that track objects in the sky. However, the Coriolis effect doesn't really come into play.
Just north of Detroit myself, and counter-clockwise. And I haven't been to the Detroit Science Center in years!
It was closed for a while due to funding problems, but they've since reopened it. I wonder if they have anything new...
My toilet flushes anyway I want
Drew Kirigaya lol
Then you must do it by hand
me to
My toilet only flushes down.... *Sigh...*
you say that hurricans in N hemisphere rotate counter clockwise, but the image is rotating clockwise.... confusing.
+Kelly Sunseri-Adams
The hurricane that's *on the screen* when I say "counter-clockwise" is actually rotating counter-clockwise. It's the image just before that's rotating the other way.
How about a video on the gyroscopic effect?
Ok since we have up to date comments I’ll explain how the Coriolis effect works. Let’s use artillery that shoot from the equator to a 45° latitude target in the Atlantic since we don’t want to hit anyone. My artillery piece in on the equator traveling east at 1600 kmh due to the earth’s rotation. My target is traveling at 650 kmh east at its latitude since the earth rotates a 15° per hour at every latitude and the circumference at the equator is much larger than at 45°. As my projectile is fired it has a northern trajectory, duh, but also an eastern trajectory or vector of 1600kmh. Since my target is traveling east slower than my projectile I’m going to miss my target because my projectile is going to land to the right of my target. If I reverse this and shoot Southward my projectile will land to the right of my target.
Now, if I’m a sniper shooting long distance Westward, if I fire at my target, the target will rotate up towards me and my shot will be low. The opposite happens if I shot Eastward and my shot will be high. The difference on a long shot is about 20-30 cm between the tropics.
It's so sad that science is some much tied to human butchery...
Indeed! This scenario is how I like to visualize the deflection caused by Earth's rotation.
One correction though, facing and aim directly south from the Equator, the projectile will deflect to the left.
My toile spin depends on what is in it and how big. Sometimes it doesn’t spin at all...
So if I would look from an inertial frame, fixed to the stars, the Coriolis force would disappear and cyclones wouldn't look like they're spinning? How?
Yes, the Coriolis force would disappear in that inertial frame (fixed to the stars), but that doesn't mean the cyclone would stop spinning. It just means it's spinning that direction _for a different reason._
The Science Asylum But if I'm looking down on a rotating disc from an inertial frame, and someone on the disc throws a ball outwards, this ball will follow a straight line according to me. But the throwing person on the disc sees the ball being deflected in a curved path, and explains this due to an fictitious force. If he'd only transform to my frame, the fictitious force would disappear and the curved path becomes straight again. So why does the air flow remains deflected ('rotating') if you go to an inertial frame hanging outside the earth? Why doesn't the path "flatten out" like the ball's path? Where is the flaw in this argument?
Great videos by the way, use them for my classes too. Love them!
Never mind, figured it out. It's a tricky subject and confuses me often ;)
I love hearing when teachers use my videos in their classes... though, this video is super old. I wasn't very good at making videos back then. I'd like to revisit the topic, but it's hard to find the time.
*Just in case someone else stumbles across this thread:* The reason the cyclones/hurricanes rotate in opposite directions in opposite hemispheres is because of the _linear_ speed of the Earth at each latitude. It's fastest at the equator and lowest at the poles. In the northern hemisphere, the ground and the air above it is moving slower further north. In the southern hemisphere, it's moving slower further south. The speed gradients are opposite. Either way though, there is a speed gradient, which causes rotation.
Don't understand why the hurricanes rotation between North and South.
Star Man They do not rotate between north and south as the video demonstrates. However northern cyclonic events do rotate anti-clockwise and southern cyclonic events do rotate clockwise. It due to the different speed of the rotating earth at different latitudes.
We live near active volcanoes, so when we flush the water turns to steam, expands massively, and blows everything upwards to the ceiling. It's way cool to watch, but afterwards, not so much......
Anyone else hearing cpt MacMillan observing “Winds are getting a bit choppy”?
cool u made my test go easy.thank u mr..x
You're welcome! Glad it helped :-)
My toilet flushes upward. Never mind, I have to call a plumber.
Please give a video on torque
Why Does The Earth Keep Spinning? ua-cam.com/video/H-tuLd9Mu9k/v-deo.html
(I think it's the best I've got so far.)
Very funny very good to learn physics very good at everything you're great man!
Excuse my ignorance - but could a Foucault Pendulum be used to prove/disprove the flat-earth theory? Thanks
Well... yes, it is pretty solid evidence for a spherical Earth... however, good luck convincing a flat-earther with it. I'm sure at least one of them has come up with some _super ridiculously complex_ mechanism for it to still work.
Steven Mark The science of pendulums is well known and they kept time for us for 300 years. The pendulums momentum stays the same and the building housing the Foucault’s pendulum rotates around it.
I ate an entire cheese stuffed crust pepperoni pizza last night. My toilet won't flush now so I can't see which way it flushes. Do you have any suggestions, other than going outside and getting a tree branch to break up my brown torpedo?
There's this handy new invention. I'm not sure if you've heard of it. It's called a "plunger."
@@ScienceAsylum Why would i want to get shit on my plunger? My turd is the size of a pringles can and as big around as a baby's arm. Smart ass
Great video...funny, scientific and very helful!! Thank you!
You're welcome! :-)
Hi, Director General Planetary Supermind of the Science Asylum, could you answer my apparently unanswerable question about whirlpools?, I saw my draining bathwater whirling to the left, then it slowed down, kinda went all tumultuous and reappeared as the opposite right whirlpool, how does it do that exactly?, go from left to right?.
The reason you can't find a simple straight answer is because there isn't one. Fluid dynamics is incredibly complicated. Any slight change in the speed of water in one part of the bathtub can change the flow of all the water (including the direction of the whirl).
@@ScienceAsylum Yeah, i know, because i found it, and as complicated as you'd like it to be, its as simple as a snake biting its tail.
my toilet flushes down! with a clockwise twist
If things deflect to the right on the N. hemisphere due to the coriolis effect, why does hurricanes rotate counter clockwise? Deflection to the right makes a clockwise path does it not?
kreaturen For the deflection to happen, the air has to be moving in the first place. A low pressure zone sucks the air in and the Coriolis force deflects the air to the right as it goes in creating a counter-clockwise rotation. See the pic in this link: physicscentral.com/explore/action/hurricane.cfm
Ah, I see. Had to look at the pic to see it though. Guess I'm a visual learner... Thanks.
kreaturen You're welcome.
It sounds like the equator is functionally an asymptote.
Accurate analogy.
a square b, it's like the merry go round.
is the equator the safest place to sail?
Except you won't get decent wind at the equator. The equator contains the inter-tropical convergence zone, where global circulation tends to generate updrafts instead of horizontal winds. If you are actually trying to sail with wind-powered sails, you usually look for prevailing wind zones that are just north or south of the equator if you try to sail west (i.e. the trade winds), or at mid-latitudes if you try to sail east.
If you have a boat powered by something other than sails, like a diesel engine, then yes, the equator is the safest place for your vessel to travel.
Can u please explain why they couldnt approach equator?
For hurricanes to cross the equator, they'd have to switch spin directions. There's _way_ too much mass spinning for that to be possible.
Now I'm so scared by this Coriolis thing I don't flush toilet anymore...
For the last experiment we see that in the perspective of the person on the merry go round the ball seems to move in another direction.Instead of the force can't it just be that as we are rotating at high speeds so as we throw the ball as eyes move away from the ball in such a speed and direction that our brain pictures the ball going in the other direction
Our eyes moving away from the ball is absolutely what is happening according to someone _off_ the merry-go-round. Some _off_ the merry-go-round doesn't need a force to be there. However, if we're _on_ the merry-go-round, then our eyes are not moving at all. They're staying in one place like our body and the merry-go-round isn't spinning. According to someone _on_ the merry-go-round, it's the rest of the world that's spinning and the motion of the ball can't be explained without a force.
Our toilets in Australia don't rotate the water like US ones seem to so I can't comment on that but looking at the rotation of water down a plug hole here it always rotates clockwise as it should in the southern hemisphere so I think it is demonstrable on a small scale. Yes?
It is demonstrable on a small scale, but you have to be _very_ careful with your experimental setup.
Hahaha.. I love getting 'a little crazy '
Kinky
Northern Hemisphere, England. My toilet flushes down
Why??? If you're spinning counterclockwise why doesn't the force of the spin cause the object to curve in the same direction??
Kimberly KKV // The object is actually traveling tangentially away from the point where the object was released. The tangent is always perpendicular to the center of rotation. To illustrate an example, it's the same principle by which David slew Goliath with his slingshot.
Kimberly KKV Who is spinning counterclockwise. Maybe you guys in the Northern Hemisphere butt in Aussie land it’s Clockwise.
Kimberly KKV Coriolis is an observational fact. Not a force.
I live in Canada and filled a bath tub and allowed it to drain while I was on a trip in Adelaide, Australia. It showed opposite to what I've seen in Canada. Was it just a coincidence or does it actually effect it?
You can see the effect on that small of a scale as long as the other factors are removed. Several years ago, there was a big collaboration done on this: ua-cam.com/video/mXaad0rsV38/v-deo.html
The water on my toilet levitates upward, then soaks onto the ceiling.
Impressive.
Yeah
it causes things to spin just like gravity causes things to float
You are simply looking at the top or the bottom of the vortex. You have no choice. It is the same vortex. A low pressure vortex cannot change direction of rotation. It rotates in the same direction of spin as that of the planet, that is west to east. Just as the Earth appears to spin counter clockwise in the northern hemisphere and clockwise in the southern hemisphere. Clearly that is not possible as the Earth would be torn in two. Viewpoint has misled us to believe that low and high pressure systems rotate in different directions in the Northern and Southern Hemispheres of Earth and other planetary, stellar and galactic bodies. The discussion in my google book shows that low pressure systems on Earth rotate in the same direction as the solid body, the planet, while high pressure systems rotate opposite to the planet’s direction of rotation, no matter what hemisphere you are in. Turn a model of the world, a globe, on its side and spin it and view it from the north and south pole and then you will understand that vortices just like the planet, spin only in one direction. When vortices cross the equator, they do not change direction of rotation. They do not have to. We are then simply looking at the vortex on its side. We are not seeing that vortex in plan view.The rotation at the equator is up in the west of your position and down to the east, the same direction as the spin of the Earth. Chris Landau. March 16, 2019 play.google.com/store/books/details/Chris_Landau_Spin_How_Viewpoint_Affects_Rotation_D?id=bId0DwAAQBAJ
"Myth busted!"
I get the feeling that you'd been wanting to debunk that particular myth for quite a while. Am I right?
Wow... you're going _way_ back in my catalog, aren't you? Back to the embarrassing "cringe" days.
@@ScienceAsylum Blame UA-cam -- they keep recommending your old videos.
@@ScienceAsylum Also, I quite like some of your old videos. Though your videos have definitely significantly gotten better over time, I certainly don't think you should be embarrassed of the older ones, as they're still quite good.
My toilet flushes north... is that normal?
Northern
Isn't that thing wid the merigo round relative?... I will nly feel it becoz my body thinks it is at rest and thus d ball looks like its following a strange path?
I just replace my toilet with a new one everytime I use it
Well... at least you're hygienic?
@@ScienceAsylum did the science asylum just respond to a comment on a 5 year old video xD this is why you're the best
I liked this video, BUT I HATE MY ASSIGNMENT
My toilet goes more like a waterfall straight down.
Interesting
my loo leaks so bad it has cancelled out this force so stock that in the equation
Ok, so there is no Coriolis effect or such a construct as centrifugal force. I'm glad we can be clear.
Correct. They're just useful math tricks.
cole hampton That’s incorrect. There is a Coriolis effect based on the relative rotational speeds of our globe at different latitudes and directions, but it is not a force. There is a centrifugal effect but it is not a force.
i seriously wanna know wtf is wrong with toilet flushes litterarly *everywhere* i go on videos related to earth
if a plane takes off in Texas and is headed to Chicago does that airplane need to correct the straight line of path so its not off corse?
Not really. Gravity takes care of that. Airplanes don't have the thrust (or the fuel) necessary to maintain a straight line path.
The Science Asylum how does gravity keep the airplane going straight line? the theroy of gravity is supposed to pull objects down to earth not pull from side to side.
please correct me if im wrong i am only wanting to understand.
The Science Asylum i dont believe in a theroy that has been a theroy for more than 200 years. if we cant prove a theroy to be true with in 200 years then its not real. gravity is not real to me. people will argue with me over this but its crazy to think that theroy is fact and has been proven if that was the case it wouldnt be a theroy...
Oh, I thought you meant a perfectly straight line out into space. My bad. I suppose they would have to adjust a little for the Coriolis effect, but I think they do that by not flying in a straight line to begin with. They travel in arcs and adjust constantly for all kinds of things, like air currents and changes in pressure. I imagine those bigger corrections would take care of Coriois.
As for your comment about Gravity, scientists use the word "theory" VERY differently than non-scientists. What non-scientists call a "theory," scientists call a "hypothesis": basically, a guess at why things happen the way they do that might be right or might be wrong. A "theory" to a scientist is a MUCH bigger deal. A SCIENTIFIC theory is a hypothesis (a guess) that's been proven (it's no longer just a guess).
yeah
i do
Is good to be in an Asylum and find no Stray Demon!
i thought it was northern clockwise, southern counterclockwise
Nope! I guess you learn something new every day?
***** I was thinking about ocean currents, oops
This aged like fine wine
That's weird I don't have a pendulum in my car.
Can you explain for me the -2 that is in the Coriolis force equation
The negative sign makes sure the direction matches what we see in the real world. The "2" doesn't really have much significance (as far as I know)... but I'll think about it some more.
You ask which way does my toilet flush? Down. It would be quite messy to go the other way.
I downloaded ur video
My toilet flushes excellently😂😂
Mine too!
Love this…
If you flush a toilet on the equator, the Earth will explode.
Flush into dinning table
right and we live in the northern hemisphere
My toilet flushes up
To the top
When I fire a bullet at a target a mile away I have to compensate for the spin of the globe- the coriolis effect. 🤷♀️
It's crazy, isn't it?!
The Science Asylum Yes it is.
I got in to this long debate with this boy my age on Facebook. I’m 15 and he’s 16
Anyhow he is pretty religious. But we are still friends but I mentioned seeing the ISS live feed.
He blurted out oh that’s CGI, it’s not real the earth is flat. I was completely floored.
The only thing he kept saying after hours of debate and videos with evidence of a round earth was prove it and it’s CGI. So finally I said I’m a shooter at Long Range Shooters Of Utah. We have to compensate for the spin of the earth when we shoot at extreme ranges.
He just keeps saying that bullet drop and I just have to aim higher.
How do you reach someone being willfully ignorant?
Unfortunately, I don't think you can. You can't help someone that doesn't _want_ to be helped.
my toilet flushes downwards