How does the Moon control Earth's tides? | Stargazing | ABC Science
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- เผยแพร่เมื่อ 21 ก.ย. 2024
- We know the Moon controls Earth’s tides - but how? Subscribe to ABC Science TH-cam 👉 ab.co/2YFO4Go
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Someone on another TH-cam video about the tides asked why the sand isn't pulled by the Moon's gravity?
Yes I agree
Check out Eric Dubay and DIRTH.
Exactly I knw ryt
Ci
I watched 5-6 TH-cam videos about tides before this one. He explains it in a easy to understand visual way. I learned the most from him.
Thanks for saying so Samantha!
Its not actually pulling on tides. Its more squeezing it to shift that causes an effect that causes tides
Lol I thought I was the only one.. this video makes more sense then any other. I’m a visual person
It may be easy to understand, but I’m not sure that’s a virtue when it’s also not a correct explanation.
@@ABCScience WHERE EINSTEIN WENT WRONG REGARDING WHAT IS BALANCED BODILY/VISUAL EXPERIENCE:
Get a good look at the blue sky. Get a good look at what is THE EYE. Consider the man who is standing on what is THE EARTH/ground. Touch AND feeling BLEND, AS ELECTROMAGNETISM/energy is gravity. Balanced BODILY/VISUAL EXPERIENCE is the reason that objects AND MEN fall at the SAME RATE (neglecting air resistance, of course), AS E=MC2 IS F=ma; AS ELECTROMAGNETISM/energy is gravity. Gravity/acceleration involves BALANCED inertia/INERTIAL RESISTANCE, AS E=MC2 IS F=ma; AS ELECTROMAGNETISM/energy is gravity. (Accordingly, the rotation of WHAT IS THE MOON matches it's revolution.) "Mass"/ENERGY involves BALANCED inertia/INERTIAL RESISTANCE consistent with/as what is BALANCED electromagnetic/gravitational force/ENERGY, AS E=MC2 IS F=ma; AS ELECTROMAGNETISM/energy is gravity. Gravity IS ELECTROMAGNETISM/energy. E=MC2 IS F=ma. This NECESSARILY represents, INVOLVES, AND DESCRIBES what is possible/potential AND actual IN BALANCE, AS ELECTROMAGNETISM/energy is gravity !!!!!!! It all CLEARLY makes perfect sense, AS BALANCE AND completeness go hand in hand !!! Think QUANTUM GRAVITY !!!!!!!!!!!
By Frank DiMeglio
I can't believe it took me so long to find you - I'm in awe every day. I could follow you, carry your equipment? Kidding, don't worry.
That was such a clear explanation. The visual aids really help.
This ISN’T how the tides are formed at all. It is a common misconception that is all too often put about and it is definitely wrong. The true explanation isn’t hard to follow but it is counter-intuitive. The Moon’s gravity doesn’t pull the tides up into bulges, it is far too weak to do so, and if it did, it would pull equally on everything else too. Also the explanation for the second tidal bulge on the far side of the Earth given here is incorrect.
The Moon’s vertical pull upwards at the surface of the Earth is about ten million times smaller than the Earth’s downward pull, so this part of the Moon’s gravity simply cannot directly lift anything at all. What actually happens is more subtle but makes perfect sense when you get the picture. The Moon’s gravity is only precisely straight up when the Moon is directly overhead. Everywhere else the gravity vector is leaning over a bit in order to point at the Moon. This means that everywhere on Earth away from the Earth-Moon line experiences a small horizontal force in the plane of the surface, pointing towards the Earth-Moon line. Forces like this are called tractive forces and they are a bit smaller than even the small vertical forces, but the key thing is that they accumulate across the huge surface area of the oceans and being horizontal they don’t get overwhelmed by Earth’s gravity which is always at ninety degrees to them. The tractive forces all point towards the place where the Moon is directly overhead, and seawater is fluid and incompressible, so a bulge of ocean a few metres high forms directly under the Moon, and also on the far side of the Earth where the Earth-Moon line comes out. The cause of this second bulge is slightly harder to visualise until you see that everything is symmetrical about the Earth-Moon line. The Moon’s gravity is a bit weaker on the far side of the Earth and, indeed, the second bulge is a little smaller and gives a slightly lower high tide.
All this was worked out by Euler in the eighteenth century, and mathematically modelled by Laplace the Tidal Equations that bear his name. Science has had a good understanding of the Tides for nearly 250 years, but sadly the truth of the matter doesn’t seem to have reached many TH-cam producers.
what's the best video to watch this description?
@@bryceg73 PBS Space Time is -the only- a channel the I've seen with such a video
Edit: And Higgsino Physics
in the open oceans the lift is rarely more than a foot in height.Near coastlines it appears much bigger because of the shallow seabeds.
what an absolute gem of a video!
Now I know what santa does during his vacation 😇
I Love your explanation. It’s awesome and I totally get it. Thank you sir! 👍🏽
He just explains what your indoctrinated in schools with, no other lakes or large bodies of rivers have a tide using his explanation
Outstanding! Clearly explained and the example was so practical I can use it in my Science classroom! How wonderful to have an expert that is Australian explaining so clearly! Bravo! Please make more.
Glad it was helpful!
Why is it called "spring" tide? Is it spring as in the season of spring? Or spring like the verb?
Good question, but why do Fireflies blink? Anyway, in response to your question, it can’t be because of the season, as we still get “spring” tides in the “summer” and “autumn.” So, it must be to do with the verb, as in “jump” upwards! When the solar tides and lunar tides constructively interfere at times of “new” and “full” moon. Does that answer your question? Thanks.
@@wavydaveyparker Yes, thank you! ☺
I suppose fireflies blink because it's more energy efficient than leaving the lights on :p
@@BlinkinFirefly That is actually a very ecological reply, because male fireflies have to be careful who they’re blinking at, in case they arrive and it’s just another firefly who’s left the lights on by mistake! 😄 Thanks, but it does still beg the question though, as to how the sun and moon both form those two “bulges” in the ocean? 😊 and how does water “spring” upwards? 🤔
@@wavydaveyparker Lol! But really, bioluminescence is a remarkable (and beautiful) thing. I suppose the "spring" is in reference to how, at certain positioning of the sun and moon, the water seems to be EXTRA bulge-y. But I also just learned that the tugging of the moon on the Earth adds to the bulge on the opposite side because the water kind of lags behind the Earth as the Earth gets tugged toward the moon. Since the ocean is less tied down, it gets...sloshy? Endlessly fascinating to consider all the nuances!
@@BlinkinFirefly Thanks, and I totally agree, but “bioluminescence” is far too long a word for my limited vocabulary. Would you kindly firefly over to my blinking cartoon, as I’d really enjoy discussing this tidal nuance with you further. The earth isn’t tugged towards the moon, and water isn’t pulled upwards. As the man with the long white beard said, “the earth and moon wobble around each other, and the water on the far side is sort of thrown outwards.” It is endlessly fascinating, but it’s important to get the science correct, as a certain Mr Newton spent a lot of time thinking about it, after the apple landed on his head. 🤔 You certainly have a nice way with words, and it would be a pleasure to continue our conversation. Take care.
If the moon can move the tides in the ocean, it can move us. We are comprised of 75% water in our body.
The moon doesn't pull the sea water into a bulge, its more complicated than that. The oceans are squeezed by small amounts all over by the moons gravity. Because the oceans are very large this squeezing effect results in the tidal bulges on both sides of the earth. Large lakes and even the Mediterranean sea have virtually no tides as there is not enough water (area and depth) to squeeze into a bulge. The moons gravity has no effect on the water in your body or your bath tub or coffee in your cup.
Yes that's where astrology comes and since moon controls ur water percentage other planets control different aspects and hormones ect that each controls something (emotions , happiness , love ect)
We are a lot smaller than the ocean. We also have skin, which does a pretty good job at keeping all our water in the same place. The ocean doesn't have skin.
The oceans have a mass of 1.35 x 1018 metric tons, each human has a mass of a few hundred kg at most. Big difference there. The moon does pull on us, just not as much due to our much lower mass. There are ground tides that can be observed all across earth where the moon pulls on the solid earth. They are just much less noticeable due to the ground being solid.
@@nathancook2852 this. I don't believe the moon is pulling on the water at all, I believe it is pulling on and stretching the earth's crust, it's just that water is more flexible and acts in an exaggerated way compared to the crust
Homeschool Mom here. Thank you for this reality lesson!
Too bad it's not the correct explanation
Awesome explanation!!
Clearest explanation so far 👍🏽
Glad it was helpful!
not sure if you explained the tidal bulge on the opposite side of the moon. I don't think Newton used the word " wobbling" : )
You're right Mike, Newton didn't use the word "Wobbling" 😂 What he meant was an orbital motion around a common centre of mass, which gives rise to a tidal force across the diameter, or circumference of the Earth, if you want to be pedantic with language. The Earth is in a freefall orbital motion, so the net acceleration at its centre is zero, and when you do the calculations correctly, you'll find my friends cartoon called, "What school gets wrong about tides - inertia - and space-time" and you can work through the problem together. Good luck.
@@oortcloud8078 I'll try to find the cartoon you mention
@@mikev4621Once again, you're right Mike, and apologise for sounding aloof. It does make sense to me, but I'm only quoting Newton, and it certainly made sense to him, so that's cool. My task is to help it make sense to you, so we're all cool. Hopefully, we'll be successful and I'm going to enjoy discussing tides further with you. Take care
@@oortcloud8078 Are you the actual person who posted this clip?
Fantastic video!!! It makes it even better for my kids when they see Space Gandalf!!!
I understand what you're saying but it doesn't make it any less weird. Wow, what a planet!
The critical point here is that the Earth and Moon "wobble" as he puts it, around a point called the "barycentre" that is inside the Earth but not at the centre, it is about 4,700 km from the centre and moves around with the rotation of the Earth..
he was talking about the water wobbling on the opposite side causing a bulge there, wasn't he?
you are not quite correct, the far side is not centrifugal force, its that gravitational attraction is distance dependent and the close water gets attracted more than average so it rises towards the moon and the far side gets less attracted and rises away from the moon
I like the exclamation
Hello Brittany, please forgive me. I don’t mean to sound pedantic or disrespectful, but I think you meant “explanation,” not “exclamation.” Of course you could like the explanation, and have an exclamation, that would be perfectly fine, but an exclamation is a jump of joy! And this is not a complete explanation for tides. Thanks
You know, I’ve wondered what if the moon had some water on it or a liquid. Like how extreme would the tides there be as the earth has a bigger gravitational pull than the moon has on us. It would be way more dangerous if there was liquid on the moon.
Nope. In common with many TH-cam videos, this presents the "opposite side" bulge as a product of centrifugal force (the 'wobble' mentioned in the video) when in fact, like the "Moon side" bulge, it's _also_ just the result of the Moon's gravity.
(anyone interested can google "tide myths" for more info - as mentioned, the one in this video is pretty widespread and sometimes called the "two causes myth" - and/or PBS Space Time has a video that better explains the actual physics)
something felt off when he mentioned that part; thanks for the info
I picked this video to help my 5 year old boy understand a little more about the effect of the moon on the sea. It's interesting and concise
Thanks Adam! We hope it helped.
Hello Adam. Too bad that this explanation is the wrong one. Unfortunately the ocean tides are a bit harder to explain than is attempted here. According to a certain mr. Einstein ‘Everything Should Be Made as Simple as Possible, But Not Simpler’. Like many others, this channel has made it simpler, ending up with a wrong explanation.
Please don’t pollute the mind of your five year old with incorrect information, as mistaken notions are hard to shake.
@@TribusMontibus Please enlighten us with the "correct" explanation. What good is saying something is incorrect, if you don't correct it. OR, did you not provide a better explanation because there isn't one?
@@nathancook2852 The correct explanation can be found in the videos on my channel. They align with the scientific consensus among oceanographers since Newton, Lagrange and Laplace, yet the general population seems unable to grasp it.
Your sarcasm is noted. It just makes you look the arrogant simpleton.
Excellent visual explanation, and ends with the most Australian pronunciation of the word ‘marvel’ I’ve ever heard.
How the tides work by Santa.
Bobo spotted
thank you space gandalf
Space if filled with light and vastt space but never dark , so the sun seeks darkness to shine
Brilliant thanks for that
Don't forget, nor discount, the effects of the Earth's kinetic rotation, winds, and barometric pressures on tides.
W man, W explanation, W earth
Thanks for the info
my school told me to do one of three bonus activites and i chose the only video one but i actually learned something :)
w
تفسير رائع ومبسط
needs more
science
awesome video
Anchor what is spring tide
The spring tide(s) occurs when the sun, earth and moon are roughly aligned. So, that’s during a ‘new’ and ‘full’ moon? The far-side bulge is due to inertia.
No Closed Captions (CC)? 😢
Well there is some now in case you're still wondering. I hope you have a good day either way!
lovely video
You explain it wilk
Pls show this to whatever tenured philosophy professor haphazardly attempts to discuss causation of tides via propositional statement “the wind causes tides” - the wind is part of the causal relationship but does not itself cause tides. You’d think some phil profs have never heard of Descartes’ bent stick in water-just because it looks bent doesn’t mean it is. Similarly, just because it “feels” as though winds “cause tides” it does not. Most philosophy departments are casualties of cronyism anyway, clearly.
This is by far the bestest Explanation i have seen regarding tides❤
Thank you for teaching me this. (Looking at your white beard I feel like I'm not to old to learn new things;)
Didn't get it!!!! How will the earth rotates while the oceans move in a different direction!!!!?
wonderful, impossible not feel great after watching this video
Your not showing the opening in earth when the gravity opens and closes them and water recede into the crevices and comes out when the earth relaxes.
So far away but it has the time to cause me all these problems.
Why there is no tide in large lakes as the Caspien sea?
If there is so many people explaining this phenomenon because no one knows the exact mechanism to put it in formula.
There are tides in (some) large lakes. This is not strictly a matter of how large the lake is and how much water it contains. The lake's shape, size and orientation plays an important role. Lake Michigan has approximately 5 cm tides, while Lake Victoria has none. Few laymen can explain this because most do not understand the mechanics of how tidal forces apply to the water on Earth. But to scientists this is no mystery.
So lets say if the sun or moon wasnt visible for some time, could this explain the biblical floods? Im trying to figure out how the world is 2/3 water yet the book says the entire planet flooded? Could it be that the "entire planet" in the bible was merely a few countries or one continent? Could some major artic area experience a drastic and sudden climate change?
Such a great video. Thank you!
You are so welcome!
@@ABCScience EINSTEIN IS UNCOVERED AND OUTSMARTED BY FRANK MARTIN DIMEGLIO:
WHAT IS E=MC2 is dimensionally consistent, AS TIME is NECESSARILY possible/potential AND actual ON/IN BALANCE; AS ELECTROMAGNETISM/energy is CLEARLY AND NECESSARILY proven to be gravity (ON/IN BALANCE); AS the rotation of WHAT IS THE MOON matches the revolution. Indeed, consider what is the man (AND THE EYE ON BALANCE) who IS standing on what is THE EARTH/ground; AS touch AND feeling BLEND; AS ELECTROMAGNETISM/energy is CLEARLY AND NECESSARILY proven to be gravity (ON/IN BALANCE). Indeed, WHAT IS GRAVITY is, ON BALANCE, an INTERACTION that cannot be shielded or blocked. GREAT. BALANCE AND completeness go hand in hand, AS it all CLEARLY makes perfect sense ON BALANCE. Magnificent.
By Frank Martin DiMeglio
The sun's tide-generating force is about half that of the moon. One half times one third is one sixth. Consider what is water. The density of what is the Sun is believed to be about one quarter of that of what is THE EARTH. The diameter of WHAT IS THE MOON is about one quarter of that of what is THE EARTH. The density of the human body is about the same as water. Lava is about three times as dense as water. Pure water is about half as dense as packed sand/wet packed sand. We can multiply one fourth times two thirds in order to ALSO get the surface gravity on the Moon in comparison with what is THE EARTH/ground. The gravity of the Sun upon the Moon is about TWICE that of what is THE EARTH. The lunar crust is about TWICE as thick on the far side of what is the Moon. Notice what is the TRANSLUCENT AND BLUE sky ON BALANCE. The maria (lunar “seas”) do occupy ONE THIRD of the visible near side of what is the Moon. One half times one third is one sixth. What is E=MC2 is taken directly from F=ma, AS TIME is NECESSARILY possible/potential AND actual ON/IN BALANCE; AS ELECTROMAGNETISM/energy is CLEARLY AND NECESSARILY proven to be gravity (ON/IN BALANCE); AS the rotation of WHAT IS THE MOON matches the revolution. Consider what is the orange AND setting Sun ON BALANCE. Consider what is THE EYE ON BALANCE. Consider what is the fully illuminated AND setting/WHITE MOON ON BALANCE !!! What is E=MC2 is dimensionally consistent. The land surface area of what is THE EARTH is 29 percent. This is EXACTLY between (ON BALANCE) what is one third AND what is one fourth. The maria occupy one sixth of what is the Moon. The BULK DENSITY of what is the Moon is comparable to that of (volcanic) basaltic lavas on what is THE EARTH/ground. Consider what are the tides. ONE HALF times one third is one sixth. ONE QUARTER times two thirds is one sixth. What is gravity is, ON BALANCE, an INTERACTION that cannot be shielded or blocked. CLEAR water comes from what is THE EYE (ON BALANCE). ON BALANCE, what is THE EARTH is ALSO BLUE !!! GREAT. BALANCE AND completeness go hand in hand. What is LAVA IS ORANGE, AND it is even blood red. Awesome. Yellow is the hottest color of lava. Blue is the hottest flame color. Note: Consider what is the blue flame. The lunar surface is chiefly composed of pumice. Volcanic ash is present as well. The topologic range (lowest to highest spots) on what is the Moon IS about THE SAME as that of THE EARTH (i.e., about 15 kilometers). This is the approximate distance from the very bottom of the Marianas trench to the top of the Himalayan mountains. Magnificent. The bottom line: What is gravity goes way beyond what Einstein tried to lay claim to (and to descriptively isolate). That is abundantly CLEAR. He never nearly understood what is TIME.
By Frank Martin DiMeglio
In understanding SPACE, what is gravity, TIME, AND time dilation (ON BALANCE), it is important is it to understand what is a BALANCED displacement of what is SPACE. ELECTROMAGNETISM/energy is gravity ON/IN BALANCE.
Consider what is E=MC2. TIME is NECESSARILY possible/potential AND actual ON/IN BALANCE. Consider TIME AND time dilation ON BALANCE. (c squared CLEARLY represents a dimension of SPACE ON BALANCE.) Indeed, the stars are POINTS in the night sky ON BALANCE. The rotation of WHAT IS THE MOON matches the revolution. Consider what is THE EYE, AND notice what is the TRANSLUCENT AND BLUE sky ON BALANCE. NOW, consider what is the BALANCED MIDDLE DISTANCE in/of SPACE. CLEARLY, BALANCED inertia/INERTIAL RESISTANCE is fundamental (ON BALANCE). “Mass"/ENERGY IS GRAVITY. ON BALANCE, consider what is the orange (AND setting) Sun. “Mass"/ENERGY involves BALANCED inertia/INERTIAL RESISTANCE consistent WITH/as what is BALANCED electromagnetic/gravitational force/ENERGY, AS ELECTROMAGNETISM/energy is CLEARLY AND NECESSARILY proven to be gravity (ON/IN BALANCE); AS gravity/acceleration involves BALANCED inertia/INERTIAL RESISTANCE (ON BALANCE) consistent WITH E=MC2, F=ma, TIME, AND time dilation ON BALANCE. This CLEARLY AND NECESSARILY represents, DESCRIBES, AND INVOLVES what is possible/potential AND actual ON/IN BALANCE, AS ELECTROMAGNETISM/energy is CLEARLY (AND NECESSARILY) proven to be gravity (ON/IN BALANCE). Notice what is the fully illuminated (AND setting/WHITE) MOON ON BALANCE. Great. TIME is NECESSARILY possible/potential AND actual ON/IN BALANCE. Indeed, inertia/INERTIAL RESISTANCE is proportional to (or BALANCED with/AS) GRAVITATIONAL force/ENERGY; AS ELECTROMAGNETISM/energy is CLEARLY AND NECESSARILY proven to be gravity (ON/IN BALANCE). This CLEARLY explains what is E=MC2 AND F=ma ON BALANCE, AS TIME is NECESSARILY possible/potential AND actual ON/IN BALANCE !! (Consider TIME AND time dilation ON BALANCE.) Great. Indeed, consider WHAT IS THE EARTH/ground ON BALANCE. I have mathematically proven why the rotation of WHAT IS THE MOON matches the revolution, AS ELECTROMAGNETISM/energy is CLEARLY (AND NECESSARILY) proven to be gravity (ON/IN BALANCE). Consider TIME AND time dilation ON BALANCE, AS the stars AND PLANETS are POINTS in the night sky ON BALANCE; AS c squared CLEARLY represents a dimension of SPACE ON BALANCE. (Consider what is THE EYE ON BALANCE.) I have mathematically proven what is the fourth dimension, AS ELECTROMAGNETISM/energy is CLEARLY AND NECESSARILY proven to be gravity (ON/IN BALANCE) !!! I have explained why what are OBJECTS may fall at the SAME RATE.
By Frank Martin DiMeglio
Easy explanation!
Some people have a skill for teaching, while some do not. This man here has it. Thanks, Diver/Astronomer person. Now I can move on with my life.
Edit: Oh I just saw that his name is Greg Quicke. Thanks, Greg!
Yes, it’s just too bad that ‘what has been explained to you so well’ is incorrect. Now you move on with your life with incorrect notions about the ocean tides.
Thank you for the clear explanation.
This very usefully this video
thanks
I marvel too.. lol... Good explanation of something that always had me a little confused... From America to down under
Check out Eric Dubay and DIRTH.
Both are very funny to watch try to make coherent arguments. My 3rd grader can poke a million holes in all their flat earth arguments.
Helpful
I guess. Too bad that it’s an incorrect explanation. It’s mainly a simplified depiction of the most common misconception on ocean tides.
@@TribusMontibus You explain it then
@@Jonas-ej7id You can watch my vidios for a more plausible explanation.
@@Jonas-ej7id Just look at Tribus’ vidios. He DOES explain it
@@gertdenroeste2516 nice
Here not for understanding the tide, but his accent and pronunciations.
Eh, no, not really.
Sewrch for "PBS Space Time" and "tides" for a much more physically accurate explanation.
That was great lol thank you!
Glad you enjoyed it!
How about a relativistic explanation?
Father Christmas not Santa
Gravity holds us down but not water?
@@Azzlad Well, you claim so. You may even be right. But it’s extremely unlikely that this is caused by the moon’s gravitational attraction. The difference in that attraction, throughout the month, is less than the effect of a pea, suspended 30 cm above your head. If you are truly that sensitive to gravitational effects, you should be really careful what you put on your nightstand before you go to sleep, as a glass of water’s attraction will affect you 100 times more than the moon’s.
Ever seen liquid move in a cup, or in a pool? Gravity certainly holds the water on Earth, but water is not rigid like a solid. What was the point of your questions that makes an incorrect implication?
dumbledore before and (after) drugs
Richard Gere
Sadly incorrect about the cause of the bulge on the side furthest from the moon☹️
So do high tides occurs when it is day light vs when it is dark?
High tides occur on the side of the Earth facing the moon, and the side opposite of that. They can, and do, occur during both day and night.
@@nathancook2852 Yes, and they occur in many places which do not face the moon at all. Just plot the high tides for New York City, Boston, Charleston, Miami and Havana. You will see that they bear no relation whatsoever to whether the moon is above their meridian.
You are trying to put your understanding into this model, and of course it won't work, because your understanding is flawed. You use big words to try to sound like you know what you are talking about. The video, and I, also mentioned that high tides occur on the opposite side of the Earth that is facing the moon. We can plot tides for up to two years in advance, because this is the system by which they work. You have offered nothing to the contrary. We have a working model. If it is wrong, then show it.
@@nathancook2852 I'm done talking to you. Some people just won't listen, no matter what. You are a waste of time.
@@TribusMontibus Yes you are, thank you for admitting as much by not providing evidence for what you claim.
....and to think there are still atheists out there. Mindless.
Anyway, Cool video dude!
That is freakin weird.
so if the moon truly affects the earth and its tides, why do people think astrology and the influence of the planets is so far fetched?
Because gravity is a law of nature and astrology is not...
So the water is around the earth and not in the Earth?
This is probably one of the silliest videos attempting to explain tides I've seen in a while. Nice hat though..
Marvel at Amphidromic point if you want to understand why you are describing this in a less than accurate way.
This is rubbish.. explain why the UK have 2 tides every 24hours .outside Europe have 1 tide and Jamaica and surrounding islands have no tides
The explanation for the bulge in the back is not convincing
It’s a residual bulge.
Why don’t the lakes have tides?
They do. Next
mimir from god of war?
Water can’t stick on the outside of a ball. Every 5 year old knows this. How do you explain amphidromic points all over the earth??
It doesn't stick on a flat surface, just runs off and spills over the side!
@@karhukivi lol. Do you have measurements proving convexity on a lakes surface?
All land surveys for canals have to use tables for curvature and refraction, otherwise canals would drain towards one end. You have a computer and the internet, go use them to study how topographic surveys are done.
@@karhukivi I know that canals have to be flat and level. This is why they use lock systems for traversing land at higher elevation
Seems like everyone has a different explanation for the bulge on the other side of the planet
Now really. It’s just gravity and the lateral *inertial* motion of water the other side of our globe shaped planet.
you need to eat less acid
Perfect for elementary aged kiddos. Thanks!
And, 53 year old kiddos like me :)
I'm from the UK - and surely this shows a 'young earth' - i.e. the amount of energy to pull the water around the Earth would pull the moon in - so the Earth can't be millions of years old. A simply equation (volume of water vs. gravitation energy) would mean the moon would gravitate into the earth in 1000's of years. If the earth was millions of years old the moon would have collided a long time ago ?????
This is nonsense. If thats what you were taught in our UK schools, thats shocking. The moon is held in orbit by the centripetal force exerted by the earths gravitational field and the moons inertia. The moon is a large mass travelling at a relatively high speed. Its inertia counter acts the earths gravity to keep it in a near perpetual orbit (just like man made satellites orbit the earth). The ocean tides are responsible for locking the moons rotation and slowing the Earths rotation (almost like a braking effect) so that the moon turns on its axis once every 28 days (approx). This is why we only see the same face of the moon from earth, its tidally locked.
So if the earth turns into the bulge of water "as you say " does that mean that the water in the ocean does not rotate with the earth.
Every six hours tide change ? Nope you proved nothing.
It is proven every day, every 6 hours actually. Visit a beach, any beach, anywhere on Earth.
I don't understand this
What is it you don’t understand. It seemed quite clear to me
yo
prove it
Take a science class, and pay attention.
Unfortunately factually incorrect so of no use at all and grossly misleading.
Yes. Unfortunately this can be said for 99% of TH-cam tide videos 😕.
What is incorrect exactly, and why? If you have proof that this is incorrect, please present it. We are waiting...
@@nathancook2852 What is incorrect exactly is that this is not how the tides are raised at all. Unfortunately there are an awful lot of these supposed explanations on the internet and many of them are from reputable sources who should know better. The assumption that these people make is that the Moon’s gravity acts directly ‘upwards’ as a lifting force and thus raises the tides. If this were so there would only be one tide a day and it would be a very peaked or pointed tide in the form of a Roche lobe such as is formed in an accreting binary star. Earth’s tides are flat-topped or domed and arise on both sides of the planet so that there are two high tides a day. Newton realised that the Moon’s gravity must be responsible for the tides but he knew that the magnitude of the direct lifting force from the Moon at the Earth’s surface is only about one ten millionth of a ‘g’ and is therefore incapable of lifting anything. If it were strong enough to lift the tides directly then it would also raise everything else in the sub-lunar region of the Earth’s surface and the rising and falling of the oceans would not be discernible.
It took the great mind of Pierre La Place to explain the tides mathematically in the late eighteenth century in his eponymous Tidal Equations which are differential equations that are still used today. The conceptualisation isn’t obvious and may even be said to be counter intuitive which is why earlier scientists missed it and perhaps why there are still so many falsehoods put about concerning the tides today.
The first thing to realise is that only at the exact sub lunar and antipodal points does the Moon’s gravity vector point exactly upwards at right angles to the Earth’s surface. Away from these points the vectors all ‘lean over a bit’ in order to point at the Moon. This generates tiny horizontal forces that all point towards the sub lunar point on the side of the Earth nearest the Moon, and towards the antipodal point on the side furthest from the Moon. Although the forces are tiny, they are crucially not swamped by Earth’s gravity which is always at 90 degrees to them. They are also convergent and cumulative over many thousands of square miles of ocean. They combine to form a tractive force on the oceans, which because sea water is incompressible, is sufficient to raise tides of a few metres in height. This model also explains the flat topped or domed shape of the tides and of course the second and slightly smaller tide of the day.
Is that beard real
LIES, in real life the sun and moon are abut the same size and WHY doesn't large lakes or lakes in general have tides ?
Kindly redo video and NO BS this time ?
Lakes do have tides you Cupid STunt.
@@awatt So your saying all lakes have tides? WHERE ?
@@milfinu
All of them.
You don’t know what you’re talking about Fuzzy Duck?
The force of gravity depends on the mass. Oceans weigh much more than lakes, and lakes weigh more than us, so the biggest tides are in the sea, very small tides occur in lakes (depending on how much mass of water is in the lake and how large an area it covers, as the water will have to move from one end to the other. A long lake will show this effect better than a small round one which won't show any effect at all. In geophysical gravity measurements using very sensitive instruments, the earth itself moves up and down under the moon's attraction, we call the "earth tides" unsurprisingly.
If gravity pulls the tides higher, WHY DONT THINGS WEIGHT LESS , INCLUDING US, DURING HIGH TIDE. this is pseudoscience babble.
The misconception, indeed, is that things get 'pulled up' by gravitational attraction by moon and sun. That's not possible. You cannot lift anything against earth gravity, using a force which is 10,000,000 times weaker.
@@TribusMontibus The pull of the moons gravity is 1/6th of that of the Earth actually, but the moon actually pulls on the entire earth. It is just able to move the water more easily, because, you know, liquids are not held in fixed positions like a solid is.
Wow, just wow...
@@nathancook2852 Hello Nathan,
It appears that you have quite a few misunderstandings there. The pull of the moon's gravity on a mass at its surface is indeed approximately 1/6th of the pull of Earth's gravity on an mass on Earth's surface.
Even if you could suspend the moon at 1 m above a 1 kg mass on Earth's surface (the moon would long before break up, being inside the Roche limit),
It would not lift the mass by a fraction of a mm, whether that mass is solid or liquid.
That's just not how tides work. Yet, the majority of people mistakenly believe it does.
@@TribusMontibus Again, you dispute, but provide no explanation or data to prove anything you say. Also, we are not talking about lifting a mass. We are talking about a constant relationship that is happening between the gravity of the two objects. There is always a bulge of water on one two sides of the Earth - the side facing the moon, and the opposite side. The bulge is always present, because of the balance of the gravity between the two objects. As the Earth rotates on its axis, part of Earth moves through this bulge, and experiences high tide, while other parts move through areas where there is less water, and they experience this as low tide. Where is your proof otherwise? You just keep saying these explanations are wrong. Provide evidence.
This theory makes zero sense
Just because someone doesn't understand it doesn't make it false. Prove him wrong.
FAKE
You think u can do better?
@@astheticz849 Of course. Way better.
@@Flat_Earth_Addy
Globe confirmed 💯🌎
@@awatt nope
@@Flat_Earth_Addy
Show me the flat.
I want to see the flat.
Globe confirmed 💯🌎
I'm from the UK - and surely this shows a 'young earth' - i.e. the amount of energy to pull the water around the Earth would pull the moon in - so the Earth can't be millions of years old. A simply equation (volume of water vs. gravitation energy) would mean the moon would gravitate into the earth in 1000's of years. If the earth was millions of years old the moon would have collided a long time ago ?????
If you're from the UK then our education system is worse than I thought. Just look at the equations for orbital mechanics (those simple equations that let us put satellites in orbit around earth and other planets) then you will see why the moon will stay in earth's orbit for billions of years irrespective of our tides.
no