Why Do Boats Make This Shape?
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- čas přidán 20. 03. 2021
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This video is about the "Kelvin wake" shape of water wakes behind boats - we talk about mach angle, dispersion, superposition of many waves, and how these all lead to the pattern of a wake. We don't get into Froude number though...
REFERENCES
Boat Wake Wikipedia Page: en.wikipedia.org/wiki/Wake
Interactive Boat Wake Simulation: observablehq.com/@rreusser/di...
Feynman Lectures on Water Waves: www.feynmanlectures.caltech.e...
Building up a Boat Wake from V-Shaped Wakes: editor.p5js.org/aatish/full/b...
Wave Dispersion: en.wikipedia.org/wiki/Dispers...
Mach angle shock waves:
www.sciencedirect.com/topics/...
Ship Wakes - Kelvin or Mach Angle? Rabaud and Moisy Paper: journals.aps.org/prl/abstract...
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Minute Physics provides an energetic and entertaining view of old and new problems in physics -- all in a minute!
Created by Henry Reich - Věda a technologie
It’s amazing to see those waves come together to make the recognizable wake pattern. I didn’t know it would be that complicated but it’s really interesting to think about
Hello
Can gravitational waves make similar or really different yet beautiful patterns from which we can do some awesome science?
@@pulkitmohta8964 no dispersion for gravitational waves, I guess: they travel at a constant speed _c_ - or at least only a *very* dense matter can change that noticeably…
@@pulkitmohta8964 no because gravitational waves travel at the speed of light and u would have travel faster to create this phenomenon.
I think it is time to colloborate man
Appreciating the fact that i get content like this for free.
This
not really, you are paying with your time spent on ads, still its not too much I think :)
@@ignacyn5346 be quiet
Internet bills, your PC, electricity bills, your internet router
@@creativecreepyturtle1562 the content itself is free
Awesome video. Way more complicated than I thought!
high there
Yes visualization makes easy to understand.
Omg
Sup Derek
Just 4 replies? last time I was this fast when I was a sperm.
0:31 "In this video, we are gonna explain exactly where this shit comes from."
can't unhear it.
I don't even know what he really says. All I hear is shit
@@l.w.1014 i think it's shape
Lol, I was going to post this too but I think he said "shape".
bruh sammmeee
shift, maybe
I just noticed that for some time these videos aren't actually hand drawn like the older ones. It took me a while to notice, which means that you managed to imitate the look quite well, but I miss the drawing a bit.
Are you sure? I think they still draw some stuff like the boat, water waves and "dispersion" text.
@@2KOOLURATOOLGaming I think it’s tablet drawn with some imitation of a marker. It clearly isn’t hand drawn (if you only include paper in that) when you look at 0:40. They animated the sound waves, and there is no hand moving around like they used to have
On the other hand, this means we get more videos on a more regular basis! There's always a tradeoff.
It allows for more complex visuals.
If you look at 3:21 you can't tell that that isn't hand drown
It's a bit late at night, but they posted, so I'm now a *wake*.
Bruh over here it’s 9 A.M
@@Cumgguzzler same
Coolest dad joke I heard in a while
This isnt MinuteEarth.
Edit: All puns belong to MinuteEarth.
Mood
Damn, I didn't even notice they all have that pattern. Thanks for making these all contents available for free.
This is so good that I though I should leave a comment to boost engagement
Yeah me too
No way, me too!
Silly CZcams algorithm. I'll do my part for boosting engagement nonetheless.
I though so too
Hehe same😉
Years ago when I was riding a boat, I thought about a way to know the speed of the ship I was riding in. I got the idea because I knew that the angle of the shockwave of a supersonic thing relates to its speed, so I looked outside expecting a fine, singular wave. I got surprised about what I found and asked myself why. Thank you for finally answering this
Lets appreciete the hours of investigating, animating, drawing... all this for free. Thank Minute of Physics
“Free” as in ads + paid promotion but yeah the gratitude is still there, it works for all.
@@yungmurakami6002 you dont pay sh*t for this quality content, that means its free.
@@kirabey8946 yes, I know I don’t pay for shit. I’m perfectly aware of that. But the channel is funded through ads and paid promotion. If that wasn’t the case, the quality and time put into the videos wouldn’t be the same, or they’d be far less frequent. You’re underestimating the fact that CZcams is a legit money-making platform. 🤡
@@yungmurakami6002 You're focusing on the creator's perspective. From the user/viewer perspective it is without any cost, especially if you have ad blocker, which means it is free. If OP said, "let's appreciate Minute Physics releasing this for free", you'd be correct, but with their wording, you are not.
i love learning things i never knew i wanted to know
0:39 this is a bit misleading, because light waves also disperse when not in a vacuum (which is always)
This definitely not a comment just to boost engagement because I really like this video.
+
Had to do a double take when he said “shit” 😂
Same here
he said shape
@@tonydai782 Source?
@@shade0636 it makes more sense considering what the captions say
@@tonydai782 Yeah good point.
These are the questions we never ask but definitely need the answers of, and i can understand how amazingly hard it can be for someone to even think of such a question that is original and not already answered from other bigger channels , really great job mate.
I absolutely love fluid dynamics.
I appreciate you changing the thumbnail and title to make it more clear what you are explaining here
I had no idea he changed the title. Its only been 10 hours.
i really enjoy the pacing in your videos. and going back to put all the components into one concept really makes for a smooth finish. love it
Now I wanna do physically accurate wake shader !! Thx minutephysics you're always amazing and straight to the point and leaving us with just enough to dig through if we want to get deeper, but with the proper terms.
You do a great job at explaining complicated things in a way that is understandable. Good job!
Excellent video and awesome graphics to illustrate a complex topic in an intuitive manner! I’m an engineer who sometimes does navigation studies (including wake generation studies), and while I’m familiar with the math, this presentation makes the concept much easier not only to understand the physics but also connect the dots between textbook drawings of waves to what you actually see in real life. Well done!
I've always wondered about this and spent any boat ride just looking at these waves trying to figure them out. Thank you for this clear and beautiful explanation.
This is brilliant science communicating: Very interesting topic explained in an engaging way. Thanks, as usual, Henry!
Ayy you are uploading much more frequently now, it's great to see!
Never thought I'd be interested in the physics of boat wakes, but the way you present your content makes literally anything interesting. Great video!
Wonderful! This was the most comprehensible explanation for wave dispersion I've ever seen!
Fantastic visualization of a surprisingly complex topic! Thank you.
This is good stuff. Appreciate your efforts, Henry.
the result was so satisfying that I started smiling at 2:55
And I started wondering, why no single videogame that includes swimming or boats got that right so far. It seems not too hard to implement. Would add a ton in terms of visual appeal.
Me too. It's so beautiful. And the way he says it, he sounds like he is happy too 😊
Learnt about this in wave mechanics last year, but this was a very intuitive explanation. Thanks for posting!
So that is how hamon works! Finally, I understood it, not even all 8 chapters of JoJo let me know the exact method, but this channel do.
WoW!!! fluid dynamics never fails to surprise me.
Watching this really made my day. Absolutely wonderful!
This is a beautiful and elegant explanation of an equally beautiful and elegant phenomenon. Thanks
Yessssssss. I've been studying this!!!! Wooooooooo. I'm stoked to see you make a video on it!
This is extremely wonderful! I love this video! Thank sooooooo much!
Such a simple solution but such a complex idea i love it, great work
really really good explanation! well done
Awesome video! Super clear and concise! Keep it up
really love the animation. It helps me to understand so much easier
So insightful! I never knew wakes could be described like this
Thanks! Over time I'd gotten lost in doing calculations and forgotten what a dispersion relation *really* is. These visual really help remind me of the physics underlying all of the math.
Doing a wave motion module at university right now and knowing a little about the actual maths behind this is lovely
Minute physics finally posts minute videos again
Very interesting, informative and worthwhile video.
Brilliant analysis! I always thought about this, but never in terms of dispersion.
Wow, I love this video!
Really interesting and well explained.
This is soooo cool!😍😍 Thank you for sharing this kind of super cool interesting facts with us.
Another episode of things I didn't know I needed to know but know now after a well made, concise video
Videos like this is why I love this channel.
This is beautiful! Thank you for sharing
your all videos are very helpful for all
I always wondered about this ever since I was a child.. Thanks for making this.
Great video. Never think about it in this way
Beautiful knowledge as always
So simple, yet so beautiful!
I’m loving these videos! Thanks for the effort. Always very nice illustrations. May I suggest something? It would be great if you did videos with black backgrounds and white drawings. That would be much better for the eye and the battery of the device too ;)
This video reminded me of why I love Physics. Thank you so much.
This was just... Beautiful.
Great video with wonderful value. 😃
Video was cool and all but I just wanted to appreciate the use of a very nice iv-I release in the figured bass of your background music. I'm seeing more expressive themes while still working in a universally safe sort of space, well done.
I love your concise videos, and this is no exception! I do prefer the old music better with the single bass. Having the music at a low frequency, away from your mid vocal range is less distracting.
The single lines combining to the complete shape is magical!
Absolutely love this channel
Finnaly one of my childhood questions are answered. Thank you physics minutes
At first I thought this topic would be way too hard for me to understand, but this explanation made it so simple! Thanks.
Love this type of content. Thanks form teaching the world :)
Very impressive! One little clarification for 0:43 : The speed of sound in an ideal gas varies only by temperature and not e.g. by pressure. Specifically, it is proportional to the square root of absolute temperature, which is the result of particle speeds in a Maxwell-Boltzmann distribution.[1]
It varies by altitude because temperature does, but you can't really say it's 343 m/s in dry air at sea level because sea level does not imply a specific temperature.
[1] en.wikipedia.org/wiki/Maxwell%E2%80%93Boltzmann_distribution
that is an approximation
Awesome explanation, thank you! I'm surprised that the dispersion relation seems so simple though. For light in glass those dispersion relations tend to get quite complicated
This was both awesome and beautiful
Love 💝 your amazing work
From Curious Physics 🔥
Nice info. Thanks
You have started uploading again love your channel sir❤️
This is amazing, thank you.
This was a question I didnt know I had. Thank you!
Really nice. Thanks.
Very cool, thank you!
Wonderful! I have often thought of this but never figured out the physics in my head! Now I'm really curious how to calculate this angles and why they're always the same...
wow this is so cool!! when all those lines added up my jaw dropped
This is so fascinating!
the progression in the video is just so satisfying... you get a buncha video clips, all these simple concepts, lines, wavelengths, and then BOOM you get a 3D rendering that looks EXACTLY like the clips at the start.
won't be long before we get a supercomputer to render all the particles on earth in real time.
simply fantastic
This was absolutly amazing
I really liked the 3D animation, good job on the visualisation.
This is so interesting and fascinating , i always wondered wtf happen to ship waves
One of the best physics videos I've seen on CZcams
It's been a long time since a science video gave me a mouth wide open stunned moment. Thank you Henry!
Great work 🥳🥳🥳 Thank youuuu 💜💜💜
Awesome and very well explained. I work in 3D and would love to hear more about how you generated this 3D image 3:00. Thanks!
Amazing video!
This was awesome explanation
Monday's are quite dull in my subscriptions so a new Minutephysics video makes the whole day much, much better. 😀
Man I love this channel.
Thanks, this was great. I was wondering about this last summer, as I was watching boats and the wave patterns from a cliff. My SO doesn't share my appreciation of fluid dynamics for some reason though.
Great explanation
Very great visuals
I dont know i needed to know this, but I guess I did, and now I do. That's some great information.
might be overall one of the best short videos on physics out there.
Once again, nailed it.
Great way to “wake” up, a notification of a new Minute Physics video! 🙌
I see what you did there, clever.