Why Do Boats Make This Shape?
Рет қаралды 464,161
3 жыл бұрынGo to nebula.tv/minutephysics to get access to Nebula (where you can watch the extended version of this video), plus you'll get a 20% discount on an annual subscription.
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
@Barwasser 3 жыл бұрын
0:31 "In this video, we are gonna explain exactly where this shit comes from." can't unhear it.
@l.w.1014 3 жыл бұрын
I don't even know what he really says. All I hear is shit
@Oscar-ud8xs 3 жыл бұрын
@@l.w.1014 i think it's shape
@ArchangelExile 3 жыл бұрын
Lol, I was going to post this too but I think he said "shape".
@thebush6077 3 жыл бұрын
bruh sammmeee
@samsalphie9218 3 жыл бұрын
shift, maybe
@flamingburritto 3 жыл бұрын
Appreciating the fact that i get content like this for free.
@juliang8676 3 жыл бұрын
This
@ignacyn5346 3 жыл бұрын
not really, you are paying with your time spent on ads, still its not too much I think :)
@juliang8676 3 жыл бұрын
@@ignacyn5346 be quiet
@creativecreepyturtle1562 3 жыл бұрын
Internet bills, your PC, electricity bills, your internet router
@AwesomeTiger267 3 жыл бұрын
@@creativecreepyturtle1562 the content itself is free
@veritasium 3 жыл бұрын
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
@shaunsfx3845 3 жыл бұрын
Hello
@pulkitmohta8964 3 жыл бұрын
Can gravitational waves make similar or really different yet beautiful patterns from which we can do some awesome science?
@rtravkin 3 жыл бұрын
@@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…
@nicepajuju3900 3 жыл бұрын
@@pulkitmohta8964 no because gravitational waves travel at the speed of light and u would have travel faster to create this phenomenon.
@harshpatel6419 3 жыл бұрын
I think it is time to colloborate man
@smartereveryday 3 жыл бұрын
Awesome video. Way more complicated than I thought!
@user-rc8bb7yb1e 3 жыл бұрын
high there
@kundanborakb 3 жыл бұрын
Yes visualization makes easy to understand.
@iwishexamsneverhappened 3 жыл бұрын
Omg
@sohamduttaroy5676 3 жыл бұрын
Sup Derek
@sankalp2520 3 жыл бұрын
Just 4 replies? last time I was this fast when I was a sperm.
@kswiorek 3 жыл бұрын
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.
@2KOOLURATOOLGaming 3 жыл бұрын
Are you sure? I think they still draw some stuff like the boat, water waves and "dispersion" text.
@matthewhubka6350 3 жыл бұрын
@@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
@davidshi451 3 жыл бұрын
On the other hand, this means we get more videos on a more regular basis! There's always a tradeoff.
@bored_person 3 жыл бұрын
It allows for more complex visuals.
@NHCH 3 жыл бұрын
If you look at 3:21 you can't tell that that isn't hand drown
@igoregalado5590 3 жыл бұрын
It's a bit late at night, but they posted, so I'm now a *wake*.
@Cumgguzzler 3 жыл бұрын
Bruh over here it’s 9 A.M
@justanotherhooman7057 3 жыл бұрын
@@Cumgguzzler same
@vasubhyadiwan7615 3 жыл бұрын
Coolest dad joke I heard in a while
@NKY5223 3 жыл бұрын
This isnt MinuteEarth. Edit: All puns belong to MinuteEarth.
@Gamewizard13th 3 жыл бұрын
Mood
@hauphan917 3 жыл бұрын
Damn, I didn't even notice they all have that pattern. Thanks for making these all contents available for free.
@scienceentanglement2180 3 жыл бұрын
Lets appreciete the hours of investigating, animating, drawing... all this for free. Thank Minute of Physics
@yungmurakami6002 3 жыл бұрын
“Free” as in ads + paid promotion but yeah the gratitude is still there, it works for all.
@kirabey8946 3 жыл бұрын
@@yungmurakami6002 you dont pay sh*t for this quality content, that means its free.
@yungmurakami6002 3 жыл бұрын
@@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 KZfaq is a legit money-making platform. 🤡
@lilacdoe7945 3 жыл бұрын
@@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.
@theglobalwarming6081 3 жыл бұрын
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
@codyx8273 3 жыл бұрын
i love learning things i never knew i wanted to know
@omercoh2 3 жыл бұрын
0:39 this is a bit misleading, because light waves also disperse when not in a vacuum (which is always)
@dj_laundry_list 3 жыл бұрын
This is so good that I though I should leave a comment to boost engagement
@shlok975 3 жыл бұрын
Yeah me too
@lewisleslie2821 3 жыл бұрын
No way, me too!
@MetzanV 3 жыл бұрын
Silly KZfaq algorithm. I'll do my part for boosting engagement nonetheless.
@withlessAsbestos 3 жыл бұрын
I though so too
@silbermund4253 3 жыл бұрын
Hehe same😉
@browzy2000 3 жыл бұрын
Had to do a double take when he said “shit” 😂
@Zandezz. 3 жыл бұрын
Same here
@tonydai782 3 жыл бұрын
he said shape
@shade0636 3 жыл бұрын
@@tonydai782 Source?
@tonydai782 3 жыл бұрын
@@shade0636 it makes more sense considering what the captions say
@shade0636 3 жыл бұрын
@@tonydai782 Yeah good point.
@joshuaferry2095 3 жыл бұрын
This definitely not a comment just to boost engagement because I really like this video.
@ShirinRose 3 жыл бұрын
+
@thephysicistcuber175 3 жыл бұрын
I absolutely love fluid dynamics.
@animationspace8550 3 жыл бұрын
I appreciate you changing the thumbnail and title to make it more clear what you are explaining here
@kennarajora6532 3 жыл бұрын
I had no idea he changed the title. Its only been 10 hours.
@LeonBlack666 3 жыл бұрын
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.
@kr8771 3 жыл бұрын
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
@alveolate 3 жыл бұрын
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.
@tuckerricklefs4830 2 жыл бұрын
You do a great job at explaining complicated things in a way that is understandable. Good job!
@peterzhao3387 3 жыл бұрын
Minute physics finally posts minute videos again
@TheScienceBiome 3 жыл бұрын
Ayy you are uploading much more frequently now, it's great to see!
@alexmakar9579 Жыл бұрын
Fantastic visualization of a surprisingly complex topic! Thank you.
@kilimanjarocruz660 3 жыл бұрын
This is brilliant science communicating: Very interesting topic explained in an engaging way. Thanks, as usual, Henry!
@aok76_ 3 жыл бұрын
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.
@mousammallik7526 3 жыл бұрын
This is good stuff. Appreciate your efforts, Henry.
@sailorgeer 3 жыл бұрын
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!
@2Jackrabbit 3 жыл бұрын
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.
@niteshpant1099 3 жыл бұрын
the result was so satisfying that I started smiling at 2:55
@lonestarr1490 3 жыл бұрын
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.
@jemimahrajakumar7770 3 жыл бұрын
Me too. It's so beautiful. And the way he says it, he sounds like he is happy too 😊
@UnlaunderedShirt 3 жыл бұрын
Awesome video! Super clear and concise! Keep it up
@JohnSmith-gs4zv 3 жыл бұрын
Wonderful! This was the most comprehensible explanation for wave dispersion I've ever seen!
@kendallfield9557 3 жыл бұрын
Watching this really made my day. Absolutely wonderful!
@MSavva91 4 ай бұрын
One of the best physics videos I've seen on KZfaq
@falfires 3 жыл бұрын
This is a beautiful and elegant explanation of an equally beautiful and elegant phenomenon. Thanks
@minhdatcongty7568 3 жыл бұрын
This is extremely wonderful! I love this video! Thank sooooooo much!
@muninnsmith7958 3 жыл бұрын
Yessssssss. I've been studying this!!!! Wooooooooo. I'm stoked to see you make a video on it!
@Ashwini_SK 3 жыл бұрын
WoW!!! fluid dynamics never fails to surprise me.
@KnowArt 3 жыл бұрын
really really good explanation! well done
@user-sv7kh6ez8u 3 жыл бұрын
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.
@GeekyMan 3 жыл бұрын
This is soooo cool!😍😍 Thank you for sharing this kind of super cool interesting facts with us.
@spacejelly2910 3 жыл бұрын
This is beautiful! Thank you for sharing
@Apollo_XII_ Жыл бұрын
At 0:30 it really sounds like you're saying "... exactly where this shit comes from," and I can't unhear it.
@Lotschi 3 жыл бұрын
Wow, I love this video! Really interesting and well explained.
@tinytwinkels7113 3 жыл бұрын
your all videos are very helpful for all
@ciaaagent 3 жыл бұрын
Beautiful knowledge as always
@robertschlesinger1342 3 жыл бұрын
Very interesting, informative and worthwhile video.
@forrest7393 3 жыл бұрын
really love the animation. It helps me to understand so much easier
@zane_sadauskis 3 жыл бұрын
Such a simple solution but such a complex idea i love it, great work
@TheOskay00 3 жыл бұрын
Learnt about this in wave mechanics last year, but this was a very intuitive explanation. Thanks for posting!
@likithstochastic 3 жыл бұрын
Brilliant analysis! I always thought about this, but never in terms of dispersion.
@NullNoxproduction 3 жыл бұрын
Great video with wonderful value. 😃
@foxtp 3 жыл бұрын
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!
@jamieNZ 3 жыл бұрын
So insightful! I never knew wakes could be described like this
@bralex6669 2 жыл бұрын
Videos like this is why I love this channel.
@jvrcorna14 3 жыл бұрын
So simple, yet so beautiful!
@VAM_Physics_and_Engineering 2 жыл бұрын
I always wondered about this ever since I was a child.. Thanks for making this.
@ryanbegley7098 3 жыл бұрын
Absolutely love this channel
@TruthNerds 3 жыл бұрын
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
@metroidandroid 3 жыл бұрын
that is an approximation
@vishwajeetprasad1729 3 жыл бұрын
Great video. Never think about it in this way
@rev_dude 3 жыл бұрын
Another episode of things I didn't know I needed to know but know now after a well made, concise video
@BeeWhere 3 жыл бұрын
Love this type of content. Thanks form teaching the world :)
@pershae88 3 жыл бұрын
Nice info. Thanks
@geohistoryindia1209 3 жыл бұрын
Love 💝 your amazing work From Curious Physics 🔥
@phyrohit 3 жыл бұрын
Great explanation
@StevensSounds 3 жыл бұрын
This is so fascinating!
@jackpisso1761 3 жыл бұрын
Really nice. Thanks.
@joshyoung1440 Жыл бұрын
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.
@metropolisss 3 жыл бұрын
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 ;)
@eplumer 3 жыл бұрын
This was awesome explanation
@Liugreenslade Жыл бұрын
This was both awesome and beautiful
@eryndil 3 жыл бұрын
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.
@adamiotime 3 жыл бұрын
This was just... Beautiful.
@mumblbeebee6546 3 жыл бұрын
Very cool, thank you!
@PendoraBox 3 жыл бұрын
Finnaly one of my childhood questions are answered. Thank you physics minutes
@allenholloway5109 3 жыл бұрын
This is amazing, thank you.
@eduliborio8 3 жыл бұрын
Amazing video!
@13thravenpurple94 Жыл бұрын
Great work 🥳🥳🥳 Thank youuuu 💜💜💜
@Cr42yguy 3 жыл бұрын
I knew about dispersion in optics for ages and was still surprised by water wave dispersion.
@joshuahendrickson8694 3 жыл бұрын
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.
@markschreyer6017 3 жыл бұрын
Very great visuals
@bazoo513 Жыл бұрын
1:27 - "Mach cone" - exactly! :o)
@gdpvk 3 жыл бұрын
Propulsion's toughest enemy explained to see the beauty in em. Thanks for the content
@buckyball2003 3 жыл бұрын
This video reminded me of why I love Physics. Thank you so much.
@juliang8676 3 жыл бұрын
Doing a wave motion module at university right now and knowing a little about the actual maths behind this is lovely
@kaustubhhirve7734 3 жыл бұрын
simply fantastic
@jyothishtr6460 3 жыл бұрын
You have started uploading again love your channel sir❤️
@tanvirfarhan5585 3 жыл бұрын
I am watching this while having a online physics class with exactly this discussion going on
@tommihommi1 3 жыл бұрын
you have class on sundays?
@asifalamgir5135 3 жыл бұрын
Bangl;adeshi>:?
@_John_P 3 жыл бұрын
@@tommihommi1 He's probably just catching up, but I had lab work every Sunday for the duration of my engineering course.
@tommihommi1 3 жыл бұрын
@@_John_P my condolences. Only people putting in crunchtime for their thesis do stuff on weekends here, and the university buildings are closed on the weekend
@tanvirfarhan5585 3 жыл бұрын
@@tommihommi1 yeah in our country we have holidays only in Fridays
@rasmotololopunjave 3 жыл бұрын
This was absolutly amazing
@bastscho 3 жыл бұрын
The single lines combining to the complete shape is magical!
@flakmoppen 3 жыл бұрын
Man I love this channel.
@n49945 3 жыл бұрын
I take a boat to and from work every day. I'll never look at the wake the same way again. Thank you.
@jackjac 3 жыл бұрын
I really liked the 3D animation, good job on the visualisation.
@francotomatillo 3 жыл бұрын
Excellent!
@pvic6959 3 жыл бұрын
This was a question I didnt know I had. Thank you!
@InformatrIIcks 3 жыл бұрын
That 3d animation is amazing !!!
@waqqiali2960 3 жыл бұрын
Once again, nailed it.
@pdr. 3 жыл бұрын
At first I thought this topic would be way too hard for me to understand, but this explanation made it so simple! Thanks.
@nikolasscholz7983 3 жыл бұрын
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
@ChariotduNord 3 жыл бұрын
wow this is so cool!! when all those lines added up my jaw dropped
@pocholo151299 3 жыл бұрын
You gotta love this channel
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