How does a whip break the sound barrier? (Slow Motion Shockwave formation) - Smarter Every Day 207

Behind the Scenes: • How does a Whip Break ... Download Skunkworks! www.audible.com/Smarter or text "smarter" to 500-500 (30 day free trial)
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GET SMARTER SECTION
Check out Derek's video about Schlieren Photography on Veritasium!
• How To See Air Currents
The awesome German Paper:
link.springer.com/article/10....
University of Arizona paper:
www.e-kaczor.net/keiko/whip.pdf
History of Shock waves:
books.google.com/books?id=Pmu...
~~~~~~~~~~~~~~~~~~~~~~~~~~~~
April Jennifer Choi is a Mechanical Engineer and Professional Whip Artist from Peoria, IL. She has a Master's Degree in Computational Fluid Dynamics as well as several Guinness World Records in Whip Cracking. April is also a well known Fire Performer and you can check out what she does on Social Media through these links.
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Disclaimer:
“Information related to UAH contained in this video is subject to change by the appropriate officials of The University of Alabama in Huntsville without prior notice. Material and information in this video do not serve as a contract between The University of Alabama in Huntsville and any other party and do not serve as an endorsement of any paid sponsor of this video.”

[@MalikMcPhersonAnthony]

Bruh instant subscription

[@smartereveryday]

Thanks Bruh. Hit that bell if you're up for it.

[@IMuradI]

Totally!

[@rainbow_flare_]

Same

[@cheekybum1513]

I’ve been watching for years yet just realized I wasn’t subscribed

[@GODDEVA]

🙏❤️😍😘🌼🗣️🎆🛐✝️

[@veritasium]

Destin, this is some serious hardcore science! AWESOME!

[@EisenFeuer]

You know what that morning upload means... Destin's been awake the entire night. Thanks for stopping by Derek!

[@smartereveryday]

Never could do the colored schlieren as well as you did! Check Derek's video out here: kzbin.info/www/bejne/aqXKgKyLaJl3apY

[@malikomuchimba6876]

This is why I love science. Science is progressive learning and I can see my future children in their science class looking back at fluid dynamics when it comes to this discovery thanks to you.

[@gangsterkami1]

​@@smartereveryday​I love the video you guys did on the coriolis effect!! much love from england

[@bruperina]

You guys are literally making history. Do you understand that there’s a whole new scientific community behind you guys? Brace your gray hairs Derek! Congratulations.

[@wavydavy0389]

One moment in my life I was eating spaghetti and I slurped a single noodle as fast as I could and I got whipped in the face by the end of the noodle. Thanks to this data I understand now why the spaghetti noodle acted as a bull whip.

[@emperorvibez9284]

That's facts.

[@dripsin77]

That's a different level of unlucky that happened to me aswell

[@_Mqube]

Got whipped by a noodle

[@mrkibblez]

LMAO 😂 I read that entire thing wrongly

[@hashtagyolo5675]

Spaghetti broke the sound barrier

[@OfentseMwaseFilms]

That ladies kids are the most disciplined kids on Earth.

[@bread5050]

You watching this just now well you are not alone.

[@krismanibrahim4632]

@@bread5050 late 1 day

[@TylerS9812]

Bro me too

[@waldiniman]

Chanclas got nothing on her whip

[@josephbennett3482]

Sure because she cracks the whip all of the time 😋😁🤣

[@the_magic_max9491]

In case anyone wonders about the strange costume in the german paper at 4:11 😂 ...this is traditional carneval in southern germany, to be exact in the Region around the Black Forest. One key element in this tradition, besides the costumes, is the whip cracking to scare the winter ghosts away. Greetings from the Black Forest, Germany😉

[@icicle3120]

Is it a moose or a reindeer?

[@the_magic_max9491]

@@icicle3120 I think it's none of them

[@Blvd40]

Amazing! Thanks for the insight. I thought it was one of Santa's Christmas reindeer. 🤭

[@the_magic_max9491]

@@Blvd40 Haha you're welcome! There are always new things to learn😋

[@Karlosfrankos]

Grüße aus Calw 😂

[@danieljensen2626]

>Goofs around with a high speed camera. >Accidentally gets a PhD in whip mechanics.

[@MarkTulewicz]

3) . . . 4) Profit !

[@Kumquat_Lord]

This is why I love the internet. You can take something as unbelievably complicated as a supersonic physics and make a compelling video simple enough for a common person to understand. Not only that, but you're showing things that are likely the world's first observations, and sharing them with the entire world

[@MultiAsdasad]

@Mephisto Pheles yeah, but thats why we have to look for quality content/channels like this one right here

[@BlackPDigitalMedia]

she blinded me with science!

[@kummer45]

The world is complicated enough at different time speeds and scales. It is all there, he is the Wizard that makes us see what really happens in our quotidian world. He gives a good name to his University. This is the BEST WAY to promote education. Everybody will drop 50,000 dollars on a physics or engineering education without any hesitation.

[@oldmanc2]

It's the distribution of interesting observations that is the difference. When I needed to understand supersonic (flight) I had to go to the University Library. Now I sit at home with coffee and toast and hit search and CLICK!

[@oldmanc2]

The problem is all the interference and distractions on the Web and it's hard to find channels like this without accidentally looking at bikini try-ons

[@panther-nk2hn]

Honestly, I'm still just impressed that people figured out how to make the whip do that hundreds if not thousands of years ago. And only NOW do we understand exactly why it does that. So cool.

[@Tactical.daesh.operations]

Same bro

[@deathbyunicorn5213]

There's thousands of inventions that humans made without even the slightest clue what we were doing and I love it

[@justalonesoul5825]

In another field, we still dont know at all how molecules like aspirin or paracetamol "work"... It's the case for boatloads of older pharmaceutical products. Nowadays the mechanisms need to be understood before the drug is even admissible to trial...

[@grantcunningham3646]

Nice that people picked up on the scripture

[@mrfooledyaa5430]

Like how bikes work, fascinating stuff.

[@Yeagerists1321]

"She's good with whips" Me: "Continue"

[@moderator8247]

Why

[@pablotn2976]

Yuichiro.

[@BoianTV]

I'm pretty sure she likes to be called a she, but that back says she's factually a he 5:22

[@zodiac6007]

@@BoianTV she do be a she tho

[@ethancntower8850]

@@BoianTV I was wondering about that. The voice is a giveaway..

[@danniboi07]

"Let's make a KZbin video!" "Let's publish research!!!!"

[@TheWormzerjr]

IT GOES FASTER THAN THE SPEED OF SOUND IS THE ANSWER

[@vanerek]

Why not both?

[@martinsap8143]

@AIDYS LAYN it would be much better if you didn't whisper and used your voice more precisely, good job anyways, keep it up :)

[@RiggingDoctor]

This is why I love this channel. KZbin videos that are worthy of being published studies.

[@Maverickx89]

thunderf00t had also quite surprising paper grow out of a youtube project - he had also include aknowledgement of help of his patreon supporters into it.

[@flymypg]

OMG! 40 years ago a girlfriend convinced me to join her in an evening class where we made our own braided leather bullwhips from scratch. We started with tanned hides, sliced them, shaved them, dressed the strips to precise tapers, oiled then braided them. It took a team of two about 20 hours to make both whips. Then we got to learn various techniques, from gently capturing things (we learned to wrap our whip around a balloon without popping it), to wrapping hard enough to break things (my favorite was sidewalk chalk, which exploded). But the best part was learning to crack our whips. We started by simply rolling the loop of the whip down onto the floor, where it would snap when the tip smacked down. Then we gradually added more energy, a truly small amount at a time, until it started to crack in the air. Large, graceful motions that finished with a crack. Then we learned quicker moves that brought the snap a little closer in, where we learned to place it where we wanted it. I envied the folks who were ambidextrous with their whips, because my right arm was getting ready to fall off. We wanted to see if we could capture the motion of the whip by cracking it horizontally over sand, so a few of us took our whips to the beach and tried to crack the whip horizontally within an inch of the sand. Almost impossible to do, but once in a while we did notice a puff of sand happening well before the whip had reached full extension, from a part of the whip not in contact with the sand. If only... Fast forward 25 years, and I was on the team making a camera that could take 100,000 frames per second (the Redlake HG-100K). When the third alpha unit became the first to work at full speed, we searched for targets that would both test the camera and thrill Marketing. Popping a balloon wasn't nearly fast enough. I thought back to my days with the bullwhip, and we immediately went out and bought a few. Despite dumping a zillion lumens into the field of view, nothing useful came of it. (Clearly, using Schlieren photography and capturing the shockwave is crucial.) What we did wind up doing was pointing the camera at the HID bulb in an Epson video projector (torn from the ceiling of a conference room), where we captured the most amazing video of the arc wandering between the electrodes within the bulb envelope. We put a GIF of the sequence up on our website (this was before KZbin), which caused some small level of buzz online. The next morning we received phone calls from the Japanese executives of both Epson and Panasonic (the maker of the bulb). It turns out that arc wander was the primary factor limiting projector sharpness, so stabilizing the position of the arc was crucial to gaining any benefit from using higher-resolution LCDs. Two days later they were in our offices for a demo, and left an awesome pile of money behind when they departed with our very first beta unit. Their problem was that high-speed film limited the rate of innovation to one test run per day, with the film developed overnight: Our camera allowed them to do a dozen runs every day, leaping their R&D further ahead of the competition. You may have noticed I mentioned we had to go out and buy some bullwhips. My treasured handmade bullwhip had disintegrated within a year of making it: Evidently, the tanning process used on the leather wasn't compatible with the oil we applied to it. It sure was fun while it lasted. Now you two have got me wanting to make another one!

[@aryanlohani622]

😅 sorry bro too long

[@neurofiedyamato8763]

Pretty nice story.

[@Namster05]

Wow, that was interesting to read

[@loodakid]

What a great story! The Epson and Panasonic meeting sounds incredible and satisfying.

[@Mrcaffinebean]

BobC great story!

[@furn2313]

This made me realise that Einstein would probably have a KZbin channel too explaining science and publishing new scientific papers

[@Iarlen]

probably not though, he didn't do a lot of the "legwork" that good quality video production requires, he would obscure and probably have next to no subscribers

[@MementoMoriGrizzly]

Einsteins papers were too hard for even the greatest scientists of his day so I really doubt he would make videos when nobody would be able to follow his reasoning. When a journalist asked the British astronomer Sir Arthur Edding­ton if it was true that he was one of only three people in the world who could understand Einstein’s relativity theories, Eddington con­sidered deeply for a moment and replied: “I am trying to think who the third person is.” - B. Bryson Today the theory of relativity has been watered down so more people can understand it but if you go deeper to the more advanced stuff you will realise that its extremely unintuitive and very few people would actually comprehend it completely. There are websites like research gate which are suited for scientific papers. Einstein would be wasting his time on youtube. This video right here is baby physics compared to what Einstein did.

[@danr.5017]

I like to imagine what Einstien would have been like as a guest on StarTalk.

[@sladechain573]

*Einstein the Science guy* ?

[@Golden_Projects]

@@sladechain573 yeah, not epstein if you were thinking about him

[@davidmorgan2881]

I love how... iv been watching SED for years... and a question pops in to my head, and I youtube search it... and here you are! Perfection.

[@Mostly_Joe]

I've been subscribed for almost 4 years I believe and this has to be the most interesting video you've made in my opinion. Keep up the good work!

[@AprilJenniferChoi]

Thank you!

[@smartereveryday]

@@AprilJenniferChoi This is April everyone. Thanks again for coming to to Bama and for all the help! Let's get this analysis done and publish together!

[@bradleyhagen6407]

@@AprilJenniferChoi Thank you for helping us get Smarter Every Day! This is a fascinating and profound insight. I'm excited to see what you and Destin will publish from this.

[@SteveMillerhuntingforfood]

Next to the Ruperts Drop, which is the video that hooked me to this site. Oh, and @April Jennifer Choi , you are awesome too! Great stuff.

[@hshehawy]

I second that! It's indeed the most interesting one for me, not only here but on KZbin as well, it's my first time ever to make a comment on a KZbin video.

[@omy4888]

4:54 destin: learning stuff

[@jeanthibeaux3]

Merci le gars dans les commentaires de la vidéo de dr Nozman

[@Cyoria]

Merci Dr Nozman

[@answerinprogress]

This is so freaking cool.

[@smartereveryday]

Hi Sabrina.

[@answerinprogress]

@@smartereveryday Hi Destin.

[@inmiseryseekrootbeer4966]

SmarterEveryDay I love your videos. I nerded out so hard

[@nathanm.8823]

I can break the sound barrier with a bath towel.

[@jakescott7491]

NATHAN M. This made me laugh SO HARD!! THANKS.

[@monamoore5471]

🤣

[@marlinjojo6760]

@@sebcrakpot1234 I don't hit people with my wet towels but I can get a very loud crack out of them. I think its definitely breaking the sound barrier.

[@rollingrocky3608]

Same I just did it yesterday

[@joaofranco9751]

I've hit my sister with a big duvet. We both were amazed

[@WilliesDET]

Anyone else come here after watching Baki?

[@MikaGlitch]

I hypothesise that the knot that helps to start the force of the air breaking, leading the waves, is just enough mass change in a quick transition towards the end of that whip that is the ultimate catalyst, seeing as how the wave suddenly goes from very little mass to a sizable addition of mass, and the frayed ends are trying to catch up to the equilibriam of pressure exerted by the wave as the sound barrier is broken. Great work on this, my science bug is wanting more. Subbed for awesome whip cracking science!

[@Invrexs]

This is the type of youtube channel that deserves ad revenue and sponsors because they put work in their videos, real work. Videos that are compilations of other videos do not deserve revenue

[@jaredtimme5851]

Especially cause they're actually doing scientific research KZbin should fund that same with channels like styropyro

[@jeabo0adhd]

Also people who upload copyrighted clips and expect you to "smash that like button" for monetization.

[@smartereveryday]

I just want you to read Skunk Works.

[@vwwv9563]

wrong, this is all stolen, but it is easy to steal now due to the cheap cameras

[@heartofjustice6041]

names zeus actually wrong compilations lead people here and one of those compilations might lead the next innovator or inventor right here and onto changing the world

[@Steintastatur]

best example that everyone can relate: when you slurp on noodles and when the end of one is right before your face, it smacks you

[@aaronw2k8]

It's usually the hot water hitting me in the eye

[@jfan4reva]

@@aaronw2k8 Mine always ends up on my shirt. Insufficient velocity?

[@aaronw2k8]

@@jfan4reva Haha. It sounds like that could be the case or wrong angle

[@stisti01]

Lol

[@GalluZ]

@@jfan4reva the no-slip boundary condition doesn't work on noodles.

[@NM-uh8go]

Nozman

[@Chad-tc4jj]

Hang on I just realized something.... the whip in slo mo looks exactly like the dancing inflatable guys outside of car dealerships.. SOOO if the inflatable moved fast enough... oh god SUPERSONIC INFLATABLE MEN

[@Minelaughter]

Great 👍

[@literalfeline]

Finally, I can beat my grandma in jumbo size

[@Minelaughter]

Why did this comment get so many more replies

[@ValeRay2]

We found the orginal chad bois

[@shiningpecan6978]

@@Minelaughter they deserved them

[@chaoticinflation5766]

4:10 “there’s a dude in it that looks like a moose wearing bells and a clown suit” EXCUSE U HE’S CLEARLY A REINDEER 😤🎄

[@brianjoelbasualdo7436]

Ahh, finally, a man of culture.

[@YeppyNope]

Ah yes, The Whip-Cracking Reindeer Man...

[@Dr.feetsmeller]

Bruh

[@chickthechicken1372]

I'm dying

[@angrymario8259]

The south of Germany is a different breed of people 😂

[@stephenpuryear]

when you do this, there isn't a better channel out there! Fascinating and counter-intuitive!

[@lauraf361]

Fantastic guys, my husband use to crack whips all the time on his farm in Australia when he was young, ( his 63yrs old now ) and always wondered what caused the crack noise, and now he knows 😊. Great work. 😊😊

[@alekseysoldatenkov5675]

Contributing to research and making KZbin videos? Dope.

[@BimbusBucklenuts]

It doesn't get any more awesome than this.

[@pizzasub3194]

Aleksey Soldatenkov i was about to say that😂😂

[@red7163]

Love your channel so much. Just a simple TY.

[@jcims]

3:10 there's that look again. I see it so often in your videos...that spine tingling experience of discovery. I love it!

[@PiercingSight]

I love how this escalated from messing around with high speed schlieren photography to writing a groundbreaking paper on whip dynamics.

[@AprilJenniferChoi]

Me too!

[@jnevercast]

soundbarrierbreaking paper. Fixed that for you

[@fsmoura]

H W I P D Y N A M I C S ~

[@Benzy670]

This video was absolutely fascinating, and I feel privileged to witness this development in human understanding. Had a moment in the video where I said, “wow, that’s a lot of doctors!”

[@horseradish843]

You must consume a tremendous amount of Richard and Mortimer

[@Arexsis]

You can go be edgy somewhere else dude, this is legit cool and you're souring the mood.

[@UnclePopcorn]

Very happy to witness the moment. I think more people will start to record and study the daily science never be notice before.

[@Benzy670]

Papzi Richard and Mortimer 😂

[@Benzy670]

Arexsis what?

[@Mister_NO.]

Just two guys having fun... i love it 😆

[@13cheshirecats19]

I love this! Reminds of how, in saber fencing, a professional technique is hitting the opponents blade in such a way it “whips” around. Hurts like a mother. And also makes the tip of a saber the second fastest object in the olympics, only beat by bullets.

[@matty1214]

Asians: It's just a belt, it can't hurt anybody. The belt:

[@speaker3035]

The blank : break the sound barrier

[@altervoid3235]

Asian parent*

[@Coyote0874]

Mexican parents too lol

[@kialo2085]

Black Parents breaking the sound barrier

[@Bored_Zomb]

Latin American moms: Its just a sandal it cant hurt anybody The sandal:

[@AppliedScience]

Great work, Destin!

[@garethronaldo8692]

i agree with u ... and i love your channel

[@smartereveryday]

Thank you Ben

[@MusicBent]

It’s so nice to see when my favorite youtubers follow each other 🥰

[@mralabbad7]

Great moves Keep it up Proud of you

[@zf5782]

really great work! You should totally publish this!

[@lshadowSFX]

4:19 "I'm limited by the technology of my time"

[@nonamenopassword3397]

lshadowSFX LMAO

[@Allan_aka_RocKITEman]

Sounds like a line you could put in a movien...😝😝😝

[@hunghung9537]

He should hide it in a model of his building.

[@dutchstylz5531]

@@Allan_aka_RocKITEman that line is also from a movie xD

[@n11ls]

Yes Howard Stark

[@domib2896]

The guy in the wierd suit is part of a celebration in Southern Germany. It is called 'Alemannische Fasnet'. In this tradition, people gather every spring around February for parades. The people in the parades usually wear historical costumes. Part of this custom is to make a lot of noise with bells, ratchets and sometimes also with whips.

[@ajrupert5639]

This is why I love this channel. I thought I knew how this worked and therefore there was nothing I could learn from it, and was absolutely incorrect

[@LionNezTV]

I like your content. It makes interesting and difficult science accessable and understandable for many people without losing quality in content. I'm not a physicist but could it at the last moment when the end of the whip is like being dragged its because it breaks the sound barrier and therefore encounters less air resistance. I like when the barrier is broken the forces are not held back and thats why it seems like its getting pulled. Would love to see an update on the whip science :D

[@GroundConnection]

I love that scientist youtubers are friends together and not opponents.. but of course, they’re smart

[@franzferdinand2240]

He's not a scientist..

[@kenshinhimura7812]

He is a Government shill 🐑

[@jacksonwhitbread5503]

@@franzferdinand2240 anyone that researches and publishes papers is the definition of a scientist. We learnt this in the first year of my science degree. Just because you may have the science degree, doesnt mean you are a scientist

[@franzferdinand2240]

@@jacksonwhitbread5503 yeah true but he said that he's only a "youtuber and engineer" but idk..

[@ilhamh1596]

@@jacksonwhitbread5503 is he research or making video of ppl research ?

[@gumball1216]

9:39 dabbed so hard he teleported.

[@WebbR337]

Bold move. Thinking we wouldnt notice you trying to make us watch that ad for audible... Nice try.

[@humblenoob7631]

tHaT wAs FaSt Wa’N It

[@jakejohnson8701]

What you did is monumental/ground breaking in the field of speed/audio. You should use this information for a thesis ( with the written consent and acknowledgment of the others involved in the research/ study ), if you're planning on getting your Masters degree; Or, as a revision/update to the manuscripts you refferenced reading in the video. Great work to everyone ( the whip handler, the professors and yourself). 👏👏👏

[@kennethjanczak4900]

really great Thanks for taking the time to make the video, it was really interresting......

[@thematrix3431]

!!!! What the heeeckkk!!!! I thought this was going to be an easy answer! Then the video kept getting deeper and deeper as the mystery kept on raveling and unraveling and I got more and more confused as I realized that I know less and less and I've never been more excited to know that I know nothing! I had NO idea that a whip could be such an incredibly beautiful and complicated piece of artistry. Think about that! We have jetpacks and lasers and cars in space and still do not understand how whips work. This is so exciting and cool to me that I can't even explain it.

[@cutformllc3451]

You might say the video gave you.... whiplash

[@kworkshop]

Nice

[@kinny801]

The Matrix they don’t put too much emphasis on it because it doesn’t benefit WARS.

[@QuilloManar]

That is the exact process any scientist/engineer goes through when researching *anything*. When you come out with more questions than when you came in, you're doing science right.

[@downiemcsyndrome8067]

@@cutformllc3451 "No quite my tempo"

[@haqeeqee]

This was actually a lot more interesting than I thought it would be.

[@chitray]

My 5 year old daughter loved this video. She wanted yo see what the tiny explosion looked like that i had mentioned when she tried hitting me with a t shirt. Didnt realize this isnt a phenomenon that was often filmed. Thank you. Truly.

[@vash0091]

I liked this video, at 8 mins 25 seconds when I realized how the whip looks like it holding the shock wave like it was a ball , and the Shockwave got bigger the further it traveled the whip. And it wasn't until the tip of the whip started coming out of loop at the end . The force behind the whip loop grew stronger and then there wasn't enough whip material left at the beginning of the shock wave to hold back that collection of energy from the speed f the whip. I looked at the Shockwave as it's water and you could cast out a tarp into water . And pulling in the tarp is the same has the whip being extended, so as the whipped travel in the air it collected energy in the from of are atmosphere atoms of oxygen an nitrogen. But the whip velocity and it material is able to pick up enough atmosphere particles at the beginning of the Shockwave released all those atmospheric particle and a high speed which is what creates the Shockwave it's self , cause you need sometype of substance there to be big enough and fast enough to break the atoms in the atmosphere apart.

[@jhyland87]

3:40 Oh wow, you can actually see the shock wave initiate. You're literally seeing it as it goes from subsonic, to transonic to supersonic, right? That's incredible

[@joshuasalem5022]

We went from Smarter Every Month to Smarter Every Week. In a few years we’ll finally have a literal Smarter Everyday

[@GunFunZS]

Probably not. He puts more prep work into them all the time. If every project takes months of lead time, coordination, and hours of input, he has to fit in family somewhere. If he sacrificed the depth for frequency, I don't think he'd still enjoy what he was making.

[@daftbence]

@@GunFunZS Duh, it was a joke... Unless you went full irony, then it's r/wooosh for me

[@Leviathandk]

Well... He started out with a video every day.. pfft!

[@Ivankonermann]

One of the best ones yet! Amazing work @smartereveryday !

[@juanageitos4923]

just make sure to include the part that almost anything can be used as a whip so the dynamics must work even if the weight and length doesn't decrease further along. So cool!

[@theerikmoore4816]

Like your charging chord, you may be able to apply the "whip effect" to a tape measure being loaded back in by the spring inside it, and the end metal piece whips you sometimes when it gets close to coiling back up.

[@primozimo3041]

Interesting, now how can we apply this to space travel.

[@JackSpasojevich]

Attach a spaceship to the end of a huge whip and get to space without rocket fuel

[@FoXy-gr2hb]

@@JackSpasojevich the only problem is that the spaceship could only weigh a couple of kilograms and you'd already need a massive qhip

[@thatoneguynamedpatrick]

You know those g-force traning things? Make it like that but vertical and can detatch the pod after ~7g's and make sure its pointing upwards

[@Astakos907]

Ever heard of less air the higher you go and it would be impossible whips are to heavy and they don’t generate enough thrust

[@wrlwindd]

Intergalc-whip

[@yatint9665]

I clicked so fast my finger broke the sound barrier.

[@godexists2177]

Lol

[@ramb0997]

I clicked so clicky that I clicked the click barrier

[@saqibmudabbar]

Lol

[@archivepostsexe]

Mood

[@Nawmps]

Ow

[@theRealSteinocher]

After watching sooooomany videos of u......i think u deserve a price...something to honor your work for us. thx man

[@donavanfrea6768]

Everyone in the world should be subscribed to this channel. Never settle with the knowledge you have today. Everyday day you should be striving for more

[@tripp9821]

I got to experience this phenomenon firsthand when I picked my wife up for our first date. She was still drying her hair with a towel and she thought it would be cute to throw the towel at me. So I thought it would be cute to pretend that I was going to “whip” it at her. With a lazy motion I whipped the towel towards her but unfortunately that towel conserved energy perfectly. The crack was so loud that I am pretty sure it broke the sound barrier and left A bruise on her bottom even through her jeans. And with all that we were still married a few years later and have been for over 18 years. 😄

[@Random_Bern]

Growing up, my brothers and I routinely had battles in the kitchen with cotton tea towels (no idea what you'd call them in the States, we used them for drying dishes). The ones with a fringe on the end cracked better, though the cotton weave disintegrated fairly quickly with repeated abuse. You really didn't want to cop a loud one on bare skin, it would raise quite a welt! Great for taking down flies, though... :-D

[@dramaqueen4640]

The kink is strong with u

[@ilovekanye8023]

Bruh that’s very kinky 0-0

[@GoldStarLord]

“I think all this whip business is a reason for you to explore *pause*” Hold up now

[@Hellbender32]

XD

[@javierperez_21]

B R U H

[@boolee2]

I agree that the hypersonic movement is caused by the acceleration of the tip and that the acceleration is caused by conservation of momentum and the decreasing diameter (or, more exactly, mass density) of the whip along its length toward the tip. But I think the acceleration is still high even if the diameter or density is constant along the length of the whip. This is because of the following fact. At any time during whipping, we can devide the whip into two parts the upper part (near the tip) and the lower part (near the hand). The main momentum is generated by only the upper part because the lower part is almost stationary during whipping. Due to the law of conservation of momentum, the upper part has to speed up because the length (and mass) is decreasing during whipping. The rate of relative decrease of mass of upper part is, in fact, accelerating toward the end of the whipping process, which results in accelerating rate of relative increase of the speed.

[@theseusization]

9:02 I love how he put eye protection on for this explanation

[@fergri9997]

This 11:21 minutes flew by as if the video was just 1 minute long

[@jeffvader811]

I know, I didn't want it to end, I hope that they release this research as a paper.

[@JA-kx6kf]

When i read your comment, i said "no way was that 11mins long" then i looked back at the video.. 😳😮

[@lucretius8050]

the video moves faster towards the end like a whip

[@JoshGDS]

Fighter Jets: we can break the sound barrier THE whip: well That's cute

[@laavanayaggarwal6671]

commenting here before this blows up

[@justsomeguywiththesamereco3965]

M32

[@belonn6121]

And people used these as a torture method centuries ago..

[@RIPPERTON]

Hold my high speed camera...

[@incorefoysal]

The funny thing is i saw his f16 fighter jet video breaking the sound barrier and started to search about super sonics

[@jcgharib118]

Dude that's some of the coolest footage.

[@raydelien7947]

I love watching your older stuff and hearing you recommend books that I have already read. We have very similar interests. Skunkworks is one of my favorite books. It is not only an interesting story of the U2 and SR-71, but it is also a master class in project management and overcoming unexpected challenges.

[@thomrob1]

Totally, i read it in grad school 20 years ago. I was MEZMERIZED

[@seanperdue232]

The moment you realized you just watched history being made.

[@mikado_m]

Hm?

[@sanstheskeleton5422]

@@mikado_m think about slavery

[@derrickmeade4891]

@@sanstheskeleton5422 what?

[@sanstheskeleton5422]

@@derrickmeade4891 he/she didn't get the joke/truth so i TRİED to explain it

[@derrickmeade4891]

@@sanstheskeleton5422 I thought she was meaning where the guy said this was the most conclusive test on how a whip cracks and the use of all three tests at once and that was history being made...like the guy said in the video. Nothing to do with slaves

[@VanOfSalt]

When you kinky and scientific at the same time😏

[@thalmoragent9344]

Harry Browneigh 🧐 now hold on for just a minute....

[@ZeroSpawn]

@Harry Browneigh careful, April is awesome, but has a few surprises for you. 🤔🤣

[@_GRiM1]

@@ZeroSpawn she might have A big surprise

[@roadsigncheems1566]

Harry Browneigh hol’ up

[@davidreeding9176]

420th like, it was an honor

[@ZenDoggie]

The joy of your discoveries is MAGICAL! Thank you for sharing your incredible insights and discoveries. We are ALL smarter today.

[@Mike_Engel]

Dustin... I LOVE the way you LOVE science...... I am 60 years old and wish I had you as a teacher I would have loved science a lot more that saying... DUDE WHAT HAVE YOU DONE!!!!

[@Nighthawkinlight]

Well, I learned something

[@udo]

im seeing you everywhere 😂

[@Saffreuge]

Too fascinating seeing most of the sciencey youtubers at once

[@spiddyman0079]

That u have to go to bed now young man.

[@nathonizamboni875]

9:02 **wears goggles in car for dangerous demonstration**

[@smartereveryday]

Goggled is my rested state.

[@OvidiuHretcanu]

I think that was take 2... after take 1 without goggles :D lessons learned :D

[@aaron4820]

Ballistically rated*

[@fsmoura]

well, Cody from Cody'sLab wears gloves to do math . . . you can never be too safe 👍

[@randyharmon280]

... been following You since the Total Solar Eclipse in August of 2017 and just stumbled over this Video. I AM AMAZED !! !! !! (and Miss Choi has another follower too)

[@mrbeans2425]

What a great video as always! you had my sub from the first vid I ever saw!!! She is incredible!

[@bletz421]

My wife pulled a vacuum cord out of a wall just like that whip. It came flying smack dead right on her nose it ended up breaking it and giving her 2 black yes. Now I can tell he it was fluid dynamics that broke her nose. GO SCIENCE!!!!

[@smartereveryday]

IM NOT THE ONLY ONE

[@skeetsmcgrew3282]

Sure. The "vacuum cord" just "accidentally" broke her nose

[@addmoreice]

@@skeetsmcgrew3282 Well, that got dark quickly.

[@bran9380]

f

[@MediocreHexPeddler]

Somehow, I doubt she will be entirely appreciative :D

[@taofledermaus]

That was awesome! A little channel called Peninsula Seniors has a bunch of lectures from quite a few SR-71 pilots with their personal stories of flying the plane. Really good stuff for Blackbird fans.

[@flamby357]

Hi i'm a Taoflederfolks

[@ace0736]

You guys should use the schlieren method for your you build it we shoot it series it could Help with spotting why some rounds are more aerodynamic than others

[@midship_nc]

Thanks jeff!

[@thyssaliki]

Lasfit honda cr-v

[@Alan_Hans__]

I literally just finished watching your most recent video before watching this. Wasn't expecting to see that name in the comments.

[@NotZowi]

This was awesome never thought whips would be so interesting or come up in my recommended lol

[@sergche3718]

Such a beautiful study of such a simple mechanism :)

[@silsonsteve]

Wow, a perfect video, even the plug for Audible was informative and captivating. Love your work, and the fact you seem to enjoy it so much. Keep it up.

[@smartereveryday]

Seriously... read the book. text "smarter" to 500-500.

[@Draugr88]

Skunkworks was a badass read.

[@Agos226]

0:33 really thought he was gonna say “sadism”

[@Zinfiny]

Lmao I thought that too

[@toshirokardevaand2772]

Maybe she should explore that too. Despite not being attracted to girls, I have huge respect for powerful doms like that. Heh.

[@ookie6651]

Lmaoooooo Yo that s&m joke is gold

[@Rondo2ooo]

For me, one of the best experiments you did.

[@KCGmtn]

I love this guy and his findings!!

[@mada1241]

3:07 I love how they both freak out at science at the same time lol

[@felpshehe]

I'm watching this thing develop and grow... It's amazing

[@calebsurvance9325]

I think that this video deserves an update from 2021, to see if they have had any revelations and have a greater understanding, or to redo this in a somehow more advanced environment.

[@samoolred1245]

anyone who asks how i do it ill send them to this video , thank you destin for showing the skill

[@manyakus8919]

You should get National Funding from the Gov't for your research. You are doing so many great things and you are trully making us smarter everyday. Bravo and Thank you!

[@NLTops]

Not true. Destin should rename the channel to Smarter Every Week. :P

[@smartereveryday]

Tried to apply for NSF outreach grant a couple of years ago and was told I'm not elligible because I'm not an institution.

[@deathpony698]

@@smartereveryday When are you going to make the Sandlin Institute of Technology?

[@Obbliteration]

@@smartereveryday Whats the condition to be an institution?

[@rjbell4]

I wonder what it would take to create the Destin Sandlin Institute for Learning?

[@shiodorusohma]

As a whip maker and instructor, this is the coolest video you could have put out! Thank you! One thing we've noticed is that different popper materials and fluff length actually change the tone of the sound - to be sharper or duller. It would be amazing if you were able to explain that using this new model!

[@bhartley1024]

It looked like the shockwave from the knotted tip was much less powerful than the fluff. It still goes supersonic without the fluff, but it's not as loud.

[@yoyoyuan]

Absolutely love the enthusiasm here.

[@delburtphend6016]

Thank you: I think your evaluation is spot on. The momentum of the circular wave will be transferred down the length of the whip. As the wave moves down the tapered whip the wave become lighter and lighter the mass of the wave becomes less and less. To maintain the original momentum the reduced mass must move faster and faster. What if you had a wheel that could maintain its structure; but the wheel could drop some of its mass as it rolled. If the mass is dropped at the bottom of the rolling wheel the dropped mass would not be moving. Sense the dropped mass is not moving its absence from the wheel would not carry away momentum. So the wheel would become lighter and lighter but the momentum would remain the same. Just curious what would happen.

[@oisincollins-childerson7952]

Great video! I recently learned how to crack a whip. The other day it was pretty cold, and I cracked it. My brother and I both saw a little cloud of condensation near where the crack started. The only explanation we can think of is that it was a small vapour cone, like at the nose of a fighter jet. If you plan to do another video about whip dynamics, it would be incredible if you mentioned that, and looked into it a bit more. (I would, but I don't have access to the same sort of setup as you) Thanks!

[@fasfan]

Your child like enthusiasm for the simple things in life is contagious. Lol. I love your videos.

[@GunFunZS]

And he shows that there aren't actually simple things.

[@fasfan]

@@GunFunZS The simple things I was talking about was the toy guns being in synch at the end. But yeah... even on big complicated concepts he's good at breaking it down for idiots like me to get it.

[@Nitrxgen]

I think a lot of us have child-like enthusiasm for the simple things, his video views and subscriber count reflect this fact, but there's not many people that can chase them the way Destin does, not everyone carries a multi-thousand dollar high speed camera everywhere or have plentiful resources of space, equipment and contacts willing to help. Destin is lucky that he's got all of that, plus the education and time and willingness to present and broadcast his work to the whole world that continue to make this possible (even that alone I wouldn't be able to do) so to have someone like Destin do this for us is certainly a special thing indeed.

[@redims8967]

Love the video! Was there a follow up with your conclusions?

[@lookatme7032]

Yo ! This is amazing content.

[@salvadoroars]

I just love how destin also explains how the process of capturing these things pictures work and not just the actual footage. Science within science within science

[@baberam]

Cube root of science or science cubed lol

[@paulzeee]

Destin - can you put together a slow mo capture with some science behind it regarding ping pong? I've been playing regularly in recent months and we have some questions about what is really happening with the ball when doing a specific stroke called "looping." We think the ball is spinning on the surface of the paddle during this but its hard to imagine. Overall any slow-mo of the ball hitting the racquet would be super interesting to see. The speeds you can generate with a 2.7gram ball is something else. Sincerely, long time fan

[@inthefade]

I would love to see that too.

[@andymcl92]

I could be wrong, but I suspect some of what's happening is similar to dropping a bouncy-ball with a bit of spin. If you try that, you'll see the ball bounces back and forth, and that the spin changes on each bounce. As the ball reaches the floor, the rubber grips the floor and so stays where it is (the boundary condition mentioned at the start of the video but with air). However, the ball still wants to rotate so a torque is applied that twists the ball. This twist is essentially elastic energy which releases, causing the ball to spin in the opposite direction. My suspicion is that a similar thing is happening in table tennis, but that the deformation is to the rubber on the paddle. As the bat moves across the path of the ball, some of the rubber gets dragged back and stretched out. This energy is then released into the ball, causing it to spin. Another thing it's similar to is the hockey shots in some of Destin's other videos, where the stick hits the ice before the puck and gets deformed, before unbending and slinging the puck across the ice.

[@paulzeee]

andymcl92 for sure. Seeing it would be interesting. There is a lot happening with spin received and spin given off the loop, and the relationship between the paddle angle and the moment of contact, and it’s relation to its trajectory off the table. To react in time to make a successful return has a lot going on

[@andymcl92]

@@paulzeee And yet it's one of those skills that we develop an intuition for without a deep understanding of the physics involved! But as I always tell people, it's all in your feet!

[@Feverdream7777]

@3:03 ... omg..... amazing... there is a retrograde tension that changes the tip's direction..... this reminds me of a Professional Golfer's swing... In the Golf Swing, there seems to be a retrograde tension vector directed toward the left shoulder joint around the moment of impact that changes the direction of the furthest most tip of the club (moment arm) which causes a massive acceleration of the club head at just the right moment..... this is awesome....

[@chillybacha8007]

Love this channel!

[@SthamerAMVs]

This is insane. Please do an update video for us to let us know how this turns out!

[@liebesleid]

No, he means the strange pull the tip experiences I think