How fast is a Fidget Spinner?

[@grandayy]

Nowhere is safe

[@abiramn9983]

Whoa two of my favourite channels in one place

[@MuzikBike]

So the Lord himself appears.

[@Sixsince-dd2eu]

grandayy Our meme lord and savior

[@toastysauze]

tfw a popular KZbinr appears in such an obscure place, barely anyone notices him

[@lilbasmati]

daddy

[@error.418]

I love the whole Parker Square phenomenon. You've reminded us how important it is to fail to reach success. You've given people more comfort with and sort of permission to fail. This is incredibly important. Without failure, we learn very little.

[@Maninawig]

And now it is absolutely official as "a failure on the small scale that, when looked in the big scale, becomes the sought rarity"

[@theCodyReeder]

Thank you

[@standupmaths]

+Cody'sLab You are very welcome.

[@TheOfficialCzex]

I am astounded by the lack of replies to this comment.

[@alfredcognoet]

@@TheOfficialCzex same

[@raphablitz]

That was parker gyroscopic precession at the end there.

[@alexanderkonczal3908]

RaphaDoggyG came to the comments to make sure someone had said this

[@Caye2013]

RaphaDoggyG best comment ever

[@standupmaths]

+Alexander Konczal ಠ_ಠ

[@EPgeek]

Parker square material, IMO.

[@drakethorn1339]

Classic Parker Square honestly

[@semitangent]

"people who don't understand real units" - writes "k/hr" instead of "km/h" :D

[@lare290]

1000/hour? Woah.

[@LechuvPL]

What about Hz/D ?

[@pauloat]

also don't using ISO mt/s smh.

[@karlmuster263]

so that the viewer doesn't misinterpret it as "kilometers per Plank constant (energy*time)"

[@ryanmuller9497]

Given that "kays per hour" is a reasonably common idiomatic way of referring to kilometres per hour, at least in Australia (where Matt is from; I'm not sure whether it's as common elsewhere), I suspect that's why he ended up using that notation.

[@pcross84]

Math never interested me in school and I never caught on. I'm 33 years-old now, and I never thought that math could be so interesting. It's like one giant puzzle. Thanks for making it interesting! Regards from Dallas, Texas!

[@Lily-zy6uk]

*Goes straight for the trending clicks*

[@mb98765]

i clicked instantly

[@Lily-zy6uk]

ditto tbh

[@Lily-zy6uk]

there are few things in the world that get me more excited than new Matt Parker content

[@mb98765]

Jake Edge like what

[@johnielus8682]

Getting a life

[@andersonkurk]

"I'm never gonna do that . . . again." -Matt Parker 2017

[@YourFriendtheGeek]

He reminds me of John Cleese with his vocal mannerisms and pauses :D

[@PP-bs3od]

The fact that it's cut off at the last second makes it all the better.

[@ryonotrio6904]

"people who don't understand real units"--> Ohhhhhhhhhhhh

[@ToMeK3001pro]

Trouble cuber perfect

[@ryonotrio6904]

Roasted!!

[@TimoKanal]

Got 'em.

[@ryonotrio6904]

time to change to the real units people!!

[@micayahritchie7158]

Timo his point

[@polygonc]

Brilliant fun - especially the precession experiment at the end, Matt. And I wasn't too troubled by the debate over the units you used.

[@Sam_on_YouTube]

I'll say it, the video ended with a Parker Procession. AKA "sort of".

[@djsmeguk]

"spectral analysers, your gateway drug to full blown fourier analysis"

[@IceMetalPunk]

Oh, hey, it's cpw here on a Standup Maths video! *Waves from the Minecraft community*

[@MuzikBike]

Well then

[@sebastianlindberg6767]

THANK YOU, i hate those videos where they say it's going 1.000 mph and thank you for saying that the metric system is better.

[@standupmaths]

+Sebastian Lindberg You're welcome and you're welcome. All the videos claiming insane speeds were annoying me. But I didn't feel like doing a direct take-down video of someone else's work. So I made this video quite general.

[@LoLrand0mness]

yeah, i felt the same way. but i find it awesome that so many people are wondering/thinking about gyroscopes because of this new trendy one called "fidget spinner" :D (i actually build a gyroscope to test around with, that is pretty similar to the fidget spinner... got some used ball bearings from a skate-shop for free and 3 month later i've heard the first time about fidget spinners x_X) now i want to add some electric-magnets that change polarization depending on their relative position to the center :D

[@rdizzy1]

You can definitely get them going far faster than this, due to the fact that there are many different materials and designs they can be made out of that are much stronger than plastic. Such as the solid heavier ones made of one piece of metal with ceramic bearings and such.

[@chrusplays8161]

Sebastian Lindberg metric system for speed is horrible.

[@angelmendez-rivera351]

ChrusPlays Not at all.

[@DanielQRT]

I want fidget/second to be a SI unit.

[@yondaime500]

how many smoots is one fidget?

[@TPGFan]

yondaime500 42

[@MrtinVarela]

If you search long enough you'll eventually find a imperial unit for that.

[@PeterJavi]

Repeatears Repeatears If only the French can change those units, why isn't there a unit for Baguettes per Omellete du fromage yet?

[@sirmossy6481]

Fiskrood Well then just call it a fidget and define it as one fidget spinner rotation per second.

[@katowo6521]

you know shit's real when a mathmatician plays with a fidget spinner

[@whitherwhence]

I would like to thank you for those first 20 seconds. You are - with no exaggeration - the only person I've seen sharing my view on these things.

[@MathManMcGreal]

I'll show this to my honors geo students this summer when we get to circles!

[@karlmuster263]

I like how it flipped over at the end and started precessing the other way.

[@jakemartin7041]

It's now trendy to make comments about trendy topics being trendy. Now anyone who judges this video for being trendy is a hypocrite. Have a nice day, I love you all. Especially you, Matt :)

[@standupmaths]

+Jake Martin I love you too Jake.

[@toastysauze]

"I love you, too, Jake."*

[@ScriptGuider]

There's no extra comma required before "too," you're really overreaching there. You wouldn't have Jake say "Especially, you, Matt." While neither instances are considered incorrect, throwing extra commas in your sentence just clutters it up, and makes it more difficult to read and vocalize coherently. Only the comma after "too" is necessary. Long story short, if you're going to be that much of a stickler for grammar, don't add your own rules. Especially not when it makes zero difference grammatically, and a negative difference coherently.

[@toastysauze]

I saw it as like you have to put comma before "too", and comma before the name of whom you are referring to. I'm foreign, though, so I could easily be wrong here

[@Jethercake9]

That Parker gyroscope at the end xD

[@bengineer8]

"Parkroscope"

[@giovannitrotta2652]

The perfect video doesn't exi-

[@UMosNyu]

This is your square for tonight. But gentle to it.

[@Chris-Workshop]

just a side note: these cans are not precompressed air. usually they are a butan / propane mix or even R134a refrigerant (inflamable). and it liquifies under a few atmospheres of pressure so you can store a order of magnitude more than if it were just compressed air. plus it somewhat keeps the pressure constant, depending on how quickly you deplete it, since going from liquid state to gasious, it looses a lot of heat.

[@muhammadmoazzam4817]

ive calculated the decelarion rate of the spinner to be 0.2585 rev/second squared

[@standupmaths]

+The AtomicToaster Did you work that out from the slope of the signal on the plot?

[@muhammadmoazzam4817]

standupmaths no this was weeks ago im not that sophisticated Just got some spinning footage and and counted the number of spins per sec at different times, then calculated the rate at which it slowed down after 6 values, I took the average and got this. don't know how accurate this is tho

[@christopherrichey7237]

Either way, I applaud your efforts

[@ball1st1cpengu1n9]

is the rate of deceleration not proportional to the speed that it's travelling at originally (as resistive forces are roughly proportional to square of the speed) in which case the value would be quite different if you used a different spinner most probably at a different speed??

[@MD-pg1fh]

Careful with that footage, though. If it generates sound at 180Hz, you have to take footage above 360Hz to be aliasing-free. Actually, you know what, deceleration rate *can* work even in the aliased measurement (if it doesn't decelerate too fast). Just don't try to measure how fast it spins with a regular camera.

[@chaoskuddel1940]

Thats The reason why this is my absolute favorite math channel. Trendy, but making a little Bit of fun out of it at the same Time. great Video !

[@dalitas]

remember kids: don't do fidget spinners... it leads to fourier transforms!

[@Pelnied]

That's funny, I made a fidget spinner with 4 magnets of alternating polarity and got it to induce a small voltage into an inductor coil while it was spinning. Then a standard oscilloscope was used to measure the "mic level" AC voltage's frequency to determine the frequency of the fidget spinner. I used 2 sets of alternating magnets (quad spinner instead of tri spinner), so for every revolution of the spinner you would get 2 full AC cycles of (+) (-) (+) (-). It was also neat to see that some of my inductors produced pure sinusoids. Other inductors could start resonating to produce harmonic waveforms depending mostly on the orientation in relation to the spinner. I want to get a photo tachometer so then I can have that second verification, but the setup is fun and educational nonetheless. I'm glad you mentioned that it is a great way to introduce people into Fourier Analysis and the sinusoidal components in a signal! Absolutely loved the gyroscopic precession attempt at the end too!

[@harry_page]

4:43 Wow, the contempt in your voice for tau supporters xD

[@joshuarosen6242]

Contempt I wholeheartedly share. Matt isn't going to stand for any of this tau nonsense and neither should we.

[@joshuarosen6242]

@@Peter_1986 None of that matters though. We already have pi. Alea iacta est. Tau has missed the boat. Bye bye, tau.

[@LeutnantJoker]

@@joshuarosen6242 It's made it into programming languages soooo, I'd call that a win since I'm going to use it now in my code instead of a stupid TwoPi constant I always have to define otherwise... so.. bye bye PI

[@23PowerL]

Screw expensive lab equipment, I have an app. Marvelous times these are.

[@standupmaths]

+23PowerL I know! We all have an oscilloscope with us at all times!

[@tobymoszer]

now how fast do you have to spin it so that it is nearly impossible to twist because of the gyroscopic effects?

[@andymcl92]

I bought one because I want to make a video on the physics of them as gyroscopes. (Not made it yet, but it IS possible to get an alright amount of precession without compressed air!)

[@standupmaths]

+Toby Moszer Much faster than I did.

[@standupmaths]

+andymcl92 It does work. I should have supported it from the centre of mass to see the precession.

and how fast so it explodes?

[@YourMJK]

standupmaths Yeah, sticking the pen through the bearing in the center would have been much easier and more effective ;)

[@lesnek8662]

I just love this little disses like "real units" or "freedom paper".

[@seanm7445]

It’s my personal philosophy that a pint glass can solve any problem.

[@jelmerl1458]

We just started with fourier analysis and measuring audio spectra in liquids. This is so topical and it's very elegant maths.

[@keekle1892]

I think Matt is the only person whom I don't mind having a fidget spinner :D

[@MushroomManToad]

I love it! Parker buys a fidget spinner and is immediately doing physics and maths with it! I like a guy who has the means to and therefore does push whatever he gets to its very limits!

[@kodikuu]

Scott Manley did the maths on this iirc

[@standupmaths]

+Callum Watson Yes, some great working out on the max speed which would break one.

[@Baiko]

And Hydraulic Press Channel / Beyond the Press actually broke a bunch of them with speed.

[@deamon6681]

+standupmaths Wouldn't that highly depend on which material a particular Spinner is made out of?

[@daanwilmer]

As Scott Manley calculated, and Anni and Lauri Vuohensilta (the Hydraulic Press People) tested, a regular fidget spinner can go up to around 20000 rpm before disintegration, so you could have gone a lot faster. But hey, you gave it a go, and the Fourier analysis added a nice touch. Also for us home mathematics enthousiasts without high speed camera (or hydraulic press).

[@richardtowers6948]

This is what happens when mathematicians bumble around on engineering turf. Clearly when you have a system dominated by air resistance and friction and you bothered to bring 2 air streams to the table, if you're a mathematician, you then go and find yourself an engineer to finish the job. The engineer will immediately explain that, by locating the air cans on opposite sides, you will at once balance the load on the bearings to minimise friction and remove a large zone of air resistance from the test rig, thus allowing it to spin perhaps up to twice as fast at the same effort. If you ask nicely the engineer may show you how to achieve speeds of 20,000rpm+ You may want to bring a chemist in to tell you what's really in that can as well ;-)

[@lemao_squash4486]

Richard Towers oh wow so engineers are supermen who know everything, nice (and no shit, that was obvious as hell and he just didnt want to block the view). Also you cant spin a fidget spinner that fast... Watch scotr Manley's and beyond the presses video

[@Madmushroom64]

Richard Towers It has been 6 months. Just checking in to see if you're still a conceited jack wagon. Genuinely curious.

[@thief9001]

The gyroscopic precession bit at the end was nice. That's one of my favourite things in science and math, and every time I see it, it really freaks me out. It just goes against my intuition so much that it seems like magic!

[@holovoid7943]

2pi Parker? That is an equation waiting to be simplified

[@umnikos]

tau?

[@tomhassel7629]

Base 12?

[@MrCmon113]

Mattkew An expression, not equation.

[@Joanyan]

Mattkew tau

[@dramawind]

That's re-tau-rded

[@mountur]

"People who don't understabd real units" I love you Matt

[@blackpenredpen]

@5:10

[@cubicardi8011]

blackpenredpen heyyyy, you here? Niceeeeee

[@cowlikenuts]

HEY

[@TauGeneration]

Image something going that fast to your head

[@Sammie_Sorrelly]

You should definitely check out Scott Manley's video on a similar topic if you haven't seen it already - his was about calculating how fast it can go before being destroyed by its own inertia, which has its own charm.

[@standupmaths]

+M Laurence I have! It's some really nice working out.

[@tomcrisp261]

oh no they got to maths

[@standupmaths]

+Tom Crisp Or did maths get to them‽

[@jonathanowo7584]

standupmaths EYYYYYYY

[@RCSDominoToppling]

I am deeply delighted to see that you are a fan of the interrobang. This punctuation mark demands a larger following!

[@rewrose2838]

+RCSDominoToppling How do type that?

[@PuffyRainbowCloud]

Oh no, mathematics can be applied to a toy/tool which heavily relies on physics...

[@pyramear5414]

The whole vibration analysis method to get spin speed is something I do in aircraft engine health analysis all the time. Although in that case we know the speed it is spinning from a rotary encoder. By knowing the speed that a shaft is spinning, you can predict what its vibration profile should be, and any deviations from this predicted vibration profile are defects. What gets really fun is when you have a gearbox with many rotating parts in it. You can see the frequency that the teeth are contacting for each gear.

[@StefanRau]

You could have also used Tau instead of 2*Pi

[@paulneal9908]

Stefan Rau tau is 2pi, they are the same, he used tau as much as he used 2pi

[@bonniedean9495]

Paul Neal He wrote 2pi, i think stefan means that he could have writen tau instead

[@norikitsune]

Stefan Rau Matt is a pi enthusiast lul

[@iThing89]

He could also have written 4Pi/2, but what would the point of that be?

[@standupmaths]

+Stefan Rau ಠ_ಠ

[@isaamalhabash1291]

I saw your videos from numberphile. You're very charismatic and I love your videos. I'm so glad I found your channel. all the best.

[@22NightWing]

No! Matt! NOT YOU, TOO!!! THE WORLD IS DOOMED!

[@standupmaths]

+22NightWing There is nothing which cannot benefit from some maths!

[@zeltau]

standupmaths at least there is math involved for extra taste.

[@MrMomoro123]

I've been waiting for one of the big science/maths channels to make a video about fidget spinners. The only thing interesting about them (besides for using one to keep my hands occupied) IMO is the physics of it.

[@كابوريه]

22NightWing it's science, not bullsh*t.

[@hiveinsider9122]

Scott Manley did a video on how fast it would need to go for the plastic to fail. It was at that point that I realised that if you add maths to it, even the worst of things can become the best of things.

[@lowercaserho]

"A gateway activity to Fourier analysis" is possibly my new favourite phrase of all time.

[@dbackscott]

That conversion at the end from cm/sec to m/sec seemed a bit complex. Did it involve the use of any reference barley corns?

[@standupmaths]

+Scott DiMiceli I do remember multiplying by chains.

[@profblindserv]

Scott DiMiceli 🤓🤓

[@AMotoVlogger]

Absolutely fascinating experiment, bravo sir!

[@toniburon3162]

That did not make me upstet, and that is challenging just by reading the title... Amazing :D

[@standupmaths]

+Toni Burón Thanks for pushing through the title and watching the video. :]

[@toniburon3162]

OMG You answered!

[@micayahritchie7158]

Toni Burón the world will never be the same again

[@jttao8510]

I thought my computer was broken when the buffering logo was a fidget spinner. I don't know how you did it but good job.

[@annaisabanana6848]

"Maths is pointless" urm try again

[@_Onlime]

AnnaIsABanana But the spinner is round, not pointy

[@robertr7923]

AnnaIsABanana this maths is not useful because fidget spinners suck

[@asthmen]

Maths has loads of points. Segments and planes, too.

[@MuzikBike]

Ever heard of the 120-cell? That thing has 600 points

[@petrichor2889]

Maths is pointless because, ultimately, we are the last remaining species of our all but extinct genus - desperately clinging to the surface of a tiny puddle as it hurtles through a minuscule portion of space in multiple directions. Our existence on this puddle has been a blip on the radar of life, let alone the planet, let alone the universe, and our existence will be over in the relative blink of an eye. All of our creations and discoveries and knowledge will erode and be forgotten and nothing that we have ever done - including our understanding of maths - will ever matter. The universe does not require maths to operate. It may follow mathematical principles, but the maths is descriptive of the universe, rather than the universe being an end product of maths - a circle doesn't need maths in order to be a circle. Maths only exists for as long as we do and it only serves purposes that we require. In the absence of a God, nothing that we do has any meaningful purpose and in consideration of our species' fleeting existence and our place in the universe, nothing that we do has ever even happened, therefore maths is, like all else, pointless. I win.

[@adityapanchal4888]

The last KZbin channel I would expect to play with fidget spinner

[@ON7BS]

I guess you have to divide by 6 instead of 3 because every lob exists of a hole... so the air bounce of at the beginning of the hole and on the end of the hole... If you understand what I mean... but this is only my humble opninion.... i guess it is better to use a stroboscope to determine the speed...

[@tomadams7553]

Ben Deschacht I don't think that the air would really hit the inside of the loop enough to register.

[@standupmaths]

+Ben Deschacht Yes, a stroboscope would have been better. Or there are some nice methods with lasers. I wanted something that anyone could try. From what I could tell, the edges of the same arm do not make distinct noises.

[@ON7BS]

hmmm... i shall experiment away tonight... thanks.. now I know what to do this weekend... :D

[@timharig]

standupmaths You can get apps to strobe your phone's flash LED.

[@DavidKennyNZL]

Thanks. Downloading one now.

[@Jreaming1212]

sometimes i look at the channel name and read it as "stupidmaths" and i doubt myself but the title always reassures me.

[@kalebbruwer]

Please remind me why we all hate this thing. At least kids are now aware of the gyroscopic effect.

[@standupmaths]

+Kaleb Bruwer Everyone loves to hate the things kids become obsessed with. Because obsessed kids are annoying. But this fad does have some genuinely interesting maths and physics! Kids are playing with the gyroscopic effect!

[@Matth3w23]

Kaleb Bruwer Personally I hate the fact that they are being sold for something they don't do, and also how people (especially in primary schools) are being judged for not having one.

[@MuzikBike]

...and in secondary school, kids are judged for yes having one. At least there's a decent amount of education behind it, even if people are losing their minds and probably souls just because of their existence.

[@notottomedic]

TAKING JABS AT THE IMPERIAL SYSYEM GOOD JOB MATT

[@VikingerOnYT]

What camera stand did you use for your phone? Looks great! :o

[@bethmia]

Hi, just wanted to say that I saw the maths inspirations talk today (5th July), and you are a hilarious man! Thank you for making me more interested in maths

[@brechtlauwers02]

The loader is a fidget spinner... omg

[@RandomNullpointer]

Yeah, KZbin is crazy!

[@Asher.Yodaah]

Literally the best fidget spinner video I have seen.

[@andrewkovnat]

Is it odd that I did the exact same thing as Matt to find out how fast they spin?

[@x202e3]

This is the only video i would ever watch about fidget spinners.

[@earfolds]

Oh no.

[@FlyingJetpack1]

I think that from the millions of fidget spinners videos you are the first to finally call them gyroscopes. It's truly the most exciting thing about those toys.

[@standupmaths]

+FlyingJetpack1 I know! I was amazed so many young people were obsessed with gyroscopes.

[@FlyingJetpack1]

I've been playing around with the spinner, getting the feeling of how it resists movement and where the spinner goes if i let it tip freely when i twist it. On paper its really hard to understand the gyroscope's properties, but when you have a miniature one in your hand it's far more natural to just test it and get a physical grasp of the forces at play. Who can say no to a cheap gyroscope?

[@andrewkovnat]

Oh no. Not Matt too...

[@AndersQvist]

watched this and realised I smiled ear to ear :-) I really enjoy your videos, keep up the good work!

[@Yoshiiro]

5:10 "don't worry people who don't understand real units" Best Troll Ever :D

[@L4Vo5]

Probably the only fidget spinner video I'll ever watch

[@adelarscheidt]

Isn't the spectrogram logarithmic? 3/4 wouldn't be 187.5 Hz

[@standupmaths]

+Adelar Scheidt Good point! But I had set it to a linear scale to make the reading easier to take.

[@moatl6945]

I would recommend to display the spectrum with logarithmic scaling of the frequency axis.

[@TOMENTIS]

No, God! No, God please no. NO! NOOOOOOOOOOOOOO

[@standupmaths]

+Mints I've measured your comment at 3 Os per second.

[@joschaugustenborgnielsen2366]

Lol :D

[@hhhapz]

or 10,800 o's per hour.

[@Michael-vs1mw]

That gyroscope thing was a real Parkerscope :D Great vid, man!

[@911gpd]

2 trolls in one video, nice job ;) Metric vs. Imperial units + 2Pi vs. Tau

[@angelmendez-rivera351]

Metric vs imperial units is not even a troll, because everyone knows metric units are objectively superior. The SI has its metrological shortcomings, in particular with regards to physical quantities that are currently considered dimensionless, but it is a system that is otherwise superior to imperial units in every single aspect. Imperial units can hardly even be called a system, anyway.

[@whiteflagstoo]

Matt, always asking the important questions of our time.

[@BrendanxP]

This video has a length of LO:L

[@suwinkhamchaiwong8382]

Brendan Dijkstra Upside down

[@jontelling]

I have another way that I came across while watching one spin. Under LED lighting you can see the "frame rate" of the spinner. If you spin it up and allow it to slow and count how many times the "frame" stops until the spinner fully stops you can work out the RPM etc if you know the Hz of the LED. :D

[@Laurabeck329]

The clicks have been bated.

[@standupmaths]

+Mihovil Beck I'm luring them in.

[@hariseldon3786]

you just sprayed all over a fidget... and I could poke holes in the experiment - but I don't care bc the big picture is that what you do is EXCELLENT...

[@addisonalbert9078]

Really dude, fidget spinners

[@kcwidman]

I like your avatar picture. :)

[@JimmyLundberg]

Small world, eh.

[@AndrewTJackson]

Jimmy Lundberg Don't you mean flat world? ;-)

[@kressckerl]

I love your support of the metric system

[@edmn]

Tl;dw. Quite fast.

[@GuyWithAnAmazingHat]

Never thought that I'd get fidget spinners in my recommendations because of Matt.

[@standupmaths]

+GuyWithAnAmazingHat I am a combination of sorry and proud.

[@chavidealmeida4073]

Louder than a fucking Tesla

[@chavidealmeida4073]

.

[@ladyemrys8913]

Finally, somebody found the proper use of a fidget spinner.

[@ivanvojvodic8350]

I give up on humanity

[@Threedog1963]

Well, you are watching youtube. What do you expect?

[@LetsPlayCrazy]

"And don't worry, all of you who don't understand REAL units, its 35.1 m/hp. You sir, have earned my thumbs up :D

[@willsparrow7870]

No, please no, WHY!

[@viveksoley]

The compressed air grinder is another high rpm device. I have seen hand held grinders with 20000 rpm speeds. Although the diameter of the tool is small, (30-40 mm) , it too makes a whistle like sounds when rotating

[@dreamscapeai7]

Guess who? Read more

[@TheOtherDeimos747]

cant fool me when i'm using german for my system language

[@dreamscapeai7]

companion robot woah I didn't consider that.

[@KaityKat117]

the "read more" is grey when it's real. nice try tho.

[@groszak1]

can't fool me when I see both read more and show less

[@SuperStingray]

Oh shit, it's Reid Moore!

[@jakjarsha1107]

BUT! As the pressurized can decompresses it loses heat energy, the remaining air molecules are cooled and the flow of air slows. So really you are measuring how fast a can of computer duster can set a fidget spinner spinning before the can cools down. Alternating cans was a good idea, but a much more accurate extreme could be measured with an air compressor. Great video!

[@ryonotrio6904]

No! The curse is here

[@AndrewBlundon]

I did the exact same experiment 2 weeks ago for my kids. A great use of a spectrum analyzer.

[@standupmaths]

+Andrew Blundon Alright! Did it work?

[@AndrewBlundon]

Absolutely... I started off showing them the spectrum analyzer and getting them to whistle which showed the frequency of the whistle. I then used the spinner and was getting around 30 revolutions per second by spinning by hand... (using a slightly different unit). It was neat to show the kids that as it slowed down the frequency dropped.

[@YaStasDavydov]

Every day. We stray further from god.

[@Threedog1963]

What's your point?

[@cloud__zero]

god you mixed math and humour, I love that! "two… *pi* " "don't worry people who don't understand real units" (shows mph conversion)

[@acorn1014]

Maths is not for memes!

[@steliostoulis1875]

Andrew Chambers lol -1/12 disagrees with you

[@MrtinVarela]

That's a parker square of a statement.

[@axities]

Had no idea you could find out the speed of an object by its frequency, thanks for another video man.

[@SteelKatanas]

Why do you jump at any movement? What a wuss lmao.

[@garrettkajmowicz]

"Gateway to Fourier Analysis" - thanks for that one!