"It looks like advice you'd give to your teenage daughter before a night out." Do not drink Do not inhale Avoid eye contact Avoid skin contact This is perfection
@runs_through_the_forest
3 жыл бұрын
she looks sufficiently sexy and hightech, it's the only thing you can say to her dad to be allowed taking her on a date...
@theshuman100
3 жыл бұрын
"Dont let me catch you two inhaling each other"
@darioinfini
3 жыл бұрын
"Pretend boys are Hydrofluoric Acid"
@Obsidian0Knight
3 жыл бұрын
Gotta love that humor! =)
@snoopah3077
2 жыл бұрын
Just because of that it made msubscribe
@ImpactWench
3 жыл бұрын
"And do they work as Tesla valves? Sure, in my opinion these look sufficiently sexy and high-tech." Shade thrown.
@EvanOfTheDarkness
3 жыл бұрын
Yeah, especially that in this case, they didn't work at all, because the liquid was pulled by capillary action, and not pushed by pressure difference (which is what the valve was designed for). They would probably start working, *after* the channel is full of liquid and pressure takes over as the main force.
@NormanBateson
3 жыл бұрын
What's the formula for the acid in that sentence?
@Bubu567
2 жыл бұрын
@@EvanOfTheDarkness The point is to simply favor one direction over the other. Then it can do work as a valve. How effectively is the question. Usually not very effective at all.
@EvanOfTheDarkness
2 жыл бұрын
@@Bubu567 My point was, that only happens after the whole valve is "wet", what you see in the video is simply the capillary action *pulling* though the liquid very fast. (Which happens at the same speed in both directions)
@MordecaiV
2 жыл бұрын
@@EvanOfTheDarkness in one sense it is a pressure-based action, but it is also largely due to the momentum in the fluid. Tesla valves must leak in order to function.
@thethoughtemporium
3 жыл бұрын
Well. Challenge accepted I guess.
@marksmod
3 жыл бұрын
yeee buddy
@geekoutnerd7882
3 жыл бұрын
Can’t wait!
@FloridaGlowstickers
3 жыл бұрын
awesome ill grab the popcorn
@Richard-Freeman
3 жыл бұрын
This is hillarious. I can only imagine watching a video and out of nowhere hearing your own voice.
@bielanski2493
3 жыл бұрын
"I'm using helium as my microfluid because everything else is too big and I'm not playing with free hydrogen."
@fzigunov
3 жыл бұрын
The Thought Emporium: "I made the world's smallest Tesla valve!" Huygens Optics: *Hold my HF*
@themonkeyspaw7359
3 жыл бұрын
Hold my ouch juice
@elijahaitaok8624
2 жыл бұрын
@@themonkeyspaw7359 to me ouch juice is red or white wine in a four litre bag all to myself
@MrCh0o
2 жыл бұрын
"gl HF"
@icourant
2 жыл бұрын
That valve would not work. You have made paths in the opposite directions. If you used it like that, you would restrict 50% ether way.
@buckstarchaser2376
2 жыл бұрын
@@icourant By putting multiple sets of bi-directional pairs in parallol , he attempted to preclude senseless naysayers that would never repeat the experiment in their lives, yet go to their graves without understanding what they saw. In this experiment, it was shown that capillary action does not care about your tesla valve orientation, which is the sexiest, and highest-tech outcome possible. Various people will never recover from this/cope&seethe/Tesla=BTFO forever/Dom:"You never had a valve"/etc..
@robmckennie4203
3 жыл бұрын
I think a key piece of safety advice for HF is if you're getting your safety information from youtube, do not use HF
@HuygensOptics
3 жыл бұрын
That is indeed missing in the video. But this advice is covered in the first few lines of the video description.
@tiberiu_nicolae
3 жыл бұрын
@@joenicotera2991 for gods sake please go back to your safe space
@ARVash
3 жыл бұрын
@@HuygensOptics most the people who are here have heard the horror stories second hand I suspect. You did have the proper ruined hand images as well. The bit I didn't know is that you won't necessarily even feel it.
@chemistryinstruments7156
3 жыл бұрын
Must have a fume hood
@etienne1455
3 жыл бұрын
Don’t ever use HF until you were specifically trained for it in a physical training. It’s like skydiving, you shouldn’t do it from KZitem lessons. A lot of safety rules with HF are missing here (especially the things you need to have and do in case of exposure)
@robairey7819
3 жыл бұрын
I’ve used HF a lot in the past and this is one of the best tutorials I’ve come across. Totally agree with your comment on the hazard that the supplier is potentially exposing their delivery staff to.
@jannejohansson3383
3 жыл бұрын
I think delivery guy dosent broke twice those HF boxes.. :/
@mmercier0921
2 жыл бұрын
I used to buy the stuff. Work with it occasionally. Sandblasting can deliver identical results. It is more dangerous than almost anything... even cyanides. You do not realize you have been exposed until it is too late. At least the cyanides give you time to hit the isobutal nitrate before you hit the floor. It can be mixed to make nice product for various purpose. If you do not know exactly what you are doing... do not use this stuff. Do not leave it around. Do not store it in glass. It can deliver some fabulous things, and some horrible things. It is dangerous as all heaven and hell.
@jamesrosenberg1612
2 жыл бұрын
that blew me away, ive handled chemical orders, and they usually are at least sealed bags around the bottles and some padding.
@kevinmalec4977
3 жыл бұрын
I had a good laugh at the "do they work as tesla valves?" .. "sure, these look sufficiently sexy and high tech"
@GodlikeIridium
3 жыл бұрын
But he didn't show them with flow in the other, restricting way^^
@uptide1214
3 жыл бұрын
@@GodlikeIridium there are valves going in both directions. pause it on the frame by frame at take a peek
@jonatan01i
2 жыл бұрын
@@uptide1214 right, they seem to not work
@theGraphicAutist
2 жыл бұрын
@@GodlikeIridium thank you. so patronizing and his prob didn't even work otherwise he'd have shown it... unless he doesn't even know anythuing about tesla valves...
@SnowblindOtter
2 жыл бұрын
Not gonna lie, man, if _I_ had called a chemical supply company to tell them my hydroflouric acid was packaged poorly and they blew me off like that, I'd send the photos to the relevant regulatory agency. As well as every postal carrier in the country.
@piotrnod6489
2 жыл бұрын
yup.
@Encysted
3 жыл бұрын
I really, really appreciate the safety talk, and your awareness of the driver's safety.
@squelchstuff
3 жыл бұрын
Fascinating content once more. Thank you. This time we diversify and not only cover optics, but Tesla valves and life advice for teenage daughters.
@vanderkarl3927
3 жыл бұрын
"Avoid eye contact" I hate when I catch stolen glances from my hydrofluoric acid. So awkward.
@noosebrother
3 жыл бұрын
imagine being a courier and having a leaky box, getting it on your fingers and sniffing it. "ey john dis stuff is well rank, smell it " *offers drenched fingers to colleague*
@MrArcher0
2 жыл бұрын
Smells like rotten eggs. I work in a oil refinery and this is often a by product from the refinery process.
@awmperry
2 жыл бұрын
Having worked in shipping security with dangerous goods, I agree with you - that packaging was horrific.
@GhVost
3 жыл бұрын
What a gorgeous video, thank you so much! Regarding the tesla valve, they do not have any sense for microfluidic application. Due the very low Reynold's number of such flow, the only forces that matter here are the viscous ones (including wetting). On the other hand, the inertial forces (the only reason why tesla valve works) can be simply neglected.
@Keechization
3 жыл бұрын
that's what it looks like in his demonstration, the reversed valves flowed basically the same as the forward valves.
@michaelnyffeler9966
3 жыл бұрын
Wouldn't the liquid slowly move due to the brownian motion in combination with this micro tesla valve?
@GhVost
3 жыл бұрын
@@michaelnyffeler9966yes, right. The liquid will flow if you build a pressure difference at the ends of the capilar. But the action of the valve is based on the inertial motion of the liquid. At such scale most fuids (including gasses) have nearly no inertial forces compared with viscous ones. Thus the action of such tiny valve will be negligible.
@EvilizedDead_EVL_DED
3 жыл бұрын
Your video just blew my mind when you showed how perfectly beveled edges you can get because of the isotropic nature.
@BreakingTaps
3 жыл бұрын
Great stuff as always! 4:36 oh wow though, that was shocking to see. Yikes! Regarding femtosecond lasers... I've been lusting after them for ages for exactly this purpose. But it's not really something you can find on the surplus market very easily. :( Maybe some day! "Do they work as Tesla valves? Sure, in my opinion these look sufficiently sexy" hahaha, I literally laughed out loud. Great video!
@YodaWhat
2 жыл бұрын
> Regarding femtosecond lasers... Build your own. But they have incredible dangers, because putting a mere 1/100th of one Joule into 10 femtoseconds means a peak power around TEN TRILLION WATTS. Any living tissue exposed to such power levels is prone to gross and subtle damage. Makes hydrofluoric acid seem like tea with grandma. Metal surfaces will flash into plasma. But of course, similar damage is why it helps with certain difficult things.
@olivialambert4124
2 жыл бұрын
"Do they work as tesla valves? Sure they look sufficiently sexy and high tech" and "It looks like advice you'd give to your teenage daughter before a night out". I really like your sense of humour, the dry straight delivery really works well here. I genuinely laughed out loud.
@vezzosetto
3 жыл бұрын
Your videos are brilliant. You are informed in so many areas of chemistry and physics, it is just a pleasure to listen to!
@testing2517
3 жыл бұрын
Wow the audio at 13:10 scared the hell out of me.
@lopany
3 жыл бұрын
I nearly shat my pants
@Phoen1x883
3 жыл бұрын
Seriously, what the fuck
@StormBurnX
3 жыл бұрын
It gave me a good chuckle. The Thought Emporium has such a distinct voice lol
@titter3648
3 жыл бұрын
On the first two places i worked after getting my engineering degree they used a lot of 60% HF both places (one solar cell wafer production plant, and one Quartz purifying plant) and it was pretty scary to work on the equipment that used to contain the HF with no safety gear after it had been drained and then hosed down with water by a operator beforehand. It was always in the back of my mind, what if they had missed a spot? On the quarts factory they used 1 or 2 1000 liter containers of it each day, and when they had used it it was just dumped into the sea via a "tank" that was open for the seawater to flow in and out of. I guess it got diluted so much that there was no danger. On the solar cell factory i heard a story about one operator that got 2 drops on his neck, and they had to restart his heart 5 times on the way to the hospital. And on the Quarts factory one operator got some (probably diluted) HF running into his gloves and the skin on his hands was damaged, but he had no other problems.
@HuygensOptics
3 жыл бұрын
Interesting stories. I guess the danger of getting it in your neck is that after absorption by the skin, it can quickly get into the main artery in your neck and quickly reach the heart. The still active fluoride can then efficiently disable the autonomous heart nerve.
@jannejohansson3383
3 жыл бұрын
Yeah, solar energy is SO GREEN, that it make people's to weges. And that was very small part of process.
@esepecesito
3 жыл бұрын
How can it be that this channel has only 4k subscribers... Great Video. Thanks!
@HuygensOptics
3 жыл бұрын
I guess it is very exclusive ;-). Personally, I like it a lot that the channel only has a limited number of subscribers, since it still allows me to answer many of the questions personally.
@johndawson6057
2 жыл бұрын
80.4k now.
@kvg4790
3 жыл бұрын
Almost had a heart attack in my cube at work when the audio changed at 13:10 I actually yelled “WTF” and had people concerned that everything was ok.
@firstname9371
3 жыл бұрын
same
@robotskirts
2 жыл бұрын
The excellent safety talk at the beginning was definitely sexier than the tesla valves.
@vesstig
2 жыл бұрын
I love how we are now at a point in time where shipping hazardous materials is so common that people don't really care about the potential risks.
@AKT_SNP
3 жыл бұрын
Ammount of underrated level of this channel is through the roof. Competence comparable with Tech Ingredients. I wish you milion views soon sir!
@goliath257
3 жыл бұрын
Thanks for the safety component of your presentation, very informative.
@Spy653
2 жыл бұрын
4:50 I spent a short time working at a warehouse which stocked a lot of heavy duty bleaches and alcohols and unfortunately it does seem that it is very common practice for dangerous substances to be transported in completely unmarked boxes because marking the boxes would prevent them from being shippable with certain companies
@ArcanisUrriah
2 жыл бұрын
Or at greater cost.
@augustday9483
2 жыл бұрын
To these companies, the price of a human life is $4 in extra safety precautions. It is despicable.
@Runoratsu
2 жыл бұрын
Just randomly stumbled upon this video, and the good commentary and grade a work made me subscribe instantly. 👍
@Tadesan
3 жыл бұрын
“Sure” God that’s a satisfying level of rigor. Thanks!!
@stetytielemans
3 жыл бұрын
dankuwel om de gevaren van werken met HF zo duidelijk uit te leggen.
@puffinjuice
2 жыл бұрын
Excellent tutorial. Very nicely narrated. I miss working in the clean room!!!
@MrArcher0
2 жыл бұрын
Love your sense of humor.
@thomaskamp9365
2 жыл бұрын
If I may take a hint: Acid is very sensitive to temperature! A warm acid is 2 to 3 times faster than a cold acid. If you then use a laser to heat the acid to the point ...... the glass would then of course have to be cooled to slow down the acceleration again. You could use it to control the etching speed very precisely. Unfortunately, my experience is based only on steel molds. So next time you get into your car and see the structure on your dashboard, you will now know that these have been etched.
@falcfire3093
3 жыл бұрын
Have you ever had a moment where you thought "this stuff is interesting, I should subscribe" just to notice you already have? Good stuff
@s33wagz
2 жыл бұрын
Your channel is so awesome!
@richardshagam8608
Жыл бұрын
Things I should have known in graduate school 50 years ago I had to learn from a KZitem video!
@gems34
3 жыл бұрын
LOL, your Tesla valve contribution was great :)
@jamescanjuggle
2 жыл бұрын
nothing here was useful to me in particular but i have absolutely no regrets watching it was really interesting learning about a cool/deadly acid and looking at rad etchings
@patrickfle9172
3 жыл бұрын
Despite not having any experience in microfluidics, I'm sceptic about the properties of Tesla valves at this scale 🤔 but they are 'Tesla' so they'll be great! 😁😉
@davidgustafik7968
3 жыл бұрын
Fascinating. There are special precautions and labelling for packaging items with small batteries. For an awful nasty poisonous acid that'll eat through glass you need a cheap cardboard box.
@makerbeelab5546
3 жыл бұрын
Nasty poison that penetrates the skin and eats you inside out, so you can't wash it off as the washing liquid would have much larger molecules and won't penetrate the skin at the same rate. Imagine a leaky bottle and a wet corner of the box... Like what the hell!
@copernicofelinis
3 жыл бұрын
To be shipped with Fed-Expendables only
@kjellkriminell372
2 жыл бұрын
Nicotine LD50 is AFAIK a very debated issue. The LD50 is apparently much higher than often reported, there is swedish snus that contains over 100 mg each.
@THEinSEnDeaieri
2 жыл бұрын
Fascinating to think how the physics of Tesla valves prove them operational at nanometer scales but not at larger scales.
@denielalain5701
2 жыл бұрын
very good example how technology is limited. i was slapping my face when i realized that you would not make a glass sheet that lets through water in one way but the other.
@sirukin7849
2 жыл бұрын
I'm looking at using tesla valves for use in exhaust systems in the arctic. Cold temperatures and high winds presents serious issues with existing direct vent (aka directly out the wall rather than upwards into a roof penetration chimney) exhaust systems. During blizzards, area's of high pressure and low pressure form around a structure. As a result, if the windward side of a building experiences greater than 60km/h windspeed, the exhaust gas will feed back into the combustion chamber of a furnace or boiler and as a result causes the incomplete combustion of fuel. The reason that I'm looking at tesla valves is because I stayed in a unit where the kitchen vent was too close to the direct vent exhaust from the neighbouring unit. Incomplete combustion resulted in black soot and carbon monoxide making it's way via the path of least resistance into the unit I was in via a kitchen vent. It took nearly 24 hours (what's the half life of carbon monoxide?) for the smell to dissipate. So tesla valves aren't useless. They just haven't been applied in places that they should be yet. The arctic is a great location for putting advantages of tesla valves to work. A flat exterior wall panel exhaust that makes it easier for exhaust fumes with the exhaust fan not being overcome by high wind speeds or higher cubic feet per minute pressure than a blizzard.
@SaladCookies
3 жыл бұрын
That packaging was an absolute nightmare 😱😱😱
@nzuckman
3 жыл бұрын
"Have fun tonight sweetie! Remember, no breathing!"
@HuygensOptics
3 жыл бұрын
Well, exhaling is allowed...
@jeanmarcROBIN
3 жыл бұрын
For comparison, it will be interesting to see as well the capillarity effect of the Tesla valve in opposition way
@ypey1
Жыл бұрын
i need more tesla valves in my life!
@andrewphillip8432
3 жыл бұрын
Awesome stuff, cant wait to see what you do with this process in the future!
@JohnDoe-gs1cb
3 жыл бұрын
But I want to see the valves working in the other direction :(
@luizguerra7807
3 жыл бұрын
I watched the entire video waiting for this :/
@luipaardprint
3 жыл бұрын
If you look at 13:33 you can see each set of six contains three valves in each direction. The principle that these valves work on don't apply at this scale.
@kwinvdv
3 жыл бұрын
@@luipaardprint I was thinking this as well. Namely, I assume Tesla valves work best when inertial forces are dominant, so for high Reynolds number. While in this case capillary forces seem to dominate. Still, it would have been interesting to see this confirmed in practice.
@luipaardprint
3 жыл бұрын
@@kwinvdv I should have written 'appear to not apply at this scale' I actually don't have a way to confirm this at the moment 😅. Maybe somebody could do a physics simulation of this.
@queenelcene638
3 жыл бұрын
You are a truly awesome individual: obviously a genius; excellent teaching techniques; a humanitarian, sharing your wealth with the World. If Tesla had had your compassion and the internet, imagine where we'd be NOW. ❤🌟👏👏👏👏👍💋🌬🥰
@bf0189
3 жыл бұрын
Nicotine poison is not uncommon these days with vaporizer products by the way of people trying to make their own solution and they don't know what they are doing or straight up drinking/sublingually consuming the solution at least in North America. Very interesting video though!
@rdizzy1
3 жыл бұрын
People used to get nicotine poisoning long before vapes even existed. My buddy got nicotine poisoning like 30 years ago from smoking cigarettes with nicotine patches on, for instance.
@Neeba-q5x
2 жыл бұрын
The most impact thing I've know from the video is that dangerous chemicals might be delivered in such unsafe packaging... not even with a sign outside... glass and some sort of 3C product would have "This side up", "Fragile", "Do not Stake" or something like that, how come packages containing dangerous chemicals can be delivered without something similar?
@wolfboyft
2 жыл бұрын
13:08 woah woah what the hell that sounded like how films do in cinemas.
@MitchFlint
2 жыл бұрын
Outstanding! As always. 👍
@jackburnell3209
3 жыл бұрын
I worked at a chemical company in my youth. I'll never forget having to watch a Dow safety video on handling hydrofluoric acid. Dude got it on his glove and when he pulled it off...skeleton fingers...to the bone!
@MegaFictionalCharact
3 жыл бұрын
Now we need high-speed camera footage through the microscope and different fluids diffusing across the valves :D
@spicken
2 жыл бұрын
I think it is fair to say that HF should not be on the free market for private citizens, unless you can demonstrate you are capable of handling it. You obviously know what you are doing, no concerns there. I fully agree with your contacting the company that the packaging is totally inadequate. In case of an accident during transport criminal negligence could be claimed and no doubt would be awarded (if the poor guy survives).
@constantlychangin
3 жыл бұрын
Awesome stuff as always!!
@dolamyte
3 жыл бұрын
You can get sheets of sapphire for fairly cheap from Shellrus that makes them for screen protectors, should you ever need to move up from quartz or boroscilicate that is.
@deserticus18
2 жыл бұрын
you just got a new fan
@markatherton7848
3 жыл бұрын
Well done; excellent as always.
@theunseen010
2 жыл бұрын
I just learned a lot! thanks and great video!
@mikeissweet
2 жыл бұрын
I keep rewatching this video periodically for the hilarious ending 😂
@andrewmiller8402
2 жыл бұрын
Seriously, Thank you! Everyone needs to talk about the dangers more! I work with hazardous materials and literally everyone that I talk to about it ( besides co-workers ) has had no idea that / or when they're doing something wrong with hazardous materials. Stay safe, my friends!
@kingASMalban
3 жыл бұрын
Exceptional
@buckstarchaser2376
2 жыл бұрын
Hmm... This has me wondering how turbojet-powered aircraft for ants throttle their fuel against the forces of capillary action. Maybe they just use those really fast ants and skip the throttles entirely. That seems both practical and efficient, from various design perspectives.
@AbgezocktXD
2 жыл бұрын
Would it be a good idea to eat some calcium rich substances before even starting to work with HF? He mentioned Calcium Glutamate. Or is that damaging in itself?
@uktenatsila9168
2 жыл бұрын
Beautiful
@assburgers3457
Жыл бұрын
That shipping condition is CRAZY. Everything I get online from Carolina is packed in mica to absorb anything leaked and further packed in more mica surrounding the enclosed bags with labels all over indicating box orientation.
@rydplrs71
3 жыл бұрын
I have cleaned up 100’s of gallons of Hf. I have calgonate in my vehicles, desk, travel bag and home medicine cabinet. I don’t touch Hf bottles or anything that might have previously contacted it without gloves.
@tzisorey
3 жыл бұрын
Huh. Opens up the world of microfluidics. Definitely more precise than the Shrinky-Dink technique I've seen in other places for DIY microfluidics.
@John-vl6hg
3 жыл бұрын
great job huygen, i always love your video. i would love to see more about what you do with etched glass? what projects have you made that involve etching sub-mm structures?
@HuygensOptics
3 жыл бұрын
Currently I'm building a PVD system that will greatly increase the types of structures I can make. It will be discussed in an upcoming video in detail.
@graealex
3 жыл бұрын
For people wanting to do etchings in glass for arts and craft, there are alternatives to HF available, like etching creams, that are a bit safer to handle.
@HuygensOptics
3 жыл бұрын
Check the acive ingredients: it will almost always be HF / NH4F, only in lower concentrations. However if people would take the time to read the warning labels of these, they would probably be more careful with them...
@graealex
3 жыл бұрын
@@HuygensOptics I checked the SDS and it is ammonium bifluoride and sodium bifluoride. It's still a lot safer, as the cream doesn't give off significant amounts of vapor, and you also cannot splash it. Wearing gloves and eye protection is obviously still required, but at least you don't need a fume hood.
@HuygensOptics
3 жыл бұрын
That is partly true, vapour will be a smaller problem. However, it still contains a huge amount of fluoride and in addition sulfuric acid. Check out the safety sheet of armour etch: www.google.com/url?sa=t&source=web&rct=j&url=www.richelieu.com/documents/docsGr/117/497/1/1174971/1501299.pdf&ved=2ahUKEwjF-rCUtIDvAhXF-6QKHQzGDp4QFjAAegQIARAC&usg=AOvVaw0aAyLZwd3_p5MkVqLAptVb
@graealex
3 жыл бұрын
@@HuygensOptics I checked it. But unless you use it as a body cream or eat it with a spoon, it seems a lot safer. Mainly because there is little splash risk.
@funckyjunky
3 жыл бұрын
HILVERSUM ! Greetings from Haarlem 👋😃
@rogerroth5412
2 жыл бұрын
Dear Gentleman, I wonder what method you have used to make the photomask. How can such small details be achieved? Looking forward to your answer. Best, regards.
@ConsertandoTudo
2 жыл бұрын
I have no clue about what I just watched, but it seems high tech and fancy
@JoseSilveira-newhandleforYT
2 жыл бұрын
I agree - sexiest Tesla valves that we can't even see with the naked eye - which, in itself, is also a sexy concept :-)
@klazzera
3 жыл бұрын
i guess the only thing that is missing from your lab is an sem, which seems like you need one because in the magnifications you operate at are at the limits of optical microscope since diffraction patterns and fringes are very visible
@HuygensOptics
3 жыл бұрын
Unfortunately, I don't have the space for one...
@klazzera
3 жыл бұрын
@@HuygensOptics i dont know man, you have many other extreme and niche equipment which are much larger in size but it's your lab of course:D
@andymouse
3 жыл бұрын
Fascinating as always ...cheers.
@das250250
3 жыл бұрын
The Kaveman Constantly impressed with your extremely good scientific content , the way you explain everything thoroughly. Of equal impression is the level of your viewers comments and knowledge
@Simonjose7258
3 жыл бұрын
Amazing! 😅 I knew Tesla "valves" were useless! 👏👏👏 Your optics are 🤯✌👍
@CATASTEROID934
3 жыл бұрын
They're not exactly useless, there's actually a Tesla valve-like structure in the respiratory system of birds which limits the movement of air during their weird four-stage breathing, by all means it's a pretty successful structure in birds big and small and has been for a pretty long time I'd wager ha ha
@newq
3 жыл бұрын
God HF scares me. My chemistry lab TA would scold us if we even wrote a fluorine ion somewhere on our notes like "you should never be making this ion in large quantities" and that psychologically imprinted itself in my brain how scary this stuff is.
@SwissplWatches
3 жыл бұрын
After the "hands photo" I decided against trying this for production processes in our shop. Wow that's some crazy stuff!
@HuygensOptics
3 жыл бұрын
very wise decision
@JohnDoe-jp4em
3 жыл бұрын
Wow, the box that the bottles get delivered in is a disaster waiting to happen, absolutely ridiculous. Just to save a couple bucks that company would rather risk someone getting permanently disfigured in a pretty reasonable scenario....
@thedanyesful
3 жыл бұрын
Did we watch the same video? Permanently disfigured really doesn't cover it. lol.
@UnitSe7en
3 жыл бұрын
You mean permanently dead, not disfigured.
@machinedragon
2 жыл бұрын
You asked what the practical applications are . Tesla originally was using it in his electric turbo jet engine. And Pulse jets . At high frequency mechanical check valves break. The optimum frequency for his tesla turbine pump was so high that the blades self destruct. To get away from Reed valves he used the valve conduit. Modern applications . Chemical dosing in ultra tiny quantities. Using the intrinsic diode failure effect . Push a chemical in reverse and you have a extreme high regulated drip.
@Joemama555
3 жыл бұрын
heheheheheh he said "at first glance..." when the safety instructions clearly say "Avoid eye contact" hahahahaha lolz ;)
@GRASBOCK
3 жыл бұрын
Just when I was thinking about doing this. Awesome!
@ckcgaming1134
2 жыл бұрын
Edge is indeed build on chromium... Which was a nice update that made it a better browser
@rb8049
7 ай бұрын
That was crazy how those were shipped. Should be double packaged with a plastic bag thermally sealed.
@AndreasB-p8w
3 ай бұрын
Yeah because at the time when something happens, the legeslative is rotating to put big bans into force, because some people were just dumb.
@WalterSamuels
11 ай бұрын
Oh wow, I was going to try and create a fiber optic tesla valve using a 3d printer but then I stumbled across this video. Have you tried creating a longer one and seeing if it has any optical properties on laser light? I.e. measure the wavelength & amplitude on the output side? Would also be interesting to see the tesla valve etched into a magnetic material.
@helmut666kohl
3 жыл бұрын
And here I stand thinking that I am on a watchlist because I order Formic Acid for bathroom cleaning :-)
@sleepychemist2701
3 жыл бұрын
As a chemist, I almost had a stroke when you showed the packaging of the aqueous HF. If I received that I would probably would have sent them and the US EPA a strongly worded letter (I recognise that you aren't in the US)
@bernhardneubuser8163
2 жыл бұрын
No, he is in The Netherlands. Customer rights and customer savety do not count much here to my experience.
@nonoisaidno6901
3 жыл бұрын
do you think to try to show flow circulation with a slow mo cam ? and colored water ? really interesting vidéo
@HappyHarryHardon
3 жыл бұрын
I used to rebuild vacuum pumps that pulled down in HF processes in a wafer lab. They were nasty and almost every part had to be replaced. Glass is no problem.
@hoimooi9278
3 жыл бұрын
This is just amazing!
@gaminglikeapro2104
3 жыл бұрын
Superb video. How is the pattern drawn in the first place at microscopic levels ?
@mikem6549
3 жыл бұрын
If Tesla valves work shouldn't flow in the opposite direction be slower. Could colored liquid be used to make flow clearer?
@mrbigheart
2 жыл бұрын
awesome content! great attention to detail and safety measures.. please do, make more of these! :D
@mahdikarimian6862
3 жыл бұрын
Thanks for your highly impressive videos. Is this lens like a single liquid-crystal optical lens element that is used for Spherical aberration, astigmatism and coma correction?
@HuygensOptics
3 жыл бұрын
No it's actually a kind of a diffractive lens similar like a Fresnel zone plate but then with 2 different phase levels, introduced by the height differences in the glass.
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