How much you can scratch a vacuum glass vacuum chamber before it comes to weak to hold vacuum? We decide to test that and film everything in super slow motion with Chronos 1.4 high speed cameras! DON'T TRY THIS AT HOME!
The picture is bit weird since I had to use bright led panels for high speed cameras. But I think slow motion clips are so nice that it was well worth it.
Well, you have your next series of videos. Make a tube, put material "x" on top, pull a vacuum and break it. Possibly with the press like I thought this video was going to do.
Indeed worth it. Maybe it was great that it imploded only when you threw it with that depleted 9V battery that's always laying around in every Finnish room. It might not have imploded that well without full vacuum.
This was really interesting Lauri/Annie how it took you to throw something(9-volt🔋battery)at it to FINALLY get the pressure chamber to implode. How about using a marshmallow next time in the vacuum chamber to see how big it gets?.
So cool, instead of bouncing off of itself in the collapse, the lack of density allowed most of the particles to fly through the debris to the other side as a projectile.
I love how this started off as a scientific test, then at the end just turned into throwing random shit at the chamber until it broke. Reminds me of how Mythbusters was when they busted a myth but still wanted to "make it happen."
I'm as shocked as you were that it was that tough. I was saying it the same time as Lauri, " Holy S--t!!" That slo-mo has become my new favorite. Great video!
I was a glaizier ( glass mechanic, installer ) for 30 years, and I can attest to the strength that glass can have in certain situations. It can also be very fragile in others. When you put the vacuum to the chamber with the crack in it, you effectively pulled the crack together even tighter. Glass can be some very unforgiving shit and I've seen people maimed and even one guy killed by it ( sliced carotid ) in my career. Be super careful when messing around with it, as a single little sliver in your bloodstream can actually kill you. Subscriber since the begining and I'm thrilled to see your channel growing! Keep up the good work!
you do a lot of silly stuff but very interesting stuff too... this on was very interesting. I though it would break after the second or third hard scratch.. and would have bet money it would not stand cracked.... Thanks for your time and effort to keep me occupied your great folks..
I think some experts were wrong this time about how brittle these bell shaped glass things are. But the explosion was bit larger than I was thinking. We crushed bottle shaped vacuum chamber with the press some time ago and it didn't do shit compared to this :D Maybe the thinner glass got more speed since it's much lighter
Rainer Riegler surely a circumferential scratch on the inside of the parallel cylinder wall will be under tensile stress. That’s the one scratch Laurie didn’t try.
I love your videos and channels... It's cool that you are both constantly innovating with new equipment, drone filming, and new ideas. Your videos show fun destruction but also show the science behind it. Keep up the great work! Cheers from the US!
Be interesting to view it against a polarised light, could do it with an lcd monitor displaying a white screen and a suitable polarising filter on the camera.
OMG that was awesome. That Implosion!!!! Was very interesting to watch. I was always like: "if he would do this or that, maybe it will break" and then you did just like that, and it did'nt break :-) Thanks
Great video :) I was listening on headphones and really enjoyed the audio inside the vacuum as it gradually when silent and then the whoosh as the air came back in.
Great shot. I always wondered why people said beware of an old crt screen explosions, I always thought that it would implode and stop in the middle, rather than actually going through the centre and out the other side!
From the slo-mo footage it doesn't really look like all the scratching and the big crack had anything to do with the final implosion. The breakage started where the battery hit and spread from there.
True... You can scratch the glass as much as you want unless there becomes actual hole that would let air come inside. It's the opposite if you try to overpressurize the chamber as then the glass might actually bend through the scratches. Throwing the battery did actually cause so much surface tension that the new crack went through and caused avalanche effect.
That slow-mo shot of the dome imploding was absolutely unbelievable. Better than most of what the actual 'Slo Mo Guys' actually produce. Your work is truly one of a kind.
The "actual" slow mo guys? Like they are the authority on high speed photography? Like there's hundreds of imitations floating about as if they are the only ones to access a high speed camera? 🤣🤣🤣🤣🤣🤣
The high-speed of that breaking is phenomenal. Looks like a collapsing star. The outer layers (glass) are thrown inward by gravity (atmospheric pressure on the glass) & when the glass is sucked into the center & collects making a semi-solid "core" due to the smaller fragments etc & the slower, larger shards hit the core & bounce out. So nice to see physics working so similarly.
I think the bell jar top is a parabolic curve which is very strong during compression, which is what a vacuum does to that jar. It does not want to give off energy, but absorbs energy. Just look at bridges and how those arcs are, much like the top of the bell jar.
I've used bell jar type vacuum chambers like that in aerospace testing. The ones I used 20 years ago are still in use and they were 30 years old when I used them. They can last forever.
Very cool implosion! Glass is just really, really strong, and as long as the forces are balanced across its surface it’s tough to destroy... Right up to the point where you put a significant amount of force at well, a point, and then the forces are applied laterally instead uniformly inward (For a vacuum chamber). I’ve had to cut glass quite a few times and it’s always a little surprising how much force it takes to snap- hopefully along the scratch you made, and not all over. You pretty much have a single shot at making that scratch since otherwise the cracks tend spread outward from any additional scratches since you can never scratch exactly the same place.
