8 ms·
Does glass break faster than a bullet? [video]
- pcurve 4y agoapparently there is a bullet that will go nearly as fast as (still slower) https://en.wikipedia.org/wiki/.220_Swift https://en.wikipedia.org/wiki/.220_Swift
- hackcasual 4y agoThe .22 Eargesplitten Loudenboomer could probably do it with modern propellant
- jholman 4y agoWhen I googled that I was 80% confident that you were trolling me and I was falling for it. Nope.
- jkingsman 4y agoAwesome video -- pretty low on fluff compared to how bad YT can get these days, which is a pleasant surprise. I totally understand the physics and reality of sound/light/etc. traveling different speeds in different mediums, but it's always such a wild thought to me. It tickles my brain in such a delightful way.
- permo-w 4y agogiven that (in physics) sound is vibration, I think a clearer way of phrasing it is that glass cracks at the speed at which a vibration can travel through it. glass is much denser than air, so the particles can knock into each other more easily, meaning that the speed of sound (or vibration) in glass is a lot faster (this isn’t aimed at explaining it to you, just to write out my thoughts, as I found their explanation a little odd)
- version_five 4y agoFor anyone who doesn't want to watch an 8 minute video, the glass / bullet race is at 2:40. Maybe it's low fluff relative to other YouTube videos, for me it could have been a 5 second GIF without any real loss.
- photoGrant 4y agoSome want education. Some want entertainment. Some want some wrapped in some. Sometimes.
- into_infinity 4y agoThis is less about "customer demand" and more about having to meet minimum video length for mid-clip monetization slots. Strictly an artifact of how YouTube works.
- photoGrant 4y agoI didn't know, I pay the Premium to hide that stuff. Regardless, given the effort and lengths they went to, I'm happy to see them do so in a manner that funds their ability to do more.
- WhackyIdeas 4y agoYouTube know what they are doing… irritate the hell out of you until you buy Premium. I once had YouTube on in the background and an advert which was an hour long popped up - but I was focused on something else and away from the screen and the tv remote. The advert? A video of someone pointing a camera outside of a window during the night and onto a dark street (no sounds other than rustling from the person holding the camera). An hour long of it. Skip. It was soon after this I paid up.
- RobotCaleb 4y agoYou ... rewarded this behavior instead of installing ublock origin and never seeing another YouTube ad?
- walrus01 4y agoHandgun rounds are really quite slow - now do it with a 5.56 NATO 55 grain FMJ from a 20" barrel at 3000+ feet per second. Basic rifle chronographs are under $200 and high enough Hz precision to measure feet-per-second of different rounds accurately. You still can't see it and differences are imperceptible to human senses, but chronographs/chronometers are a heck of a lot cheaper than a super-slow-motion camera. Commonly used for people testing out different combinations of things for long range precision target shooting. https://www.snipercountry.com/best-shooting-chronograph-review/ https://www.snipercountry.com/best-shooting-chronograph-revi...
- AustinDev 4y agoThey clocked the glass at ~3,000 mph so it'd be a lot closer with 5.56 being ~2,000 mph. The fastest production bullet I believe is .270 Swift which is over 4,000 fps depending on barrel and conditions.
- vidanay 4y agoPick consistent units!
- walrus01 4y agoGetting Americans to not use measurements like grains (for powder loads or bullet weights), feet per second, yards, MOA, cartridge dimensions and chamber dimensions and barrel sizes in inch-based measurements and other non-metric measurements for anything rifle related is unlikely to happen anytime soon. Unfortunately. Even things which happen in supposedly entirely metric countries in Europe/NATO land use USA-spec things. Such as: Oh, you want to replace a barrel on your M4 rifle used by a European military? Time to get out your half inch square-drive socket torque wrench and torque that barrel to a certain value in foot-pounds... And after you're done you get to mess around with your SAE spec hex key set to reinstall the hand guard and associated stuff. I'm not kidding.
- vidanay 4y ago
- satvikpendem 4y agoRelated, hitting a Prince Rupert's drop with a bullet: https://youtu.be/F3FkAUbetWU?t=104 https://youtu.be/F3FkAUbetWU?t=104 TLDW: The bullet shatters and the drop stays intact.
- walrus01 4y agoI wonder what the results would be if done with a steel core/AP type rifle round , the bullet in the video appears to be jacketed plain lead at pistol velocities.
- sophacles 4y agoThe same channel did a follow-up with rifles here: https://www.youtube.com/watch?v=k5MORochIDw https://www.youtube.com/watch?v=k5MORochIDw
- walrus01 4y agoFor sure some very different results but it looks like they're using low cost jacketed plain soft lead. I wonder what the results would be with an M855A1 (available to civilians) or real armor penetrating designed round. https://smallarmssolutions.com/home/the-m855a1 https://smallarmssolutions.com/home/the-m855a1
- aidenn0 4y agoThe difference in muzzle energy from a .38 special revolver and a mini-14 (5.56 NATO with an 18.5" barrel) is so high, it's not surprising.
- permo-w 4y agoI’m surprised the fragments didn’t cause the whole thing to shatter when they came into contact with the tail
- pcalderw 4y agoThey describe (at 2:19) that they annealed the tail to remove the tension allowing it to stay intact.
- __MatrixMan__ 4y agoI wonder how the speed of glass crack travel compares to the speed of sound in that particular kind of glass, and if the deficit can be accounted for by the fact that the cracks are not traveling in a straight line.
- nibbleshifter 4y agoThe shockwave (which travels ahead of the cracks) travels at the speed of sound of the material. I'd hazard a guess the shockwave propagates about twice as fast as the cracks.
- __MatrixMan__ 4y agoThat's a fine guess, and it's not like I know any better, but if the fronts don't travel at the same speeds then... why? If there's enough kinetic energy to break the bonds in the material, what's it doing before they break?
- AnotherGoodName 4y agoThe cracks don't travel in a straight line the shockwave does. That's it. Speed of sound can be literally thought of as the speed that force propagates in a material.
- xeonmc 4y ago> Speed of sound can be literally thought of as the speed that force propagates in a material. A.K.A. speed of mechanical causality
- marcosdumay 4y agoThe shockwave is probably at a constant distance from the cracks (AKA, the same speed). If it gets too far ahead, it will just create another crack, in an independent direction, and you get one of those random curves you get on the crack.
- Blue111 4y ago
- smsx 4y agoWhy does this sound like ChatGPT?
- into_infinity 4y agoSounds authoritative while being wildly inaccurate?
- dsfyu404ed 4y agoIt's kind of scary that AI is now indistinguishable from Redditors that have Googled things and think they're experts because people actually take the advice of the latter with regularity.
- a9h74j 4y agoFor that you want news.chatgpt.com
- deleted 4y ago[deleted]
- zeven7 4y agoThe glass broke by first spreading cracks through the glass, then seemingly simultaneously shards flew apart from the whole glass. I'm curious what accounts for the sharding part appearing simultaneous. Why didn't the sharding process start on one end and travel through the glass?
- into_infinity 4y agoThey speed up the second part of the video. The "flying apart" bit happens at much lower speeds and would be boring to watch in extreme slow-motion.
- Natsu 4y agoThat was a piece of tempered glass, as we can tell due to the way it broke into tiny pieces. Due to the tempering process, where it's heated then quenched by large fans, the glass is under stress that's concentrated at the edges, and especially the corners. This is why it explodes when they break the edge the way they did. Ordinary annealed glass would've broken into large, sharp shards, whereas laminated glass would form a break pattern like annealed, but would stay in one piece due to being attached to the plastic inner layer.
- la64710 4y agoAn interesting new material https://scitechdaily.com/ground-breaking-new-shock-absorbing-material-can-stop-supersonic-impacts/ https://scitechdaily.com/ground-breaking-new-shock-absorbing...
- coding123 4y agoI watch slow mo guys pretty religiously. Their other video on bullets and glass was also a fun one - they shot through a bunch of glass panes and it only penetrated like 11 sheets of regular glass. I thought that was interesting.
- deleted 4y ago[deleted]
- interroboink 4y agoFor your convenience, the answer is "yes", and this is the timestamp where you can see them race: https://www.youtube.com/watch?v=TAO1i9Z9GpQ&t=162s https://www.youtube.com/watch?v=TAO1i9Z9GpQ&t=162s As always, the good stuff starts 1/3 of the way through any given video (: I remember someone stating that "rule" at one point, but not sure if there's an official name for it.
- adav 4y agoWadsworth Constant, I believe.
- skykooler 4y agoThe Wadsworth Constant.
- sc00ty 4y agoAs others have said, the Wadworth Constant. You used to be able to add &wadsworth=1 to any youtube url and it would automatically skip ahead. They got rid of it at some point though.
- blamazon 4y agoYou can press 3 on the keyboard to skip 30% of the way in, it's a reasonable approximation.
- jrmann100 4y agoIf you find yourself constantly searching for highlights, I highly recommend the SponsorBlock extension (https://sponsor.ajay.app/ https://sponsor.ajay.app/), which crowdsources this job effectively (as well as targeting sponsored regions, credits, etc.) Using the extension I could hit "return" to jump to results at 5:28.
- dsfyu404ed 4y agoThat's a pretty slow bullet (I'm assuming it's a spicy 9mm). It should be possible to load rifle cartridges that are fast enough to make the race interesting.
- HPsquared 4y agoTheir second channel goes into some of the equipment and behind-the-scenes stuff, an interesting one is showing off their file server for the raw video files, 960 TB worth in a small rack-mount unit.. incredible how much data these high-speed cameras produce. https://www.youtube.com/watch?v=JHVSoJDZ06U https://www.youtube.com/watch?v=JHVSoJDZ06U ("Unboxing a petabyte")