Dope Tech Episode 2

<<@veritasium says : Get an exclusive 15% discount on Saily data plans! Use code veritasium at checkout. Download the Saily app, or go to https://saily.com/veritasium>> <<@SaulDrone says : 14:40 whaaaa???>> <<@CyclicMac says : 16:00 Why isn’t the glass melting?>> <<@jason101thepimp says : Railroad worker smoking while on the job outside. 😂😂 Glad to see they havent changed and hope they never do. Hard working men there.>> <<@Callum-e9u says : Was there ever a part 3 made?>> <<@IbnFarteen says : Ridiculous! Looks like a 19th century technology. Elon Musk should have a look and invent an automatic system for the 21st century.>> <<@1323lobo says : Why not use jet fuel? Lol 😂>> <<@anthonyhumbert8787 says : 4:52 that is not a circular saw. That is a chop saw or demo(lition) saw.>> <<@yelyab1 says : Great comment on both the labor and the technology. Some day I hope they find a cure for the backs of guys like you who get consumed by your work.>> <<@Kapparie says : In the end of the video you show a piece of rail where it is bolted to the sleepers. But here in Europe the rail gets clamped to the sleepers with spring loaded clamps. The rail is allowed to slide under these clamps during expansion and contraction. Can you explain how thermal expansion is controlled in this situation?>> <<@lllllRBlllll says : 24:30 for those who just want to know.>> <<@00Damien says : Excellent video. Thank you for your work.>> <<@ballbby3775 says : Dude u did a awesome job with this video, this subject has always held my interest and the freaking cutaway with glass so we can see what's goin on inside was just awesome. Great video>> <<@1992jamo says : In the UK, lots of rail is still bolted together.>> <<@leksaboirektaa2909 says : 23:00 i have used the same software, but to measure the strength of plywood, pretty wild that the same stuff is used for railway weld testing>> <<@codyhamilton7682 says : Why not leave the breaks in every so often? Especially around/before bends when you want to slow down anyway>> <<@Yoninjazero says : …?>> <<@kb3483 says : 26:47 indicates there is a Part 3 of this Thermite series, but I can't find it. Is it under another title? Was it taken down? Please advise. My family is really enjoying watching this series!>> <<@roysigurdkarlsbakk3842 says : Was the part 3 of this ever created?>> <<@Brett.1984 says : The host has never done manual labor.>> <<@NoNameIdk1 says : The trains I go on still make that rail noise>> <<@the_notorious_tj2600 says : 3:29 my Hometown Essen… Nur Der RWE 😂😂😂>> <<@patjohn775 says : This is ridiculous… you could just send one pipe fitter with a mobile generator rail mounted, welder and grinder. This would be done in 1 hour>> <<@AbdurRahman-gy4qx says : In India (I am from India) there are still gaps in the joint and they use bolts>> <<@Scott-J says : If you think this is cool, you want to study Materials Science. Quantum Physics, Chemistry, and Mechanical Physics rolled into one discipline.>> <<@ryanjackson645 says : IS IT CAUSE THE R.R. SHIFT WITH THE RAILROAD TIE PLACEMENTS??>> <<@EvilMrDogbert says : Cool vid, thank you. But only slowly beginning to lose the bad taste that that ' Elon musk' episode created.... Veritasium (derived from veritas, meaning truth) and we got a lie. I wonder how that hyperloop is doing? I wonder how mars and moon bases really fair against the science(they don't). Still....slowly getting that cred back....>> <<@Felonnnee says : Because the stones the track lays on move instead of the rails.>> <<@bugtusslealien3931 says : I watched an Indian video on thermite welds on train tracks before this. The Indian guy wore the required steel toed sandals with bare naked eyeball protection and rag clothing.....no one complained. He even took a dump and wiped his arse with a rock. Got to admit smart men and tough as nails. All I see and hear from this guy is ughhh I'm hot, I'm sweaty, it's heavy, where do I toss this. Let's go to an air conditioned lab, here buy this thingy. If I wanted to hear all this whining I'd still be married.😂😂😂😂>> <<@gregtitus2467 says : Astounding. Absolutely astounding. What a well-done, instructive video. This could easily be a role model for others.>> <<@ericbailey2535 says : Joints give my belly some expansion 😂>> <<@majormixer7804 says : to me as a german it sounds kind of absurd that you found a company to film s rail installation with in the german countryside our train system has been crumbling for 20 years>> <<@VincentRiquer says : Did the private equity thermite the footage for part 3? You promised it, it's filmed already, come on Derek!>> <<@MAMOONAZHAR says : 6:45 rail tracks have barcodes 😂??>> <<@dotinsideacircle says : They found a great use for thermite in 2001.>> <<@Niklas391-7 says : Germany mentioned!!>> <<@EarthlingNews says : 5:23 at least he's honest>> <<@codyott1982 says : For anyone wondering, this doesn't really get easier with experience. Maybe it goes a little quicker, but it does not get easier.>> <<@Chris-Lynch says : A thermite reaction doesn’t make steel, it actually makes very pure Iron which is brittle. I never actually checked this but I assumed a stoichiometrically correct addition of carbon to the Aluminium and Iron Oxide thermite mixture was the solution. Anyone know if this is actually the case?>> <<@KI11TY-t5u says : Titanic?>> <<@MaraKleiber says : YES. A video for train enthusiasts. Thanks.>> <<@ArifinHossainMahin says : Here is no third part>> <<@Halbarad3019 says : 22:42 Viratsium turned into a little Hobbit>> <<@TomHuston43 says : Fascinating!! Is the narrator trained in science/engineering?>> <<@GTrax1992 says : Aligning the rails perfectly without dropping that cigarette ash onto the rail is a sign of true mastery of his craft. 😮 10/10>> <<@rameybutler-hm7nx says : I got a question? Why does germany use stone ties instead of wood? Also much respect to railroad workers they work hard. I wish the rail road system in America was more extensive, imagine a high speed rail across america, i could live in mississippi and work in new york or chicago or california and be home every night! It would almost solve the employment nightmare we have here in north america!>> <<@Countryboy071 says : Thermite is good but marmite is better 😊>> <<@donaldpaterson5827 says : It seems to work in temperate climates, does it work in tropical climates. Around seventy years ago in science class, I was shown a rail line in India which was very badly buckled due I was told to the line expanding, whilst some fish plates were compromised. This rail had buckled to what seemed to be around four feet in height. Why doesn’t the solid rail buckle?>> <<@dawedoctopus8141 says : Thank women and black folk for this you bigots!!!>> <<@usakicksass says : 50 some years ago engineering class teacher....stress is when you wake up hard as a rock and gotta pee, strain is when you bend that down to hit the toilet. Edit: all male classes....oh my!>>