Jixuan & Sebastian: BUSTED! (Part 1)

you know this time thought i'd have felt guilty about doing something like this but this ain't one of those times we made this video to show you that we should always do our own research in order to check and verify everything which is said in your video meet jake swan and sebastian who think that they've actually debunked one of my videos all mistakes exposed so let's go through all the arguments thunderfoot brings forth against the hyperloop and debunk them one by one yeah this this anger went well check and verify everything which is set in your video of course this also applies to our videos remember you wanted this have you ever wondered what it would look like if two exceptionally gullible sorry elon musk fans with no experience in science or dealing with vacuum systems tried to debunk a doctor with decades of experience in dealing with vacuum about to be systems why is that voting oh yes this isn't going to end well but don't worry they've got a holy document to protect them the white paper on page 54 section 4.5.2 it is written elon musk said it they believed it that settles it no matter what reality has to say on the subject yes they're gonna debunk my hyperloop videos with uh academic arguments of the intellectual caliber of if we want infinite power why don't we just plug a power strip into itself with science understanding like that i think you can see why i'm in mortal peril from being debunked by these people i mean let me just give you a flavor of the caliber of people we're talking about i'll preface this one with yeah most people know that if you get a bar of metal and heat it up the metal expands and the amount of the expanse per degree celsius is a expansion coefficient complicated stuff difficult to mangle that one over to you walks on and sebastian then he goes on to talk about how the temperature differences would make hyperloop impossible because it would expand or contract by so much along its entire length that it would vary by an incredible 300 meters in the case of 40 degrees celsius temperature difference between both ends now i thought i made this idiot proof in my original video i already did i didn't think it would be possible for someone that do not understand what i was talking about that you know on a cold day it's going to be shorter and on a hot day it's going to be longer here is the original video just see what you think most people know that if you just have say bridges you need an expansion joint in them so let's take a look at the expansion for steel it's about 13 parts per million per degree celsius so let's say the temperature range is going to be between freezing point and 40 degrees celsius that's basically a hot day which means the overall length of this tube is going to vary by about four 500 parts per milliliter and that sort of thing which means that the overall length of the hyperloop from the coldest day to the hottest day will vary by about 300 meters about the length of three football fields yeah so there you go clearly stated in the video i'm talking about the length between the hottest day and the coldest day and it's there in the graphics he's not just going to miss that he's going to mangle physics which let's be honest the linear expansion of things when they get hot not the most complicated of concepts to grasp he is going to mangle that to the point of unlimited power and then he's gonna smugly conclude that he debunked me good it sometimes helps to do a bit of physics you know but wait wait this argument would only count in the case that we would see for example minus 20 degrees celsius at one end of the hyperloop and then this temperature would gradually increase all the way to plus 20 degrees celsius at the other end of the hyperloop because that is how the temperature variation formula which he probably used works oh that is just so precious i mean i i i laugh out loud every time i i hear him do that because it's so mangled you know quite often it helps if you start from an understanding of the physics and the math is just something that describes what you understand and so no the formula doesn't say that it depends on the temperature of both ends of the object if you understood the concepts that's not what it's describing it's describing how the length varies with temperature not the different temperatures of the ends of an object however in reality of course there would never be a scenario where we would witness a 40 degree celsius temperature difference along a length of 600 kilometers imagine having minus 20 degrees celsius in san francisco while at the same time having plus 20 degrees celsius in los angeles i mean it just keeps on digging seriously if you understood the concept you would understand that if it was -20 at one end and plus 20 the other the overall length wouldn't actually change at all you know position of them might change somewhat but the length of the tube would contract by exactly the same at one end as it expands at the other i mean this is the thing he just picks up a formula makes up what he thinks the terms are and thinks he's debunked something now how this actually would work is that of course we would see many temperature fluctuations along the entire length of the hyperloop hi i'm sebastian i studied physics also in munich germany meaning the hyperloop would contract expand contract expand contract expand and so on and so forth along the entire length try not to speak is this a piece of your brain i mean he just keeps digging with this alternative physics world i mean even if that were how it works that's not how it would work what we're actually talking about here is the temperature saturn the day and the temperature during the night because it's going to be day everywhere on the hyperloop so it's going to have a length during the day which will be longer than the length during the night when it's cold and that length variation will be about 300 meters and on top of that you get the seasonal variations where you get the length on the hottest day and the length on the coldest day this is not difficult stuff to understand but he just keeps mangling it therefore in reality the length contractions and expansions would just on average cancel each other out along the way and the net result would be a quite negligible contraction or expansion which is by the way addressed in the hyperloop white paper on page five where it is suggested to use a telescope tube for entrance and exit off the tube to accommodate for these length variations yeah i mean you had to literally not understand reality to make it conform to the white paper but sure all praised the white paper mathematically speaking the sum over all length variations along the entire tube is according to the length contraction and expansion formula equal to the sum over alpha times all the temperature fluctuations along the entire tube alpha being the expansion parameter so therefore a constant let me just add a slight correction that'll actually make your interpretation of this maths actually make more sense alpha is the white paper which transforms what all of these terms actually mean into something else we can pull alpha in front of the sum so that we have alpha times the sum overall temperature fluctuations but since the temperature goes up down up down and so on and so forth delta t has an alternating sign so plus minus plus minus and so on and so forth therefore the sum over all the delta t's will on average cancel each other out yeah at the moment this picture does a pretty good job of describing sebastian's level of understanding of this problem so no this is not as simple as just to say plus 40 degrees temperature difference and then i take the entire length actually yes it's exactly that simple you know there are many temperature variations along the way and many expansions and contractions along the way that cancel each other out to a large extent yeah so in order to debunk me they had to claim that the hyperloop's average temperature during day and night is exactly the same because it all cancels out over small distances you know that whole thing about you thinking it gets cold at night doesn't really happen and warm during the day that doesn't happen either you know this way they can show that the white paper was correct it may not therefore surprise you that our uh elite elon musk scientists here sometimes have to uh how shall we say twist things to make them easier to debunk you know kind of like a straw man like say for instance this now he starts the video by saying that it's impossible to build a 600 kilometer long vacuum chamber why that's odd that doesn't really sound like something i would say and it's also bizarre why didn't they actually take the quote of what i'm saying out of the original video you know why why do they have to say what i said well let's take a look at what i actually said shall we it's also much cheaper to build is about 1 10 the cost of the proposed california high-speed railway system this means that tickets could cost as little as 25 dollars a thousand kilometers per hour in a vacuum tube for less than the construction costs of what is currently proposed for the high speed rail connection it will generate more power than it uses by solar panels and a ticket will only cost about 20 bucks yeah and it's complete [ __ ] now sure the principle is fine it's just not viable in practice you know it's like the sole roadways thing it sounds great but in reality it's just [ __ ] made up by snake oil salesman or the mindlessly optimistic daydreaming of those who just don't want that better taste of reality the first real challenge is simply the new impossible goal of building a 600 kilometer long vacuum chamber now he starts the video by saying that it's impossible to build a 600 kilometer long vacuum chamber no he says it would be nearly impossible like say for instance the examples of solar roadways you know where they were claiming all we had to do was coat all of our roadways with solar panels which would be cripplingly expensive and not even remotely cost effective that's not the same thing as saying it's impossible it's just saying it would be dumb to do it by the way we shall often refer to elon's legendary hype loop white paper from 2013. all glory to the white paper now on page 12 of the white paper it is detailed that in fact the hyperloop will not contain a perfect vacuum but low pressure air at a pressure of 100 pascal and it is therefore classified as a medium vacuum a medium vacuum can be kept up with vacuum pumps every few hundred meters quite easily as compared to what would be necessary to achieve an extremely high vacuum or absolutely perfect vacuum oh wow people who mangle basic physics concepts i mean we're not just talking about minor numerical errors or something we're talking about people who mangle basic concepts and how can i lecture me on vacuum systems fine well let's start with the obvious what scientists call different novels vacuum is actually kind of an irrelevance here you're talking about removing 99.9 of the air that means you'd actually need some pretty sophisticated kit to tell the difference between that and a perfect vacuum trust me i've got half a dozen gauges in the lab that do this sort of thing so yeah there are medium vacuum of the hyperloop is 99.9 percent towards a perfect vacuum you remove that remaining one part and a thousand extra air and you have a perfect vacuum and for certain for your body this will be basically absolutely indistinguishable from a perfect vacuum thunderfoot makes this argument for a perfect vacuum which is clearly stated in the white paper will not be employed in the hyperloop that is the whole point of hyperloop not to have a perfect vacuum inside the tube but a medium vacuum which basically is very low pressure air oh god once you're getting out of this little level of pageantry all vacuums are just low pressure air it's extremely easy to upkeep the medium vacuum in the hyperloop by just having vacuum pumps arranged along the length of the tube say every 100 meters yeah these people have never worked with a vacuum system in their lives i studied mathematics and actual area science but verbally my real passion is breaking look if it was a perfectly sealed system all you need to do is pump the right amount of air out of it and then close the valves and you're done you don't need to do any more pumping reality isn't quite that nice all systems leak and as a general rule the bigger the system is the more difficult it is to find the leaks on it say for instance if you had a 600 kilometer long tube finding the leaks on it would be almost impossible so if you've resigned yourself to your system leaking then you have to continuously pump on it now the way that they're suggesting doing it is you have pumps every 100 meters did they say which means that you're going to have some 6 000 pumps along the length of the hyperloop now there's another rule about vacuum systems and bigger they are the harder it is to find leaks and the more seals there are on them the more likely it is to leak and they're proposing out of the bag having 6000 pumps on this system that 6000 potential leak points add to that those aren't realistic numbers if you want to pump this hyperloop down in a sensible amount of time i did this calculation in my last video you need about one pump every 10 meters meaning that you would need something like 60 000 seals at least on this vacuum chamber just to pump it down in a sensible amount of time like a day or so he then says that the outside air pressure would be just far too high and that it would crush the tube oh boy why do i get the sinking sensation that you're about to again use your fearsome ability to not understand basic concepts of physics to prove that i'm wrong we can calculate the stress acted upon a tube quite easily this is basic engineering mechanics boy does this guy hype love putting in the over complicated maths to dig his own grave we have a radial component of the stress called sigma 2 and an axial component of the stress called sigma 1 as shown in this drawing here now for hyperloop we can use the thin wall approximation for which the inner diameter r of the tube spoiler alert he's about to do the metaphorical equivalent of proving that birds can't fly cause steel is heavier than feathers they're both a kilogram it steals heaven feathers must at least be 10 times larger than the thickness t which is the case for hyperloop of course and we get a very simple formula to calculate the hoop stress sigma h now we find that sigma h is the difference of the internal and the external pressure yes kids today on story time an elon musk fan is reading out a completely irrelevant formula times the external diameter divided by two times the thickness so pi is the interior pressure pe is the exterior pressure de is the external diameter and t is the thickness of the tube which is for a typical hyperloop about 1 inch or 2.54 centimeters of steel this steals heaven feathers the internal pressure pi is hundred pascal the external pressure pe is atmospheric pressure so hundred kilo pascal the external diameter de is two meters we never get a hoop stress so a circumferential stress of three point four megapascal the longitudinal stress honestly when you understand where he's going with this it's just painful to watch a man screw up this badly the long tunnel stress by the way is the home stress divided by two so we get along the journal stress of 1.7 megapascal and now of course the price question is one inch of steel strong enough to withstand up to 3.4 megapascal of stress all right let's put this muppet out of his misery if only there was some simple way i could demonstrate it in my kitchen using a compressor and a vacuum pump yeah and why not a coke can so let's start by trying to see just what's the uh what sort of stress a coke can will take so obviously we're gonna have to apply pressure to it so we're gonna need a way of uh you know sealing all this up and let's start by getting that off all right i don't know i'm gonna do this quite yet let's see how it goes there we go that's not a bad way done it along with those lines i just need a way of actually having this all hole together i'm just going to use hot glue in the first instance because yeah it's quick it's cheap yeah there you go hot clay that's nice there we go we have the most brutally sealed up coke can ever good so what sort of pressure do you think this will take before it goes bang or more maybe more interestingly what sort of vacuum do you think it'll take before it goes good so another man with a lot of patience so let's go straight for it right at the moment this is a compressor and the compressed gas comes out of here and there's not much pressure in there at the moment so let's get some pressure in there and let's start with two bar okay okay good so now we have two pair of pressure two bar of pressure by the way you usually hold too bad with your finger oh it's leaking somewhere else so i can hold two bar with my finger okay so the question will our coke can let's zoom out for this will our coke can take two bar of pressure right right i don't know if this will work so let's pressurize it yeah yeah there you go so it's now actually hard to push because it's pressurized and if i take the pressure off which is down like this and that's soft to push yeah so it takes two power it's not bad okay let's do that again nice and soft to push pressurized and it's hard to push wow it takes two bar i wonder if we make it three bar those might be pushing it a bit so anyway you see we're up to three bar soft soft soft fresh oh that's getting hard to push now that's really getting hard to push so that's three bar right awesome so that will take up to three atmospheres of pressure so it must be able to take minus one right well let's go try shall we swing so he's now hooked up to the vacuum system and as you can see there is one atmosphere of pressure around there at the moment so let's start this up oh wow wow i only took a tenth of an atmosphere out and look what happened that's what a reduction of a tenth of an atmosphere did even though it took up to three bars of pressure and let's just do this for good measure oh no no that's that's half an atmosphere of pressure that's basically all of it oh no that's that's a disaster how can that be it took three hours fees a positive pressure let's look up the tensile strength of for example 304 stainless steel oh my word he doesn't understand the difference between compression and tension but fine tensile strength is how strong you have to stretch something before it breaks so in pressurizing a tube term it's how much pressure you have to put in before the tube explodes before it ruptures not quite the same thing as whether it'll actually go under a vacuum which is a familiar steel because starship steel is quite similar to it we find the yield strength of 215 megapascal and an ultimate strength of 505 megapascal great that means you can put lots of pressure into your tube before it explodes not quite sure what relevance that has to how easily the tube will collapse but keep going now this means that the steel starts deforming at 215 megapascal and completely breaking at 505 megapascal but we found that our hoop stress is only 3.5 megapascal the longitudinal stress even lower this basically means that the hype loop still could withstand 63 times more pressure than the atmospheric pressure before it would even start deforming and even 148 times more pressure until it would start breaking so yeah there you go the steel is more than strong enough to withstand the external atmospheric pressure without problems yes congratulations the hyperloop would be able to take a lot of pressure on the inside of the tube when the structure would be intention under compression not quite so much the even dumber thing of course is even my aluminium can here didn't actually reach the tensile strength of aluminium this way for thin sheet of aluminium even though it was under a total vacuum completely crushed of course but there was no rupture in the actual aluminium anywhere these actually held the vacuum so i guess i guess this would be this way for thin aluminium would also in his mind be a perfect material for making the hype loop out of because it can take the stress as well so yeah there you go the steel is more than strong enough to withstand the external atmospheric pressure without problems it sometimes helps to do a bit of physics you know oh boy oh boy or alternatively you would just look at things like tanker collapses right so he's going to claim that the or one inch thick steel it's about 25 millimeters is about a hundred times thicker than it needs to be so let's just be generous and say that a millimeter thick steel would actually be perfectly good enough to hold a vacuum in his mind let's take a look at some vacuum collapses shall we it sometimes helps to do a bit of physics you know however while there are some very dramatic demonstrations of things under vacuum being crushed by the atmosphere and this is basically releasing that energy that i was telling you about earlier there was however a mythbusters experiment that showed that a tanker truck and a vacuum can be stable that's the sound of disappointment ladies and gentlemen these tank cars are actually pretty tough little bastards that's until i put a dent in the tank truck and then boom it sometimes helps to do a bit of physics you know and now comes our favorite argument which we find kind of hilarious honestly he says that if there's a rupture in the hyperloop pod the people inside the part would brutally suffocate okay so the people working at those hyperloop companies are total idiots like well i'm not sure about that but the geniuses who worked on the elon musk hyperloop didn't realize the iron rusts when it gets wet what do you know companies are total idiots like who never heard of a safety system right and also the air inside a pot just instantly vanishes in a split second if there is a leak in the pod actually yeah that's about right you see it turns out gas molecules travel at about the speed of sound so if all of a sudden they're not actually being held by a wall or something they vanish at about the speed of sound which means you can get an awful lot of gas through a fairly small hole now i mean just as an example from this video alone you'll recall that the pressure that i had in my little coke can here was three atmospheres so when i make a small hole in the system by unplugging it from the pressure system all the pressure all the gas has to go through that tiny hole for it to equilibrate from three atmospheres to one atmosphere how long do you think this is gonna take that's really getting hard to push so that's three bar okay so the people working at those hyperloop companies are total idiots like who never heard of a safety system right now let us take a look what the white paper has to say about this the white paper all praised to the white paper for example page 54 section 4.5.2 in the event of a minor league the onboard environmental control system would maintain capsule pressure using the reserve air carried on board for the short period of time it will take to reach the destination well actually if the leaks are small enough you don't even have to do that in the case of a more significant depressurization oxygen masks would be deployed as in airplanes yes he is legitimately parading elon musk's ignorance of how gases behave in a vacuum sit down kid now explain to you why the white paper is dumb you see you can only breathe if the pressure on the inside of your lungs is the same as the pressure on your skin awesome so at the moment i don't have any problems breathing and the reason i don't have any problems breathing is because the pressure of the air that's pushing on my lungs and the pressure was pushing on the outside of my chest is exactly the same which basically means there's no real resistance to me breathing beyond the viscosity of the gas yes i can breathe out and this is it requires almost no force whatsoever however that's not universally true say for instance my body was exposed to a vacuum and i needed someone to feed me a certain gas pressure of oxygen such that i can still survive i need a certain minimum pressure of oxygen going to my lungs without that i can't survive now fortunately i don't have to do this in a vacuum because we only need to know what's the difference in pressure between what pushes on the outside and what i can exert with my lungs and we can do this in two ways the first one is if the pressure on the outside of my body is higher than the gas that i'm breathing there comes a point when it's going to squeeze the breath out of me and i can't breathe in anymore this is like you know bunny getting constricted about a snake or something apart the same thing just works if it's gas pressure if you have more gas pressure pushing on the outside then you have going into your lungs you just can't breathe them anymore and likewise you get the opposite effect which is when there is more gas pressure going into your lungs than is pushing on the outside you just get blown up like a balloon that comes appointment you you can't breathe out anymore so how can we get an estimate of that well fortunately i have a little pressure meter here who currently says uh this is atmospheric pressure here which is about well one thousand millibar is one atmosphere and so i can see what sort of pressure difference i could still blow out at by seeing what's the maximum pressure i can get with my lungs and likewise i can do the opposite what's the uh the minimum pressure i can still breathe in that by seeing how hard i can suck okay blowing first and it does that that's genuinely if you're blown with your language you are doing really well if you can get up to 1.1 atmospheres uh 100 millibars extra pressure exerted with your lungs and likewise let's see if we can do that the opposite let's see if we do that in suction right so awesome you can just about handle a difference between the pressure on the inside of your lungs and what's pushing on your body of about a tenth of an atmosphere beyond that you either can't breathe in because there's too much pressure squeezing it out of you or you can't breathe out because there's too much pressure going into your lungs now if you're in space obviously the pressure pushing on the outside or in the vacuum the pressure on the outside of your body is zero so what's the minimum air pressure you actually need to live and it's about 0.2 atmospheres right 0.2 atmospheres of oxygen is what you need to live so if you're in a vacuum there without a pressure suit to help squeeze your body a bit there is no way that you would be able to survive decompression like this because even if i give you a gas mask that perfectly fits over your mouth that feeds you pure oxygen all it's going to do is blow your body up and you will never be able to breathe out because there is gas pressure being fed into your lungs it's blowing up like a balloon and you do not have the strength in your lungs to push it out again he then says that in a plane oxygen masks would be deployed in case of emergency which would not be the case in the hyperloop wrong wrong as we said before on page 54 section 4.5.2 it is written the white paper the white paper all glory to the white paper it is written in the case of a more significant depressurization oxygen masks would be deployed as in airplanes yeah when you're in a plane at altitude the atmospheric pressure outside is about 0.2 atmospheres but it's regular air so it's 80 nitrogen 20 oxygen so there's not a lot of oxygen there so you need to get more oxygen but yeah i can apply more pressure to the body very easily so what you do is you get a mask that supplies about 0.2 atmospheres of oxygen and then you just breathe pure oxygen and because the pressure on the inside and the pressure on the outside is the same you can breathe that fine yeah i can't do that in a hyperloop because the oxygen will diffuse away before you can breathe it in remember gas in a vacuum diffuses away at about the speed of sound alternatively if you stick the mask to someone's face it just blows them up like a balloon in the case of a more significant depressurization oxygen masks would be deployed as in airplanes i suppose you could say that the whitepaper does address how you will deal with pressure loss in a port just in a way that demonstrates that the authors don't understand the fundamentals of how human lungs work or gases in vacuums behave then it gets even better at 10 minutes 38 seconds thunderfoot says any failure whatsoever will rip through the hyperloop tube like candy the yes even medium-sized bullet will go through the inch thick steel of the hyperloop tube the pod well he's about 30 tons and he's going at about the speed of sound any sort of crash at that sort of speed will go through an inch thick steel like it wasn't there i mean to give you a feel for what something crashing at 500 miles per hour looks like some time ago whilst testing walls for nuclear reactors a u.s research lab decided one of the best ways to do this would be to accelerate a phantom jet up to about 500 miles per hour and crash it into the wall now sure this is actually a head-on crash but it does give you a good feel of the energies that you have to dissipate yeah i think we might be slightly beyond airbags and seat belts here further it's obvious this is going to create a significant debris field that when the tube is ruptured will be launched down the tube at about the speed of sound about the speed of a bullet because that's about the speed the air will enter the vacuum tube so it's really not going to make any difference whether the next capsule down the pipeline has got its brakes on or not it's still bad news bears that's important for later he goes even further seeing any rapture in the tube would lead to a catastrophic failure of the entire hyperloop tube because air would enter at the speed of sun destroying all passenger parts in its way yep that's 100 correct even a little hole you can get a lot of gas going through so that's three bar you rip a giant hole in the hype loop it will decompress like it's going boom well first of all we showed that the structural integrity of steel is much much higher than what is actually required so a leak or a rapture is extremely unlikely what you think that because the tube can hold a vacuum that somehow means that it can now withstand a pod that weighs about 30 tons traveling at the speed of sound disintegrating within the tube not quite so sure that holds up as a line of reasoning but okay let's just say that a rapture would happen due to some extreme external events such as a terrorist attack or a meteorite hitting the tube or a failure on the capsule of some sort in that case air would indeed enter the hyperloop tube at high speeds but this cannot be compared to a bump explosion as thunderfoot puts it actually that's exactly what it can be compared to it's a difference in pressure traveling at about the speed of sound or if you wanted something where you can extrapolate from something that's more day to day this man is merely trying to stand up in winds gusting at about 100 miles per hour so let's say 60 mile per hour winds the wind coming down the hyperloop is traveling at about the speed of sound about 600 miles per hour that sort of thing so six to ten times faster than the wind this guy is trying to stand up in which is why with a pressure wave significantly weaker than the one that the people in the hyperloop are going to get hit by and just for frame of reference one atmosphere is about 15 pounds per square inch so at 10 pounds per square inch about two-thirds of an atmosphere of a pressure wave you can get things like limbs blown off severe heart and lung damage and reinforced concrete buildings severely damaged but this cannot be compared to a bump explosion as thunderfoot puts it an explosion shockwave is highly compressed air well actually it mostly goes on pressure differentials so what's it like getting hit by a pressure differential of one atmosphere well let's take a look at it this way atmospheric pressure is about 10 tons per meter squared about the size of a reasonable track and that one atmosphere pressure wave coming down the tube towards you is coming towards you at about the speed of sound the only redeeming feature here is that air gas is pretty compressible stuff but you can still expect it to kill pretty much anything it hits i mean you get a rough idea of what a one atmosphere pressure wave will do from some nuke benchmarking tests blasts from airbursts where overpressure exceeds 10 psi can cause substantial damage to destroyer type ships above 14 psi it could even result in hull rupture flooding and sinking the shock imparted by blast to the superstructure can damage or carry away equipment at greater distances over pressure above six psi can distort rupture and carry away light structures and equipment interior equipment and compartments may be damaged by the blast collapsing deck structures or bulkheads over pressure entering through openings can damage boilers blast injuries to exposed personnel represented by this dummy is usually severe over three psi here it was 6 psi over to our elon musk fans to see how they're going to reinvent physics to conform with the white paper an explosion shockwave is highly compressed air whereas the air entering the hyperloop tube enters a medium vacuum oh yeah a medium vacuum where only 99.9 of the air has been removed i'm sure that will make a huge difference but apparently in the fantasy land that you have to live in to make the white paper all hail to the white paper to make the white paper a document written by a genius it will what you're about to witness is probably one of the most surreally bizarre fantasies about how gases in vacuums behave that i've seen anywhere a medium vacuum it would thus disperse much much more that means that we would see the colder air sink to the bottom in the tube going first with the warmer air being on the upper side of the tube and coming later therefore the so-called shock wave wouldn't become a shock wave as in the case of a bomb but more are gradually increasing wind yeah a gradually increasing wind traveling at the speed of sound i mean this is just so surreal on every level like gas molecules travel at about the speed of sound which means that if they're given a vacuum something where there's nothing to collide with they travel into it at about the speed of sound so they would go from the bottom of the tube to the top of the tube in milliseconds right you're not going to get any gradation of this in any way shape or form then even more surreal right cold gas molecules the thing that separates cold gas molecules from hot gas molecules is cold gas molecules move slower and where does she have her cold gas molecules that means that we would see the colder air sink to the bottom in the tube going first with the warmer air being on the upper side of the tube oh they moved the furthest that's that's amazing the slow moving things travel the furthest i think i can see why you think that the white paper is a brilliant document second we can read on page 55 of the white paper all hail to the white paper section 4.5.4 in the event of a large-scale leak pressure sensors located along the tube would automatically communicate with all capsules to deploy their emergency mechanical braking systems well i don't know about you but i'm completely sold that that solves all of the technical problems with tube failures completely addressed one last question um jigsaw and sebastian did you invest heavily in theranos on page 15 of the white paper the dimensions of the pot are given by 1.35 times 1.1 meters so the surface area of a pot would be 1.4 square meters all glory to the one again now wait a sec 1.4 square meters have you any idea how small that is for a form of transport using these pods the ones that in this genius document they could have cross-sectional 1.4 squared let's just compare that to the size of a normal human so let's get a human up here humans are about on average about 1.7 ish meters so for their hyperloop pod to have this cross section it's going to have a diameter of about 1.3 meters yes but some yoga lessons might be required to take a ride in a hyperloop now actually now wait a second let's check this out versus someone sitting down now on the bright side there's technically two centimeters about one inch of potential headspace there doesn't quite leave that much space for the uh emergency air masks that are gonna drop down from above though and that i'm gonna call it quit for the moment because believe it or not i'm only halfway through their epic tome of stupidity the epic tome that is zikwan and sebastian now if you want me to nail the rest i'll be more than happy to just leave a comment below and while you're at it maybe drop a like on the video however i am going to cover one thing that they actually get correct and now i do all the calculations myself on these things usually from first principles double triple check usually do it from different approaches just to check that everything is in the right ballpark but occasionally numerical errors do slip in there so in this case it's off by a factor of 10 because i simply didn't convert between an acceleration of meters per second per second and g's now if an error like this was significant i would take the video down because i care about that sort of thing in this case not so important because it makes no difference if you've got a wall of air full of debris coming towards you with the speed of sound but nonetheless i did actually in the original video correct this with annotations but youtube has since apparently faced them out now our heroes here you know it's actually noted lots of times in the comments but whatever you get the fact that the numbers are off by a factor of 10 but don't actually spot where the factor of 10 comes from you know because we're dealing with smart people here so they actually plod through the entire calculations to get the exact same numbers i do and say well they're off by a factor of 10. but weren't smart enough to work out where the factory tank came from anyway whatever i just wanted to make sure that i covered that that is actually something that is that's in their video that is actually correct uh now i scroll down to their comments and now i'm really tempted to do part two simply because smart and smarter here were going through and favoriting comments saying yeah i hate thunderfoot and what's this thunderfoot is wrong about everything i've ever seen him make an argument on favorited by dick swann and sebastian remember you wanted this yeah so if you want to see part two make sure you hit subscribe and if you really like the work of this channel and want to support it directly you can do it through patreon and thanks for watching you

Channel: Thunderf00t

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Length: 49min 13sec (2953 seconds)

Published: Fri Dec 04 2020

Reddit Comments

[u/CommonSenseSkeptic]

We've been waiting for this rebuttal for months - these two started off objectively and went off the rails VERY quickly to become absolute sycophants for Musk. They USED to question the claims about StarShip, then changed to become parrots for all the drivel that spews from Musk's piehole.
Good job, Phil, and looking forward to Part 2!

[u/SirKeplan]

All glory to the white paper

[u/PriorCommunication7]

The part about the temperature differential across the tube is some poe's law level shit. The cringe got so bad I made a bunch involuntary grimaces during it.

Given that it's almost impossible to get thermal expansion wrong in that weird and convoluted way they probably started with the premise: Elon is right, thunderf00t is wrong, how can we make a sciency sounding argument here?