I'm an engineer myself, so I checked the G force calculation for you. I re-watched the footage and estimated the Roci turned through 115 degrees in 2 seconds, however the clip shows the Roci already moving, so estimated it to turn through 145 degrees over the whole manoeuvre. Using the same 40m crew radius assumption, I get... Forces from rotational burn = 3.27G So still high, but not quite 20G! Brilliant channel I must say, fascinating on both the quality of the TV series and the science of space!
This also assumes that the bridge is not centrally located within the ship, making the spin point very close to the seated occupants, which would make sense for a ship that needs to make quick manoeuvres. Excellent work from both of you :)
@@Awol991 not necessarily. Roci possess efficiency-running Epstine drive - mumbo jumbo aside it was shown to be able to keep Rocinante in constant 8g acceleration (during the Eros chase) and it was said it could do even more (but it would kill the crew). It can also cross vast distances of Solar system in permanent 1g acceleration with no refueling (though it was more common to go with 1/3g since it was "more economic" and more comfortable for the crew). (I might have the exact numbers wrong now, but it doesn't change the point) That means Rocinante doesn't have problem with fuel - or better said maneuvering is not going to influence its fuel reserves in any significant way. In that case it could easily use rear and end mounted maneuvering engines to spin with center of rotation different from its mass center, spinning around the bridge or any other desirable point (even outside it's hull).
For the holographic display, it should be noted that we already have holographic displays like that but are already untethered such as the Microsoft HoloLens which is what resembles the one in this show the closest. In fact, they're almost functionally the same.
True. I actually have a hololens. It's an AR device with a projection screen, the one in the show is an in air hologram or projection. We see the capability fairly routine in side projections from hand terms, pads and nav displays. It's actually kind of interesting given that we've seen the advance holographic nav displays used in later episodes that tethered headsets exist at all in that world. Maybe you could reason away that it interfaces with some kind of cranial implant.
The "injection thru the suit" is according to book canon most likely a tool used to emergency disassemble the power armor. It may emit a short-range signal that blows the armor off of the body so that the wounded is more accessible, and easier to transport.
I subbed to your channel so fast a few days ago. This is one of my favorite channels now. Production is good, audio is acceptable and the science is strong.
This is a great show and I'm loving it, only wish I would have started watching it sooner. I'm up to season 3 now and I just want to say it's really nice to watch these afterward. You do an incredible job. Thank you. I'll be back for more as I progress through all of them.
It's good to see the apostrophe! I discovered your coverage of the Ganymede mirrors when I hunted for The Expanse, and both episodes are fascinating. Thank you -- you've given me even more appreciation of the show. I will be checking back to see what you cover next. #TheExpanse
Watched all three. Great work man! You come up with answers to a lot of the stuff I've wondered about, and it makes me love the show even more when I see how much effort they've put into staying true to the laws of physics.
Subscribed! Can you please do the rest? As every episode Expanse is worth a dedicated video. The show is so good. And you are doing it so well. #Expanse
Replied above, definitely planning on it. After we get through the this season I'll likely go back adn do a highlights show for previous episodes or likely several. Thanks for watching.
Perfect. Something to look forward to every week. I like your style...are you working in the field? Regarding the 20g, what about that white fluid they are taking? Perhaps that helps in alleviating the pressure and pain? We see it being used few times until now, including some scenes of this season. if you find time, perhaps you could cover few past episodes where such situations are presented? Beside the highlights.
Thanks. I definitely intend to comment on 'The Juice' but wanted to wait for an episode that features g forces in a big way like back in the Eros episode. Same with the fusion drive itself.
I always thought the bridge of combat ships (with the exeptions of large capital ships which wouldn't be turning very quickly anyway) would be better placed at or near the centre of mass so that high speed rotational manuvers would have a minimal impact on the command crew.
About the shape of the ships- Well, the elongated shape is mostly because all the ships are built like skyscrapers for a very practical reason, other than fighting in space: They only have gravity while accelerating! so the people inside stand with their feet toward the thrusters when they have thrust. Halfway around the trip the ship will have a short time where there is no gravity while the ship rotates the other way and than accelerates the other way, slowing down, so they have gravity again. Notice people always climb up to the ship's bridge because its always the "top floor" in the ship. About the calculation of the G force- I actually have a degree in Physics but I didn't take the time to calculate this, so nice of you to do this :) but you should take into consideration the fact that these stations almost always have less than 1g, in the books at least, its usually a 1/3g, because a lot of belters are staying there, and they simply cannot be in a full 1g for a long time, so this maybe changes your result there.
Another reason for shape is to reduce your sensor profile when nose or tail towards your opponent. Also why Railguns and PDCs are on sponsons or retractable mounts is so the can fire around the ship, the retractable mounts reduce sensor profile when stowed.
True, that's the statement in the books but we don't know that maps to the show. The speed might differ but it would fall away at some noticeable rate. Not a problem at all, they are trying to communicate to the viewer what is going on so putting the station and the ship in the same frame is kind of necessary to avoid confusion.
Yeah - good point -I think there's a show canon thing going on where they're picking bits of the science to use: Ceres was clearly shown with around 1G and the Roci appears to either be on the float or under approximately 1G, whereas the books say repeatedly about 0.3G being comfortable for Naomi. I should have said - well done - this is a fab video.
Yea. I find that interesting because, 0.3 g is a frequently used value in the books. That makes Mars gravity the system standard for gravity more or less. My next show is going to go into living in lower G environments more since it'll feature ground scenes on Ganymede and that has a lot of interesting implications. For the TV show, there is only so much they can do with special effects so a lot of the reality of moving in lower G isn't going to be something they can show. As a writer it just takes a line but as a TV show it would take many thousands of dollars in special effects and honestly, most of that would be lost on the audience since none of us really know what it looks like to move in low G. The moon landing was a bad example of that as I mentioned because their movement was as much a function of the restriction of the suit as it was of the gravity.
I've always assumed that the gravity on Tycho station, Ceres, and accelerating ships (when they're not in a hurry) is about 0.3g, as it is in the book. Early in the first season they show a Belter being "gravity tortured" on Earth. If places like Ceres and Tycho operated at 1g, this wouldn't happen.
The discrepancy in G we see on the show is probably just for filming. The entire series can't be shot in a vomit comet, though they do offer good hints at low G when they can.
the radiative energy is irrelevant. the main cooling factor of a liquid in space will be evaporation. basically as the blood would spray out it would first evaporate, evaporation is an endothermic reaction and uses a lot of energy that why when you get out of the shower it will be suddenly cool because the water on you start using the heat of the body to evaporate. as the blood cools from evaporation it will eventually freeze, freezing is exothermic but not nearly to the point as evaporation is endothermic, forming solid blood. for me what is much more questionable is the snow flake shape because snow flakes are produced with almost pure water , done with extremely fine droplets and freezes at a relatively slow rate. in fact snow cannon do produce snow flakes but tiny ice spheres with imitates compacted snow. even if the last two condition where for snow flake to form, crystallization is very dependent on composition, if you frozen salt water it looks very different from pure water, so the snow flakes would still be very unlikely. for the human body on the other hand, the human body is perfectly capable of containing it liquids in a vaccum except around area like the lungs, the eyes and maybe the gut (i'm not sure if our trachea and our colon is strong enough to contain the pressur) which are moist . this make evaporation a far more minor contributor to the cooling process thus why the prediction mainly take radiative energy into account.
Thanks. It's my first show so a bit raw. I'll work on the production quality a bit in future shows. Going to do a show every Monday. Next will likely be on the next episode of The Expanse as well. It looks like there will some interesting commentary on what it takes to grow food in space and a bit more on Ganymede.
I plan on doing the remaining episodes of the season. My original idea was to do a show entirely on the science of the expanse but with only a few episodes left in the season that content would run out quickly. So I expanded the idea to all media and news in general (I have a show on Logan to do). After I get through this season episodes I'll likely to a Expanse Science Highlights of the previous episodes. I'm dying to do one on the belter who opened his visor etc.
Just watched this episode this week. The 'injection' didn't appear to be medical to me. The guy punches the tool into the side of the suit, steps back, tells his colleagues to 'stand clear' and then you hear an explosive 'poof!' sound (well the character inside the suit does). I had assumed the tool had blown the suit into some sort of pressurized balloon. I though this was to turn the suit into a kind of stretcher that immobilizes and protects the patient while you recover them to a pressurized environment for first aid. Of course the suit had holes in it, so beats me how would seal when inflated. Maybe it is a bunch of overlayed folds, so that when 'blown' the folds flop over and seal against the adjacent area, so each part of the material would seal the area next to it, automatically sealing minor breaches.
Water exposed to vacuum would boil, or evaporate, and when it does so, it will take the energy of vaporization with it, causing the temperature of the remaining liquid to fall. As a chemical engineering student, we accidentally froze the surface of a vessel of water by allying a vacuum. Prof was not pleased. #TheExpanse
Yea, there are some great videos posted like that. It depends on an amount of water to be left to cool, so water on the eyes and tongue would just boil away. Thanks for watching!
Seems like it, though to operate it space it would have to have some interesting properties. Not only durability but some sort of self healing ability would be vital.
#TheExpanse I just found your channel & Im thrilled! I really appreciate their attn to legitimacy. Naren Shankar is an exec prod with advanced PhDs in Applied Physics & Electrical Engineering, so I’m guess that comes in handy! (If this was S1E4, I’d make a “These are the hallmark skills of a terrorist.” joke LOL Thanks for this video! Fantastic! Now that I’ve found your channel, I’m gonna be rummaging through your other vids! Great job!!!! If this was your premier? You knocked it outta the park!
I didn't like how they shown the Roci and that other ship detaching from Tycho, turning and quickly accelerating. Seemed too unrealistic for that kind of show, especially if you compare that to great scenes like Cantenbury turning around from episode 1 of season 1. Anyway, nice analysis. I subscribed for more.
It's something I noticed but mind myself. As I mentioned, nobody wants to see a 10 minute undocking sequence. I should go back and do the math on the Cants flip sometime, I wonder what the forces would be there. How would you like to see it expressed in the show that keeps it feeling real but is workable for the series?
Why go for extremes? No need to 10 minutes sequence. Just few second, showing that ships obey centrifugal forces, need some time to stop, turn, accelerate. Not just flying like an X-Wing. I think that small details and scenes like a bird flying in low-gravity, showing how Coriolis force affects filling a glass on Ceres, Diogo jumping off Eros, Cant flipping, blood snowflakes etc. help to elevate The Expanse from good to great.
I think the big overlooked (intentional or not more on that later) thing about future combat is that humans likely wouldn't be all that involved in it. We already have very sophisticated AI and algorithmic systems for engaging in combat. Not long from now we'll be building the first fighter aircraft that are drones because we can engineer fighter aircraft that can maneuver swifter than humans could realistically survive and stay mentally alert during combat situations. That would only become more prevalent in the time of the expanse. Now granted this might be very difficulat to make interesting from a story telling perspective, but I think it's an interesting thing to think about from a scientific perspective. The expanse probably wouldn't involve so many human combatants.
You'd almost think military suits would have 360 degree IR Blasters for short range and backup communication. Subcarriers might be used to support differentiable audio channels for individuals.
10:49 If the ship is uncoupled, why would it continue to accelerate away? My thought is, assuming no thrust correction, it would only be moving at the tangent to the ring's rotation. If you spin around with your arms out and release a ball it doesn't accelerate away from you, but moves at a constant velocity. Of course, WHILE you are holding on to it, it experiences that acceleration.
i can remember in some episode when they fought against Mao's troops. they had high tech armor that was self sealing. remember one guy got his arm cut off and suit sealed itself. Bit late to commenting but good video anyway
4:58 - maybe it's actually "life time" of the whole device? Maybe it uses so little energy, the whole device can "live" (for example) 2 years and then you just switch the "sim-card" to the new device. Maybe it's not that expensive to have something like this in the future so, the device can actually be used only once and then you buy another one - you just switch your data by using the "sim-card" - or whatever it will be in the future? :)
About the spin at ~12:00, I don't see the point of trying to calculate the acceleration without knowing the distance of the axis of rotation to the 2 crew members. From all we know, it's a clever ship and the rotation is performed around the pilot's and copilot's seats, so there would not be any significant centrifugal acceleration.
I've only marathoned through the expanse over the past couple of days, because science (kyle hill), and I think that at around 10:00 in the video you mentioned the holographic head mounted display, but you forgot to mention another great visual display tech of the future, the mega ultra ultra wide monitor sitting on his desk, probably still made by LG whuknows
about the blood: considering the amount of heat that gets disapated by boiling, radiation is irrelevant. The blood we see is cooled by boiling to the point of freazing.
3:59 I don't think that is an injection. In the book, they talk about how they use something to blow her armour off so they can treat her. I think that is the tool they use.
Could it be that an important part of the discussion is missing? If a liquid evaporates or a solid substance sublimates, a lot of heat is extracted. Since the low pressure causes water to evaporate more quickly or ice to sublimate, this must be taken into account. The body consists to a large extent of water and the skin is not dense or strong enough to prevent water from escaping from the body in a vacuum. So you could freeze the surface quite quickly if the moisture of the skin evaporates. Of course, this only applies to bodies without a space suit. A person in a space suit cannot of course give off heat through evaporation, because the vapour remains in the suit. Then only the IR radiation is there to cool down. I don't know if blood can form such crystals at all. But generally the formation of crystals is made more difficult by contamination of the substance. Then smaller crystals with less beautiful form are formed. This is because too many crystallisation nuclei are present in a contaminated substance. Blood contains many solid components. A snowflake usually has exactly one dust particle in the middle, where the subcooled liquid starts to crystallize. I suspect that the blood cannot take on this snow crystal form. Translated with www.DeepL.com/Translator
What happens to the temperature of a gas as it expands into the vacuum? PV=nRT. P-> goes to zero, V->goes to infinite. But what is happening faster? Does the Temperature of the gas and embedded droplets go up or down? I would think the expansion related cooling would win out over radiative cooling in the short term.
#TheExpanse Great video. I hope you can go into more detail about those pills! That is really cool and it is a frequently discussed subject in some of the groups I am in.
I have to comment this somewhere, why not here. That ship, the Rocinante, as it left the dock it turned in a Y-turn formation like a car exiting a parking space. I mean, why? And I've seen this a lot in Sci-Fi. Ships turning in Y-turns and it never made sense to me. Think about it, a car can only move in two dimensions so of course it'll do a Y-turn. But a spaceship can move backwards and then turn in the third dimension, around an axis diagonal to its length. Is it clear what I'm trying to say here? The Roci moves, stops, and then moves again. It wastes time and fuel to move and stop and move to do the Y-turn. Why didn't it just push backwards from the docks, then flip around mid-flight. Turn off every thruster, the ship still keeps moving in a straight line. Fore (the "nose" of the ship) goes down, aft (the "tail") goes up. It does a 180° turn mid-flight. When the ship is positioned parallel to its flight course again, fore now facing forward and aft towards the station, they can turn on the main drive and accelerate. It's a small thing but it always bothered me that sci-fi spaceships do things like cars do on ground or the way airplanes do it in the atmosphere while these ships are actually not bound by the things that cars and airplanes are.
Was it ever made clear where the bridge on the Roci is? If it was placed near the center of the ship, wouldn't that solve the problem of high g during rotation? Also just found your videos but great work! I'm really enjoying them.
Thanks for watching. It's fairly clear. The show fits the book description. If you go through the airlock at the center part of the ship you have to go up several flights of stairs.
MusikCassette it should be actually, since in Expanse those ships are built like submarines, and subs have the bridge in the middle, with weapons in front and engines behind. So yeah, it should be in the middle, that makes sense
Thanks for watching. Right now I think it's likely I'll just go back to specific topics rather than past episodes. Once the season wraps up I have some plans for things like talking about the science behind spinning Ceres, Terraforming Mars, Epstein drive and the like. I am mostly trying to get use to editing enough to produce 2 shows a week and expand to other current shows, movie and news. I Have episodes right now planned for Logan, Elite Dangerous, Life and Mass Effect Andromeda too.
5:44 I think that scar is actually from having his OPA neck tattoo removed. Maybe he was disgraced and they burned it off him by force at some point in the past.
I wish he would have mentioned that if a blood droplet did freeze, it wouldn't look anything like a snowflake. The mechanism that makes snowflakes look how they do is much more complex than just a frozen droplet of water or blood.
In the show, they sort of "speed" up the way the ships move as well as compress the distances, simply because audience members won't sit around and wait for things to get from A to B, and having the action being interrupted with a caption saying "15 minutes later", or "20 hours later" would get kind of old. In the book - they basically talk about how getting from A to B often takes a LOT of time.
Yea, particularly keeping the action of the show linked up and flowing between Earth, Ganymede and the Ships, it's a difficult thing. They'd have to start a story in space an episode or two before the ground action or use that cut with timelaps as you say and that would get fairly weird for the viewer.
I think it's neat to discuss this sort of thing about sci fi shows and films, but it becomes ridiculous when an almost cult like status of science lovers now demand everything be as scientifically accurate as possible. Trek isn't great because of the sci fi aspect. It's great because of the philosophical debates it raises. Star Wars is the best at drama and artistic quality. Expanse is great, not for it's adherence to science but the characters. Without Miller, Drummer, Ashford, Alex, Naomi, or Holden, this show would suck despite having more accurate science details. It irks me to no end that I can't watch a sci fi video on youtube now without the little science cultists constantly nitpicking the "science" of Skyrim, Fallout, Resident Evil, Empiryion, Star Wars, Trek, etc. :{
Why are you talking about blood / liquid boiling in a vacuum, and showing something that seems to be liquid, maybe boiling, but under different gravity forces? Pressure isn't gravity, you can set any pressure in a ship, even if it's not submitted to 1g gravity. Then you flash thermal diagrams and curves without any legend, I'm not sure what to make of this, there is no science without some degree of methodology.
I'm an engineer myself, so I checked the G force calculation for you. I re-watched the footage and estimated the Roci turned through 115 degrees in 2 seconds, however the clip shows the Roci already moving, so estimated it to turn through 145 degrees over the whole manoeuvre. Using the same 40m crew radius assumption, I get...
Forces from rotational burn = 3.27G
So still high, but not quite 20G!
Brilliant channel I must say, fascinating on both the quality of the TV series and the science of space!
Excellent, thanks!
This also assumes that the bridge is not centrally located within the ship, making the spin point very close to the seated occupants, which would make sense for a ship that needs to make quick manoeuvres. Excellent work from both of you :)
Smart design would have the main control cabin at the centre of rotational mass to minimize the rotational forces on the command crew.
@@Awol991 not necessarily. Roci possess efficiency-running Epstine drive - mumbo jumbo aside it was shown to be able to keep Rocinante in constant 8g acceleration (during the Eros chase) and it was said it could do even more (but it would kill the crew). It can also cross vast distances of Solar system in permanent 1g acceleration with no refueling (though it was more common to go with 1/3g since it was "more economic" and more comfortable for the crew). (I might have the exact numbers wrong now, but it doesn't change the point)
That means Rocinante doesn't have problem with fuel - or better said maneuvering is not going to influence its fuel reserves in any significant way. In that case it could easily use rear and end mounted maneuvering engines to spin with center of rotation different from its mass center, spinning around the bridge or any other desirable point (even outside it's hull).
In Which direction is the station spinning
For the holographic display, it should be noted that we already have holographic displays like that but are already untethered such as the Microsoft HoloLens which is what resembles the one in this show the closest. In fact, they're almost functionally the same.
True. I actually have a hololens. It's an AR device with a projection screen, the one in the show is an in air hologram or projection. We see the capability fairly routine in side projections from hand terms, pads and nav displays. It's actually kind of interesting given that we've seen the advance holographic nav displays used in later episodes that tethered headsets exist at all in that world. Maybe you could reason away that it interfaces with some kind of cranial implant.
The "injection thru the suit" is according to book canon most likely a tool used to emergency disassemble the power armor. It may emit a short-range signal that blows the armor off of the body so that the wounded is more accessible, and easier to transport.
I subbed to your channel so fast a few days ago. This is one of my favorite channels now. Production is good, audio is acceptable and the science is strong.
This is a great show and I'm loving it, only wish I would have started watching it sooner. I'm up to season 3 now and I just want to say it's really nice to watch these afterward. You do an incredible job. Thank you. I'll be back for more as I progress through all of them.
It's good to see the apostrophe! I discovered your coverage of the Ganymede mirrors when I hunted for The Expanse, and both episodes are fascinating. Thank you -- you've given me even more appreciation of the show. I will be checking back to see what you cover next. #TheExpanse
The neck scarring could also be a reaction from having substandard metals pressed against your skin for extended periods of time.
Watched all three. Great work man! You come up with answers to a lot of the stuff I've wondered about, and it makes me love the show even more when I see how much effort they've put into staying true to the laws of physics.
Subscribed! Can you please do the rest? As every episode Expanse is worth a dedicated video. The show is so good. And you are doing it so well. #Expanse
Replied above, definitely planning on it. After we get through the this season I'll likely go back adn do a highlights show for previous episodes or likely several. Thanks for watching.
Perfect. Something to look forward to every week. I like your style...are you working in the field? Regarding the 20g, what about that white fluid they are taking? Perhaps that helps in alleviating the pressure and pain? We see it being used few times until now, including some scenes of this season. if you find time, perhaps you could cover few past episodes where such situations are presented? Beside the highlights.
Thanks. I definitely intend to comment on 'The Juice' but wanted to wait for an episode that features g forces in a big way like back in the Eros episode. Same with the fusion drive itself.
I always thought the bridge of combat ships (with the exeptions of large capital ships which wouldn't be turning very quickly anyway) would be better placed at or near the centre of mass so that high speed rotational manuvers would have a minimal impact on the command crew.
My 1st of your videos. Very well explained and observed. Subbed and viewing the rest. Thumbs up
About the shape of the ships- Well, the elongated shape is mostly because all the ships are built like skyscrapers for a very practical reason, other than fighting in space: They only have gravity while accelerating! so the people inside stand with their feet toward the thrusters when they have thrust. Halfway around the trip the ship will have a short time where there is no gravity while the ship rotates the other way and than accelerates the other way, slowing down, so they have gravity again.
Notice people always climb up to the ship's bridge because its always the "top floor" in the ship.
About the calculation of the G force- I actually have a degree in Physics but I didn't take the time to calculate this, so nice of you to do this :)
but you should take into consideration the fact that these stations almost always have less than 1g, in the books at least, its usually a 1/3g, because a lot of belters are staying there, and they simply cannot be in a full 1g for a long time, so this maybe changes your result there.
Another reason for shape is to reduce your sensor profile when nose or tail towards your opponent. Also why Railguns and PDCs are on sponsons or retractable mounts is so the can fire around the ship, the retractable mounts reduce sensor profile when stowed.
You do see self repairing/sealing space suits in an earlier episode
The gravity on Tycho station is 1/3G as stated in the books, so your assertion that the roci would fall away at 9.81 m/s is not right.
True, that's the statement in the books but we don't know that maps to the show. The speed might differ but it would fall away at some noticeable rate. Not a problem at all, they are trying to communicate to the viewer what is going on so putting the station and the ship in the same frame is kind of necessary to avoid confusion.
Yeah - good point -I think there's a show canon thing going on where they're picking bits of the science to use: Ceres was clearly shown with around 1G and the Roci appears to either be on the float or under approximately 1G, whereas the books say repeatedly about 0.3G being comfortable for Naomi.
I should have said - well done - this is a fab video.
Yea. I find that interesting because, 0.3 g is a frequently used value in the books. That makes Mars gravity the system standard for gravity more or less. My next show is going to go into living in lower G environments more since it'll feature ground scenes on Ganymede and that has a lot of interesting implications.
For the TV show, there is only so much they can do with special effects so a lot of the reality of moving in lower G isn't going to be something they can show. As a writer it just takes a line but as a TV show it would take many thousands of dollars in special effects and honestly, most of that would be lost on the audience since none of us really know what it looks like to move in low G. The moon landing was a bad example of that as I mentioned because their movement was as much a function of the restriction of the suit as it was of the gravity.
I've always assumed that the gravity on Tycho station, Ceres, and accelerating ships (when they're not in a hurry) is about 0.3g, as it is in the book. Early in the first season they show a Belter being "gravity tortured" on Earth. If places like Ceres and Tycho operated at 1g, this wouldn't happen.
The discrepancy in G we see on the show is probably just for filming. The entire series can't be shot in a vomit comet, though they do offer good hints at low G when they can.
the radiative energy is irrelevant. the main cooling factor of a liquid in space will be evaporation. basically as the blood would spray out it would first evaporate, evaporation is an endothermic reaction and uses a lot of energy that why when you get out of the shower it will be suddenly cool because the water on you start using the heat of the body to evaporate. as the blood cools from evaporation it will eventually freeze, freezing is exothermic but not nearly to the point as evaporation is endothermic, forming solid blood. for me what is much more questionable is the snow flake shape because snow flakes are produced with almost pure water , done with extremely fine droplets and freezes at a relatively slow rate. in fact snow cannon do produce snow flakes but tiny
ice spheres with imitates compacted snow. even if the last two condition where for snow flake to form, crystallization is very dependent on composition, if you frozen salt water it looks very different from pure water, so the snow flakes would still be very unlikely.
for the human body on the other hand, the human body is perfectly capable of containing it liquids in a vaccum except around area like the lungs, the eyes and maybe the gut (i'm not sure if our trachea and our colon is strong enough to contain the pressur) which are moist . this make evaporation a far more minor contributor to the cooling process thus why the prediction mainly take radiative energy into account.
Fun with science? What is this dark sorcery? Great episode. Looking forward to more. #TheExpanse :)
Thanks!
This is great! Can't wait to see what else you 'Do the Science' on!
Thanks. It's my first show so a bit raw. I'll work on the production quality a bit in future shows. Going to do a show every Monday. Next will likely be on the next episode of The Expanse as well. It looks like there will some interesting commentary on what it takes to grow food in space and a bit more on Ganymede.
please do all of the Expanse. At least the second season. As the show is soo good, and it deserve the sciencey coverage
I plan on doing the remaining episodes of the season. My original idea was to do a show entirely on the science of the expanse but with only a few episodes left in the season that content would run out quickly. So I expanded the idea to all media and news in general (I have a show on Logan to do). After I get through this season episodes I'll likely to a Expanse Science Highlights of the previous episodes. I'm dying to do one on the belter who opened his visor etc.
Just watched this episode this week. The 'injection' didn't appear to be medical to me. The guy punches the tool into the side of the suit, steps back, tells his colleagues to 'stand clear' and then you hear an explosive 'poof!' sound (well the character inside the suit does). I had assumed the tool had blown the suit into some sort of pressurized balloon. I though this was to turn the suit into a kind of stretcher that immobilizes and protects the patient while you recover them to a pressurized environment for first aid.
Of course the suit had holes in it, so beats me how would seal when inflated. Maybe it is a bunch of overlayed folds, so that when 'blown' the folds flop over and seal against the adjacent area, so each part of the material would seal the area next to it, automatically sealing minor breaches.
it is stated in the books that Tyco Station rotates at 1/3g
Water exposed to vacuum would boil, or evaporate, and when it does so, it will take the energy of vaporization with it, causing the temperature of the remaining liquid to fall. As a chemical engineering student, we accidentally froze the surface of a vessel of water by allying a vacuum. Prof was not pleased. #TheExpanse
Yea, there are some great videos posted like that. It depends on an amount of water to be left to cool, so water on the eyes and tongue would just boil away. Thanks for watching!
Possibly the suits are made out of spandex, like the Space Activity Suit?
Seems like it, though to operate it space it would have to have some interesting properties. Not only durability but some sort of self healing ability would be vital.
#TheExpanse I just found your channel & Im thrilled! I really appreciate their attn to legitimacy. Naren Shankar is an exec prod with advanced PhDs in Applied Physics & Electrical Engineering, so I’m guess that comes in handy! (If this was S1E4, I’d make a “These are the hallmark skills of a terrorist.” joke LOL
Thanks for this video! Fantastic! Now that I’ve found your channel, I’m gonna be rummaging through your other vids!
Great job!!!! If this was your premier? You knocked it outta the park!
in the book, Roci departured days ahead of the Navoo. So the book doesn't have such problem.
I didn't like how they shown the Roci and that other ship detaching from Tycho, turning and quickly accelerating. Seemed too unrealistic for that kind of show, especially if you compare that to great scenes like Cantenbury turning around from episode 1 of season 1.
Anyway, nice analysis. I subscribed for more.
It's something I noticed but mind myself. As I mentioned, nobody wants to see a 10 minute undocking sequence. I should go back and do the math on the Cants flip sometime, I wonder what the forces would be there. How would you like to see it expressed in the show that keeps it feeling real but is workable for the series?
Why go for extremes? No need to 10 minutes sequence. Just few second, showing that ships obey centrifugal forces, need some time to stop, turn, accelerate. Not just flying like an X-Wing.
I think that small details and scenes like a bird flying in low-gravity, showing how Coriolis force affects filling a glass on Ceres, Diogo jumping off Eros, Cant flipping, blood snowflakes etc. help to elevate The Expanse from good to great.
I think the big overlooked (intentional or not more on that later) thing about future combat is that humans likely wouldn't be all that involved in it. We already have very sophisticated AI and algorithmic systems for engaging in combat. Not long from now we'll be building the first fighter aircraft that are drones because we can engineer fighter aircraft that can maneuver swifter than humans could realistically survive and stay mentally alert during combat situations. That would only become more prevalent in the time of the expanse. Now granted this might be very difficulat to make interesting from a story telling perspective, but I think it's an interesting thing to think about from a scientific perspective. The expanse probably wouldn't involve so many human combatants.
You'd almost think military suits would have 360 degree IR Blasters for short range and backup communication. Subcarriers might be used to support differentiable audio channels for individuals.
10:49 If the ship is uncoupled, why would it continue to accelerate away? My thought is, assuming no thrust correction, it would only be moving at the tangent to the ring's rotation. If you spin around with your arms out and release a ball it doesn't accelerate away from you, but moves at a constant velocity. Of course, WHILE you are holding on to it, it experiences that acceleration.
i can remember in some episode when they fought against Mao's troops. they had high tech armor that was self sealing. remember one guy got his arm cut off and suit sealed itself. Bit late to commenting but good video anyway
wow your stuff is like what syfi used to do in the credits section of SEAQUEST
4:58 - maybe it's actually "life time" of the whole device? Maybe it uses so little energy, the whole device can "live" (for example) 2 years and then you just switch the "sim-card" to the new device. Maybe it's not that expensive to have something like this in the future so, the device can actually be used only once and then you buy another one - you just switch your data by using the "sim-card" - or whatever it will be in the future? :)
Cable on the VR is like GITS when they want to do private talks without wireless risks.
About the spin at ~12:00, I don't see the point of trying to calculate the acceleration without knowing the distance of the axis of rotation to the 2 crew members. From all we know, it's a clever ship and the rotation is performed around the pilot's and copilot's seats, so there would not be any significant centrifugal acceleration.
I've only marathoned through the expanse over the past couple of days, because science (kyle hill), and I think that at around 10:00 in the video you mentioned the holographic head mounted display, but you forgot to mention another great visual display tech of the future, the mega ultra ultra wide monitor sitting on his desk, probably still made by LG whuknows
about the blood:
considering the amount of heat that gets disapated by boiling, radiation is irrelevant. The blood we see is cooled by boiling to the point of freazing.
3:59 I don't think that is an injection. In the book, they talk about how they use something to blow her armour off so they can treat her. I think that is the tool they use.
It would seem that tyco is 0.3 g not 1 g
Could it be that an important part of the discussion is missing?
If a liquid evaporates or a solid substance sublimates, a lot of heat is extracted. Since the low pressure causes water to evaporate more quickly or ice to sublimate, this must be taken into account.
The body consists to a large extent of water and the skin is not dense or strong enough to prevent water from escaping from the body in a vacuum. So you could freeze the surface quite quickly if the moisture of the skin evaporates.
Of course, this only applies to bodies without a space suit. A person in a space suit cannot of course give off heat through evaporation, because the vapour remains in the suit. Then only the IR radiation is there to cool down.
I don't know if blood can form such crystals at all. But generally the formation of crystals is made more difficult by contamination of the substance. Then smaller crystals with less beautiful form are formed. This is because too many crystallisation nuclei are present in a contaminated substance. Blood contains many solid components. A snowflake usually has exactly one dust particle in the middle, where the subcooled liquid starts to crystallize. I suspect that the blood cannot take on this snow crystal form.
Translated with www.DeepL.com/Translator
What happens to the temperature of a gas as it expands into the vacuum? PV=nRT. P-> goes to zero, V->goes to infinite. But what is happening faster? Does the Temperature of the gas and embedded droplets go up or down? I would think the expansion related cooling would win out over radiative cooling in the short term.
To hope that we don't see what space combat looks like is to hope that we don't establish ourselves in space. Conflict just human nature.
#TheExpanse Great video. I hope you can go into more detail about those pills! That is really cool and it is a frequently discussed subject in some of the groups I am in.
How interesting that Kubrick had Dave face vacuum way baxk in in the 60,s ..
I have to comment this somewhere, why not here. That ship, the Rocinante, as it left the dock it turned in a Y-turn formation like a car exiting a parking space.
I mean, why?
And I've seen this a lot in Sci-Fi. Ships turning in Y-turns and it never made sense to me. Think about it, a car can only move in two dimensions so of course it'll do a Y-turn. But a spaceship can move backwards and then turn in the third dimension, around an axis diagonal to its length. Is it clear what I'm trying to say here?
The Roci moves, stops, and then moves again. It wastes time and fuel to move and stop and move to do the Y-turn. Why didn't it just push backwards from the docks, then flip around mid-flight. Turn off every thruster, the ship still keeps moving in a straight line. Fore (the "nose" of the ship) goes down, aft (the "tail") goes up. It does a 180° turn mid-flight. When the ship is positioned parallel to its flight course again, fore now facing forward and aft towards the station, they can turn on the main drive and accelerate.
It's a small thing but it always bothered me that sci-fi spaceships do things like cars do on ground or the way airplanes do it in the atmosphere while these ships are actually not bound by the things that cars and airplanes are.
Was it ever made clear where the bridge on the Roci is? If it was placed near the center of the ship, wouldn't that solve the problem of high g during rotation?
Also just found your videos but great work! I'm really enjoying them.
Thanks for watching. It's fairly clear. The show fits the book description. If you go through the airlock at the center part of the ship you have to go up several flights of stairs.
#TheExpanse
I love the show and like your channel so I guess I’ll be back for more 👍
More please
Thank you. Working on the snow for next week right now!
12:33
why would the bridge not be put in the middle of the ship?
MusikCassette it should be actually, since in Expanse those ships are built like submarines, and subs have the bridge in the middle, with weapons in front and engines behind. So yeah, it should be in the middle, that makes sense
Nice premiere. Just subbed. You gonna do past eps of The Expanse in the future? You gonna do other shows like B5 or BSG?
Thanks for watching. Right now I think it's likely I'll just go back to specific topics rather than past episodes. Once the season wraps up I have some plans for things like talking about the science behind spinning Ceres, Terraforming Mars, Epstein drive and the like. I am mostly trying to get use to editing enough to produce 2 shows a week and expand to other current shows, movie and news. I Have episodes right now planned for Logan, Elite Dangerous, Life and Mass Effect Andromeda too.
What is the temperature and atmospheric pressure of the surface of Ganymede?
Nice!
Thanks!
5:44 I think that scar is actually from having his OPA neck tattoo removed. Maybe he was disgraced and they burned it off him by force at some point in the past.
The scarring is from an electrical problem with the older suits. I believe in this episode they said this.
I wish he would have mentioned that if a blood droplet did freeze, it wouldn't look anything like a snowflake. The mechanism that makes snowflakes look how they do is much more complex than just a frozen droplet of water or blood.
## Expanse great show
Good stuff! #TheExpanse
Not burn scar but long term chafing, day after day for years
Nice video 👍
#TheExpanse
#TheExpanse Good video!
Tycho offers .3g spin gravity..
So many self-proclaimed aerospace and aeronautical engineers in this channel....
Nice video #TheExpanse.
In the show, they sort of "speed" up the way the ships move as well as compress the distances, simply because audience members won't sit around and wait for things to get from A to B, and having the action being interrupted with a caption saying "15 minutes later", or "20 hours later" would get kind of old.
In the book - they basically talk about how getting from A to B often takes a LOT of time.
Yea, particularly keeping the action of the show linked up and flowing between Earth, Ganymede and the Ships, it's a difficult thing. They'd have to start a story in space an episode or two before the ground action or use that cut with timelaps as you say and that would get fairly weird for the viewer.
It only gets old to low attention span casuals. :{J
#letsdothesci #theexpanse
Indeed
This snowflake blood does not happens in vacuum because Ganymede has atmosphere.
#theexpanse
#TheExpanse
WE never went to jupiter! this was all shot in a studio!!! lolol
#conspiracy!
if water boils in space how did thay eat drink tang on the way to the moon ha ha how do thay peee in space ha ha oops !!!!
That's not "in space" it's in a pressurized climate controlled ship interior. :{
I think it's neat to discuss this sort of thing about sci fi shows and films, but it becomes ridiculous when an almost cult like status of science lovers now demand everything be as scientifically accurate as possible.
Trek isn't great because of the sci fi aspect. It's great because of the philosophical debates it raises.
Star Wars is the best at drama and artistic quality.
Expanse is great, not for it's adherence to science but the characters.
Without Miller, Drummer, Ashford, Alex, Naomi, or Holden, this show would suck despite having more accurate science details.
It irks me to no end that I can't watch a sci fi video on youtube now without the little science cultists constantly nitpicking the "science" of Skyrim, Fallout, Resident Evil, Empiryion, Star Wars, Trek, etc.
:{
Why are you talking about blood / liquid boiling in a vacuum, and showing something that seems to be liquid, maybe boiling, but under different gravity forces? Pressure isn't gravity, you can set any pressure in a ship, even if it's not submitted to 1g gravity. Then you flash thermal diagrams and curves without any legend, I'm not sure what to make of this, there is no science without some degree of methodology.
#TheExpanse
#theexpanse
#theexpanse