Yes, I had no idea how strong the effect of cold is on conductance. But I also think the pull measurement is being amplified as the scales squish down and the leaf spring gets closer to the magnet.
I think that another main contribution that he doesn't mention is that the iron core is much colder too. The colder the temperature the higher the magnetic susceptibility.
That was a huge difference in pull strength just by cooling the cooper wire/steel rod. Would have been interesting to see the actual current readings before/after using a DMM. Simple, but a good video.
His electromagnet is made using a very thin wire... which also means the wire has a large voltage drop. Freezing the magnet like this drops the resistance in the wire quite considerably. With a lower resistance, less voltage is being converted to heat... which means the magnet field induced is quite stronger! Pretty fun stuff :D.
It looked like the top metal plate was touching the top of the magnet with the last test. If you separated the metal just a bit more, it might show more weight on the scale.
i dont fully know about anything you post but all the videos are so interesting and you speak in a way that gets the information across . really loving this channel
Wanted to let you know that during a job interview allotropes of Tin came up in a conversation. They were impressed with my knowledge of metals. Thanks for the video on it. I got the job!
Sounds like that kind of current would melt the wire at room temp. You'd need to use larger copper wire, which would lower resistance allowing it to carry more electricity.
If you mean the 120V which comes out of the wall, then it wouldn't work. Current from a battery flows in one direction, but current from your wall socket changes direction 60 times a second. That means it wouldn't make a very good magnet. It would just make things vibrate. Also, you cannot control how much voltage AND current is in a circuit. You must obey ohms law. For example, if the resistance of the nitrogen cooled wire is 1ohm, and you connect 120V, then 120A will flow through it. If you want 1A, then you have to connect 1V. Voltage=Current x Resistance.
I absolutely love the idea of using the size of variables to demonstrate relative changes, rather than introducing new ones. It's super clever and I'm absolutely going to use it.
Even with superconducting coils, there's a critical magnetic field in which the resistance becomes non-zero. At that point, the coil rapidly heats up, and it can easily explode, especially since it'll turn the liquid coolant into high pressure gas.
I can't get enough of your videos and its 3am , keep up the good work ! you're doing what I've wanted to do my entire life! When I was 4 , I used to pretend to have a chemistry lab under my bed and now I'm 17 and nobody is taking me seriously when it comes to having my own lab.
The thing I really like about your channel Cody is, that whatever video you make, it is exactly what expected. You don't use fishy video titles and you don't have an hour long intro. The video says 'Electromagnet in Liquid Nitrogen' and that is exactly whats in the video. Im glad I can experience some science with you through your UA-cam. Keep having fun and keep up the good quality! Greetings from Germany! :)
Do you know what I'd really like to see cody do? Make a metal tool from scratch with iron ore the old fashioned way. I feel like he'd actually do it, too.
well done man, glad to see you're able to do some cool experiment you're enjoying thanks to all your views and subscribers, you're one of my favourites and its nice to see you getting perks for being so awesome.
I use to race RC cars and a trick we use to use was to cool the motor with a type of aerosol spray used to remove gum, it would freeze it. Don't remember what it was called for the life of me. Hole shots were way more powerful.
yes but it would consume much more energy. it would be easier to just use a higher voltage power source, but like cody said, he was limited to the two batteries. He doesnt get 10x the force for free.
You can keep increasing their power until something pops, the standard air cooled motor could probably take 100x it's rating if you super cooled it. And obviously it can only make the power you put it, not more. That is why for instance Tesla motors engines are the size of a 10kW industrial motor, but they can output 400kW momentarily.
In the sense he puts it, bandwidth is a measure of how much data you can upload at a given time. Your ISP (Internet Service Provider) sets this limitation based on area, so they can make money by you upgrading to a "different degree of bandwidth", which you can call a service plan. To conclude, Cody couldn't add an intro and an outro because he almost didn't have enough "assigned space/bandwidth". It's the same with cell phone plans in most European countries as well. You can only make x minutes of phone calls, x number of SMS/MMS, and of course the "3gb of data" limitation (which resembles Cody's issue the best).
Colaglass dude i know what bandwith is xd but why the hell does he have a limitation on data? i mean i only know this from mobile data plans where you got a given amount of mb or gb in highspeed data in 4g or 3g and after you have used that you only have 32 kbit/s speeds left but on a home plan ive never seen this before
Because 'Murica. ISPs are basically monopolies and will force about a ~300GB data cap on you, which is suitable for a normal person, except for one situation - video streaming. And that is because they also supply you with cable TV, which no one wants because it sucks, so they try to push it by enforcing an arbitrary data cap.
In some, less privileged parts of the world or anywhere there are businesses out to take as much money from people that they can get there are these things called 'Data caps' where ISPs (Internet Service Providers) limit how much data you're allowed per given amount of time usually per month. I used to have a $60NZD ($60 New Zealand Dollars) plan which gave me 80GB per month. The worst part is that there's no rollover (you don't get to keep the data you don't use per month) so if you don't use all of your data within the given amount of time you're basically throwing your money away.
Sabishī [TAverageG] If he isn't he's fucking nuts. He did a collaboration with random guy and that usually only happens when you are trying to grow a channel. You only grow a channel for profit. There are a lot of time and labor and expenses in making videos like this. If he isn't monetizing he's the dumbest man on Earth.
Hey Cody, It would be interesting to use for a supercooled gauss gun. I'm interested to see what you do next. I also want to thank you for sharing yourself and your passions with us. I really appreciate it!
Initially I browsed past this vid. Then I decided, "Cody found it interesting enough to go to the trouble of making a vid about, I bet I would find it interesting to watch." It was.
did that metal bar and the magnet actually get in contact at 2:30??? IF SOOO the downforce could probably even higher but as the bar hit the magnet it couldn't move down more and was pretty much capped.
Please make a educational video describing the forces that change under the cooling effect of nitrogen. Thank you for making the videos that represent your channel.
Hey Cody, could you do a video on rock tumbling (polishing rocks/semi-precious stones)? I just inherited an old one from a relatve and would like to know how to use one.
Superconductivity is a different phenomenon to this one. Conductors reduce their resistance at lower temperature, superconductors below their critical temperature have zero resistance entirely (although they also have a critical field, above which the superconductivity goes).
Hmmm... Do you know if the magnetic permeability of the steel rod changes with temperature? If so - it may also have an effect. It may be interesting to repeat this experiment without the core, assuming the air within the copper solenoid will remain roughly at room temperature in both cases.
iv never understood why the current doesnt just jump wires and short.... i thought electricity takes the path of least resistance, but instead it follows the wire. this is probly a shit question but im drawing a blank :/ could it be... jumping tiny space between wires is more effort for the electricity, so it just follows the set path of the wire because flowing is less resistance then jumping?
Hey Cody! Where do you get your liquid nitrogen? Do you pick it up from a welding supply shop or make it yourself? Thanks for the videos! I really like the mining series and anything with LN2.
How does cooling actually decreases the copper/magnet resistance? What physical or chemical properties does it alter to increase the overall magnet magnetic strength? Thanks in advance!
cody. you can increase magnetism if you reduce the amount of distance wound. ie if winding is yay long reduce by half distance, resulting in more overlapped wires. I believe this occurs because your concentrating_focussing mag feild rarher than stretching-distorting it. bottom line, wire arrangement plays a big role in magnetism.
notice the sparks caused by the magnetic field collapsing when the connection to the battery is broken - it's a cool demonstration of the properties of inductors
awesome, love your videos cody, I've watched literally all of them (excluding the ones you weren't able to upload & including your novel you are writing) and by the way are you still writing it or what happened?
That's an impressive difference!!
Hey!
Hey there!
i like this new found friendship between two great youtubers
Welcome back to Cody's lab!
Get it? Cos he left and came again? No? Okay? I'll leave now. Stop please.
Yes, I had no idea how strong the effect of cold is on conductance. But I also think the pull measurement is being amplified as the scales squish down and the leaf spring gets closer to the magnet.
I think that another main contribution that he doesn't mention is that the iron core is much colder too. The colder the temperature the higher the magnetic susceptibility.
Wow action lab comment without any reply’s lol, time to fix that.
Lots of electromagnet videos this month. Your demo went way better than mine :)
*your (love your videos btw)
Your experiment was way more complicated though.
Wow old comment!
That was a huge difference in pull strength just by cooling the cooper wire/steel rod. Would have been interesting to see the actual current readings before/after using a DMM. Simple, but a good video.
Wow, I have not expected this much improvement.
Mee neither
His electromagnet is made using a very thin wire... which also means the wire has a large voltage drop. Freezing the magnet like this drops the resistance in the wire quite considerably. With a lower resistance, less voltage is being converted to heat... which means the magnet field induced is quite stronger!
Pretty fun stuff :D.
+Jack Hudler No. MRIs are cooled with liquid helium so that the material inside them will superconduct, which is a somewhat different phenomenon.
+Jack Hudler Uhm it's not the copper that gets superconductive in the MRIs (or any other superconductor for that matter).......
But that's just a regular copper wire. Anyone can do that at home.
Clicked on this so fast. One of your videos and liquid nitrogen together? I'm in! Keep up the great work!
As you are a geologist too, I can't not laugh when I actualy read "Cody Slab". You rock btw ;)
I know Ill learn something every time you upload.
tru
true 😂
It looked like the top metal plate was touching the top of the magnet with the last test. If you separated the metal just a bit more, it might show more weight on the scale.
seriously why would anyone dislike this video its a great video and i dont see any possible reason for people to hate on it
Wow just noticed you have 625k Subs now I remember when you made your 100k subscriber button , Seems your finally getting the attention you deserve!
When i found his channel i think he had less than 100k, nighthawkinlight recommended his channel and thats how i found codys
Hmm, the word "subs" made me think of Sub woofers and how well the coils in them would work in sub zero temperatures :) Really enjoy the videos Cody.
Wasn't it just ~550k a couple weeks ago...?
Barely a year a go he had 1/100th of that, it's amazing how fast his channel is growing.
I found him when he had just about 100k, but I remember watching some of his videos way before that.
i dont fully know about anything you post but all the videos are so interesting and you speak in a way that gets the information across . really loving this channel
so why does this happen? does the cooling effect slow the internal movement of the wires atoms so that the electrons can more freely more throughout?
That is exactly why
You just gave yourself the answer 😂
exactly, it's also why computer's processors and other microchip components process data slower when they're over heating.
okay and how do the electros actually move through the material? inbetween the atoms or bouncing from one to the next?
Why does water come out of the end of a hose when you are only putting water into the start of it?
Beautiful demonstration!
Reading information in a book is one thing, but actually seeing it in action really solidifies that knowledge
Cody, you should see how the pull force changes over time as the electromagnet warms up. I think it would be an interesting experiment to see.
I tried, but the wire running to the magnet got hot before I noticed any reduction.
Interesting anyway!
use a larger wire. 0 gauge or bigger
Wanted to let you know that during a job interview allotropes of Tin came up in a conversation. They were impressed with my knowledge of metals. Thanks for the video on it. I got the job!
Since you're using two scales, wouldn't the magnet have been pulling 50 pounds if only reading 25 pounds on each?
yes
Hey cody! I have an idea! Try wrapping it alot more (10x more than it is now), and use 120v and atleast 1 amp? I hope i dont sound dumb.
Sounds like that kind of current would melt the wire at room temp. You'd need to use larger copper wire, which would lower resistance allowing it to carry more electricity.
Andre Gross yeah I was gonna say it depends on the gauge of the wire
If you mean the 120V which comes out of the wall, then it wouldn't work. Current from a battery flows in one direction, but current from your wall socket changes direction 60 times a second. That means it wouldn't make a very good magnet. It would just make things vibrate. Also, you cannot control how much voltage AND current is in a circuit. You must obey ohms law. For example, if the resistance of the nitrogen cooled wire is 1ohm, and you connect 120V, then 120A will flow through it. If you want 1A, then you have to connect 1V. Voltage=Current x Resistance.
I absolutely love the idea of using the size of variables to demonstrate relative changes, rather than introducing new ones. It's super clever and I'm absolutely going to use it.
Cody, is there a limit to how strong a magnet can be?
As long as you can produce enough power you can always make the magnet stronger.
There is actually and that is the strength of the coil. strong magnets have a tendency to explode.
One can always make stronger coils.
Edit: Nevermind, that would increase the resistance of the wire.
If you cool that coil sufficiently though, you could get it to super conduct and have 0 resistance.
Even with superconducting coils, there's a critical magnetic field in which the resistance becomes non-zero. At that point, the coil rapidly heats up, and it can easily explode, especially since it'll turn the liquid coolant into high pressure gas.
I can't get enough of your videos and its 3am , keep up the good work ! you're doing what I've wanted to do my entire life! When I was 4 , I used to pretend to have a chemistry lab under my bed and now I'm 17 and nobody is taking me seriously when it comes to having my own lab.
Cody, you should try to make something levitate (electromagnetically) through superconduction :D
The thing I really like about your channel Cody is, that whatever video you make, it is exactly what expected. You don't use fishy video titles and you don't have an hour long intro. The video says 'Electromagnet in Liquid Nitrogen' and that is exactly whats in the video. Im glad I can experience some science with you through your UA-cam. Keep having fun and keep up the good quality!
Greetings from Germany! :)
As you like to build canons and to use liquid nitrogen, might this be the first step to a nitrogen cooled coilgun?
sure is. :)
can't wait to see it :D
from your rocket science to your making of a magnet. i love all that you do cody
Do you know what I'd really like to see cody do? Make a metal tool from scratch with iron ore the old fashioned way. I feel like he'd actually do it, too.
Nice demonstration of the effects of temperature on a conventional resistive conductor. Thanks Cody.
You have a bandwidth limit ? that sucks! What are you allowed per month ?
I'm sure time would fly with a tiny limit like that.
Not even close. 10 to the power of 82 atoms (for the universe) if you want it accurate.
I think you smell better your lack of cigar in the game Graves :P
I can watch Cody's videos all day, he makes science really interesting
You are a homophobe! A hater!
What the fuck?
Stop bashing Cody! He's doing his best!!!!
+Phae Is Bae what the fuck?
Jack Alker
Stop the Cody bash you jerk!!!!
Super cooled rail gun?
I was thinking the same thing
Wouldn't the sensors not function properly because of the frost?
Why would I use sensors? Seems like a silly way to do it. ;)
+Sgt Hartman you just just set the magnets to go off where the projectile mathematically SHOULD be.
well done man, glad to see you're able to do some cool experiment you're enjoying thanks to all your views and subscribers, you're one of my favourites and its nice to see you getting perks for being so awesome.
Now I want to know what happens to a very cold electric motor.
implying you can't design lubricants for low temperatures.
I use to race RC cars and a trick we use to use was to cool the motor with a type of aerosol spray used to remove gum, it would freeze it. Don't remember what it was called for the life of me. Hole shots were way more powerful.
yes but it would consume much more energy. it would be easier to just use a higher voltage power source, but like cody said, he was limited to the two batteries.
He doesnt get 10x the force for free.
You can keep increasing their power until something pops, the standard air cooled motor could probably take 100x it's rating if you super cooled it.
And obviously it can only make the power you put it, not more.
That is why for instance Tesla motors engines are the size of a 10kW industrial motor, but they can output 400kW momentarily.
you just have to cool off the coil, nothing more
I didn't expect the difference to be so big. Great video!
Thanks, now i can make my coil gun even stronger xD
rails or gauss?
Gauss, easier to make, uses less energy, yet lower speeds
Bino Woo
not sure which is cooler tbh
That depends on the amount of liquid nitrogen used.
heh
From 2:32-2:37 you can actually see the magnetic pull in the shot, that was the thing that i got the most amazed from. Very interesting, sir!
what do you mean bandwith? xd
In the sense he puts it, bandwidth is a measure of how much data you can upload at a given time. Your ISP (Internet Service Provider) sets this limitation based on area, so they can make money by you upgrading to a "different degree of bandwidth", which you can call a service plan.
To conclude, Cody couldn't add an intro and an outro because he almost didn't have enough "assigned space/bandwidth". It's the same with cell phone plans in most European countries as well. You can only make x minutes of phone calls, x number of SMS/MMS, and of course the "3gb of data" limitation (which resembles Cody's issue the best).
Colaglass dude i know what bandwith is xd
but why the hell does he have a limitation on data?
i mean i only know this from mobile data plans where you got a given amount of mb or gb in highspeed data in 4g or 3g and after you have used that you only have 32 kbit/s speeds left but on a home plan ive never seen this before
Because 'Murica. ISPs are basically monopolies and will force about a ~300GB data cap on you, which is suitable for a normal person, except for one situation - video streaming. And that is because they also supply you with cable TV, which no one wants because it sucks, so they try to push it by enforcing an arbitrary data cap.
Hyperpony what the fuck is this
'merica
In some, less privileged parts of the world or anywhere there are businesses out to take as much money from people that they can get there are these things called 'Data caps' where ISPs (Internet Service Providers) limit how much data you're allowed per given amount of time usually per month. I used to have a $60NZD ($60 New Zealand Dollars) plan which gave me 80GB per month. The worst part is that there's no rollover (you don't get to keep the data you don't use per month) so if you don't use all of your data within the given amount of time you're basically throwing your money away.
Academically, I knew all this, but I guess I never fully appreciated it before. Thanks Cody.
Cody did you know that you're a genius
Your starting to get the amount of subs u deserve. Good luck Cody your one of my favs
Limited bandwidth should be illegal.
That was an absolutely awesomely done video. That really helped me better understand the idea of super-cooled magnets to fix their position too:
Cody how you doing on Pokemon go
😆
well, he is low on data...soooooo....,
He lives pretty much in the middle of nowhere... So probably not great
legend has it Mewtwo is in the mine.
+Kap pa xD
Gotta wonder the thought process behind the scenes for this video to even happen.. Love the great work, keep it up man :)
Hook it up to the mains! You guys have like thirty volts over there, that should give you a bit more of a kick.
the mains are AC though
hmmm. good point. but can an electromagnet with its polarity switching 50 times a second still lift loads efficiently?
shit im getting confused. if you rectify the mains and smooth out the current then it's essentially DC no?
Ac would still have a noticeable attraction but it would be quite a bit weaker since it would be repelling and then attracting twice per cycle.
Good point. I'm no electronics expert but I've watched enough Big Clive to know that one can convert AC into DC.
Wow. I had no clue that the temperature can effect the resistance of wire. Thanks for teaching me something new!
I think Cody uses liquid nitrogen more than fat guys eat cheetos...
Well, it's official, I have learned more from you over the videos of yours I have watched, than I ever have in science class 😂 thanks man,
Is Cody not monetizing his videos? I would love for him to make money off of his videos.
I always assumed he was. Why would you think otherwise?
+Invincible Osprey I've never gotten an ad appear for me, and I don't use adblock.
Sabishī [TAverageG]
If he isn't he's fucking nuts. He did a collaboration with random guy and that usually only happens when you are trying to grow a channel. You only grow a channel for profit. There are a lot of time and labor and expenses in making videos like this. If he isn't monetizing he's the dumbest man on Earth.
+Invincible Osprey Well, maybe he doesn't want to annoy people since a lot of people hate ads.
he does have a patreon so he does have a nice budget without showing us ads.
Your videos keep getting better and better!
Anybody else wondering what this is going to get used for in the future?
2 words: Coil Gun.
I cant wait then
+Cody'sLab do it
I've linked a video in the description showing my old coil gun design.
+Cody'sLab that's exactly what came across my mind
Hey Cody,
It would be interesting to use for a supercooled gauss gun. I'm interested to see what you do next.
I also want to thank you for sharing yourself and your passions with us. I really appreciate it!
Data caps should be illegal.
New codys lab videos are so exiting to see in my sub box.
Once again, awesome video Cody! Every video you upload makes me a smarter person lool
Have a nice day!
I wonder who much difference the result would be if you could use pure silver wire. Is there a significant % increase that is measurable?
As it turns out silver is less conductive than copper at those temperatures.
***** Thanks again for clarification. :)
+Sci-Twi That sounds like a safe and budget-friendly solution. Thanks!
Лол, привет
Yes, but so little it can be ignored.
You won't call a cookie crumble a whole cookie, or are you? :)
i read about it in school,but now it really sticks with me with a visual
Cody: the mad scientist we all know and love
getting closer to a million subs every time I come back to a new video! yay!
Cody, your laugh gives me life
Cody and liquid nitrogen is always a good video
So, supraconduction just reduce the resistance or... make the resistance being a true 0 ?
Copper doesn't superconduct, it just became a better 'resistive' magnet because the resistance of copper drops with temperature
Love your videos Cody, this one was pretty awesome!
Very interesting! Thanks for making the fun videos Cody!
Initially I browsed past this vid. Then I decided, "Cody found it interesting enough to go to the trouble of making a vid about, I bet I would find it interesting to watch." It was.
did that metal bar and the magnet actually get in contact at 2:30??? IF SOOO the downforce could probably even higher but as the bar hit the magnet it couldn't move down more and was pretty much capped.
Great video, explanation, and demo. Thanks!
Gotta love the drawing on the liquid Nitrogen thermo
Love your channel Cody, keep up the amazing work! You inspire me to want to keep trying to grow my own channel!!
all the stuff you do is awesome , thanks for sharing it
How about testing the performance of a speaker in liquid nitrogen?
Very cool demonstration! Thanks for posting!
Really impressive, Cody! Thanks!
loved the video! thanks for such a visual explanation of the concept.
I always enjoy your videos.
thank you cody i was searching this for year
Cody: I did enjoy that, thanks that was very interesting.
I'm glad I stayed up till 6:30 a.m lol
these videos are always wish watching
Please make a educational video describing the forces that change under the cooling effect of nitrogen.
Thank you for making the videos that represent your channel.
Hey Cody, could you do a video on rock tumbling (polishing rocks/semi-precious stones)? I just inherited an old one from a relatve and would like to know how to use one.
Lol I have about 6 of them walking around the yard! (turkeys eat stones and poop them out polished)
+Cody'sLab Try making some nitrocellulose and use it in your mine
Pretty cool cody .i didn't think coolin it would strengthen it so much.
me in almost every cody's videos : press like first and then watch it afterwards
That's a really BIG difference. Now i know why trying to get superconductive wires is an important issue.
Superconductivity is a different phenomenon to this one. Conductors reduce their resistance at lower temperature, superconductors below their critical temperature have zero resistance entirely (although they also have a critical field, above which the superconductivity goes).
Holy cow this channel is awesome.
Hmmm... Do you know if the magnetic permeability of the steel rod changes with temperature? If so - it may also have an effect.
It may be interesting to repeat this experiment without the core, assuming the air within the copper solenoid will remain roughly at room temperature in both cases.
Excellent demonstration.
iv never understood why the current doesnt just jump wires and short.... i thought electricity takes the path of least resistance, but instead it follows the wire. this is probly a shit question but im drawing a blank :/
could it be... jumping tiny space between wires is more effort for the electricity, so it just follows the set path of the wire because flowing is less resistance then jumping?
the wires have a thin coating of plastic on them that can handle a few hundred volts before it arcs out.
Hey Cody! Where do you get your liquid nitrogen? Do you pick it up from a welding supply shop or make it yourself? Thanks for the videos! I really like the mining series and anything with LN2.
Very cool. I was thoroughly surprised!
How does cooling actually decreases the copper/magnet resistance? What physical or chemical properties does it alter to increase the overall magnet magnetic strength? Thanks in advance!
Cody this is so cool. you should get some superconducting wire so you can make an electromagnet without the ferrous core!!
Facinating video Cody!
cody. you can increase magnetism if you reduce the amount of distance wound. ie if winding is yay long reduce by half distance, resulting in more overlapped wires. I believe this occurs because your concentrating_focussing mag feild rarher than stretching-distorting it. bottom line, wire arrangement plays a big role in magnetism.
Wow your channel has grown! keep it up!!
notice the sparks caused by the magnetic field collapsing when the connection to the battery is broken - it's a cool demonstration of the properties of inductors
Always enjoyed the videos hope you're in a better place now. rip
what are you on about?
I hope he keeps making videos in heaven
+Phygar1 he didn't die lol
Very nice, I know you do mainly chemistry videos and I really like them but I would also love to see more Physics videos.
awesome, love your videos cody, I've watched literally all of them (excluding the ones you weren't able to upload & including your novel you are writing) and by the way are you still writing it or what happened?
That was a pretty impressive difference. Would this work on, say... Electric motors, or would that cause other problems with the bearings or whatnot?
You said you were going to extract uranium from the ores you bought on Ebay. When will that be if you still plan on doing it?
That is actually so awesome!!
So if you were to use gold wire instead of copper wire, it would have less resistance making it a more powerful magnet or no?