Battery And Magnets On Liquid Mercury

[@FlyingJetpack1]

[Cody messes around with stuff] [Accidentaly makes a motor] Sounds about right.

[@ElectroBOOM]

Awesome! What happens if you move a strong magnet over mercury? Will the Eddie currents pull the mercury around?

[@elyesgrati]

Good question

[@tomaszw2807]

ElectroBOOM Mehdi! Hi!

[@kurtmaleon6337]

ElectroBOOM u guys should do a colab

[@CraftAero]

Shouldn't you be busy mailing out my Keysight scope from the last give-away ??

[@SamSamuylik]

Where's my scope?!

[@alastairmcdonald1144]

"If I'm wrong on that, blame Ben Franklin." I need to remember that line.

[@Slikx666]

Alastair McDonald It would be great on a t-shirt.

[@Melinmingle]

All i know he was an American president. Do i need to know more before it gets funny? I dont get it

[@whereswa11y]

Tesla made that error all the time and why he invented AC so he could not be wrong

[@eideticex]

Melvin Jansen. He was also an inventor that experimented with electricity. May have heard of one of his inventions. The lightning rod.

[@lrastus6692]

Franklin did not know if the "electric fluid" ran from negative to positive ... so he took a guess ... a wrong guess ... and thought that positive to negative was correct . That thought persisted for a long time until it was proven wrong . Electrical current flows from negative to positive ... it is electrons that are the current carriers .

[@mortlet5180]

I really have to say, it is an amazing experience to be a patron of Cody'slab: I literally commented on this topic a couple of hours ago, and where a simple reply would be more than enough, Cody took the time to work it into a whole explanation video! If anyone reading this is still unsure of whether or not becoming a patron is worth it, you really are missing out. I have never once regretted becoming a patron, but I have had quite a number of really nice conversations and interactions with Cody.

[@trulyinfamous]

MRLT I wish I had the money to be a patron.

[@jamesortiz5388]

Truly Infamous I've seen people with patreon accounts donate to other patreon accounts.

[@brianreddeman951]

Yep worth it. :)

[@Quaz.]

America working as intended?

[@seigeengine]

Maybe comparing him to an escort was not the right way to advertise his Patreon... but what do I know.

[@Jenerik_Guy]

So what you're saying is we should simply replace all rivers with mercury so we can use these as boats. sounds good to me

[@kevin42]

Jenerik_Guy iv heard that dymethalmercury works better, the boat will go faster ;)

[@3a.m.284]

The boat will be rolling at such an intense rate you'd be out of then boat in an instant

[@neilwilson5785]

What a fantastic future! We would get used to mercury eventually.

[@lerquian1970]

Thats better than my idea of replacing tap water with soda

[@tekmonk23]

Eloborate on that one please I am quite interested

[@kmarasin]

Crosses are vectors "into the page", dots are "out of the page". Think of an actual arrow: the cross is the feathers, the dot is the tip. Edit: Okay wow didn't know being pedantic was so likeable. I think I'm learning the wrong lesson here.

[@theCodyReeder]

right... its been a while ok.

[@kazsmaz]

Cody'sLab we also use the physics gang sign remember. Haha I'm sure you remember

[@jbardolf2805]

Cody'sLab sorry, this is inexcusable, so I'm unsubscribing

[@kmarasin]

It's okay, you're doing more to educate people about physics in one video than I have in a decade of actually teaching the subject. Who cares if you didn't dot the i's and cross the t's. Thanks for the Faraday motorboat!

[@shenn7332]

Might as well blame Ben Franklin for that one too

[@tom_something]

The side of the battery with the nub sticking out is the positive end, which receives electrons from the circuit. The electrons come out of the negative terminal, which is the flat side. You know what might be cool? Using a resistor to limit the flow and gluing "paddles" to the magnets so it very slowly rotates and paddles its way across the mercury. Of course, mercury being so dense and sociable (alloy-wise), finding a suitable paddle material might be tricky.

[@kmarasin]

It would be interesting to see if paddles would be able to push it in the other direction. The battery is spinning faster than what would be the rolling speed, and in the opposite direction, so it's possible it would move more mercury that way.

[@compuwise]

I believe the positive end was incorrectly labeled decades ago before we really understood the flow of electrons. They left the schematic symbols as they were and we just adapted. I know this is true for diodes. Electrons actually flow like water finding it's level. They fill a void until the charge is balanced.

[@tom_something]

Yes, Mississippi Kid. The folks studying electricity early on knew that current was flowing, but didn't have the apparatus to determine the direction it was flowing. So it was sort of a 50/50 coin flip. They decided, "OK, this side is called positive, and the current flows to the negative side." When we learned which direction the electrons were actually flowing, this left us with a dilemma. "Flowing from positive to negative" has a nice ring to it, but correcting it in that direction would mean that we'd need to say that everything we used to call positive is now negative. That would mean when you rub fur on a piece of amber, we'd have to change the language about which item is which. Instead, we decided, "What we used to call positive, we're still going to call positive. Current flows from negative to positive, so we're going to have to say that electrons are negative." So there's true current, which is the actual motion of electrons from negative to positive, and there's "conventional current", which is visualizing a flow from positive to negative. Although it's not accurate, it widely applicable, and in fact conventional current is the basis for electrical engineering. In a DC circuit, for example, we usually consider the negative terminal to be "ground" and the positive terminal V+, rather than having the positive terminal as ground and the negative terminal V-. And diodes, which simply stated try to allow current to flow in only one direction, are drawn in schematics as a triangle pointing against a line, and the direction the triangle points is the direction of conventional current. It's not ideal, but it's what we've got.

[@tom_something]

Also, Randall Munroe is a smart and clever guy, but I bet even he had to Google and double-check which way the electrons go in the whole silk-glass thing. At least I like to think so.

[@nicodeklerk1617]

Would be cool if the material of the paddle was less dense than mercury so that with the weight of everything on it, it sinks but when its running it "runs" on top of the mercury.

[@ChaseStayancho]

I'm 15 years old and I've been watching Cody since I was around 12 years old. I've honestly learned a lot about geology, certain minerals and chemicals, and a little about gardening. I plan to be an electrical engineer when I'm an adult so most of what Cody is about will not apply to my career, but it is still fun and entertaining to watch this videos and learn new and interesting things. Good job on the videos, Cody! Keep it up!

[@MrGordane]

Chase Stayancho you should definitely watch ElectroBOOM's channel ;)

[@ChaseStayancho]

MrGordane I watch him all the time as well haha, thanks for the suggestion though

[@anameisrequired3729]

You can be an electrical engineer before you're an "adult"!

[@mantisnomo5984]

Many electrical engineers never become adults. "Growing old is mandatory; growing up is optional."

[@mantisnomo5984]

Chase Stayancho - Au contraire! If you get a job to design things as an electrical engineer, you will be expected to draw upon every predictable smidgen of physics or engineering that you know to create the best possible design for a product.

[@JakeAvatar1]

Something something right angles to the direction of current.

[@MrEm6er]

*cough cough* THE MIDDLE FINGER IS FOR B-FIELD *cough*

[@owenfarmer1588]

Em6er THE THUMB IS RESERVED FOR THE FORCE

[@Deuphus]

If you were wondering, Cody was not suffering from Mercury poisoning attacking his central nervous system. He was demonstrating the "Right Hand Rule" in electronics.

[@Nighthawkinlight]

Would love to see a mercury fountain made by submerging an energised coil. Turn the coil sideways and it would be like a jet engine to push a little boat around

[@bartek2836]

He had gloves on while playing with mercury... WHO ARE YOU AND WHERE IS OUR CODY?!?!

[@tjyoyo3]

electricity is like dangerous yo

[@purplealice]

I loved your delighted mad-scientist chuckle when the apparatus began to move :-)

[@LheNuggetz]

Best mad scientist this side of KZbin. Thanks for the entertainment Cody.

[@broran_]

Wow, that's actually really sweet! It's like one of those "build a motor with a battery, a magnet, and a wire" videos, but even cooler!

[@koharaisevo3666]

It's called homopolar motor

[@broran_]

It's 2018, we don't say things like that anymore. this is ironic, don't kill me

[@sang1025com]

AMD Productions lol

[@RiggyRonnie]

This is a clear demonstration of the right hand rule good job Cody.

[@mantisnomo5984]

Except that 3 polarities were incorrect: The electron has negative charge, and will move opposite the right-hand rule; crosses represent the tail and not the head of the magnetic field vectors; and the nipple is the cathode(+) end of the battery.

[@JDH94]

Honestly, I learn more from Cody’s videos than school -_-

[@jackvernian7779]

I guess it's time to pay attenton and/or take initiative then

[@JDH94]

Jack Vernian no, school doesn’t teach shit. Instead we sit in a chair for 7 hours and learn nothin interesting.

[@jackvernian7779]

Study on your own then

[@JDH94]

Jack Vernian I don’t need to. I have 3.7 GPA. All I’m saying is we don’t learn interesting stuff in school.

[@telephony]

*SCIENCE RULZ!!!* (in good part due to Cody's amazing videos) :-) Thank you Cody, for taking the time to perform these experiments and publish your findings here on KZbin! :-D

[@stephenrock-wc6xt]

Cody you're a mad scientist!! During the winter I seen some punch throughs on the ice on my pond. I am going to do some magnet fishing have a hunch there might be some meteorites in there!!

[@cn0412]

This channel never let me down.. Thanks Cod.

[@toucaninterieur8011]

This would also works on salty water if you could make the battery float with pieces of cork or something.

[@cookieman434]

Honestly I love how you ''teach'' us the whole thing, I could stay up all night watching these cause they are so interesting. Keep up the good work Cody, and thanks for the small science lessons :)

[@thecapacitor1395]

Hey, ever thought about making Aerogel?

[@clickhereidareyou5950]

He should do dat

[@Golden_Era285]

Cody you should try it in gallium maybe gallium has the same conductivity as mercury with would cause the batter to spin in the same way as it was with mercury.

[@ryPish]

Magnetohydrodynamics! In mercury! Because of course it's gotta involve mercury on this channel :p You could make a similar propulsion mechanism with a series of magnets to make it work in salt water, or if you have power burning a hole in your pocket, just ionize air and make your own little flying saucer complete with pretty plasma!

[@mantisnomo5984]

Or you could configure a tube connecting two vessels containing Hg, run a DC current from one to the other, and place a magnet by the tube to pump Hg from one vessel into the other.

[@bmeetze]

The positive side of the battery is the side where it sticks out. The negative side is the flat side. I just checked. Awesome demonstration of current!

[@autumnsemler8]

Here at Cody's lab FUN is our number 1 priority Person From The Crowd "What about safety?" OHHH ya that is number 85 next to carrying about flat earthers

[@Kenman620]

Love what you do and watching your experiments. Always like watching and learning something new every video you make.

[@KJMagnetics]

Awesome video. Wonder what would happen if you had a small current running through the mercury and then tried it. Could you do it without a battery??

[@B.McAllister]

I predicted it'd get hot before I clicked play after reading the title. Similarly to having batteries in a pocket full of change. Back in the day when cassette and CD walkmans were a thing, I had batteries in my pocket and put some change in with them after buying a drink. My pocket got hot real fast. Almost exploded. I was young and didn't think anything of the dangers at the time haha. Live and learn I suppose. Awesome video.

[@Ivian1000]

This can be used in a real boat using the ions of sea water. It is called magnetohydrodynamic drive

[@kmarasin]

See "The Hunt for Red October".

[@Landogarner83]

kmarasin but only the movie. In the book they use an impeller drive :)

[@dimitar4y]

No rush cody, always take your time, proper preparation, calmly doing your best. Your videos are fantastic. c:

[@TomokosEnterprize]

Aside from the polairity being reversed on yer drawing this is so cool. Can you power a small boat or ? with it ?

[@georgezarifis7409]

Actually, the polarity is not reversed on the drawing. Because of a decision made by scientists a long time ago, the actual polarity of a circuit is opposite to the one drawn on paper. That's because people at first assumed that electrons are positively charged, and when they discovered they are negative they just didn't feel like changing every scientific paper about electricity writted so far. So if you want to talk about how electrons really work yoy have to draw the polarity opposite to what we are used to.

[@spudd86]

They way he drew the battery is backwards, the end of a battery with the nub on it is positive.

[@georgezarifis7409]

Yeah, i noticed that after posting the comment and didn't feel like changing it...

[@DancingRain]

This is the kind of video that keeps me hooked on this channel! It shows that you're genuinely enjoying this experiment and that makes this so much more fun to watch. :) Also, the pointy end of the battery is usually positive.

[@DrakkarCalethiel]

Now I wanna see it with a 18650... probably not a good idea. :D

[@tom_something]

It'll definitely move.

[@cdawson198600]

Drakkar Calethiel 😄 that was my first thought... the paddle boat explodes.

[@DrakkarCalethiel]

Actually it would be interesting how fast it would spin. But lithium ion batteries and a dead short is definitely not a good combination...

[@theterribleanimator1793]

i don't know, mercury and explosions is right cody's alley.

[@johnpossum556]

try it first with an 18650 charged only about 1/3rd of the way, that should add a safety factor to it. I learned the hard way not to store NiMHs in the same pocket as my change as my leg started to burn and stink while I was photographing Cooley Damn. Glad they weren't li ion!

[@JerryEricsson]

I have always been amazed at how Mercury behaves, this is the first time though that I have seen this demonstration. I am impressed, in fact I would go so far as to say this is indeed cool!

[@eddievanhorn5497]

The battery is drawn with reverse polarity.

[@OSrBurns]

Eddie Van Horn It's a short circuit.

[@Videohead-eq5cy]

Eddie Van Horn Cody blames ben

[@zabnat]

So does short circuit reverse polarity of a battery?

[@steve42lawson]

Sharma, battery still the same, regardless of short, else what is compelling electron flow? Nub not rubbed out by radical current!

[@Videohead-eq5cy]

Steve Lawson ?

[@JimCoder]

I was expecting it to short but I never expected the motion. I learned something today!

[@xWood4000]

That's a compact and powerful motor for it's simplicity.

[@beefchicken]

xWood4000 it’s operating at the dead short current of the battery, that’s why it appears powerful. This kills the battery.

[@xWood4000]

Beefchicken Industries Haven't thought about that dead short currents are higher.

[@OSrBurns]

Beefchicken Industries yep, it needs a resistor to limit the current.

[@caracaes]

It is also pretty similar to the first ever electric motor, designed by faraday. Faraday died from chronic mercury poisoning from playing with the motors

[@ElPinguinLoco]

Absolutely love how you can tell exactly when Cody starts doubting himself

[@WacKEDmaN]

i know it doesnt really matter in this case, but you got ya battery terminal polarity wrong..the nipple end is +ve...cool "boat" tho..looks like hours of fun!

[@Milamberinx]

Well... actually we got what we call positive and negative the wrong way around in electronics. What we call positive in electronics is the source of electrons, so has a negative charge.

[@dondakota920]

tradition electric theory has current flowing positive to neg, and electron theory has the electrons flowing neg to pos. However the battery manufactured put the nipple on pos, so does appear to be an error on cody's drawing. Any physicists care to chime in?

[@Basement-Science]

Shannon Gerry no, that´s not what is wrong with polarities. Only the polarity of *_current_* is the wrong way around. The negative is where electrons come from, they move to the positive because they are negative themselves. It´s the direction of conventional current flow which goes from positive to negative.

[@dondakota920]

I believe the battery is indeed drawn backwards

[@whereswa11y]

two wrongs make a right in this case

[@dracrichards734]

I love watching your videos Cody. Especially your mercury videos and chemistry vids. Absolutely astounding. Really wish I had some money to get one of those mercury necklaces. I have some gallium and have been wanting to get some mercury but can't seem to find any for cheap and don't have the money to get one of the old mercury thermostats. Keep up the awesome work and keep these epic videos coming buddy.

[@brucebaxter6923]

Magneto hydro dynamics. The USA navy had a research catamaran running on this in the 80's

[@brucebaxter6923]

Lotus also uses this method to cast their cylinder heads.

[@veganwaffle]

You’re answering the real questions I never thought I wanted to know

[@littlebacchus216]

You been handling silver nitrate with bare hands again Cody?

[@mantisnomo5984]

Bare forearm, it looks like.

[@czdaniel1]

"You been handling silver nitrate with bare hands again Cody?" --- That's the line the old-perv pilot says to the little boy in the movie _Airplane_

[@PSIponies]

It's so adorable how excited he gets.

[@martindinner3621]

MHD (magnetohydrodynamic) motor. Well, MagnetoHgDynamic in this case!

[@martindinner3621]

Built a saltwater MHD for my senior year science fair. One of three judges understood the concept.

[@benjaminmiller3620]

Yeah, thinking the same thing. You built one? Details? How effective was it?

[@matthiasburger2315]

Magnetomercuridynamic

[@ToddLarsen]

That's really really cool and I dig the sound also! You are on to something with this experiment I'm thinking.

[@marcussmithereens-smithert5409]

Where can I buy some Cody's lab batteries?

[@kainebishop9791]

He made those batteries out of some stuff he dug out of a rock.

[@Muny]

I wonder if you could make a very simple low-pressure mercury pump using this deflection method. No moving parts to fail would be quite interesting.

[@quantumlab9130]

If only mercury wasn't so toxic ):

[@arashikumo7593]

Jack Hudler , How would that make it non toxic? Life as we know it can only exist with water being abundant on our world.

[@islxndboy]

nice to see a modern representation to the precursor of the ac motor tesla made through the great mind of the grandfather of magnetism michael faraday.....great job cody and keep it up!

[@MichaelBerthelsen]

Haha, right-hand-rule...😁

[@bobwhaley5497]

Watching him turning that thumb around. Once you learn it you never forget it, but you have to twist that damn thumb to see it.

[@lazyman1234567890]

but isnt his rule usage completely incorrect? He should be using his left hand for an electron :/

[@Videohead-eq5cy]

아유 use your right hand, and flip the answer for the electrons

[@watsisname]

A "left hand rule" works for negative charges too.

[@JPKenneys]

Just as I was in the comments typing "what happens with round magnets?" You used round magnets, thank you

[@JustinY.]

No wonder why some people saw science as magic back in the day

[@Tony-375]

Of course you’re here, didn’t know you watched Cody!

[@MichaelBerthelsen]

Tony 375 The AI bot follows all the biggest channels.

[@HomeGrownPyrotechnics]

i was like codyslab video = justin.y comment

[@LordFantasthick]

They didn't had batteries back then you dumbass

[@notkamara]

Michael Berthelsen lol he aint a bot

[@MegaInformazione]

Thanks Cody!By your videos I always learn something new!

[@magnets1000]

Why doesn't it move on the Alu foil?

[@ThePiGuy24]

not enough torque to overcome its own weight.

[@niekpauwels9569]

magnets1000 The aluminium foil doesn't get dragged along with the electrons so no movement is created.

[@n-steam]

The battery moved because the mercury could move (newton's third law). Not enough energy to overcome friction (friction is much less in a liquid) - maybe if given a rolling start it may carry on going.

[@kmarasin]

magnets1000 it's not its own weight it's trying to overcome, it's the friction between the foil and the surface it rests on. Remember, the Faraday motorboat moved because it was able to exert a force on the surrounding mercury, turning it into a sort of rocket. The mercury moved freely, allowing IT to push the motorboat forward. On the foil it's trying to do the same thing, but the foil won't move because it sticks too much to the surface. It's like trying to move a rowboat by walking around inside of it. On water the boat will shift around, but on land it won't. In this analogy, the water is the mercury, the land is the foil, the boat is the boat, and you are the chemical reaction inside the battery.

[@BlueWolfCyberSecurity]

I’d have never expected that! This is randomly awesome!

[@johnpossum556]

"Spiraling electrons create magnetism" ...how can I trust this from a guy who doesn't even know the button end of the battery is positive?

[@niekpauwels9569]

John Possum They create a magnetic field the same way a coil with a current trough it makes an electromagnet, just without the wire but it's the same thing.

[@WoodysAR]

John Possum Actually, the FLAT side on the back is positive, the rounded button end is negative! Watch batteries right here on my desk.

[@mute8s]

NextWorld VR but any double A like the battery he was using has the positive on the button end.

[@mute8s]

John Possum give Cody a break. If you watched more of Cody's videos and saw how smart he is you would understand that he made a mistake. Everyone makes mistakes, even you.

[@johnpossum556]

@Niek Pauwels: Yeah, that is what I was envisioning, specifically the left handed rule as taught from electronics college. I didn't know we actually knew *what* the mechanism behind magnetism actually is. I'm a little skeptical of his explanation.

[@animamundii]

Cody’s love for mercury is truly unconditional.

[@GregorShapiro]

I Don't know if others have commented about the vector drawing of the arrows, but the points (arrows coming out of the plane of the paper) are traditionally drawn as circles with a dot in the center [the point of the arrow], tails (vectors pointing into the plane of the paper) are drawn as crosses [think of the fletching of an arrow]. Perhaps the mixup with battery polarity and electron travel direction caused two wrongs to make a right? Great video Cody, and a really neat observation! I love these "simple" motors! Some current limiting circuit or resistor might mitigate the heat buildups in the battery but would probably diminish the speed of the 'motor'.

[@Imdor]

Pretty much that simple copper wire, magnet and AA battery motor that were so popular on Facebook years ago, this simply switches the copper wire for mercury, awesome.

[@kevinsteeno3726]

There is so much freaking science going on in this video! I love it

[@shawndiehl1959]

Cody's the neighbor we all deserve.

[@electronicsNmore]

Cool demo

[@ahobimo732]

This is why KZbin needs a "FREAKING LOVED IT" button.

[@JournalistJim]

you never cease to amaze the hell outta me Cody :P

[@Deemooo]

Very interesting! I would have said it was a railgun effect but you disproved it with the Al foil. Also, "Blame B Franklin" has become one of my favorite quotes lol

[@RageQuitingFTW]

In Standard Model electric diagrams electrons actually flow out from the positive, even thought the "positive" terminal has an abundance of electrons. Diagrams written with the Electron Flow Model show the negative terminal having the negative charge.

[@operavirtues]

New way to make boat,i dont even know anymore.Btw love your videos,keep up the good work

[@locouk]

So if you wrapped the battery in a polystyrene sheet to give buoyancy, the same effect could be achieved with a saline solution?

[@Sorestlor]

I forsee the next generation of physics teachers will heavily and perhaps are already using your videos. They explain various things fairly well through demonstration. The teachers can always clarify details.

[@guntertv304]

Cool. Your childlike curiosity always brings us new things to talk and think about.

[@JosephParker_Nottheboxer]

What you need are small plastic paddles taped to the flat side of the magnets, show it as a tiny paddle boat. Maybe a "front" and "back" axle of different sized paddles and batteries.

[@lenorelestrange]

I love you cody, been watching for years now and would love to see you do this again but with a small dollar-store solar panel in place of a battery.

[@1_glucose_biscuit_lifetime564]

Cody doing some Awesome Cody stuff !

[@thelastcube.]

Cross points are Mag Fields inwards and dots are outwards of the plane/page. Other than that, seems about right. Wonder if this work on ionic liquids or sols though.

[@maerlon101]

Feel like it's been a while ince the last super science-y vid. Nice to see one again.

[@Robothut]

That dead short would tent to heat up the battery but I bet the mercury helps dissipate some of the heat away from the battery. Cool vid. Thank You for posting !

[@BionicleFreek99]

i don't think that motorboating mercury is a good idea, but you're the boss cody!

[@jtjjbannie]

This is the coolest thing I have ever seen!

[@Klaevin]

"if I''m wrong on that, blame Ben Franklin" LMAO, I couldn't stop laughing!

[@hondaboy3052]

Hey Cody I'm new to the channel and I really enjoyed your video and like the way you explain the processes of each experiment to the best of your abilities . Keep up the amazing work 👌🏼

[@sciencemodelaboratory7298]

simply brilliant.

[@Tectuz]

Was just surfing KZbin and stumbled upon “Bismuth Crystal” and instantly thought it would be cool if Coby would try to make a perfect crystal, experiments whit different cooling methods to form big complex crystals, picturing a slow moving bowl whit the molten bismuth that would move slowly in a symmetrical circular pattern while it cools could maybe do something unexpected. Upvote if you agree it would be cool so he sees ^.^

[@ametprod]

=D LOve your work man =) Love and joy for you and yours from PORTUGAL !! ;)

[@j-hon8202]

For the explanation of the circular path of an electron in a magnetic field, you want to be using Flemings left hand rule for a uniform magnetic field. As the force applied on the electron is perpendicular to the motion of the electron and the magnetic field, the electron forms a circular path

[@jinxshaddix]

Littarly the only KZbinr that doesn't. Force extend content to

[@niekpauwels9569]

The right hand rule you are using for the curving of te electrons is correct if the charge would be positive, as the electrons have negative charge the way they curve is opposite.

[@BigKarl519]

This is so cool Cody. I'd would seriously love to see this done with a 3.7v 18650. Oh boy I hope that becomes a thing, you know like maybe a mercury drag strip.

[@JackSparrow-gh5ur]

Love your videos cody, can't wait to watch more. Also really hope to see more episodes of Cody's Mine. It would be really cool if you got it to be a youtube red show!

[@wtg2988]

This is a very nice way of showing the working principle of the "first magnetic motor" by Faraday, which he demonstrated in 1821. I remember a similar demo by my physics teacher when he explained the right hand rule / Lorentz force. See "homopolar motor" on wikipedia.

[@frodothehobo9581]

I think lorentz is one of the most under apreciated scientists. I took quite a special mind to figure this out for the first time, and then come up with the calculus. , And so much is based off of this. We need a statue of the man!

[@nolan928]

Cody you did an excellent job of explaining thank you

[@zoke101]

"I stumbled across". HOW DO ANYONE STUMBLE ACROSS THIS!? Who has mercury, two magnets, and a battery just laying around in a manner where this accidentally happens? xD This is why i love this channel.

[@itsevilbert]

Direct electric current flows from the positive terminal to the negative terminal (because of a simple mistake early in the history of electronics and everyone just goes with it). Mathematically positive to negative works out the right answer, which is the same as the reverse in terms of magnitude. But you are totally correct Cody, electrons do indeed flow from negative to positive. And changing a billion textbooks is just not going to happen.

[@sarahbingham1133]

Wow! That battery boat is cool! I ❤️ u cody

[@TCBYEAHCUZ]

This is in essence a MHD thruster, or Magnetohydrodynamic thruster, essentially, liquid mercury is similar to a plasma in that they are both fluids that are conductive. We can do the same in reverse too. If there was an LED light instead of a battery and two strong magnets, with a positive and negative for each magnet, a flowing mercury would generate an electric current and light would be emitted in the LED diode.

[@akashmukherjee2405]

Can you make ammonia by Haber's process and use the same to generate nitric acid by Ostwald's process? Atleast a small model for demonstration of possible....

[@amosbackstrom5366]

Akash Mukherjee. It's too complicated a system to scale down. Just the working pressure is all but unachievable without an expensive industrial pump. I think using a platinum catalyst allows for less extreme conditions. But the yields from one pass would be less than 1%. And that's weeks of research and design and thousands of dollars on special hardware for proof of concept. Ammonia is one of the most mass produced chemicals in industry and cheap.

[@stanervin7581]

You win! Perpetual motion created by CODY!