good day smart person how's it going my name is dylan dance i'm a
physicist from the land down under grab a coffee hold on where's my coffee yup
grab a coffee grab a chair grab a veggie my sandwich
look grab whatever you want let's talk some natural philosophy
so today we're going to be trying harder with dr stone we've done one video thus far it was
pretty cool found some science but we didn't try all that hard so let's watch some more i'll see if
i can find any more physics-y things in the show and uh we can break it down so let's get straight
into this one and before we get into the video i just wanted to say yes we are watching an anime
and looking for physics in an anime and they probably weren't considering theoretical physics
when writing anime although this show actually might have been um you might be thinking you're
taking this too seriously blah blah blah but as this show points out society and the world
is completely utterly dependent on science and technology and almost nobody knows anything about
science for technology which is kind of a shambles right so what i'm doing by making these videos is
essentially trying to trick you guys into learning some physics and how some of this technology works
and how some of the science works and to try and show you guys how it's actually pretty
awesome stuff um so yeah that's why we're making this i'm not taking myself too seriously if
you couldn't tell from the suit and i hope you guys aren't either so let's get into the video
and leave me a comment down below if you have any good ideas for things that i can watch i've been
getting a lot of comments about steins gate so you can bet your that one will be coming eventually
and if you haven't already please apply some time derivative of momentum onto that subscribe button
foreign
but also a great idea
all right all right let's pause it there because there's a whole bunch of cool things there we can
uh spend a while talking about from what magnets are to lightning causing permanent magnets
um and to generate it so let's talk about magnets but first let's me let me say something that'll
help you understand some of the concepts so keep in mind that if you have an electric
charge like say an electron right and you move it around you will generate a magnetic field
all right and if you have a magnet and you move it around you will create a current okay so
just keep that in mind so what is a magnet well
when you have a material it is generally made of atoms right and these atoms have electrons and
these electrons have this intrinsic property we call spin all right they're not literally spinning
but just imagine that they are okay so these electrons are spinning and because these electrons
are spinning there they have electric charge that generates a magnetic field like i told you so
electrons are like tiny little magnets all right now you have a material full of atoms and full of
these electrons you have a material full of these little magnets now most materials aren't magnetic
because these little magnets are generally uh mostly pointing in opposite directions and so
the magnetic forces cancel out all right but when you have a magnetic material all these forces
are aligned they point in the same direction so that's what creates a magnetic material and with
that you have pretty much everything you need to understand how generators generate electricity so
you have something that spins a turbine and if you recall what i said at the start you attach magnets
to this spinning turbine and what does a moving magnet generate an electric current so obviously
you need something to spin this turbine right and you know if you burn some coal that'll generate
some steam and that can spin your turbine or you can drop some water onto your turbine and get it
to spin anyway it all results in the spinning of a turbine that has magnets on it and that's how
for the most part we generate all electricity even with nuke at nuclear power plants that's
exactly how it in the end kind of works so what about lightning can it really create permanent
magnets like this show is demonstrating the answer is yes so recall what i said at the start
lightning bolts are rapidly moving electric currents so like i said moving electric charge
causes a magnetic field and yes lightning bolts are hugely magnetic and yes things like soil rocks
can become magnetic after it's been struck with lightning so this is called
remnant magnetization um and sometimes when we think things have become magnetic from a
lightning we call it lightning induced remnant magnetization or natural remnant magnetization
um and some of the naturally occurring uh magnetic rocks out there we think we're all struck by
lightning uh how this exactly works we're not too sure that is just a theory about all the rocks
um it may simply just be aligning all the spins all the spins of the electrons
making up all the atoms of a rock um so yeah this anime really did get it right you could
create a magnet using lightning which would be pretty hard uh and then you could create
a generator using this magnet as i've already explained you get it to spin using a turbine and
so yeah i didn't immediately chip in there because i was hoping you guys would catch on
to what was going on if you recall earlier when i was explaining if you move a magnetic uh a magnet
it creates electric current right so water will if you attach a magnet to it in the right way
you can create an electric cone and that's what senku was just talking about it's an
infinite you know source of energy and hydro power which is what this technically is is
exactly that it's what we call a green source of energy it's a renewable source of energy because
it's being generated from water essentially so you have the kinetic energy in the water moving
the uh water will but that kinetic energy is generally coming from potential energy
that you know is being converted into kinetic energy of the flowing water
moving the water wheel which you know moving magnet generates electricity so i'm just going
over a lot so you guys get it and lastly i wanted to talk about something that blew my mind when i
first learnt about it and it's that magnetism is simply nothing more than electrostatics combined
with special relativity now i'll explain this a little bit further but if you want a detailed
and a much better explanation i will link a couple videos in my description so simply the reason why
magnetism is nothing more than electrostatics combined with special relativity that is magnetism
and electricity are actually the same thing is simply because it depends on what reference frame
you are observing electric current or a magnetic field and that's about as simply as i can explain
it so in one reference frame you'll see a magnetic field and in the other reference frame you'll see
an electric field they're really the same thing just viewed from a different reference frame now
if you want more and to truly understand it go click on the videos in the description because it
does take a while to give some decent analogies of what's really going on all right that'll
do it for this video so please subscribe if you haven't already and i'll catch you guys next time