hi I'm Russell with the hack smith and
we are here at the Ontario Science
Centre challenges zone today and we're going
to talk about the cool science of
electromagnetism, let's take a minute to talk
about it! All right!
hey guys I'm the Hacksmith and on our
YouTube channel we take fictional ideas
from comics movies and video games and
make real working prototypes -- last year
we made Captain America's iconic shield
complete with an electromagnet bracer
that allows us to attract it from short
distances now! Now movies tend to take
science for granted so let's talk a little
bit about electromagnetism and why
Captain America shield cannot be
attracted from great distances just like
the movies. So electromagnetism
is one of the four fundamental forces of
physics. There are gravitational, electromagnetic,
strong nuclear and weak nuclear.
electromagnetism is just like
electrostatic but with flowing electrons
instead of static charges -- basically
flowing electrons or electric current
causes an imbalance of charges resulting
in a magnetic field. If you pass the
current through a copper wire you create
the magnetic fields around the wire if
you coil up the wire then you increase
that magnetic field by placing an iron
core within the coil you channel the
magnetic fields and create an
electromagnetic! Now the strength of
electromagnet varies on two things the
amount of coils or the amount of
current running through them put simply
the more coils or more current equals a
much stronger field. Unfortunately the
strength of that magnetic field
decreases proportional to the inverse
square of the distance so while I might have
10,000 newtons of lifting force at the
electromagnet, at a distance of one meter
Russell can't even feel it! But if i bring it
in close he's not gonna be able to take it.
If we wanted to attract the shields in the
same distances as shown in the movie we
quite literally need Tony Stark's arc
reactor to power the thing which can
hypothetically produce over 3,000 megawatts (a nuclear power plant!)
of electricity! Now of course, that kind of power
would melt the electromagnet! To learn
more awesome stuff, check out the other 60
seconds of science videos by clicking on
the links in the description below, or
come to the Ontario Science Centre!
Anyways thank you very much for watching!
...and may the force be with you!
