[SML] OT: Everything You Know About Faraday Cages Is Wrong

[Phil Haney]

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Poop

-Phil

"Quini, quidi, quici" - I came, I saw, I played a little quidditch.



On Tue, Aug 2, 2016 at 8:13 AM, Joe D via Stagecraft <
stagecraft at theatrical.net> wrote:

> Here is an example of something that is ALWAYS explained incorrectly, or
> at least incompletely. The "Newton's Cradle" toy, which has a set of 5
> metal balls hanging on thread.  Over my career, starting I think in
> elementary school, I had puzzled how the metal balls "know" the number of
> balls that were swung up at the start of the action.  The stock answer I
> was always given, and always read, was that "for every action there is an
> opposite, but equal reaction."  This may explain the total energy, but does
> not explain how the number of balls is maintained.  Why not shoot one ball
> up, with double the force, if two balls start the action?
>
> I had asked several  instructors, including those with doctoral degrees in
> physics, and always got the same stock answer.  As a young person, I
> figured that since I could not wrap my head around this problem, I must not
> have the right mind-set to be able to understand physics.  I think this,
> along with my dislike for boring math classes, is what dissuaded me from
> getting involved with engineering when I was younger.
>
> I realize now, that my intuition about Newton's Cradle was correct, and my
> instructors were wrong.  Also, math was boring, because I had grown up at a
> time when schools were dumbing-down their instructional goals to help
> address the issues race equality.  I.e. like the socialist economic goal of
> making everyone equal, by making everyone poor.
>
> I realize now that I actually have an excellent aptitude for physics.  The
> Internet has really provided a great resource for educating oneself, if you
> can wade through the garbage.  Here is one treatment that addresses the
> elasticity of the balls, and how they contribute to the number of balls
> being preserved through the collisions. (note that, in spite of my aptitude
> towards physics, my educational background is not sufficient to follow all
> of the paper)
> http://www.maths.tcd.ie/~garyd/Publications/Delaney_
> 2004_AmJPhys_Rocking_Newtons_Cradle.pdf
>
> -Joe Dunfee
>
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