Re: [Phys-L] no spin decay

[brian whatcott <betwys1@sbcglobal.net>]

-------- Forwarded Message --------

	

	

	

	

	

No access to Physics Teacher, but the URL to the spinner demo was 
interesting

https://www.youtube.com/watch?v=G7hh42AgBlQ&feature=youtu.be

Grabbing the screen plot here

<http://s880.photobucket.com/user/betwys/media/ScreenHunter_355%20Sep.%2017%2021.31.jpg.html?sort=3&o=0>

Allows x,y estimates to be extracted via Graph Grabber (a free download)
leading to a fit to this function:

 rate = 13.7123447*exp( -0.0891256151* time^(2/3) )

The plot of this fit given here:
<http://s880.photobucket.com/user/betwys/media/rotation.jpg.html?sort=3&o=0>

Notice the amusing precision of the model from such rough and ready data!

Brian W
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^


 On 9/17/2017 2:39 PM, bernard cleyet wrote:
> No result from spin decay p. 384 current “The Physics Teacher”. [1]
>
> or bc incompetent.
>
> p.s He suspects no data, so can’t verify suspicion not linear decay, so will be forced to purchase spinner, and use MicroSet to determine dissipation detail.
>
>
> [1]  tinyurl.com/WS-SpinDecay
> _______________________________________________
> Forum for Physics Educators
> Phys-l@mail.phys-l.org
> http://www.phys-l.org/mailman/listinfo/phys-l