Re: [Phys-l] (no subject)

[carmelo@pacific.net.sg]

A neutrino may pass through a light year of lead and yet not be  
stopped by any of the lead atoms. This does not mean that neutrino is  
always 100% unstoppable?

Quoting Bob Sciamanda <treborsci@verizon.net>:

> For completeness, it should be pointred out that there is a fundamental
> difference between Joe's embodiment (neutrino/earth) and mine (infinite
> masses).
> I modeled "unstoppable/immovable" by using inmfinite masses in a real
> interaction, involving real forces.
> Joe's embodiment achieves "unstoppable/immovable" by employing two objects
> with NO interaction mechanism.
> If you remove the possibility of any interactive forces, then "unstoppable"
> and "immovable" will follow, but with new meanings.
>
> This semantic twist should be pointed out if these two embodiments are
> presented to students.
>
> I must repeat: the whole subject is physics swimming in semantics  (PHUN!).
>
> From: Dr. Richard Tarara
> Sent: Wednesday, February 23, 2011 11:45 AM
> To: Forum for Physics Educators
> Subject: Re: [Phys-l] (no subject)
> Also interesting that using Joe's neutrino as the unstoppable object, the
> result is the same NOTHING happens.
>
> ;-)   Ricl