On Feb 8, 11:55=A0pm, "Y.Porat"
> On Jan 28, 7:27=A0pm, giovanni.m.cappe...@gmail.com wrote:
>
> > Hi,
>
> > if we have two body (mass =A0m1 and m2), initially at rest at reciprocal=
> > distance d, how much time they need to reach each other ?
>
> > Have you any ideas?
>
> > Thanks!
>
> -----------------------------------------
> There =A0 must =A0 be a very basic particle (or particles)
> that hteircollision timeis ............ zero!!
> ie a perfect elastic collision !!
Then its mass is infinite, dumbass.