[ExI] FW: Interstellar FedEx

spike spike66 at att.net
Mon Sep 28 14:39:10 UTC 2009


> ...On Behalf Of Anders Sandberg
> Subject: Re: [ExI] FW: Interstellar FedEx
> Tomaz Kristan wrote:
> > You can use as little entropy as you want to, for to move something 
> > from A to B., The lower limit is 0.
> Why?
> Note that I'm interested in finite-time movement of 
> macroscopic masses.
> --
> Anders Sandberg
> Future of Humanity Institute
> Philosophy Faculty of Oxford University

Ja.  If springs are used to accelerate and decelerate the mass for instance,
there is always some friction in the spring, and some entropy created upon
contact of the mass to the decelerating spring.  But I think Tomaz might be
right: the lower limit approaches zero even in finite time movement.


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