#### eNtRopY

t' = t * gamma,

where, gamma = [1 - (v/c)

^{2})]

^{-1/2}.

The problem of course is finding the limit of how much energy is needed to transport a human at high enough speeds for the length of the journey to become reasonable. I suppose that if there were a means of efficiently converted mass into energy then the limit is simply:

E = m

_{fuel}* c

^{2}.

The energy needed to move the ship transporting the human would of course be:

KE = m

_{ship}* c

^{2}* [gamma - 1].

So, E > KE tells us how much fuel would have to be consumed.

eNtRopY