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- Newsgroups: rec.puzzles
- Path: sparky!uunet!zaphod.mps.ohio-state.edu!rpi!batcomputer!cornell!karr
- From: karr@cs.cornell.edu (David Karr)
- Subject: Re: Billion-year survivability
- Message-ID: <1992Nov20.050058.11151@cs.cornell.edu>
- Keywords: pi, Louie
- Organization: Cornell Univ. CS Dept, Ithaca NY 14853
- References: <1992Nov10.195614.20902@pasteur.Berkeley.EDU> <BxIuMM.GuK@news.cso.uiuc.edu> <1992Nov18.183510.15059@wam.umd.edu>
- Date: Fri, 20 Nov 1992 05:00:58 GMT
- Lines: 19
-
- In article <1992Nov18.183510.15059@wam.umd.edu> difelici@wam.umd.edu (John Patrick DiFelici) writes:
- >
- >If you wanted to hand deliver the message, you could fly off into space in
- >a rocket ship traveling near the speed of light. Time it just right so that
- >when you get back to Earth, the Earth's time frame has advanced 1 billion
- >years. You could then, hand deliver the message, as well as become the
- >oldest living human in existance, at least going by your birth date.
-
- If you set out in a rocket ship that maintains a constant acceleration
- of one gravity (as perceived by you in the ship) for the entire duration
- of a trip straight out to a point some distance away from the Earth and
- back (obviously using its rockets to decelerate during part of that time),
- and timed to take exactly 1 billion years Earth-frame time for the round
- trip, how much will you age during the trip, assuming you live that long?
- What is the dependence on the rate of acceleration?
-
- -- David Karr (karr@cs.cornell.edu)
-
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-