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- Xref: sparky alt.rush-limbaugh:12357 talk.politics.space:1621 sci.space:18325
- Path: sparky!uunet!spool.mu.edu!agate!cavebear.Berkeley.EDU!tyersome
- From: tyersome@cavebear.Berkeley.EDU (Randall Tyers)
- Newsgroups: alt.rush-limbaugh,talk.politics.space,sci.space
- Subject: Re: Justification for the Space Program
- Date: 29 Dec 1992 02:07:12 GMT
- Organization: Plant Biology
- Lines: 30
- Sender: tyersome@insect.berkeley.edu (Randall Tyers)
- Distribution: usa, world
- Message-ID: <1hobsgINN3b1@agate.berkeley.edu>
- References: <1992Dec18.191837.11025@cs.rochester.edu> <18DEC199221562125@judy.uh.edu> <1992Dec23.110509.22141@ke4zv.uucp>
- NNTP-Posting-Host: cavebear.berkeley.edu
-
- In article <1992Dec23.110509.22141@ke4zv.uucp> gary@ke4zv.UUCP (Gary
- Coffman) writes:
- [...]
- >
- >Large scale imports from space face a dire problem in any event. What
- >are we going to do with all that extra mass? Earth's gravitational
- >field will so increase that no one will be able to stand if we bring
- >in too much from space. Ultimately we have no choice but to use and
- >reuse the materials here on Earth. Fortunately that is getting easier
- >and easier as technology advances.
- >
- >Gary
-
- If this was a joke (it has to be right?? doesn't it?) you should have
- indicated this in some manner. (eg. :-) or ;-) ) As your statement
- stands it raises doubts about your comprehension of very basic
- physics.
-
- A table tells me that the mass of the earth is ~6x10^22 tons! If I
- recall corectly the formula for the strength of a gravitational field is
- g=GMe/Re^2 where e stands for earth thus the surface gravity of the
- planet increases in direct proportion to its mass ie g is proportional
- to M.
-
- Thus to get a 1% increase in g you would need to increase the mass of
- the earth by 1% or 6x10^20 tons. This would be a rather ambitious
- project :-) and a 1% increase in g probably wouldn't be a major problem
- anyway.
-
- Randall Tyers
-