GENIRE-L Archives

Archiver > GENIRE > 2003-03 > 1047638488


From: "Mike Day" <>
Subject: Re: What is the meaning of the term "Scot-Irish"
Date: Fri, 14 Mar 2003 10:41:28 -0000
References: <NMLaa.10838$wJ1.1034032@newsread2.prod.itd.earthlink.net> <JbMaa.18415$EN3.149805@newsfep4-glfd.server.ntli.net> <1TMaa.210201$Zr%.52673@news01.bloor.is.net.cable.rogers.com> <a4dn6vgomas50urs2224akdlmbjj9bk5g4@4ax.com> <wsRaa.213443$Zr%.45044@news01.bloor.is.net.cable.rogers.com> <Ob7ba.32095$L1.6666@sccrnsc02> <WL8ba.220579$Zr%.75563@news01.bloor.is.net.cable.rogers.com> <V2nba.41841$L1.8170@sccrnsc02> <b4l5c5$u71$3@newsg2.svr.pol.co.uk> <1v6u6v8ta1laet4um7h3pi9h9m10020kn4@4ax.com> <3E6F4EC1.2090901@otenet.gr> <b4nmth$oka$1@newsg2.svr.pol.co.uk> <3E6FC194.8050005@otenet.gr> <b4phoh$4cj$1@news6.svr.pol.co.uk> <3e709dfd$0$4846$cc9e4d1f@news.dial.pipex.com> <b4q82c$2fn$1@newsg1.svr.pol.co.uk> <3E70CC46.DA65B7A8@alltel.net> <b4s495$t50$2@newsg2.svr.pol.co.uk>


"Bob Builder" <> wrote in message
news:b4s495$t50$2@newsg2.svr.pol.co.uk...
>
> "rick" <> wrote in message
news:...
> > Bob Builder wrote:
> >
> > > "Mike Day" <> wrote in message
> > > news:3e709dfd$0$4846$...
> > > >
> > > > "Bob Builder" <> wrote in message
> > > > news:b4phoh$4cj$1@news6.svr.pol.co.uk...
> > > > >
> > > > <snip>
> > > > > > Genesis 5: 6
> > > > > > And Seth lived an hundred and five years, and begat Enos;
> > > > > > Genesis 5: 7
> > > > > > And Seth lived after he begat Enos eight hundred and seven
years, and
> > > > > > begat sons and daughters;
> > > > > > Genesis 6: 8
> > > > > > And all the days of Seth were nine hundred and twelve years; and
he
> > > > died.
> > > > > >
> > > > >
> > > > > Years were much shorter then because
> > > > > the Earth was nearer the Sun.
> > > > >
> > > > > Bob
> > > > >
> > > > So Seth and co lived approx. 900 years. That is nominally of the
order of
> > > > 10 times more than a healthy individual in western society might
live today.
> > > > Let us assume that the actual years at that time were in fact
shorter for
> > > > the reason Bob states.
> > > >
> > > > Assuming the mass of both the sun and the earth are unchanged:
> > > >
> > > > 1. How much nearer to the sun would the earth have to be to provide
an orbit
> > > > of approximately 1/10th of the current duration?
> > > >
> > > > 2. How much warmer would it have been on the earth's surface as a
> > > > consequence?
> > > >
> > >
> > > Obviously warm enough to cause the great flood,
> > > the like of which has never been seen since.
> > >
> > > Bob
> >
> > Hmm. So, the sun melted the ice caps, causing the flood? Which would
imply that
> > the earth was moving *towards* the sun, otherwise there wouldn't be any
ice caps
> > to melt. Now, we are moving away?
> > Damn. I gotta pack. I *hate* moving....
>
> The maths is very complicated but when the earth was closer to the
> sun it not just travelled a shorter distance but also travelled much
faster.
> The correllation between the length of the year and the surface
temperature
> of the planet is not at all straightforward.
>
> For the moment, I'm prepared to give the benefit of the doubt to the
editor of the
> Bible.
>
> Bob
>
According to Kepler's third law, the square of any planet's orbital
(sidereal) period (P) is proportional to the cube of it's mean distance (R)
from the Sun. That is to say that:

P to the power 2 = (a constant c)*(R to the power 3)

Let us use present earth years (Earth's sidereal period) as the unit of time
(i.e. P=1), and for distance let us use Astronomical Units (AU) (the present
mean distance of the earth from the sun) (i.e. R=1). In this case the
constant c = 1 and therefore:

(P to the power 2)=(R to the power 3)

We are trying to determine what R should be if P is reduced to one tenth of
earth's current orbital period. So if P=0.1, R must be equal to the cube
root of P squared, or:

R = P to the power 2/3

Therefore R = 0.1 to the power 2/3

so R ~ .215

The present orbit of Mercury is at R = 0.39. Therefore Earth's orbit would
be much closer to the Sun than Mercury is currently. To give some idea of
how hot it would be at the Earth's surface, the daytime temperature on
Mercury is approximately 700 degrees Kelvin or 427 degrees Celsius or 800
degrees Fahrenheit. Whichever way you look at it that's hot!!

Mike



This thread: