Phillip Hall & friends:
I can't quite work this out. If we take the Earth radius as 6371 km, and
assume a perfect sphere, >I get 40030.1735920411 km (rounded to 10 dp) when
I multiply 6371 by 2 * pi (using pi = >3.1415926535 ... from windows
calculator)
This small difference is due to the Pi value you use from computer; and I
use MY rationalised value for Pi of ratio: 100000/31831 that FIXES 'Radian
at 57*.2958 =57*17'44".88.
Thus, Earth circumference is 2*Pi*radius =2x100000/31831x6371
=40030.1592786906 (to 10th decimal) Km. I choose THIS value for Pi since NO
OTHER value for Pi defines *either Pi or Radian - eaxactly*. This is a
deviation of 0.01431335051535 (or 14.3133505 cm).
I have discussed Pi controversy at length, and my views are stored in the
archieves. The point is its TRUNCATION that evaluate ANY two values
differently.
Regards,
Brij Bhushan Vij
(Monday, Kali 5106-W41-01)/D-025 (Wednesday, 2006 January 25H15:14(decimal)
ET
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From: "Philip S Hall" <[EMAIL PROTECTED]>
Reply-To: [EMAIL PROTECTED]
To: "U.S. Metric Association" <[email protected]>
Subject: [USMA:35824] RE: NEW Yard (yd') or Metre New (m') RE: Re: decimal
time
Date: Tue, 24 Jan 2006 22:01:39 -0000
Dear Brij
Considering present length of the Metre, Earth can be considered a
'hypothetical sphere' of radius 6371 km, with its
circumference:40030.1592786906 km.
I can't quite work this out. If we take the Earth radius as 6371 km, and
assume a perfect sphere, I get 40030.1735920411 km (rounded to 10 dp) when
I multiply 6371 by 2 * pi (using pi = 3.1415926535 ... from windows
calculator)
Earth circumferece of 360-degree, then works to 111.194886885252
km/degree; and 1/10^5th of the degree could be usefully used to re-define
the METRE (New (m') as length unit:
1 Metre New (m') = 1.11194886885252 m
This can easily be TIED to the new interval for time (without changing the
existing face of 24-hour clocks) 24-hours x 100 md x100sd, each decimal
second of 0.36 of SI-atomic second.
If we keep the same clock face we won't be able to count the decimal
minutes or seconds surely?
The normal clock face (both 12 and 24 hour) uses the fact that 60 divides
by 12 so the hour markings (or alternate hour markings for 24 hour version)
count 5 min or 5 sec intervals. In other words the seconds, minute and hour
hands can all use the same markings on the dial. Unfortunately neither 12
or 24 divide into 100 so the markings won't line up.
Your decimal time Brij will need digital clocks (which I prefer anyway)
Phil Hall
