Dear John, Madan, and All,
Curiously, a simple mean circumference of the Earth based on John's two
figures brings us preciously close to the original 40�000 km of the original
designers of the metric system.
(40�074 + 39�942) � 2 = 40�008 km
Cheers,
Pat Naughtin
CAMS - Certified Advanced Metrication Specialist
- United States Metric Association
ASM - Accredited Speaking Member
- National Speakers Association of Australia
Member, International Federation for Professional Speakers
--
on 2001/12/24 05.54, kilopascal at [EMAIL PROTECTED] wrote:
> 2001-12-23
>
> Did you calculate the circumference yourself? Because I did not see it listed
> on the site, just the radius as copied below:
>
> Annotation:
> (1) These values can be compared with present measurements, i.e.
>
> - mean equatorial radius: 6378 km
> - mean polar radius: 6357 km
>
> If I calculate the circumference using the C=2pr. Thus 2p(6378) becomes 40
> 074 km and 2p(6357) yields 39 942 km. These are different then what you show.
>
> Is the circumference of the earth still equal to exactly 40 000 km when
> measured along the same meridian used to originally define the metre, extended
> all the way around the globe?
>
> John
>
>
>
> ----- Original Message -----
> From: "M R" <[EMAIL PROTECTED]>
> To: "U.S. Metric Association" <[EMAIL PROTECTED]>
> Sent: Sunday, 2001-12-23 09:48
> Subject: [USMA:16783] Earth's circumference:Is this correct
>
>> According to this website
>> http://http.hq.eso.org/outreach/spec-prog/aol/market/collaboration/erathosten
>> es/
>>
>> the circumference of the earth is
>> 40,090 km in equatorial (radius is 6378 km) &
>> 39,958 km in polar (radius is 6357 km).
>>
>> But this website says
>> http://rainbow.ldeo.columbia.edu/courses/v1001/fermi.html
>>
>> it is 24,000 miles (which is 38,400 km) and they claim
>> that each time zone has 1,000 miles.
>>
>> Which 1 is correct.
>>
>> Madan
>>
>>
>>
>>
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