According to Wikipedia:
http://en.wikipedia.org/wiki/Megametre
The Earth's polar circumference is 39.94 Mm. (It was exactly 40 Mm
from 1791 to 1875, but the definition of the metre was changed; see
metre).
The distance from Amsterdam to Marseille is approximately 1 Mm.
The Earth's equatorial diameter is 12.76 Mm.
The mean distance from the Earth to the Moon is 384.4 Mm.
Jupiter's equatorial diameter is 143 Mm.
Quebec province's total area is 1.542 Mm2.
The speed of light is approximately 299.792 Mm/s.
http://en.wikipedia.org/wiki/Gigametre
One astronomical unit (AU) or Earth's average distance from the Sun is
149.6 Gm.
Jupiter's average distance from the Sun is 778.5 Gm.
PSR J1719-1438 b's average distance from the pulsar PSR J1719-1438 is
0.666 Gm, which is the smallest orbit of any known exoplanets.
The mean diameter of the Sun is 1.393 Gm.
The mean diameter of red supergiant star Betelgeuse is 1302 Gm.
David Pearl MetricPioneer.com 503-428-4917
----- Message from [email protected] ---------
Date: Fri, 27 Dec 2013 22:10:31 -0000
From: Martin Vlietstra <[email protected]>
Subject: RE: [USMA:53471] Re: Math Test
To: [email protected]
I tutor physics at British "A Level" standard (years 12 & 13) on a
one-to-one basis. England has a number of examinations boards, each of which
has its own variant of the syllabus. There are also two distinct physics
exams - one which prepares students to study physics at university as part
of a science/engineering degree and one to emphasis the roile of physics in
the practical world. I tutor both.
Some of the boards dispense with prefixes completely, others expect students
to understand prefixes between "nano" and "giga", but "megametre" and
"giogametre" are never used. I also checked Wikipedia to see what was done
in other languages:
English - https://en.wikipedia.org/wiki/Solar_System
German - https://de.wikipedia.org/wiki/Sonnensystem
French - https://fr.wikipedia.org/wiki/Syst%C3%A8me_solaire
Spanish - https://es.wikipedia.org/wiki/Sistema_Solar
Russian -
https://ru.wikipedia.org/wiki/%D0%A1%D0%BE%D0%BB%D0%BD%D0%B5%D1%87%D0%BD%D0%
B0%D1%8F_%D1%81%D0%B8%D1%81%D1%82%D0%B5%D0%BC%D0%B0
Japanese - https://ja.wikipedia.org/wiki/%E5%A4%AA%E9%99%BD%E7%B3%BB
None used Mm or Gm, but rather used thousands, millions or billions of
kilometres or au (astronomical units) - a unit that is listed in the SI
brochure as being permitted to be used alongside SI.
-----Original Message-----
From: [email protected] [mailto:[email protected]] On Behalf
Of [email protected]
Sent: 27 December 2013 15:59
To: U.S. Metric Association
Subject: [USMA:53471] Re: Math Test
Small minds are self-limiting. What is the width of a hydrogen atom?
How far is Jupiter from the sun? Intelligent people need appropriate units
to measure very small and very large things.
David Pearl MetricPioneer.com 503-428-4917
----- Message from [email protected] ---------
Date: Thu, 26 Dec 2013 22:12:41 -0000
From: Martin Vlietstra <[email protected]>
Reply-To: [email protected]
Subject: [USMA:53469] Re: Math Test
To: "U.S. Metric Association" <[email protected]>
I also agree. In addition, I would be wary of talking about
megametres (even though the term is technically correct) - this unit
is hardly ever used in the literature. I think it appropriate to
limit oneself to the prefixes "mega" to "micro" until one is ready to
start introducing joules, watts and the electrical measurements when
once could extend the range upwards to "terra" and downwards to "pico"
(both of which are used in IT or in electrical measurements.
-----Original Message-----
From: [email protected] [mailto:[email protected]] On
Behalf Of Ressel, Howard (DOT)
Sent: 26 December 2013 13:26
To: U.S. Metric Association
Subject: [USMA:53468] Re: Math Test
I agree, too much math and work for 8:30 on December 26th.
-----Original Message-----
From: [email protected] [mailto:[email protected]] On
Behalf Of Harry Wyeth
Sent: Wednesday, December 25, 2013 11:46 PM
To: U.S. Metric Association
Subject: [USMA:53463] Re: Math Test
What is the point here? I started the survey and quit when
encountering all the arcane prefixes. If the goal is to educate folks
about the simplicity of SI, this is a great way to botch it. No real
person in a metric country will ever know what a yota-whatever is, and
it is not necessary. If we could get people to just deal with liters,
kilometers and meters, and kilograms (and a few of their variations
that we all use), that is all we need to do. The results of this
"survey" will be meaningless, regardless of the good intent of the person
who created it.
HARRY WYETH
On 12/25/13, 1933:33, [email protected] wrote:
https://www.surveymonkey.com/s/25LRWBD
David Pearl MetricPioneer.com 503-428-4917
----- End message from [email protected] -----
----- End message from [email protected] -----
