Wolfram | Alpha: Acres per square mile? (oddities)
- To: mathgroup at smc.vnet.net
- Subject: [mg101146] Wolfram | Alpha: Acres per square mile? (oddities)
- From: AES <siegman at stanford.edu>
- Date: Thu, 25 Jun 2009 07:13:04 -0400 (EDT)
- Organization: Stanford University
Just out of curiosity (and a current need for info) (and to start
learning about W|A), typed:
Acres per square mile
into Wolfram | Alpha. Results came back (had to do a little hand editing
of the following):
Assuming U.S. acres for "acres"
Use
international acres
commercial acres
Irish acres
Hungarian acres
instead
Input interpretation:
acres/mi^2
Unit conversions:
0.3861 acres per square kilometer
6.323 square meters per acre
0.1563 hectares per square kilometer
0.4047 hectares per square mile
0.003861 acres per hectare
Don't see "640" there anywhere! -- and something seriously wrong with
that first unit conversion? (not to mention all the others) -- or at
least the way it's phrased -- more like 250 acres per square kilometer?
Went to M7, tried
Needs["Units`"]
Convert[Acre, Mile^2]
Mile^2/640
Went to Units Tutorial: Seems odd to see "Centimeter", "Meter",
"Micron", "Mile", and a bunch of arcane units listed there -- but NOT
"Kilometer"??? ("Gram" and "Kilogram" are in there).