Martin, you keep forgetting how variable driving a car is (like the 0-60 
discussion).
Acceleration, braking and parking on the M25 (joke - it's the worlds busiest 
motorway) all have effects on consumption.  Obv this affects mpg also.


From: [EMAIL PROTECTED]: [EMAIL PROTECTED]: [USMA:40299] Re: convenient 
numerical valuesDate: Tue, 29 Jan 2008 19:48:58 +0000






Bill,
 
I would prefer L/100 km, which, if converted to SI would be m². This would be 
dead easy to visualize.  Assume that fuel consumption is 10^-6 m².  This works 
out at (1 mm)².  Now imagine a string of fuel snaking along the road that you 
are using, square in cross-section with each side of the square being 1 mm.  
Now imagine that you are driving along that road.  As you drive along the road, 
the “string” of fuel will be fed into your engine and will propel your car.
 
I have not worked out what the cross-section would really be, I merely used 
10^-6 m² as an example.
 




From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Bill PottsSent: 
28 January 2008 06:20To: U.S. Metric AssociationSubject: [USMA:40255] Re: 
convenient numerical values
 
J. Ward wrote: 'As a physicist I would speak in terms of "per meter squared."'
 

Maybe so (and we had a discussion on this list a few years ago, involving that 
same ultimate reduction), but it is something that neither the physicist nor 
the layperson can readily visualize (although the physicist can rationalize its 
use).

 

 
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