[Healeys] Tire Pressure

Dr. B abraund at siue.edu
Wed Dec 16 16:35:00 MST 2009


Rather than make unsubstantiated statements, "Nitrogen doesn't react to 
temperature changes ..." maybe we should look at the scientific data.

 From the Handbook of Chemistry and Physics the thermal coefficient of 
expansion for Air is 0.0036728 while for Nitrogen it is 0.003673. These 
numbers refer to the change in volume per unit volume per degree Celsius 
temperature change. So for a volume of 10 lites (Air vs Nitrogen) 
undergoing a temperature change of 10 C the change in volume is 0.36728 
liters for Air and 0.36730 liters for Nitrogen.

Thus, the statement that Nitrogen doesn't react to temperature changes 
as much as air is false. And claims by tire manufactures or sellers is 
just that claims, not facts.

Bad science is just like bad math - BAD!

Art Braundmeier
BJ8/43199

-- 
Plagiarism is an academic crime,
 punishable by academic death.

---Tommy Lee Jones as Marshall Sharpe in Man of the House


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