RJE Posted November 7, 2010 Share Posted November 7, 2010 Greetings I Link to comment Share on other sites More sharing options...
AzeoTech Posted November 7, 2010 Share Posted November 7, 2010 Not sure. Your substitution is fine. There are only three points I can make: 1) you have 3.5 - Value in the line where you say (O) =, but then have 3.45 in the fully substituted formula 2) Ln() is natural log, while log() is log base 10. Not sure what Excel uses. 3) ^ 1 does nothing. Its like + 0 or * 1. Link to comment Share on other sites More sharing options...
RJE Posted November 8, 2010 Author Share Posted November 8, 2010 Your #3 showed me my error, it should be ^-1. All works just fine now. Thanks Link to comment Share on other sites More sharing options...
AzeoTech Posted November 10, 2010 Share Posted November 10, 2010 Well, its probably faster to do 1/xxx - 273.15 as that would be the same as xxx ^ -1 - 273.15 and slightly faster. Link to comment Share on other sites More sharing options...
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