Talk:Flue gas stack

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Did You Know An entry from Flue gas stack appeared on Wikipedia's Main Page in the Did you know? column on 24 June 2006.
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++Lar: t/c 14:07, 24 June 2006 (UTC)

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[edit] Reasons for reverting equation changes by Markus Kuhn

Markus, I can see from your User page and your Contributions page that you are very interested in ISO standards. However, Wikipedia articles are read by many, many people who don't have your intimate knowledge of those standards or of engineering units in general. In the case of the flue gas draft equation, your changes to make it unit-neutral as per ISO will make the equation prone to confusing people. Despite your labeling of the constant,C, as having units of K/m, there are many people who always use bars as their pressure unit (rather than Pascals) who will be confused. Then there are those who still use pounds/in² and degrees Fahrenheit who will also be confused. And there are the inexperienced readers who will not understand what units to use in any formula unless it is explicitly spelled out. For those reasons, I have reverted the equation to spell out all of the units. Regards, - mbeychok 15:01, 23 September 2006 (UTC)

[edit] Why are there rings around chimneys?

Can anyone help with this - i have been challenged to find out and cant find it anywhere - on industrial / power plant chimneys why do they have markings around the top?

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