Mr Mavic,

Thanks for the post above. I will try this out of curiosity this weekend.

One note from above. If I were using that lab manual, I would find the instructions a bit insulting to my intelligence. First, it gives specific instructions about how to convert seconds to minutes. Secondly, it informs the person on how to calculate an equation with parentheses. Both dont provide much assurance in the author about the users of the manual.