<html><body><div style="font-family: times new roman, new york, times, serif; font-size: 12pt; color: #000000"><div><span style="background-color: #f6f9fd;" data-mce-style="background-color: #f6f9fd;">hello</span><br style="background-color: #f6f9fd;" data-mce-style="background-color: #f6f9fd;"><span style="background-color: #f6f9fd;" data-mce-style="background-color: #f6f9fd;">I need the derivation of equation not just the equation. I mean that how can I derive equation from basic laws.in document ARW_V3 just said that equation is like that and by substituting some Variables in the general equation the new form derive and the way that with this substituting how the equation derive is not clear. I need a document that describe these things.</span><br style="background-color: #f6f9fd;" data-mce-style="background-color: #f6f9fd;"><span style="background-color: #f6f9fd;" data-mce-style="background-color: #f6f9fd;">thanks alot</span></div></div></body></html>