- #1
fonseh
- 529
- 2
Homework Statement
I have no idea how the third formula of dy/dx is derived ...
Homework Equations
The Attempt at a Solution
I know that the Q = (1/n)(A)(R^2/3) [(s)(^0.5)] ,
Q = K [(s)(^0.5)]
, so , K= (1/n)(A)(R^2/3)
i know that for very wide channel , y = R
A = by
K= (1/n)(A)(R^2/3)
= (1/n)(by)(y^2/3)
= (1/n)(b)(y^5/3)
Thus , (K^2) = [[ (1/n)(b)]^2 ](y^10/3)
but , it seems that the author just got (y^10/3) ,
So , is the author wrong ?