1.

The quantity of water flowing in thin cylindrical sheet of thickness dr is ____________

A. (dq= frac{h _w}{4 L}(R^2-r^2)2 rdr )
B. (dq= frac{h _w}{4 L}(R^2-r^2)4 rdr )
C. (dq= frac{h _w}{4 L}(R^2-r^2)8 rdr )
D. (dq= frac{h _w}{4 L}(R^2-r^2)12 rdr )
Answer» B. (dq= frac{h _w}{4 L}(R^2-r^2)4 rdr )


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