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In case of streamline flow of a fluid (which is incompressible), consider these streamlines \( A, B \) and \( C \) (as shown in the figure)
Let, \( P, Q \) and \( R \) are 3 planes perpendicular to the direction of flow of streamlines, then which of the following is correct?
(a) \( m_{P}m_{Q}m_{R} \), where \( m= \) mass flow per second.
(b) \( v_{P}v_{Q}v_{R} \)
(c) \( n_{P}n_{Q}n_{R} \), where \( n= \) number of fluid particles crossing area per unit time.
(d) \( m_{P}m_{Q}m_{R} \)
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