Fluid Mechanics
In frictional fluid flow, the quantity, P/ρ + V²/2gc + gz/gc, is

None of these
Constant along a streamline
Increased in the direction of flow
Not constant along a streamline

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Fluid Mechanics
A stream line is

Fixed in space in steady flow
Always the path of particle
Drawn normal to the velocity vector at every point
A line connecting the mid points of flow cross-section

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