Gino says that the analog of Gauss's law for the flow of an incompressible fluid of density ? at constant velocity
is
for an imaginary surface within the fluid. Lorenzo says that it is true only if the area where the fluid enters the surface and the area where it leaves the surface are both perpendicular to the velocity of the
fluid. Which one, if either, is correct?
A.
B.
C.
D.
E.
Answer: A
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