Question: Consider an infinitesimally small fluid element with density ? (of dimensions dx, dy and dz) fixed in space and fluid is moving across this element with a velocity vec{V}=uvec{i}+vvec{j}+wvec{k}. What is the final reduced form of net mass flow across the fluid element?
Options
A : frac{partial ho}{partial t}
B : hovec{V} dx ,dy ,dz
C : abla.( hovec{V})
D : abla.( hovec{V})dx dy dz
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