Question
a.
\(dq=(\frac{∂V_x}{∂x}+\frac{∂V_y}{∂y}+\frac{∂V_z}{∂z})dxdydz \)
b.
\(dq=(V_x+\frac{∂V_x}{∂x} \frac{dx}{2})dydz-(V_z+\frac{∂V_z}{∂z} \frac{dz}{2})dxdy \)
c.
\(dq=(V_x-\frac{∂V_x}{∂x} \frac{dx}{2})dydz \)
d.
\(dq=(V_x-\frac{∂V_x}{∂x} \frac{dx}{2})dydz-(V_y-\frac{∂V_y}{∂y} \frac{dy}{2})dxdz+(V_z-\frac{∂V_z}{∂z} \frac{dz}{2})dxdy \)
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