Mass velocity is independent of temperature & pressure, when the flow
is
(A) Unsteady through unchanged cross-section
(B) Steady through changing cross-section
(C) Steady and the cross-section is unchanged
(D) Unsteady and the cross-section is changed
is
(A) Unsteady through unchanged cross-section
(B) Steady through changing cross-section
(C) Steady and the cross-section is unchanged
(D) Unsteady and the cross-section is changed