Onsider the general form of the reynolds transport theorem (rtt) given by dbsysdt=ddt∫cvrhobdv+∫csrhobv→r⋅n→d a , where vr→ is the velocity of the fluid relative to the control surface. let bsys be the mass m of a closed system of fluid particles. we know that for a system, dm/dt = 0 since no mass can enter or leave the system by definition. use the given equation to derive and choose the correct equation for the conservation of mass for a control volume.