Mass Flow Rate
Simply put, this defines the volumetric rate with which fluids flow (kgs-1).
In a system where there is a fluid flow and no sources or sinks the the mass flow rate must be equal at all points within that system
That is, if the pipe constricts, the fluid flows faster; if it widens, the fluid flows slower. This is, in effect a different interpretation of the law of conservation of momentum
|1 lbm s-1||=||0.454 kg s-1||1 lbm h-1||=||1.26x10-4 kg s-1|
|1 ton h-1||=||0.282 kg s-1||1 slug s-1||=||14.6 kg s-1|