The mass ratio is defined as the mass of a constituent divided by the total mass of all other constituents in a mixture.
In physics, the reduced mass is the “effective” inertial mass appearing in the two-body problem of Newtonian mechanics. It is a quantity which
Propellant mass fraction
In aerospace engineering, the propellant mass fraction is the portion of a vehicle’s mass which does not reach the destination, usually used as a
Mixing ratio (mass ratio)
chemistry and physics, the dimensionless mixing ratio is defined as the abundance of one component of a mixture relative to that of all other components.
Center of mass (for two particles)
The center of mass of a distribution of mass in space is the unique point where the weighted relative position of the distributed mass sums to zero.
Buoyancy mass (effective mass)
The effective mass of an object which is submerged and suspended via a cord, is the mass of a reference object on the a dry-land pan of the balance that