Mach number is the ratio of the actual speed of fluid(or an object in the fluid) to the speed of sound in the same fluid at the same state:

Ma = V/c

Mach number can also be defined as the ratio of inertial forces to elastic forces.

Mach number is the ratio of the actual speed of fluid(or an object in the fluid) to the speed of sound in the same fluid at the same state:

Ma = V/cMach number can also be defined as the ratio of inertial forces to elastic forces.