Q. Mach number is used in connection with the speed of

A
Spacecraft
B
Ships
C
Aircraft
D
None of these
Solution:

In fluid dynamics, the Mach number is a dimensionless quantity representing the ratio of flow velocity past a boundary to the local speed of sound. where: M is the Mach number, u is the local flow velocity with respect to the boundaries, and c is the speed of sound in the medium.

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