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When the Mach number is ____, the flow is to be supersonic?
43. When the Mach number is ____, the flow is to be supersonic?
- Less than 1
- Greater than 1
- Equal to 1
- Equal to 0
Answer: B) Greater than 1
Explanation:
The Mach number is the ratio of flow velocity to sound speed. When the Mach number is more than one, the flow is in the subsonic region. The Mach number is greater than one in the supersonic zone, indicating that the flow velocity is greater than the speed of sound.