The speed of an aircraft is given to be 900 km/h. If the speed of sound at that location is 315 m/s, the Mach number is _____.
a. 0.63
b. 0.84
c. 1
d. 1.07
e. 1.20

Mach number is a relationship between the speed of an object in relation to the speed of sound. Mach number is always represented in ratio form a Mach number GREATER THAN ONE means the Object is moving at a SUPERSONIC SPEED while if is LESS THAN it means the Objective is moving at SUBSONIC SPEED,when it is EQUAL TO ONE means it is moving at a TRANSONIC SPEED,when it is GREATER THAN FIVE it is moving at a HYPERSONIC SPEED.

MACH SPEED=SPEED OF OBJECT/SPEED OF SOUND SPEED OF OBJECT= 900*1000/3600

SPEED OF OBJECT=250metersper second

MACH SPEED=250/315

MACH SPEED= 0.804

The speed of an aircraft is given to be 900 km/h. If the speed of sound at that location is 315 m/s, the Mach number is _____. a. 0.63 b. 0.84 c. 1 d. 1.07 e. 1.20

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The speed of an aircraft is given to be 900 km/h. If the speed of sound at that location is 315 m/s, the Mach number is _____.
a. 0.63
b. 0.84
c. 1
d. 1.07
e. 1.20