In fluid mechanics, Mach number is 1, if the speed of an object is equ – McqOptions

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1.	In fluid mechanics, Mach number is 1, if the speed of an object is equal to the ________?
A.	Speed of light
B.	Rotational speed of sun
C.	Speed of sound
D.	Speed of revolution of earth around the sun
Answer» D. Speed of revolution of earth around the sun

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