What is the mach number of an aircraft flying in air at a pressure of 101306N/m^2 and velocity 556m/s?(a) 1.634(b) 2.145(c) 0.125(d) 1.225I have been asked this question in examination.I'd like to ask this question from Measurement of Mach Number topic in division Atmosphere and Air Data Measurement of Aircraft Performance

What is the mach number of an aircraft flying in air at a pressure of

1.	What is the mach number of an aircraft flying in air at a pressure of 101306N/m^2 and velocity 556m/s?(a) 1.634(b) 2.145(c) 0.125(d) 1.225I have been asked this question in examination.I'd like to ask this question from Measurement of Mach Number topic in division Atmosphere and Air Data Measurement of Aircraft Performance
Answer» The correct choice is (a) 1.634 To ELABORATE: The answer is 1.634. Given P=101306N/m^2, V=556m/s. We KNOW that ρ and γ of air are ρ=1.225kg/m^3 and 1.4. From the equation M=V\(\SQRT{\frac{\RHO}{\gamma P}}\) On substituting and solving, M=556\(\sqrt{\frac{1.225}{1.4*101306}}\) M=1.634.

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