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What is the speed of sound where density and pressure are 1.225kg/m^3 and 101306N/m^2?(a) 340.26m/s(b) 330.26m/s(c) 313 m/s(d) 325 m/sThe question was asked in examination.The doubt is from Measurement of Airspeed in section Atmosphere and Air Data Measurement of Aircraft Performance

Answer»

The CORRECT OPTION is (a) 340.26m/s

To explain: The answer is 340.26m/s. Given P=101306N/m^2, ρ=1.225kg/m^3 and we know that γ for air is 1.4. From the formula, a=\(\SQRT{\FRAC{\GAMMA P}{\rho}}\)

a=\(\sqrt{\frac{\gamma*101306}{1.225}}\)

a=340.26m/s.



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