Question

Which of the following is the correct formula for speed of sound?

(a) \(\sqrt{\gamma RT}\)

(b) \(\sqrt{pRT}\)

(c) \(\sqrt{\rho Rt}\)

(d) \(\sqrt{\gamma R0T}\)

The question was asked by my college director while I was bunking the class.

The above asked question is from Measurement of Airspeed in chapter Atmosphere and Air Data Measurement of Aircraft Performance

Answer 1

Right answer is (a) \(\sqrt{\gamma RT}\)

The best explanation: The correct formula for speed of sound is \(\sqrt{\gamma RT}\) where R=characteristic gas constant, T=temperature and γ is the ratio of specific heat at constant pressure to that of specific heat at constant volume.