試題詳解

48. For the speed of sound, we know that the speed of sound is underestimated if an isothermal thermodynamic process is considered rather than an adiabatic process. Which of the following is true?
(A) The bulk modulus of air during an adiabatic process is greater than the bulk modulus during an isothermal process.
(B) The bulk modulus of air during an adiabatic process is less than the bulk modulus during an isothermal process.
(C) The speed of sound is independent of the bulk modulus of air.
(D) The speed of sound increases with decreasing temperature.
(E) None of the above