(a) Suppose that a 300-m-long pipe is filled with air at a temperature of 47 °C, and one end of the pipe generates sound waves. How long does it take for the wave to reach the other end?

(b) If a tube is filled with helium at a temperature of 320 K and a sound wave is generated at one end of the tube, how long does it take for the sound wave to reach the other end? For monoatomic gases, such as helium, γ =1.67.