- Initial pressure, \( P_1 = 170 \, \text{psia} \)
- Initial temperature, \( T_1 = 200^{\circ} \mathrm{F} \)
- Final pressure, \( P_2 = 60 \, \text{psia} \)
- The process is isentropic.
- We need to find the ratio of the initial to final speed of sound.
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