Which property of the atmosphere determines the speed of sound?

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Prepare for the ASA Aviation Maintenance Technician General Test. Utilize flashcards and multiple-choice questions with hints and explanations. Ace your exam!

Multiple Choice

Which property of the atmosphere determines the speed of sound?

Explanation:
Temperature sets how fast sound can travel through air because it governs how vigorously the air molecules move and collide, which is how a pressure disturbance is transmitted. In gases, the speed of sound scales with the square root of the absolute temperature, so warmer air carries sound faster. For air, v is about 343 m/s at 20°C and increases as temperature rises, reflecting the relationship v ∝ sqrt(T) with T in Kelvin. While pressure, altitude, and humidity can tweak the speed a bit, they are not as influential as temperature—the dominant factor determining how quickly sound waves propagate through the atmosphere.

Temperature sets how fast sound can travel through air because it governs how vigorously the air molecules move and collide, which is how a pressure disturbance is transmitted. In gases, the speed of sound scales with the square root of the absolute temperature, so warmer air carries sound faster. For air, v is about 343 m/s at 20°C and increases as temperature rises, reflecting the relationship v ∝ sqrt(T) with T in Kelvin. While pressure, altitude, and humidity can tweak the speed a bit, they are not as influential as temperature—the dominant factor determining how quickly sound waves propagate through the atmosphere.

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