The speed of sound in air at 0 °C is 332 m/s. Taking v ∝ √T, what is the speed of sound at 273 °C?
Correct answer B. 470 m/s
Explanation
Absolute temperature doubles from 273 K to 546 K. Since v ∝ √T, v = 332 × √2 ≈ 470 m/s. Assuming v ∝ T would wrongly give 664 m/s.
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