Question Detail
Question
At what temperature will the speed of sound in air be 3 times its value at 0°C?
Correct Answer
Option C is the correct answer.
Detailed Explanation
v ∝ √T. v₂ = 3v₁ => √(T₂/T₁) = 3 => T₂/T₁ = 9. T₁ = 273 K. T₂ = 9 × 273 = 2457 K = 2184 °C.
Hint
Speed of sound is proportional to the square root of absolute temperature.