Question

At what temperature velocity of sound is double than that of at 0°C

• A. 819 K
• B. 819°C
• C. 600°C
• D. 600 K

Answer 1

Answer: (B)

819°C

Answer 2

$v \propto \sqrt{T}$⇒ $\frac{v_{2}}{v_{1}} = \sqrt{\frac{T_{2}}{T_{1}}}$⇒$2 = \sqrt{\frac{T_{2}}{(273 + 0)}}$

$\Rightarrow$ $T_{2} = 273 \times 4 = 1092K = 819^{o}C$