Question

The velocity of sound in dry air at $0^{\circ }C$ and at 74 cm of Hg pressure is $332m{s}^{-1}$, then the velocity of sound at ${50}^{\circ }C$ and 77.5 cm of Hg pressure in $m{s}^{-1}$ will be :

• A. 322.7
• B. 347.1
• C. 352.4
• D. 361.1

Answer 1

The correct option is D 361.1

$V_t=332+0.606\times t$

$V_{\left(50\right)}=332+0.606\times \left(50\right)$

$V_{50}=332+30.3$

$V_{50}=362.3m{s}^{-1}$

pressure does not make any change in the velocity of sound in gas.
Option 'D' is correct.