Question

Velocity of sound in air ______.
$1$. decreases with temperature
$2$. increases with temperature
$3$. increases with pressure
$4$. is independent of pressure
Which of the following are true?

• A. $2$ and $3$
• B. $1,2$ and $3$
• C. $2$ and $4$
• D. $1,2,3$ and $4$

Answer 1

The correct option is C $2$ and $4$

Velocity of sound in air increases wit temperature and is nearly independent of pressure.

$speed=\sqrt{\frac{\gamma RT}{M}}$

So option C is correct.