Question

| Q22. The speed of sound in air at STP is 300m/s. If air pressure
becomes four times, then the speed of sound will be (a) 150m/s (b)
300m/s (c) 600m/s (d)1200m/s.​

Answer 1

Answer:

300m/s

Explanation:

$v = \sqrt{\frac{P}{p}} = \sqrt{\frac{PV}{m}} = \sqrt{\frac{RT}{M}}$

Speed of the sound depends on temperature. Assuming temperature remains same if pressure becomes times the volume of the air column shrinks four times hence change in pressure doesnt effect the speed of sound.