Question

The siren from a small town fire station is heard at a location 3 kilometers away. If the air temperature is 20°C, at what velocity did the sound travel? 319 m/s 331 m/s 343 m/s 387 m/s

Answer 1

343 m/s

Step-by-step explanation:

The velocity of sound in dry air varies with temperature as:

v ≈ 331.4 + 0.6 T

where v is velocity in m/s and T is temperature in degrees Celsius.

At 20°C:

v ≈ 331.4 + 0.6 (20)

v ≈ 343.4

So the sound traveled at approximately 343 m/s.