Question

A sound source sends waves of 400 Hz. It produces waves of wavelength 2.5 m. The velocity
c) 3 ms-1, 2:4 d) 4 ms-1, 1:2
of sound waves
a) 100 ms-1
b) 1000 ms-1
c) 10000 ms-1 d) 3000 km​

Answer 1

Answer: b

Explanation: Wavelength=2.5m

Frequency=400 Hertz

Distance=2.5 m

Using formula

Velocity=V =frequency x wavelength

V=400*2.5

V=1000 m/s