Question

How long it will take for a sound wave of 25 CM wavelength and 1.5 kHz frequency of, to travel a distance of 1.5 km

Answer 1

Answer:

frequency= 1.5kHz. = 1.5 x 10^3 cm. v = 375m/s.

Explanation:

Given:

frequency= 1.5kHz.

= 1.5 x 10^3 Hz

Wavelength = 2.5cm

= 0.25m

Distance = 1.5km

= 1.5 x 10^3 cm.

We know that,

Velocity of sound = frequency x Wavelength

v = 1.5 x 10^3 x 0.25

v = 0.375 m/s

v = 375m/s.

So we got the velocity.

Now we can easily find the time.

Time= Distance/velocity

t = 1.5 x 10^3/375

t =1500/375

t = 4 s