Question

The frequency of a man's voice is 300 hz and its wavelength is 1 meter. if the wavelength of a child's voice is 1.5 m, then the frequency of the child's voice is

Answer 1

Hii buddy,

# Answer- 200 Hz.

# Solution-
Velocity of sound is given by formula
c = λ × f
In this case velocity of sound is constant.

For an adult, (λ=1 m,f=300 Hz)
c = 1×300
c = 300 m/s

For the child, (λ=1.5 m,f=?)
c = 1.5×f2
Putting c=300m/s
300 = 1.5×f
f = 300/1.5
f = 200 Hz.

Frequency of sound by child is 200 Hz.

Thanks for asking...

Answer 2

The frequency of a man’s voice is 200 Hz and its wavelength is 2 m. If the wavelength

of the child’s voice is 1 m, then the frequency of the child’s voice is

what is the answer of this