Question

please answer it correct

Answer 1

Answer:

Explanation:

1)given

time period=0.02 sec

frequency=

frequency=1/time period

               =1/0.02

               =1/0.02×100/100

               =100/2

               =50 Hz

2)frequency =550 Hz

 velocity=330 m/s

find wavelength

v=nλ

λ=v/n

λ=330/550

  =3/5

λ=0.6 m

3)frequency=512 Hz

 wavelength=0.64 m

 velocity =nλ

v=512×0.64

v=327.68 m/s

4)frequency =660 Hz

velocity =330 m/s

wavelength=velocity/frequency

                   =330/660

5)The minimum distance from a sound reflecting surface to hear an echo is 16.5 m.

17 m

                    1/2=0.2

wavelength=0.2 m

5)