Question

please help me in the question . question no 21 . what is the relationship wala

Answer 1

For a sound wave,

velocity = wavelength × frequency

Velocity in m/s

Frequency in Hz

Wavelength in m

(i) As given,

velocity = wavelength × frequency

Therefore,

130 × 10^3 × wavelength = 344

wavelength = 2.62 × 10 ^-3 m

(ii) Audible range = 20 Hz - 20, 000 Hz

Time period = 1 / frequency

Thus time periods =

1 / 20 and 1 / 20, 000

= 0.05 s and 0.00005 s

= 5 × 10 ^-2 s and 5 × 10 ^-5 s