Question

A vibrating blade produces a note of frequency 480 μHz. The velocity of sound in air is 320 m/s. Calculate: (i)The frequency in S.I unit. (ii)The wavelength of sound produced by the blade.

Answer 1

Answer:

A body is vibrating 7200 times in one minute. If the velocity of sound is 360 m/s, find (i) frequency of the vibration in Hz, (ii) the wavelength of the sound produced.

Explanation:

(i) Frequency of vibration is defined as number of vibration per second ,

so , frequency , f=number of vibrations/time in second =7200/60=120Hz ,

(ii) Now given , v=360m/s and f=120Hz

by , v=fλ ,

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or λ=v/f=360/120=3m