Question

pritud
1. The sound wave in the diagram represents four vibrations. It was created in 1/10th of
a second. What is the frequency of this sound in Hz?​

Answer 1

(i) : Vibration (b) has the largest amplitude.

(ii) : c vibrates in the fundamental mode. So, c has the least frequency.

(iii) : Frequency of (a),

$fa = \frac{3v}{32L}$

Frequency of (c),

$fc = \frac{v}{2L}$

$⟹ \frac{fa}{fc} = 3$

(iv) : Wavelength of (a),

$λ </p><p>a</p><p> </p><p> = </p><p> \frac{3}{2} </p><p> </p><p> L$

Wavelength of (b),

$λ </p><p>b</p><p> </p><p> =L$

$⟹ </p><p> \frac{λ </p><p>a}{λ </p><p>b} \\ = \frac{3}{2} </p><p>$

Answer 2

4. the sound wave represents 4 vibration it was created in 1/10 of a second what isbthe frequency of this sound in HZ