Question

Hi friends!

Calculate the wavelength of the sound waves whose frequency is 220 hz and speed is 990 m/s in a given medium​

Answer 1

To find:-

• The wave length of sound waves

Solution :-

Given,

• Frequency, f = 220 Hz

• Speed = 990 m/s

$\dag\;{\underline{\frak{We\;know}}}$

$\boxed{\sf\ Speed = Frequency \times Wavelength (\lambda)}$

$\dag\;{\underline{\frak{Putting\;the\;values}}}$

$:\implies\sf v= f \times \lambda$

$:\implies\sf 990 = 220\times \lambda$

$:\implies\sf \cancel{\dfrac{990}{220}}= \lambda$

$:\implies\sf 4.5 m = \lambda$

$\boxed {\sf {\purple {Wave\ length\ is\ 4.5m.}}}$

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$\large\qquad\star\;{\underline{\underline{\frak{\red{More\;to\;know :}}}}}$

Time period :- Time taken to complete one vibration or Time require to produce one complete wave .

Wave length :- Length of one complete wave .

→ It is denoted by lambda ! $\sf (\lambda)$

Frequency :-Frequency is denoted by (f)

It is defined as the number of vibration per seconds .

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Answer 2

Answer:

Frequency of the sound wave, ν= 220 Hz

Speed of the sound wave, v = 440 m s-1

For a sound wave,

Speed = Wavelength x Frequencyv = λ x ν

ˆ´ λ= v / ν = 440 / 220 = 2m

Hence, the wavelength of the sound wave is 2 m.

Explanation:

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