(A) Given: Speed of sound $V = 1.7 \, km \, s^{-1} = 1700 \, m \, s^{-1}$.Frequency $\nu = 4.2 \, MHz = 4.2 \times 10^{6} \, Hz$.Wavelength $\lambda =

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(A) Given: Speed of sound $V = 1.7 \, km \, s^{-1} = 1700 \, m \, s^{-1}$.Frequency $\nu = 4.2 \, MHz = 4.2 \times 10^{6} \, Hz$.Wavelength $\lambda = ?$.Using the wave equation $V = \nu \lambda$,we can calculate the wavelength as $\lambda = V / \nu$.Substituting the values: $\lambda = 1700 / (4.2 \times 10^{6}) \, m$.$\lambda \approx 4.047 \times 10^{-4} \, m$,which is approximately $4 \times 10^{-4} \, m$.

Class 9 Science SOUND Mix Example - SOUND

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$A$ hospital uses an ultrasonic scanner to locate tumours in a tissue. What is the wavelength of sound in a tissue in which the speed of sound is $1.7 \, km \, s^{-1}$? The operating frequency of the scanner is $4.2 \, MHz$ $(1 \, MHz = 10^{6} \, Hz)$.

A
$4 \times 10^{-4} \, m$
B
$4.2 \times 10^{-4} \, m$
C
$1.7 \times 10^{-4} \, m$
D
$2.5 \times 10^{-4} \, m$

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Mix Example - SOUND

State three conditions necessary for sound to be heard.

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$(a)$ $A$ boy strikes one end of a long pipe with a stone. Another boy who keeps his ear close to the other end of the pipe hears two sounds in a short interval of time. Explain why.
$(b)$ List two uses of ultrasonics.

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Sound travels in air if

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The given graph shows the displacement versus time relation for a disturbance travelling with a velocity of $1500\, m \,s^{-1}$. Calculate the wavelength of the disturbance.

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In an orchestra,the musical sounds of different instruments are distinguished from one another by the characteristic of

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$A$ hospital uses an ultrasonic scanner to locate tumours in a tissue. What is the wavelength of sound in a tissue in which the speed of sound is $1.7 \, km \, s^{-1}$? The operating frequency of the scanner is $4.2 \, MHz$ $(1 \, MHz = 10^{6} \, Hz)$.

Similar Questions

State three conditions necessary for sound to be heard.

$(a)$ $A$ boy strikes one end of a long pipe with a stone. Another boy who keeps his ear close to the other end of the pipe hears two sounds in a short interval of time. Explain why.$(b)$ List two uses of ultrasonics.

Sound travels in air if

The given graph shows the displacement versus time relation for a disturbance travelling with a velocity of $1500\, m \,s^{-1}$. Calculate the wavelength of the disturbance.

In an orchestra,the musical sounds of different instruments are distinguished from one another by the characteristic of

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$(a)$ $A$ boy strikes one end of a long pipe with a stone. Another boy who keeps his ear close to the other end of the pipe hears two sounds in a short interval of time. Explain why.
$(b)$ List two uses of ultrasonics.