Class 9 Science SOUND Mix Example - SOUND

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$(a)$ What type of wave is represented by a density-distance graph?
$(b)$ What is meant by a transverse wave? Give an example.

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(N/A) density-distance graph represents a longitudinal wave,as longitudinal waves involve variations in density and pressure of the medium.
$(b)$ $A$ transverse wave is a wave in which the particles of the medium vibrate in a direction perpendicular to the direction of wave propagation. An example of a transverse wave is the wave produced in a vibrating string or light waves.

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Mix Example - SOUND

$(a)$ $A$ 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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The bells of a temple are made of large size. It is for

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$(i)$ What causes the reverberation of thunder sound?
$(ii)$ $A$ $SONAR$ device on a submarine sends a signal and receives an echo $5 \, s$ later. Calculate the speed of sound in water if the distance of the object from the submarine is $3625 \, m$.

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If $20$ waves are produced per second,what is the frequency in hertz (in $, Hz$)?

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State the relationship between frequency and time period of a wave. The wavelength of vibrations produced on the surface of water is $2 \, cm$. If the wave velocity is $16 \, m s^{-1}$, find its frequency and time period.

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$(a)$ What type of wave is represented by a density-distance graph?$(b)$ What is meant by a transverse wave? Give an example.

Similar Questions

$(a)$ $A$ 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.

The bells of a temple are made of large size. It is for

$(i)$ What causes the reverberation of thunder sound?$(ii)$ $A$ $SONAR$ device on a submarine sends a signal and receives an echo $5 \, s$ later. Calculate the speed of sound in water if the distance of the object from the submarine is $3625 \, m$.

If $20$ waves are produced per second,what is the frequency in hertz (in $, Hz$)?

State the relationship between frequency and time period of a wave. The wavelength of vibrations produced on the surface of water is $2 \, cm$. If the wave velocity is $16 \, m s^{-1}$, find its frequency and time period.

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$(a)$ What type of wave is represented by a density-distance graph?
$(b)$ What is meant by a transverse wave? Give an example.

$(a)$ $A$ 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.

$(i)$ What causes the reverberation of thunder sound?
$(ii)$ $A$ $SONAR$ device on a submarine sends a signal and receives an echo $5 \, s$ later. Calculate the speed of sound in water if the distance of the object from the submarine is $3625 \, m$.