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School Physics Quiz : Sound


Answer the following questions based on sound.

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Multiple choice

Your Performance  

1.

If a flash of lightning is observed in a cloud 1650 m away and the speed of sound in air is 330 m/s, then the sound of thunder will be heard _______ s after the flash of lightning.

  3

  5

  10

  15

  Half-n-half Clue
 

2.

The apparatus used in a ship to find out the depth of the sea underneath is called _______.

  tuning fork

  bell jar

  sonar

  Half-n-half Clue
 

3.

Sounds are produced by musical wind-instruments when columns of air are made to vibrate.

  True

  False

 

4.

Ultrasonic vibrations are used in medicine for imaging internal organs of the human body.

  True

  False

 

5.

Dolphins use infrasonic vibrations to locate objects and their prey.

  True

  False

 

6.

The sound of thunder is heard 10 s after the flash of lightning. If the speed of sound in air is 330 m/s, then the cloud is at a distance of _______.

  33.0 m

  66.0 m

  1650 m

  3300 m

  Half-n-half Clue
 

7.

The repetition of sound which is reflected from an object is referred to as _______.

  an echo

  the pitch

  the amplitude

  Half-n-half Clue
 


 
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