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Q.

Is it true that one can hear echo sound on hotter days assuming the distance between the reflecting surface and the source of sound production remains the same?


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a

True

b

False  

answer is B.

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Detailed Solution

The above statement is False.
The sound of echo produced is dependent on the distance and time interval between the source of a sound and the reflecting surface. The speed of the sound varies linearly with the temperature of the medium. Hence, on a hotter day, the speed of sound increases, which means distance must also increase but it is supposed to remain the same.
The correct statement would be that you may not be able to hear the echo during the hotter days.
 
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