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Q.

Is it true that we can hear the echo sooner on a hot day than on a cold day?


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a

True

b

False  

answer is A.

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Detailed Solution

The above statement is true.
An echo is basically a reflection of sound. The speed of sound in air increases with increased temperature. So, the speed of sound in the air on a hot day is more than the speed of air on a cold day. Hence, it is true that we can hear an echo sooner on a hot day as compared to a cold day.
 
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