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Question

During a track and field meet, the time difference between seeing a smoke from a starter’s gun and hearing the bang would be less ___.


A

on a warm day

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B

on a cool day

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C

if a more powerful shell was used

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D

if a less powerful shell was used

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Solution

The correct option is A

on a warm day


A more powerful shell will increase the amount of smoke without having any effect on the speed of sound. On a warm day, the density of air will be lesser which will help sound travel faster than compared to the denser air present on a cooler day.


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