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
• B. on a cool day
• C. if a more powerful shell was used
• D. if a less powerful shell was used

Answer 1

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.