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The speed of sound in air at sea level is 340ms\(^{-1}\) while that of light...

Physics
JAMB 1988

The speed of sound in air at sea level is 340ms\(^{-1}\) while that of light is 300 000kms\(^{-1}\). How far (to the nearest meter) from the center of a thunderstorm is an observer who hears a thunder 2s after a lightning flash?

  • A. 170m
  • B. 340m
  • C. 600m
  • D. 680m
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Correct Answer: Option D
Explanation

Distance = 340 x 2 = 680m

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