Fukuoka Entrance Science Practice Questions - Fukuoka Public High School Entrance Examination - Science Exam

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During a thunderstorm over the Genkai Sea, a student sees a lightning flash and hears the thunder 5.0 seconds later. If sound travels at 340 m/s in air, about how far away was the lightning?

68 m 340 m 3.4 km 1.7 km

Correct Answer:

1.7 km

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