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What is the approximate distance of a th...

What is the approximate distance of a thunderstorm when you note a 3-s delay between the flash of lightning and the sound of thunder?

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In 3 s, the sound travels (`340 m s^(-1) xx 3 s`) = 1020 m. Because there is no appreciable delay between the time the lightning bolt is created and the time you see it, the storm is slightly more than 1 km (i.e., 1.02 km) away.
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