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km & mi question.

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During a thunderstorm, 5.6 s elapses between observing a lightning flash and hearing the resulting thunder.
Approximately how far away in kilometers and miles was the lightning flash?
 Oct 9, 2013

3+0 Answers

 #1
avatar+118742 
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Speed of sound at sea level is approx 340.29 m/s
340.29m/s * 5.6sec = 1905.624m (the secs cancel out)
1.906km

there is about 5/8 mile in one km (a mile is further than a km)
1.906 * (5/8) = 744 miles
 Oct 10, 2013
 #2
avatar+30 
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Thanks!
 Oct 10, 2013
 #3
avatar+118742 
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and a thank you to you too for your show of appreciation.
I am glad that I helped you.
 Oct 10, 2013

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