If the temperature is 20 degrees celsius, how far away is the lightning strike?
Answer Dear Diana, The velocity of sound at 20 degree celcius = 0.6*20 + 332 = 344 m/s Sound and light are produced simultaneously but light reaches the observer almost instantaneously.Distance between observer and the clouds is the distance travelled by the sound in 5 s. Distance travelled by sound in 5 s = 344*5 = 1720 m. Best wishes from, Suresh.
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