Question

If a storm is 7.5 kilometers away, how much time is expected between observations of lightning and thunder?

Answer 1

≈ 22 seconds

Step-by-step explanation:

7,5 km = 7500 m

Speed of light 300 000 000 m/s (for lightning)

Speed of sound 343 m/s (for thunder)

time = distance / speed

lightning time = 7500 m / 300 000 000 m/s = 0.000025 s

thunder time = 7500 m / 343 m/s ≈ 22 s

thunder time - lightning time = 22 s - 0.000025 s ≈ 22 s

Answer 2

Answer. Time taken to hear the thunder is : 7500 / 343 = 21.88 Seconds.